Abstract

Disclosed in the embodiments of the present application are related methods and apparatuses for a power distribution network digital platform, and a device, a medium and a product. Among the related methods, a training method for a simulation model of a power distribution network comprises: acquiring real-time data or historical data of a power distribution network collected by sensors, instruments and devices; performing pre-processing operations on the real-time data or historical data of the power distribution network to obtain a training sample set, wherein the pre-processing operations comprise data cleaning, denoising and format conversion; on the basis of using actual data during an actual operation process of the power distribution network as labeling information, and on the basis of training samples, training a simulation model to be trained, so as to obtain a trained simulation model; on the basis of different device components in the power distribution network having different response speeds when a system operation state changes, determining a multi-rate parallel simulation technique for the power distribution network; and using the multi-rate parallel simulation technique for the power distribution network to adjust the simulation step size of the trained simulation model, so as to obtain a final optimized model.

IPC Classes  ?

• G06F 30/27 - Design optimisation, verification or simulation using machine learning, e.g. artificial intelligence, neural networks, support vector machines [SVM] or training a model

Abstract

A voiceprint-based transformer partial discharge detection method, an apparatus, a device, and a storage medium. The method comprises: collecting a voiceprint signal in a transformer, and transmitting the collected voiceprint signal into a signal processing unit (220) for subsequent signal processing (S1); processing the voiceprint signal in the transformer by means of the signal processing unit (220) to obtain parameters (S2); determining the type of the transformer partial discharge by means of a partial discharge classifier unit (230) on the basis of the parameters (S3); and dividing the partial discharge state to obtain a detected state level classification result (S4).

IPC Classes  ?

• G01R 31/12 - Testing dielectric strength or breakdown voltage
• G01R 31/08 - Locating faults in cables, transmission lines, or networks
• G01R 1/07 - Non contact-making probes
• G08B 21/18 - Status alarms
• G10L 17/26 - Recognition of special voice characteristics, e.g. for use in lie detectorsRecognition of animal voices

Abstract

Embodiments of the present invention provide a method and apparatus for suppressing transient current of a grid-forming converter, a computing device, a computer-readable storage medium, and a computer program product. The suppressing method comprises: calculating first virtual impedance on the basis of an actual voltage instantaneous value of a point of common coupling; calculating second virtual impedance on the basis of an actual current maximum amplitude of the point of common coupling; and suppressing the transient current of the grid-forming converter on the basis of the first virtual impedance and the second virtual impedance. In this way, by combining the actual voltage instantaneous value of the point of common coupling and the actual current maximum amplitude of the point of common coupling, transient current can be suppressed at the moment when a fault occurs in a grid-forming converter, thereby avoiding misoperation triggering of a protection apparatus, and ensuring that the grid-forming converter can restore stable operation once the fault is removed.

IPC Classes  ?

• H02M 1/32 - Means for protecting converters other than by automatic disconnection

Abstract

The present application relates to a thermochemical energy storage and release system, and an energy charging method for a heat storage and release material. The thermochemical energy storage and release system in the present application comprises: a reactor (1); and a microwave generator (2) and heat storage and release materials (3), which are arranged in the reactor (1). In the present application, microwaves directly act on the heat storage and release materials (3) to perform energy charging, thereby significantly improving the energy charging response speed, rationally reducing the energy charging temperature, and accelerating the regeneration process of thermochemical energy storage.

IPC Classes  ?

• F28D 20/02 - Heat storage plants or apparatus in generalRegenerative heat-exchange apparatus not covered by groups or using latent heat
• F22B 1/02 - Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers

Abstract

The present application relates to the technical field of network security. Disclosed are a software-defined-network-based cloud-edge collaborative defense system and method for unknown attacks. The system comprises a main station deployed at a cloud end and a plurality of edge stations deployed at an edge end. A software defined security platform comprises a main controller, a security controller and a security component resource pool. Any one of the edge stations comprises an edge controller. The security controller is configured to receive network security information uploaded by the main controller and/or any one of the edge controllers, identify an unknown attack on the basis of the network security information, generate a corresponding defense strategy and issue the defense strategy to the security component resource pool, the main controller and/or any one of the edge controllers. The security component resource pool is configured to virtualize a security protection function into a security component, and configure the main station and/or any one of the edge stations with the security component on the basis of the network security information or the defense strategy. The problem of traditional static and rigid defense measures and strategies being unable to meet the requirements for defending against unknown attacks is solved.

IPC Classes  ?

• H04L 9/40 - Network security protocols

Abstract

The present application provides a multi-level coordinated voltage control method and system for a power distribution network based on three-tier priority objectives. The method comprises: acquiring operation parameters of a power distribution network; on the basis of the operation parameters of the power distribution network and a pre-constructed three-tier optimization objective planning model, using an affine theory, a duality theory, and power circle linearization and absolute value linearization methods to solve the three-tier optimization objective planning model to obtain maximization of an admissible net-load disturbance domain at each node, minimization of the total operation cost of the power distribution network and minimization of an expected voltage deviation; and performing coordinated control on various reactive devices of the power distribution network by means of the operation parameters of the power distribution network corresponding to the maximization of the admissible net-load disturbance domain at each node, the minimization of the total operation cost of the power distribution network and the minimization of the expected voltage deviation. The present application can more clearly characterize the uncertainty of distributed generation power output and the impact of the distributed generation power output on system reserve capacity, and mitigate the problems of ambiguous characterization of distributed generation power output characteristics, and multi-level voltage violation and voltage fluctuation of the power distribution network caused by large-scale distributed generation integration.

IPC Classes  ?

• H02J 3/14 - Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading

Abstract

The present invention relates to the technical field of knowledge transfer, and specifically to a power cross-modal bidirectional knowledge transfer method and apparatus based on intermediary space construction, and a device and a storage medium. The method comprises: using graph modeling and a graph neural network to extract a first feature of first modal data, and using a large language model to extract a second feature of second modal data; on the basis of the similarity between the first feature and the second feature and a corresponding loss function, constructing an intermediary space; using a loss function in the intermediary space to iteratively optimize parameters in the graph neural network and the large language model; and on the basis of the graph modeling, the graph neural network with parameters iteratively optimized, and the feature extracted by the large language model, performing knowledge transfer in the intermediary space. By means of the method, relationship features extracted in different modes are aligned in an intermediary space, thereby realizing bidirectional knowledge transfer between different modal data.

IPC Classes  ?

• G06N 3/096 - Transfer learning
• G06N 3/042 - Knowledge-based neural networksLogical representations of neural networks
• G06N 3/0464 - Convolutional networks [CNN, ConvNet]
• G06F 40/30 - Semantic analysis
• G06F 18/22 - Matching criteria, e.g. proximity measures
• G06F 18/25 - Fusion techniques
• G06Q 50/06 - Energy or water supply
• G06N 3/048 - Activation functions

Abstract

The present invention relates to the technical field of high-voltage power transmission, and disclosed are an IGBT overvoltage protection device and method. The IGBT overvoltage protection device comprises: a controller, an overvoltage determination unit, a voltage collection unit, and a drive circuit. The voltage collection unit is used for collecting a voltage between a collector and an emitter of an IGBT; the overvoltage determination unit is used for comparing the collected voltage with a plurality of reference voltages and then outputting a plurality of overvoltage determination results; the drive circuit is used for controlling on/off of the IGBT on the basis of a drive signal; and the controller determines the current operation condition of the IGBT, then selects an overvoltage determination result corresponding to the current operation condition, and drives, on the basis of the overvoltage determination result, the drive circuit to perform overvoltage protection on the IGBT. According to the present invention, on the basis of the working condition of an IGBT, a voltage comparison result corresponding to said working condition is selected, and the IGBT is controlled to be turned on for a corresponding time period on the basis of the voltage comparison result, thereby implementing controllable and rapid overvoltage protection of the IGBT.

IPC Classes  ?

• H03K 17/081 - Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit
• H02M 1/088 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices

Abstract

The present disclosure relates to the technical field of switch control. Disclosed are a transmission system and method for a mechanical part and a power electronic assembly. The system comprises: a mechanical transmission shaft, a starting signal generator and a control unit, wherein the starting signal generator comprises a turntable and at least one optical fiber collimator; one end of the mechanical transmission shaft is connected to the mechanical part of a power electronic on-load tap-changer, and the other end of the mechanical transmission shaft is connected to the turntable, the mechanical transmission shaft being configured, when the mechanical part is in action, to drive the turntable to rotate; and the control unit controls, on the basis of the state of a received optical signal, whether to trigger the power electronic assembly of the power electronic on-load tap-changer. The present disclosure utilizes the advantages of stable transmission and strong anti-interference capability of an optical signal, and achieves, by means of identifying changes in the optical signal, real-time monitoring of the mechanical state, thus providing an action starting reference point for coordinated control of action timing, improving the accuracy and reliability of controlling the triggering of the power electronic assembly.

IPC Classes  ?

• H01H 3/32 - Driving mechanisms, i.e. for transmitting driving force to the contacts
• H01H 9/54 - Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
• G02B 6/32 - Optical coupling means having lens focusing means
• G02B 6/38 - Mechanical coupling means having fibre to fibre mating means

Abstract

Embodiments of the invention provides a smart outdoor switchgear for control and protection of connection and disconnection of a medium-voltage microgrid, which includes: a current transformer, an isolating switch mechanism, an outdoor circuit breaker, an electric isolating driving mechanism and an outdoor jet type fuse. The current transformer is installed on an outlet end of the outdoor circuit breaker. The isolating switch mechanism is connected to the current transformer, and the isolating switch mechanism is connected to the outlet end of the outdoor circuit breaker through the current transformer. A top of the isolating switch mechanism on a side away from the current transformer is connected to a top of the outdoor jet type fuse, and a bottom of the isolating switch mechanism on the side away from the current transformer is connected to a bottom of the outdoor jet type fuse. The electric isolating driving mechanism is installed on the bottom of the isolating switch mechanism.

IPC Classes  ?

• H01H 85/041 - Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
• H01H 33/666 - Operating arrangements
• H01H 85/143 - Electrical contactsFastening fusible members to such contacts
• H01H 85/175 - Casings characterised by the casing shape or form
• H01H 85/20 - Bases for supporting the fuseSeparate parts thereof
• H01H 89/00 - Combinations of two or more different basic types of electric switches, relays, selectors and emergency protective devices, not covered by any single one of the other main groups of this subclass
• H02H 7/26 - Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occurred

Abstract

The present disclosure relates to the technical field of smart power grids. Disclosed are a method and apparatus for constructing a high-order tensor network of a large-scale power grid, and a device and a medium. The method comprises: acquiring multiple category attribute sets of heterogeneous nodes in a large-scale power grid; performing feature extraction on the multiple category attribute sets, so as to obtain attribute features of the heterogeneous nodes; on the basis of the attribute features of the heterogeneous nodes, using a deep hash mapping model to establish multiple feature sub-spaces; using a breadth learning strategy to align the multiple feature sub-spaces to a unified feature dimension; on the basis of an attribute feature vector of the unified feature dimension, using a distance measurement method to calculate a distance measurement value between the heterogeneous nodes; on the basis of the attribute feature vector of the unified feature dimension and the weight of a heterogeneous node interaction relationship, determining a basis tensor for representing the heterogeneous node interaction relationship; and on the basis of the basis tensor and the weight of the heterogeneous node interaction relationship, using a tensor multiplication operation rule to construct a high-order tensor network of a large-scale power grid.

IPC Classes  ?

• G06F 18/213 - Feature extraction, e.g. by transforming the feature spaceSummarisationMappings, e.g. subspace methods

Abstract

The present application provides a mains-frequency current transformer-based high-frequency discharge signal detection apparatus and method, applicable in the field of power device online monitoring. The apparatus comprises a signal acquisition module and a signal processing module; the signal processing module comprises a frequency divider circuit and an intelligent device; the signal acquisition module is arranged on a secondary junction box of a mains-frequency current transformer of a transformer and is connected to the frequency divider circuit, the signal acquisition module is configured to acquire a signal of the transformer and transmit the signal to the frequency divider circuit, and the signal comprises a mains-frequency signal and a high-frequency discharge signal; the frequency divider circuit is connected to the intelligent device, and the frequency divider circuit is configured to separate the mains-frequency signal from the high-frequency discharge signal and transmit the high-frequency discharge signal to the intelligent device; and the intelligent device is configured to analyze the high-frequency discharge signal.

IPC Classes  ?

• G01R 31/12 - Testing dielectric strength or breakdown voltage
• G01R 31/62 - Testing of transformers
• G01R 15/18 - Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers

Abstract

Provided in the present application is an optical fiber bundle airtight sealing device, comprising a fixing seat, wherein a guide tube is fixedly mounted at the top end of the fixing seat; a locking assembly is provided inside the guide tube; a mounting seat is fixedly mounted at the top end of the guide tube; a rotary table is provided inside the mounting seat; a housing is provided above the rotary table; an optical fiber bundle light guide assembly is provided inside the housing; the rotary table is rotatably connected to the inner wall of a recess of the mounting seat, and the locking assembly may limit and fix the rotary table; an adjusting assembly is provided inside the mounting seat, and the adjusting assembly may adjust the direction of the rotary table; adjusting brackets are fixedly mounted on two sides of the housing at the top end of the rotary table, and the adjusting brackets are rotatably connected to the housing; and a damping member is provided at the joint of each adjusting bracket and the housing, the damping member being used for preventing rotation between the adjusting bracket and the housing. The direction of the optical fiber bundle light guide assembly is accurately adjusted by means of both the rotary table and the adjusting brackets, and the rotary table and the adjusting brackets are limited by means of the locking assembly and the damping members, thereby ensuring operational stability.

IPC Classes  ?

• F21V 14/00 - Controlling the distribution of the light emitted by adjustment of elements
• F21V 17/02 - Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages with provision for adjustment
• F21V 17/10 - Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
• F21V 31/00 - Gas-tight or water-tight arrangements
• F21V 8/00 - Use of light guides, e.g. fibre optic devices, in lighting devices or systems

Abstract

An energy management method and system for peak shaving and frequency regulation for an energy storage power station, and an apparatus, an electronic device, a storage medium and a product, which belong to the technical field of energy storage. The method comprises: acquiring a peak shaving instruction and a frequency regulation instruction of a power grid within each time period; dividing the SOC of each battery energy storage unit within each time period into a peak shaving area and a frequency regulation area, calculating the maximum power generable in the peak shaving area on the basis of the peak shaving instruction, determining the number of battery energy storage units participating in peak shaving, determining the maximum power generable in the frequency regulation area on the basis of the remaining battery energy storage units and the frequency regulation instruction, and determining the number of battery energy storage units participating in frequency regulation; and determining a peak shaving area objective function on the basis of the number of battery energy storage units participating in peak shaving, determining a frequency regulation area objective function on the basis of the number of battery energy storage units participating in frequency regulation, and on the basis of the peak shaving area objective function and the frequency regulation area objective function, respectively calculating power instructions of the battery energy storage units participating in peak shaving and power instructions of the battery energy storage units participating in frequency regulation. In this way, the frequency regulation capability of an energy storage power station is enhanced, and the utilization efficiency of the battery energy storage power station is improved.

IPC Classes  ?

• H02J 3/32 - Arrangements for balancing the load in a network by storage of energy using batteries with converting means
• H02J 3/24 - Arrangements for preventing or reducing oscillations of power in networks

Abstract

A new-power-system power grid restoration method and apparatus based on second-order cone transformation. The method comprises: acquiring power data of a new power system (101); on the basis of the power data and taking the output uncertainty of a new energy unit into consideration, constructing a mixed-integer nonlinear two-stage robust optimization model based on a multi-state uncertainty set (102), wherein the model comprises an alternating-current power flow constraint; using a second-order cone relaxation technique to simplify the alternating-current power flow constraint, and converting the mixed-integer nonlinear two-stage robust optimization model into a mixed-integer second-order cone two-stage robust optimization model (103); decomposing the mixed-integer second-order cone two-stage robust optimization model into a main question and a sub-question, and solving the main question and the sub-question, so as to obtain an optimization result (104); and on the basis of the optimization result, generating a power grid restoration scheme for the new power system (105).

IPC Classes  ?

• H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks
• G06F 113/04 - Power grid distribution networks
• G06Q 10/04 - Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem"

Abstract

Disclosed in the present invention are a composite organic nano superhydrophobic anti-icing coating and a preparation method therefor. The coating comprises a cementitious material, water, and a curing agent; the cementitious material comprises organic fluorosilicone rubber, an acrylic resin, a thermal spraying natural basalt powder material, a fumed silica inorganic filler, a nano mesoporous molecular sieve material and hydroxy terminated silicone rubber; and in parts by weight, the coating comprises the following components: 15-20 parts of organic fluorosilicone rubber; 30 parts of the acrylic resin; 30 parts of the thermal spraying natural basalt powder material; 15-20 parts of the fumed silica inorganic filler; 10-15 parts of the nano mesoporous molecular sieve material; 10 parts of hydroxy terminated silicone rubber; 20-30 parts of water; and 1 part of a silane coupling agent. In an anti-icing performance test, in a severe environment with the temperature of -2 to -6°C and the humidity of 80% or above, in an initial stage, the superhydrophobic coating of a flat sample can effectively reduce the increase of the icing amount, the adhesion measured according to the test standard GB/T 9286-1998 is grade 1, and the water contact angle measured according to the standard QB/C 0611-2005 is 105 degrees, which indicates that the coating has a certain anti-icing capability.

IPC Classes  ?

• C09D 183/06 - Polysiloxanes containing silicon bound to oxygen-containing groups
• C09D 183/08 - Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen
• C09D 183/04 - Polysiloxanes
• C09D 7/62 - Additives non-macromolecular inorganic modified by treatment with other compounds
• C09D 7/63 - Additives non-macromolecular organic
• C09D 7/65 - Additives macromolecular
• C09K 3/18 - Materials not provided for elsewhere for application to surface to minimize adherence of ice, mist or water theretoThawing or antifreeze materials for application to surfaces

Abstract

Provided in the present application are a modular cap-type OPGW insulated splicing device and system. The modular cap-type OPGW insulated splicing device comprises a base, an enclosure detachably connected to the top of the base, a fiber storage tray detachably connected to the base and located in the enclosure, assembly components detachably connected to the bottom of the base, a connection box integrally formed at the bottom of the base, and insulators detachably connected to the ends of the assembly components facing away from the base, wherein a first positioning ring protrudes from the top surface of the base, a second positioning ring protrudes downwards from the bottom of the enclosure, the first positioning ring abuts against an inner ring of the enclosure, and the second positioning ring abuts against the outer peripheral face of the base; and the assembly components each comprise a first connection end, an insulating portion and a second connection end which are connected in sequence. The modular cap-type OPGW insulated splicing system comprises a tower and a modular cap-type OPGW insulated splicing device connected to the tower.

IPC Classes  ?

• G02B 6/44 - Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
• G02B 6/255 - Splicing of light guides, e.g. by fusion or bonding
• G02B 6/38 - Mechanical coupling means having fibre to fibre mating means
• G02B 6/42 - Coupling light guides with opto-electronic elements

Abstract

The present application provides a system energy efficiency optimization method and apparatus based on a comprehensive energy demand, an electronic device, and a storage medium. The method comprises: in response to a received target comprehensive energy demand, on the basis of comprehensive energy demand parameters, operation parameters of a target system, and environmental loss parameters of the target system, constructing an energy efficiency optimization function of the target system (S210); on the basis of a balance relationship between the energy supply and the energy consumption and a device operation demand of transmitting energy, constructing constraint conditions for optimizing the energy efficiency of the target system (S220); and on the basis of the energy efficiency optimization function and the constraint conditions, using a target algorithm to process operation parameters of a plurality of devices by taking the operation parameters of the plurality of devices in the target system as population individuals to obtain device parameters of the target system meeting the target comprehensive energy demand (S230).

IPC Classes  ?

• G06Q 10/0631 - Resource planning, allocation, distributing or scheduling for enterprises or organisations
• G06N 3/126 - Evolutionary algorithms, e.g. genetic algorithms or genetic programming

Abstract

Disclosed in the present invention are a method and apparatus for determining the current amplitude of a cable, and a processor. The method comprises: acquiring a target current waveform of a cable within a certain duration (S101); correcting an initial current frequency of the cable on the basis of a phase difference between current waveforms of the cable within two adjacent periods in the target current waveform, so as to obtain a target current frequency of the cable (S102); determining a first number for complete-period sampling points on the basis of the target current frequency and a sampling frequency (S103), wherein the sampling frequency is used for indicating a time interval for collecting a current value on the target current waveform; selecting a second number of sampling points from the target current waveform on the basis of a first number of complete-period sampling points and the sampling frequency (S104), wherein there is a multiple relationship between the first number and the second number, and the second number is greater than the first number; and determining the current amplitude of the cable on the basis of current values corresponding to the second number of sampling points (S105).

IPC Classes  ?

• G01R 19/00 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof
• G01R 19/02 - Measuring effective values, i.e. root-mean-square values

Abstract

Provided are a method for optimizing system energy efficiency and apparatus based on an integrated energy requirement, an electronic device, and a storage medium. The method includes, in response to a received target integrated energy requirement, constructing the energy efficiency optimization function of a target system according to an integrated energy requirement parameter, the operating parameter of the target system, and the environment loss parameter of the target system; constructing a constraint condition for optimizing the energy efficiency of the target system based on the balance relationship between energy supply and energy consumption and a device operating requirement for transmitting energy; and based on the energy efficiency optimization function and the constraint condition, using a target algorithm, using operating parameters of multiple devices in the target system as population individuals.

IPC Classes  ?

• G05B 19/042 - Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors

Abstract

The present application provides an internal inspection robot. The internal inspection robot comprises: a housing (1), wherein the housing (1) is configured as a closed structure formed by sequentially connecting a first housing (11) and a second housing (12) arranged opposite to each other, a third housing (13) and a fourth housing (14) arranged opposite to each other, and a fifth housing (15) and a sixth housing (16) arranged opposite each other, the first housing (11) and the second housing (12) are both configured as rectangular housings, the third housing (13) and the fourth housing (14) are both configured as circular arc-shaped housings, and the fifth housing (15) and the sixth housing (16) are both configured as ellipsoid-like housings; a gravity balancing device (2) arranged inside the housing (1), wherein the gravity balancing device (2) is configured to control the pose of the internal inspection robot; and a power device (3) and a plurality of sensor devices arranged on the surface of the housing (1), wherein the power device (3) is configured to receive a motion control signal from a control end and drive the internal inspection robot to move, and the plurality of sensor devices are respectively configured to provide sensing signals to the control end.

IPC Classes  ?

• B25J 11/00 - Manipulators not otherwise provided for
• B25J 19/02 - Sensing devices
• G01D 21/02 - Measuring two or more variables by means not covered by a single other subclass

Abstract

Provided are a method for constructing a transverse audible noise model for an electric transmission corridor, a microphone support apparatus, and an audible noise measurement device. The method for constructing the transverse audible noise model for the electric transmission corridor includes measuring noise at the background noise measurement point of the electric transmission corridor, the N noise measurement points of the electric transmission corridor, and the M noise verification points of the electric transmission corridor simultaneously; fitting an objective function Provided are a method for constructing a transverse audible noise model for an electric transmission corridor, a microphone support apparatus, and an audible noise measurement device. The method for constructing the transverse audible noise model for the electric transmission corridor includes measuring noise at the background noise measurement point of the electric transmission corridor, the N noise measurement points of the electric transmission corridor, and the M noise verification points of the electric transmission corridor simultaneously; fitting an objective function z = k 1 ⁢ sin ⁡ ( k 2 ⁢ x ) + k 3 ⁢ e ? + k 5 ⁢ x 3 + k 6 ⁢ x 2 + k 7 ⁢ x + k 8 ? indicates text missing or illegible when filed Provided are a method for constructing a transverse audible noise model for an electric transmission corridor, a microphone support apparatus, and an audible noise measurement device. The method for constructing the transverse audible noise model for the electric transmission corridor includes measuring noise at the background noise measurement point of the electric transmission corridor, the N noise measurement points of the electric transmission corridor, and the M noise verification points of the electric transmission corridor simultaneously; fitting an objective function z = k 1 ⁢ sin ⁡ ( k 2 ⁢ x ) + k 3 ⁢ e ? + k 5 ⁢ x 3 + k 6 ⁢ x 2 + k 7 ⁢ x + k 8 ? indicates text missing or illegible when filed to a point sequence constructed based on a noise correction value DBnA and coordinates (xn, 0); and in response to determining that a mean error between DBnB and the objective function satisfies accuracy requirements, obtaining the transverse audible noise model for the electric transmission corridor.

IPC Classes  ?

• G10L 21/0216 - Noise filtering characterised by the method used for estimating noise

Abstract

An internal inspection robot includes a housing, a gravity balancing apparatus, a power apparatus, and multiple sensor apparatuses. The housing is configured to be a sealed structure including a first housing, a second housing, a third housing, a fourth housing, a fifth housing, and a sixth housing. The gravity balancing apparatus is disposed inside the housing and configured to control the pose of the internal inspection robot. The power apparatus and the multiple sensor apparatuses are disposed on the surface of the housing. The power apparatus is configured to receive a motion control signal from a control terminal to drive the internal inspection robot to move. The multiple sensor apparatuses are configured to provide a sensing signal to the control terminal.

IPC Classes  ?

• B25J 11/00 - Manipulators not otherwise provided for
• B25J 9/16 - Programme controls
• B25J 19/00 - Accessories fitted to manipulators, e.g. for monitoring, for viewingSafety devices combined with or specially adapted for use in connection with manipulators
• B25J 19/02 - Sensing devices

Abstract

The present invention relates to the technical field of power electronic conversion. Disclosed are an off-grid and grid-connected state switching control method and control system for a grid-forming energy storage converter. The method comprises: S1, when a grid-connected relay for target energy storage is turned off and is in an off-grid state, a converter using a power single-loop control strategy; S2, measuring the voltage of a power grid under the power single-loop control strategy, and when the value of the voltage of the power grid is within a preset normal range, the converter performing a pre-synchronization algorithm; S3, in the pre-synchronization algorithm, realizing the voltage amplitude consistency and phase consistency between a target converter and the power grid; S4, when the grid-connected relay for target energy storage is turned on and is in a grid-connected transient state, the converter using a control strategy of cascading a power loop with a virtual impedance loop; and S5, after a grid-connected steady state, the converter using a control strategy of cascading the power loop with voltage and current double loops. The present invention solves the problems in respect of large current surges and unstable states during switching occuring in existing off-grid and grid-connected state switching operation strategies.

IPC Classes  ?

• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers

Abstract

Disclosed in the present invention are a shared energy storage power station energy management method and system considering cluster division, which belongs to the technical field of energy storage. The method comprises: according to requirements, dividing a shared energy storage power station into a plurality of clusters, each cluster comprising a plurality of battery energy storage units; on the basis of parameters of the shared energy storage power station in a time period t and electricity prices in cluster-involved markets, generating a battery energy storage unit parameter table; acquiring a power demanded by a power grid for shared energy storage in a time period T; and allocating the power of each battery energy storage unit in the power station in the time period T. The present invention uses a battery energy storage unit cluster division method considering a sharing mechanism, and can increase the total income of the shared energy storage power station while considering SOC conditions of the battery energy storage units. The present method considers both economic efficiency and SOC consistency, thereby satisfying dispatchability requirements while ensuring the system economic efficiency.

IPC Classes  ?

• H02J 3/32 - Arrangements for balancing the load in a network by storage of energy using batteries with converting means

Abstract

The present invention relates to the technical field of power electronics converters and discloses a grid-forming energy storage converter on/off-grid switching control method and system, where the method includes the following steps: S1: using a single-loop power control strategy in an off-grid state when an on-grid relay of target energy storage drops out; S2: using a parallel virtual impedance loop-based power control strategy in a transient on-grid state when the on-grid relay of target energy storage pulls in; and S3: using a cascaded dual-loop power control strategy with a virtual admittance voltage loop and an inner current loop when a stable on-grid state is established. The present invention solves the problems of large current impact and unstable switching process state in the existing working strategy for on/off-grid switching in the prior art.

IPC Classes  ?

• H02J 3/24 - Arrangements for preventing or reducing oscillations of power in networks
• G05B 11/42 - Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential for obtaining a characteristic which is both proportional and time-dependent, e.g. P. I., P. I. D.
• H02J 3/18 - Arrangements for adjusting, eliminating or compensating reactive power in networks

Abstract

Provided are an imaging method and system for residual stress of a basin insulator and a method for preparing a test block. The imaging method includes cutting and preparing a standard industrial sample of a basin insulator and testing the acoustoelastic coefficient of the standard industrial sample; then obtaining the residual stress data of the basin insulator and obtaining the spatial point sound velocity distribution of the basin insulator; finally, obtaining a stress distribution cloud map of the basin insulator by calculation of the attribute value and the coordinate data of a to-be-measured location, and performing reliability verification based on the residual stress data.

IPC Classes  ?

• G01N 3/12 - Pressure-testing
• G01N 1/44 - Sample treatment involving radiation, e.g. heat
• G01N 29/06 - Visualisation of the interior, e.g. acoustic microscopy
• G01N 29/07 - Analysing solids by measuring propagation velocity or propagation time of acoustic waves
• G01N 29/22 - Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic wavesVisualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object Details
• G01N 33/44 - ResinsPlasticsRubberLeather

Abstract

A method for aggregation regulation optimization of an electric vehicle load by considering a comprehensive response coefficient is disclosed. The method includes the following steps: Step 1, collecting electric vehicle charging information; Step 2, based on the electric vehicle charging information collected in Step 1, calculating aggregation regulation response indexes for user participation, and determining a weight of each aggregation regulation response index; Step 3, based on the calculation result of each aggregation regulation response index for user participation obtained in Step 2, calculating a comprehensive response coefficient of an electric vehicle; and Step 4, performing the aggregation regulation optimization of the electric vehicle load by using minimum load power deviation determined by a dispatching scheme and an actually considered comprehensive response coefficient as a target and using a load rate, a peak-valley difference and a load fluctuation rate after dispatching as constraints.

IPC Classes  ?

• B60L 53/62 - Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
• B60L 53/65 - Monitoring or controlling charging stations involving identification of vehicles or their battery types
• B60L 53/66 - Data transfer between charging stations and vehicles

Abstract

Disclosed in the present invention are an application post-downloading method and apparatus, a system-on-chip, a terminal, and a storage medium. The method comprises: a terminal compiling a source program of an application to be downloaded, so as to obtain a loadable file, and performing post-compilation on the loadable file, so as to obtain file header information, wherein the file header information comprises first running resource information and first storage space information of the loadable file in the terminal; on the basis of the first storage space information, a system-on-chip dynamically allocating the storage space of the system-on-chip, so as to obtain second storage space information; on the basis of the second storage space information, downloading the loadable file to the system-on-chip, so as to form an executable file; on the basis of the first running resource information, dynamically allocating running resources of the system-on-chip, so as to obtain second running resource information; and on the basis of the second storage space information and the second running resource information, running the executable file in the system-on-chip. In this way, the storage space of a system-on-chip can be saved on, and flexible application management can also be realized, thereby improving the usage experience of a user.

IPC Classes  ?

• G06F 9/445 - Program loading or initiating

Abstract

Disclosed in the present application are a self-energy-taking hybrid direct-current circuit breaker and an application method therefor. In the self-energy-taking hybrid direct-current circuit breaker, a breaking branch is connected to a through-current branch in parallel, a first end of a grounding branch is connected to the breaking branch, and a second end of the grounding branch is grounded. When a direct-current system operates stably, the through-current branch conducts a steady-state running current of the direct-current system, and when the direct-current system breaks down, a self-energy-taking capacitor in the breaking branch assists a power electronic device in achieving the breaking of a fault current.

IPC Classes  ?

• H02H 3/087 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess current for DC applications
• H03K 17/56 - Electronic switching or gating, i.e. not by contact-making and -breaking characterised by the use of specified components by the use, as active elements, of semiconductor devices

Abstract

The present invention provides an alternating current/direct current multi-air-gap magnetoresistive current sensor and a current measurement method. The alternating current/direct current multi-air-gap magnetoresistive current sensor comprises: a magnetic-to-electric conversion unit used for acquiring a magnetic field signal of a target current-carrying wire to which a current to be measured is introduced, converting the magnetic field signal into an electric signal and then outputting the electric signal to a signal processing unit, wherein the magnetic-to-electric conversion unit uses a multi-air-gap band-based closed-loop iron core type structure; the signal processing unit used for amplifying the electric signal and then outputting the electric signal to a feedback compensation unit; and the feedback compensation unit used for adjusting a feedback current on the basis of the amplified voltage signal to enable a novel magnetoresistive element to always work at zero magnetic flux, measuring the value of the feedback current, on the basis of the value of the feedback current, obtaining the value of the current to be measured, and outputting the value of the current to be measured. According to the alternating current/direct current multi-air-gap magnetoresistive current sensor and the current measurement method provided by the embodiments of the present invention, the measurement performance of the current sensor is improved and the problem of the difficulty in achieving both high accuracy and a wide frequency domain of alternating current/direct current measurement is solved.

IPC Classes  ?

• G01R 19/00 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof
• G01R 15/20 - Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices

Abstract

A method and apparatus for determining the safety inertia of a power grid system, and a computer device. The method comprises: determining a first safety inertia for ensuring safe operation of a power grid system when a frequency change rate after disturbance occurs in the power grid system exceeds a first threshold (S302); determining a second safety inertia for ensuring the safe operation of the power grid system when the frequency after the disturbance occurs in the power grid system is less than a second threshold (S304); and determining a target safety inertia according to the first safety inertia and the second safety inertia, wherein the target safety inertia is a safety inertia lower limit value for ensuring the safe operation of the power grid system (S306).

IPC Classes  ?

• H02J 3/24 - Arrangements for preventing or reducing oscillations of power in networks

Abstract

A vertical thyristor switch for a controllable surge arrester includes an insulating sleeve and a vertical cylindrical switch core body encapsulated inside the insulating sleeve. The switch core body includes thyristor valve sections, a reactor, driving units, a voltage equalizing assembly section, a structural member and a connecting member; and after being connected to the driving units on one side of the thyristor valve sections, the thyristor valve sections are arranged, together with the voltage equalizing assembly section, in a space of a lower section of the structural member, an upper section of the structural member is provided with the reactor, and components inside the switch core body are electrically connected through the connecting member.

IPC Classes  ?

• H02H 9/04 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage

Abstract

An iron core-annular array multi-ring magnetosensitive current sensor and a current measurement method, the method comprising: using a first loop structure (101) to acquire a feedback current signal generated according to a first magnetic field signal generated by a primary side current; using a second loop structure (102) to measure a second magnetic field signal generated by the current of a wire in a coil; and using a digital processing unit (103) to calculate, according to the feedback current signal and the second magnetic field signal, the feature quantity that characterizes the current of the wire, and determining the current on the wire according to the feature quantity that characterizes the current of the wire.

IPC Classes  ?

• G01R 15/20 - Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices

Abstract

Provided are a metering abnormality analysis method and apparatus, a storage medium, and a computer device. The metering abnormality analysis method includes acquiring preliminary analysis data analyzed by a source-end system and determining at least one data filtering rule based on the preliminary analysis data (101); filtering the monitoring data of the source-end system based on the data filtering rule to obtain target metering abnormality data (102); comparing and analyzing the target metering abnormality data with preconfigured abnormal case data and determining at least one target case data from the abnormal case data (103); and performing multidimensional cluster analysis on the target metering abnormality data to obtain the aggregation level of the target metering abnormality data in multiple data dimensions and analyzing the cause of metering abnormality based on the target case data and the aggregation level (104).

IPC Classes  ?

• G06Q 30/018 - Certifying business or products
• G06Q 50/06 - Energy or water supply

Abstract

A measurement anomaly analysis method and apparatus, a storage medium, and a computer device. The measurement anomaly analysis method comprises: acquiring first-order analysis data analyzed by a source-end system and, on the basis of the first-order analysis data, determining at least one data filtering rule (101); on the basis of the data filtering rule, performing a filtering operation on monitoring data of the source-end system to obtain target measurement anomaly data (102); performing contrastive analysis on the target measurement anomaly data and pre-configured anomaly case data to determine at least one piece of target case data from among the anomaly case data (103); and performing multi-dimensional clustering analysis on the target measurement anomaly data so as to obtain the degrees of aggregation of the target measurement anomaly data in a plurality of data dimensions and, on the basis of the target case data and the degrees of aggregation, analyzing a measurement anomaly cause (104).

IPC Classes  ?

• G06F 18/25 - Fusion techniques
• G06F 18/2321 - Non-hierarchical techniques using statistics or function optimisation, e.g. modelling of probability density functions
• G06F 18/10 - Pre-processingData cleansing
• G06F 18/28 - Determining representative reference patterns, e.g. by averaging or distortingGenerating dictionaries
• G06F 18/241 - Classification techniques relating to the classification model, e.g. parametric or non-parametric approaches
• G06Q 50/06 - Energy or water supply

Abstract

A power transmission tower climbing device (100) and a climbing working robot (500), the power transmission tower climbing device comprising: a movement assembly (1), comprising a rotation arm mechanism (11) having a plurality of rotational degrees of freedom, two ends of the rotation arm mechanism each being provided with a clamping jaw mechanism (12) adapted to clamp a power transmission tower, the rotation arm mechanism being adapted to drive the clamping jaw mechanisms to rotate in the horizontal direction and the vertical direction for climbing and walking, and the rotation arm mechanism being provided with an installation interface adapted to assembly of a working mechanism (501); and a control system (2) in communication connection with the movement assembly, the control system being adapted to control the movement assembly to perform a climbing action and cross an obstacle. The tower climbing device can adapt to complex structure environments on power transmission towers, is adapted to perform aerial climbing and corresponding working operations in place of human, and can improve working efficiency and reduce potential safety hazards.

IPC Classes  ?

• B62D 57/024 - Vehicles characterised by having other propulsion or other ground-engaging means than wheels or endless track, alone or in addition to wheels or endless track with ground-engaging propulsion means, e.g. walking members specially adapted for moving on inclined or vertical surfaces
• B25J 9/06 - Programme-controlled manipulators characterised by multi-articulated arms
• B25J 9/08 - Programme-controlled manipulators characterised by modular constructions
• H02G 1/02 - Methods or apparatus specially adapted for installing, maintaining, repairing, or dismantling electric cables or lines for overhead lines or cables
• E04H 12/08 - Structures made of specified materials of metal

Abstract

A method of a new energy centralized control station network based on dynamic IP can determine the occurrence frequency and the occurrence interval of the abnormal traffic, further analyze and determine the defense state of a new energy centralized control station based on this, and execute the corresponding dynamic optimization solution according to different defense states, so that the IP address and the firewall of the new energy centralized control station can be dynamically adjusted to ensure the security performance of the new energy centralized control station, reduce the risk of external intrusion, effectively resist malicious network reconnaissance such as scanning attacks and ensure the stable operation of a new energy power generation system.

IPC Classes  ?

• H04L 9/40 - Network security protocols

Abstract

Provided in the embodiments of the present disclosure are a new energy power station grid-connection adaptability analysis method and system. The new energy power station grid-connection adaptability analysis method comprises: a master dispatch station distributing computation tasks by means of an edge gateway; new energy substations receiving the computation tasks, and then asynchronously executing the computation tasks according to operation conditions; after the computation tasks are completed, each new energy substation compressing and encrypting a computation result and section information by means of the edge gateway, and returning same to the master dispatch station; and the master dispatch station executing grid-connection adaptability analysis according to the returned result. In the embodiments of the present disclosure, an existing centralized computation mode is expanded, and full use is made of computation resources at a new energy power station by means of introducing techniques related to edge computing, thereby improving the degree of fusion of multi-source data; moreover, network computing, data storage and advanced application are combined, such that various types of losses which are brought about by data transmission can be effectively reduced, thereby achieving a certain level of engineering application value.

IPC Classes  ?

• H02J 13/00 - Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the networkCircuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers

Abstract

Disclosed in the present disclosure are a direct-current converter station protection system and a control method therefor. The system comprises: a first analog quantity acquisition module used for acquiring analog quantity data in a direct-current converter station; a second analog quantity acquisition module used for acquiring analog quantity data in the direct-current converter station; a first protection device used for outputting a first protection action signal; a second protection device used for outputting a second protection action signal; a first protection exit action module used for outputting a protection action according to the first protection action signal; and a second protection exit action module used for outputting a protection action according to the second protection action signal. According to embodiments of the present disclosure, because both the first analog quantity acquisition module and the second analog quantity acquisition device are provided, when the data acquired by one of the analog quantity acquisition modules is wrong, misoperation of the direct-current converter station protection system is avoided, thereby improving the reliability of the direct-current converter station protection system.

IPC Classes  ?

• H02H 7/12 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for convertersEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for rectifiers for static converters or rectifiers
• H02H 7/122 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for convertersEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for rectifiers for static converters or rectifiers for inverters, i.e. DC/AC converters
• H02H 7/125 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for convertersEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for rectifiers for static converters or rectifiers for rectifiers
• H02H 1/00 - Details of emergency protective circuit arrangements

Abstract

An operation control method suitable for a fire extinguishing system of an extra-high voltage converter station is provided. The method includes: after an upper computer control system receives a sound-light alarm signal, an alarm position signal, and a switch position dividing signal, starting a spray range prediction analysis subsystem for a fixed fire monitor; determining, by the spray range prediction analysis subsystem for the fixed fire monitor based on an external wind direction and an external wind speed, whether a range of a fire monitor effectively covers an entire area of a converter transformer; and if yes, automatically presetting a first fire monitor to which a first compressed air foam generation subsystem belongs and a second fire monitor to which a second compressed air foam generation subsystem belongs; or if no, replacing a fire monitor with a mobile fire-fighting robot to extinguish a fire.

IPC Classes  ?

• A62C 37/44 - Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device only the sensor being in the danger zone
• A62C 3/16 - Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
• A62C 5/02 - Making of fire-extinguishing materials immediately before use of foam
• A62C 31/12 - Nozzles specially adapted for fire-extinguishing for delivering foam or atomized foam

Abstract

Disclosed are a passivation fire-extinguishing explosion-suppression system and method for a lithium battery energy storage system. The passivation fire-extinguishing explosion-suppression system includes: a fire-detection sensing device configured to locate a fire location and send a fire signal, a fire-extinguishing and anti-reignition explosion-suppression device, and a controller configured to control the turn-on or turn-off of the fire-extinguishing and anti-reignition explosion-suppression device, where the fire-extinguishing and anti-reignition explosion-suppression device is configured to quickly extinguish an open flame and prevent a battery from reignition and explosion and includes a storage apparatus configured to store a fire-extinguishing and anti-reignition explosion-suppression medium; and the fire-extinguishing and anti-reignition explosion-suppression medium is a combination of 90% to 99.8% of a lithium passivation gas and 0.2% to 10% of a halohydrocarbon gas, and the lithium passivation gas is one or a combination of two selected from nitrogen and carbon dioxide.

IPC Classes  ?

• A62C 3/16 - Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
• A62C 3/00 - Fire prevention, containment or extinguishing specially adapted for particular objects or places
• A62C 35/68 - Details, e.g. of pipes or valve systems

Abstract

A biomimetic tower climbing robot and a tower climbing method thereof are provided. The robot mainly includes a main control body module and clamping and moving mechanism modules; two ends of the main control body module are connected to one clamping and moving mechanism module through an elastic universal joint respectively, two clamping and moving mechanism modules can alternately lock and unlock an anti-fall track of an iron tower, and the main control body module alternately pushes the clamping and moving mechanism module at its upper end upwards and pulls the clamping and moving mechanism module at its lower end upwards to achieve climbing of the robot along the anti-fall track.

IPC Classes  ?

• B62D 57/024 - Vehicles characterised by having other propulsion or other ground-engaging means than wheels or endless track, alone or in addition to wheels or endless track with ground-engaging propulsion means, e.g. walking members specially adapted for moving on inclined or vertical surfaces
• B62D 57/028 - Vehicles characterised by having other propulsion or other ground-engaging means than wheels or endless track, alone or in addition to wheels or endless track with ground-engaging propulsion means, e.g. walking members having wheels and mechanical legs
• B62D 57/036 - Vehicles characterised by having other propulsion or other ground-engaging means than wheels or endless track, alone or in addition to wheels or endless track with ground-engaging propulsion means, e.g. walking members screw type, e.g. Archimedian screw

Goods & Services

Petroleum jelly for industrial purposes; oil for precision instruments; grease for arms [weapons]; gas for lighting; oil-gas; coal; belting wax; industrial wax; christmas tree candles; dust laying compositions. Agricultural machines; saw benches [parts of machines]; papermaking machines; type-setting machines [printing]; machines for the textile industry; dyeing machines; spin dryers [not heated]; food preparation machines, electromechanical; apparatus for drawing up beer under pressure; cigarette machines for industrial purposes; leather-working machines; pedal drives for sewing machines; bicycle assembling machines; potters' wheels; engraving machines; wrapping machines; crushers and grinders, electric, for household purposes; washing machines [laundry]; embossing machines; glass-working machines; electromechanical machines for chemical industry; haulage apparatus [mining]; converters for steelworks; drilling rigs, floating or non-floating; mixing machines (construction); lifts, other than ski-lifts; turbocompressors; foundry machines; feeding apparatus for engine boilers; fuel conversion apparatus for internal combustion engines; hydraulic engines and motors; aprons [parts of machines]; presses [machines for industrial purposes]; filters for cleaning cooling air, for engines; blowing machines or fans for the compression, sucking and carrying of grain; aerating pumps for aquaria; road sweeping machines, self-propelled. Computers; computer software, recorded; chronographs [time recording apparatus]; mechanisms for coin-operated apparatus; electronic tags for goods; punched card machines for offices; balances [steelyards]; compasses (measuring instruments); flashing lights [luminous signals]; electro-dynamic apparatus for the remote control of signals; juke boxes for computers; stands for photographic apparatus; automatic indicators of low pressure in vehicle tires; furniture especially made for laboratories; air analysis apparatus; apparatus and instruments for astronomy; telescopes; materials for electricity mains [wires, cables]; distribution consoles [electricity]; electrical conductors; transformers [electricity]; lighting ballasts; mechanisms for counter-operated apparatus; electrolysis apparatus for laboratory use; apparatus and installations for the production of X-rays, not for medical purposes; life buoys; alarms; spectacle frames; battery chargers; slides [photography]; decorative magnets. Lighting apparatus and installations; kitchen ranges [ovens]; cooling installations and machines; drying apparatus and installations; fireplaces (including industrial furnaces and boilers, excluding locomotive and steam engine boilers); taps; hot air bath fittings (excluding toilet utensils); disinfectant dispensers for toilets; radiators, electric; gas lighters; installations for processing nuclear fuel and nuclear moderating material. Providing insurance information; instalment loans; securities and public debt brokerage; art appraisal; real estate appraisal; brokerage; surety services; charitable fund raising; fiduciary; pawnbrokerage. Building construction supervision; factory construction; upholstery repair; heating equipment installation and repair; rebuilding machines that have been worn or partially destroyed; freezing equipment installation and repair; motor vehicle maintenance and repair; airplane maintenance and repair; film projector repair and maintenance; safe maintenance and repair; retreading of tires; furniture making [repair]; leather care, cleaning and repair; washing of linen; dry cleaning; disinfecting; fire alarm installation and repair; telephone installation and repair; artificial snow-making services. Transport; salvaging; car transport; air transport; vehicle rental; physical storage of electronically stored data or documents; rental of diving suits; water supplying; operating canal locks; parcel delivery; travel reservation; launching of satellites for others. Educational services; religious education; organization of exhibitions for cultural or educational purposes; lending library services; online publication of electronic books and journals; rental of movie projectors and accessories; providing sports facilities; animal training; operating of lotteries.

Abstract

A grounding grid conductor positioning method, comprising: acquiring induced magnetic field signals collected by a sensor array vertically arranged above a grounding grid conductor, wherein the induced magnetic field signals are generated by injecting an excitation current into the grounding grid conductor by means of an excitation source; according to the induced magnetic field signals and the excitation current, determining the magnetic flux density component parallel to the ground of the grounding grid conductor; taking the derivative of the magnetic flux density component parallel to the ground of the grounding grid conductor, determining the main peak coordinates corresponding to the magnetic flux density component, and positioning the grounding grid conductor according to the main peak coordinates. Further provided are a grounding grid conductor positioning apparatus and system, an electronic device, a computer-readable storage medium, and a computer program product.

IPC Classes  ?

• G01V 3/11 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils for detecting conductive objects, e.g. firearms, cables or pipes
• G01R 33/02 - Measuring direction or magnitude of magnetic fields or magnetic flux

Abstract

The present invention relates to a transformer area electricity theft prevention analysis method based on electricity consumption information collection. An association analysis algorithm is designed, and relationships between electricity theft phenomena and multi-dimensional electrical feature parameters are established, thereby solving classification and prediction of various electricity theft events; and electricity theft event models of the feature parameters are established on the basis of collected electricity consumption information data, so as to perform electricity theft prevention analysis, thereby reducing false negatives of electricity theft events.

IPC Classes  ?

• G06Q 10/04 - Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem"

Abstract

The present application provides a control method and apparatus for a direct-current energy consuming device, an electronic device, a storage medium, and a program product. The method comprises: obtaining a direct-current bus voltage value within a control period; calculating a direct-current bus voltage deviation according to the difference between the ratio of the direct-current bus voltage value to a direct-current bus voltage reference value and 1; and controlling the direct-current energy consuming apparatus to enter, exit, or maintain an original operating state according to a magnitude relationship between the direct-current bus voltage deviation and a preset fluctuation of the direct-current bus voltage.

IPC Classes  ?

• H02J 3/36 - Arrangements for transfer of electric power between ac networks via a high-tension dc link
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02J 3/14 - Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading

Abstract

Provided is a risk assessment method for power transmission line windage yaw flashover. The method includes determining the influence factors of power transmission line windage yaw flashover and setting risk assessment indexes according to the influence factors (S101); generating the standard cloud of the risk assessment indexes according to the incident occurrence probabilities and the consequence levels of the risk assessment indexes (S103); scoring the influence factors according to the risk assessment indexes and generating the risk cloud of the risk assessment indexes according to scoring results (S105); and performing a two-dimensional similarity calculation on the risk cloud and the standard cloud to obtain two-dimensional similarity between the risk cloud and the standard cloud and determining the risk level of the power transmission line windage yaw flashover according to the two-dimensional similarity (S107).

IPC Classes  ?

• G06Q 10/0635 - Risk analysis of enterprise or organisation activities
• G06Q 10/0639 - Performance analysis of employeesPerformance analysis of enterprise or organisation operations
• G06Q 50/06 - Energy or water supply

Abstract

The present disclosure provides a blockchain-based green power certification method, apparatus, and system, to pre-process obtained basic data to obtain proof-of-existence data, certify the proof-of-existence data from a production side and a consumption side by using a certification chain and a token chain respectively, and obtain a green power attribute certificate and a green power consumption label if the certification is passed; generate a unique digital identifier for the green power attribute certificate and the green power consumption label separately based on a non-fungible token (NFT), which realizes non-interchangeability, indivisibility, and other characteristics of the certificate and the identifier; and supervise and verify a certification process by using a chain of custody, and generate a corresponding unique blockchain identifier for the certification chain, the token chain, and the chain of custody separately through multi-chain interaction, so as to realize data interaction between blockchains.

IPC Classes  ?

• G06Q 30/018 - Certifying business or products
• H04L 9/32 - Arrangements for secret or secure communicationsNetwork security protocols including means for verifying the identity or authority of a user of the system

Abstract

r* and a difference between DC voltages on electrolytic capacitors of the other two power modules. When the intermediate DC-side voltage sensor is removed, DC voltages of various modules of a converter system of a DC coupling power unit can still be balanced, and quality of a grid-connected current is not affected by a fault.

IPC Classes  ?

• H02M 7/483 - Converters with outputs that each can have more than two voltage levels

Abstract

Disclosed in the present disclosure is an intelligent outdoor combined electrical device for grid-connected and off-grid control protection of a medium-voltage microgrid, the device comprising a current transformer, a disconnector mechanism, an outdoor circuit breaker, an electric isolation drive mechanism and an outdoor jet fuse. The current transformer is installed on a leading-out end of the outdoor circuit breaker, the disconnector mechanism is connected to the current transformer, the disconnector mechanism is connected to the leading-out end of the outdoor circuit breaker by means of the current transformer, a top end on the side of the disconnector mechanism away from the current transformer is connected to a top end of the outdoor jet fuse, a bottom end on the side of the disconnector mechanism away from the current transformer is connected to a bottom end of the outdoor jet fuse, and the electric isolation drive mechanism is arranged on the bottom end of the disconnector mechanism.

IPC Classes  ?

• H01H 89/00 - Combinations of two or more different basic types of electric switches, relays, selectors and emergency protective devices, not covered by any single one of the other main groups of this subclass

Abstract

The present disclosure provides an air mixer for a compressed air foam (CAF) fire-extinguishing system. A foam concentrate and compressed air are respectively transported by a liquid inlet pipe and an air inlet pipe. When the compressed air and the foam concentrate enter a straight pipe through a first tapered pipe, they reach an outlet end of the first tapered pipe through a path narrowing due to different cross-section diameters at two ends of the first tapered pipe, and there is a compression process. Under an action of a high-pressure airflow, the foam concentrate is fully mixed. The mixed foam concentrate reaches a porous plate of the straight pipe and can be mixed secondarily. When the foam concentrate is discharged by a second tapered pipe, a flow path widens and there is a release process.

IPC Classes  ?

• A62C 31/12 - Nozzles specially adapted for fire-extinguishing for delivering foam or atomized foam
• A62C 5/02 - Making of fire-extinguishing materials immediately before use of foam
• A62C 31/28 - Accessories for delivery devices, e.g. supports

Abstract

Disclosed in the embodiments of the present application are a high-speed quantum regulation magnetic measurement method and system. The method comprises: a laser source emitting a laser to a diamond NV center, such that the diamond NV center transmits a fluorescence intensity signal; a regional frequency positioning component performing measurement to obtain the current magnetic field intensity to be measured, obtaining a preliminary positioning frequency on the basis of said current magnetic field intensity, and sending the preliminary positioning frequency to a microwave modulator; the microwave modulator expanding a frequency range by taking the preliminary positioning frequency as the center, and performing cyclic frequency sweeping by taking the expanded frequency range as a cycle; and a data collection and processing system collecting fluorescence intensity signals under different scanning frequencies, parsing the fluorescence intensity signals under different scanning frequencies to obtain frequency values at different wave troughs, and obtaining different magnetic field intensities according to the frequency values at different wave troughs and a central frequency value.

IPC Classes  ?

• G01R 33/24 - Arrangements or instruments for measuring magnetic variables involving magnetic resonance for measuring direction or magnitude of magnetic fields or magnetic flux
• G01R 33/032 - Measuring direction or magnitude of magnetic fields or magnetic flux using magneto-optic devices, e.g. Faraday

Abstract

A sound barrier system for reducing electric field distortion includes a wall unit and a sound barrier unit. The sound barrier unit includes a sound barrier plate that, from top to bottom, includes an arc-shaped part, an inclined part, and a vertical part that are integrally formed, wherein a center of a circle of the arc-shaped part points towards an interior of a power facility, the inclined part is tilted away from the power facility from top to bottom and is tangent to the arc-shaped part, and a lower end of the vertical part is arranged on a top of the wall unit. The sound barrier system further includes an energy supply pipeline, a security device, and an online monitoring device. The sound barrier system can be easily manufactured, and not only can improve an acoustic environment around a substation, but also can reduce an amplitude of an electric field.

IPC Classes  ?

• G10K 11/162 - Selection of materials
• G01H 3/12 - AmplitudePower by electric means
• H02B 1/26 - CasingsParts thereof or accessories therefor

Abstract

An imaging method and system for a residual stress in a basin insulator, and a test block preparation method. The imaging method comprises: preparing a standard industrial test sample of a basin insulator by cutting, and testing an acoustoelastic coefficient; then acquiring residual stress data of the basin insulator, acquiring sound velocity distribution of spatial point positions of the basin insulator, and finally obtaining a stress distribution cloud map of the basin insulator by calculating attribute values and coordinate data of positions under test; and performing reliability verification on the basis of the residual stress data.

IPC Classes  ?

• G01N 29/07 - Analysing solids by measuring propagation velocity or propagation time of acoustic waves
• G01N 1/28 - Preparing specimens for investigation

Abstract

A method for constructing a transverse audible noise model of a transmission corridor, a microphone support device, and an audible noise measurement apparatus. The method comprises: synchronously measuring noise separately at transmission corridor background noise measurement points (23), N transmission corridor noise measurement points (21), and M transmission corridor noise inspection measurement points (22), so that an objective function formula (1) fits to a point array constructed by a noise correction value equation DBAnnn,0); if a mean error between a noise correction value equation DBBmmm,0) meets a precision requirement, obtaining a transverse audible noise model (1) of the transmission corridor, wherein z is audible noise at a point (x, 0).

IPC Classes  ?

• G01H 17/00 - Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the other groups of this subclass
• H04R 1/02 - CasingsCabinetsMountings therein
• G01R 29/26 - Measuring noise figureMeasuring signal-to-noise ratio

Abstract

The present invention provides an FPGA-based communication network quality test method and apparatus. The method comprises: a primary test apparatus obtaining externally inputted test parameters, generating a first test data packet according to the test parameters, and wirelessly sending the first test data packet to a secondary test apparatus; the secondary test apparatus using the first test data packet to compute network quality data at a secondary device side, and according to the first test data packet and the network quality data at the secondary device side, generating a second test data packet, and returning the second test data packet to the primary test apparatus; and the primary test apparatus using the second test data packet to compute network quality data at a primary device side, and based on the network quality data at the primary device side and at the secondary device side, obtaining the quality of the communication network. The present invention achieves rapid, accurate, and real-time network quality testing, displays network performance parameters, and satisfies the requirements of network quality testing for power systems.

IPC Classes  ?

• H04W 12/02 - Protecting privacy or anonymity, e.g. protecting personally identifiable information [PII]

Abstract

2) of the samples in an aging space; and step 4: classifying the samples in advance and solving an aging state centroid of each classified population, calculating a minimum aging distance based on the position coordinates in step 3, and evaluating the aging state of the silicone rubber composite insulator.

IPC Classes  ?

• G01N 17/00 - Investigating resistance of materials to the weather, to corrosion or to light
• G01N 3/20 - Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
• G01N 3/40 - Investigating hardness or rebound hardness
• G01N 21/31 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
• G01N 33/44 - ResinsPlasticsRubberLeather

Abstract

The method includes: determining required virtual inertia based on a frequency change rate monitored at a grid connection point of a photovoltaic grid-connected system; obtaining values of indexes that affect virtual inertia provided by each virtual synchronous generator (VSG) control unit in a photovoltaic cluster of the photovoltaic grid-connected system; determining, by using a predetermined function equation, a function value corresponding to each index; and determining an allocation proportion of the required virtual inertia in each VSG control unit based on the function value corresponding to each index. A problem of difficult conversion between a plurality of kinds of performance during operation of a power system is resolved, the frequency change rate is suppressed to a certain extent, and a stable state is recovered quickly.

IPC Classes  ?

• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02J 3/28 - Arrangements for balancing the load in a network by storage of energy

Abstract

A blockchain-based transaction system for a green certificate includes an audit node, a proxy node, and an off-chain node. The proxy node is used by a power producer and a purchaser; the audit node verifies qualification information of the power producer, and send a green certificate to the power producer; the off-chain node predicts a transaction price of a next transaction; when receiving sale information of the power producer and purchase information of the purchaser, the proxy node sends the sale information, a digital signature of the power producer, the purchase information, and a digital signature of the purchaser to the off-chain node; the off-chain node matches the sale information and the purchase information, and sends successfully matched transaction information to the proxy node; the proxy node sends the successfully matched transaction information to a transaction smart contract; and the transaction smart contract performs transaction processing.

IPC Classes  ?

• G06Q 20/38 - Payment protocolsDetails thereof
• G06F 16/23 - Updating
• G06F 16/27 - Replication, distribution or synchronisation of data between databases or within a distributed database systemDistributed database system architectures therefor
• G06F 21/60 - Protecting data
• G06F 21/64 - Protecting data integrity, e.g. using checksums, certificates or signatures
• G06Q 20/40 - Authorisation, e.g. identification of payer or payee, verification of customer or shop credentialsReview and approval of payers, e.g. check of credit lines or negative lists
• G06Q 30/0201 - Market modellingMarket analysisCollecting market data
• G06Q 30/08 - Auctions
• G06Q 40/04 - Trading Exchange, e.g. stocks, commodities, derivatives or currency exchange
• G06Q 50/06 - Energy or water supply

Abstract

A power distribution network energy storage voltage regulation partition optimization method and apparatus, a medium and a device. The power distribution network energy storage voltage regulation partition optimization method comprises the following steps: performing cluster partitioning on a power distribution network according to power distribution network operation parameters (S110); and adjusting the voltage of each cluster partition by means of an energy storage device, constructing a partition optimization model for the energy storage device to adjust the voltage of the cluster partition, and obtaining a node range in which each energy storage device is responsible for voltage regulation (S120).

IPC Classes  ?

• H02J 3/32 - Arrangements for balancing the load in a network by storage of energy using batteries with converting means
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02J 3/06 - Controlling transfer of power between connected networksControlling sharing of load between connected networks
• H02J 3/16 - Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power

Abstract

The present application discloses a hardware pipeline GTP data shunting method and apparatus for a low-delay power service. The method comprises: receiving a first power service data packet from a base station; parsing the first power service data packet, to obtain a target tunnel endpoint identifier of the first power service data packet; on the basis of the target tunnel endpoint identifier, querying whether the first power service data packet satisfies a processing condition of a mobile edge computing device, to obtain a query result; executing a shunting operation corresponding to the query result on the first power service data packet, so as to send the first power service data packet to a target service terminal. The present application uses an FPGA module to analyze power service data packets sent by a base station to a mobile edge computing platform, to screen out a power service data packet that can be processed by a mobile edge computing device, so that shunting of the power service data packets is implemented, transmission delay is reduced, and service demands are satisfied; in addition, power service customization is implemented, improving the efficiency of power grid services.

IPC Classes  ?

• H04L 69/22 - Parsing or analysis of headers

Abstract

A distribution network current protection sensitivity analysis method and apparatus. The method comprises: acquiring, according to distribution network parameters, a first short-circuit current and a system short-circuit capacity when no distributed power supply is connected to a power system (S101); determining a fault short circuit ratio according to a relative relationship between a grid connection position of a distributed power supply in the power system, and a current measurement point position and a fault position (S102); when the distributed power supply uses an optimal positive sequence voltage support policy, calculating the phase of an output current of the distributed power supply according to a phase voltage of the power system, positive and negative sequence short-circuit impedance, line impedance, the magnitude of the output current of the distributed power supply, line impedance between buses, and a line impedance angle (S103); according to the first short-circuit current, the fault short circuit ratio, and the phase of the output current of the distributed power supply, determining a second short-circuit current when the distributed power supply is connected to the power system (S104); and performing evaluation of current protection sensitivity according to a current protection setting value and the second short-circuit current (S105). By means of the distribution network current protection sensitivity analysis method and apparatus, the magnitude of a short-circuit current can be calculated without an iterative calculation using a computer, thereby achieving the evaluation of current protection sensitivity.

IPC Classes  ?

• H02H 3/00 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection
• H02H 3/08 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess current

Abstract

Disclosed in embodiments of the present invention are a power distribution network simulation method, system and device, and a computer-readable storage medium. The method comprises: according to a model difference and an interaction effect between a cyber system and a physical system in a power distribution network and the scale and accuracy of multi-scenario simulation verification, performing multi-level and multi-scale platform architecture modeling to obtain a simulation platform architecture; on the simulation platform architecture, according to coupling characteristics between the physical system and the cyber system in the power distribution network, performing fusion modeling on cyber-physical simulation systems under time-varying information and non-deterministic conditions to obtain a power distribution network cyber-physical system; on the basis of the simulation platform architecture, in a concurrent fault scenario of the physical system, a communication network and the cyber system, performing real-time simulation on the power distribution network cyber-physical system to determine a fault simulation result of the power distribution network; and on the basis of the simulation platform architecture, performing reliability simulation evaluation on the power distribution network cyber-physical system by using a reliability evaluation index to determine a reliability simulation result of the power distribution network.

IPC Classes  ?

• H02J 13/00 - Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the networkCircuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
• H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks

Abstract

The embodiments of the present application relates to a power grid distribution network frame topology construction method based on a power distribution and utilization holographic data model, comprising: acquiring graphic data of a plurality of power grid devices in a power grid PMS system, converting the graphic data into topological data, and writing the topological data into a graph database; on the basis of the graph database, identifying among the plurality of power grid devices a transformer substation node and a plurality of tower nodes that have a connection relationship with the transformer substation node; determining a sag-related parameter on the basis of the distance between each two adjacent towers among the plurality of tower nodes, and constructing a sag line segment function on the basis of the sag-related parameter; and, on the basis of the sag line segment function, drawing an overhead line curve between each two adjacent towers, so as to obtain a power grid distribution network frame topological graph. Therefore, the method constructs a unified topological model by using the graph database and a three-dimensional technology, and calculates and visualizes the three-dimensional topological line sags, thereby improving the operation and maintenance management level.

IPC Classes  ?

• G06F 30/18 - Network design, e.g. design based on topological or interconnect aspects of utility systems, piping, heating ventilation air conditioning [HVAC] or cabling
• H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks
• G06F 16/23 - Updating
• G06F 16/22 - IndexingData structures thereforStorage structures
• G06F 113/04 - Power grid distribution networks

Abstract

Disclosed in embodiments of the present disclosure is an alternating current power transmission system, comprising: a converter. The converter comprises a plurality of converter valve groups, one end of each converter valve group is connected to a first alternating current system, each bridge arm of the other end of each converter valve group is connected to a winding at one side of a first transformer in series, and a winding at the other side of the first transformer is connected to a second alternating current system. According to the present disclosure, a winding at one side of a transformer is connected to each bridge arm of a converter, so that the winding can be used for simultaneously inhibiting an interphase circulating current and improving the utilization rate of an IGBT switching device in the converter, the reactance of the bridge arms of the converter is omitted while the normal work of a converter valve is ensured, and thus the impedance of the system can be reduced, and the transmission capability of the system is improved.

IPC Classes  ?

• H02M 5/04 - Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters
• H02M 5/10 - Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters using transformers
• H02M 5/293 - Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

The present disclosure relates to the technical field of integrated circuits, and particularly relates to a voltage reference generation circuit, and a chip and an electronic device. The voltage reference generation circuit comprises: a reference voltage generation circuit, which is used for generating a first reference voltage; and a voltage stabilization circuit, which comprises a voltage conversion circuit, a source-current voltage stabilization branch and a sink-current voltage stabilization branch, wherein the voltage conversion circuit is used for converting the first reference voltage into a voltage reference, converting the voltage reference into a first control voltage when the voltage reference generation circuit receives an external source current, and converting the voltage reference into a second control voltage when the voltage reference generation circuit receives an external sink current, the source-current voltage stabilization branch receives the first control voltage, and the sink-current voltage stabilization branch receives the second control voltage, so as to perform voltage stabilization on the voltage reference, thereby improving the reliability of the circuit.

IPC Classes  ?

• G05F 3/26 - Current mirrors
• G05F 1/10 - Regulating voltage or current
• G05F 1/56 - Regulating voltage or current wherein the variable actually regulated by the final control device is DC using semiconductor devices in series with the load as final control devices

Abstract

A risk evaluation method for a windage yaw flashover, comprising: determining an influence factor of a windage yaw flashover of a power transmission line, and setting a risk evaluation index according to the influence factor (S101); generating standard cloud of the risk evaluation index according to an accident occurrence probability and consequence level of the risk evaluation index (S103); scoring the influence factor according to the risk evaluation index, and generating risk cloud of the risk evaluation index according to a scoring result (S105); and performing two-dimensional proximity calculation on the risk cloud and the standard cloud to obtain two-dimensional proximity between the risk cloud and the standard cloud, and determining risk level of the windage yaw flashover of the power transmission line according to the two-dimensional proximity (S107).

IPC Classes  ?

• G06Q 10/0635 - Risk analysis of enterprise or organisation activities
• G06Q 10/0639 - Performance analysis of employeesPerformance analysis of enterprise or organisation operations
• G06Q 50/06 - Energy or water supply

Abstract

A monitoring system based on a digital converter station includes a first monitoring terminal deployed at a first-level monitoring side, a second monitoring terminal deployed at a second-level monitoring side, and a third monitoring terminal deployed at a third-level monitoring side; the monitoring terminal at each level includes a communication module, a human-machine interaction module, a device status monitoring module, a device alarm management module, a video fusion processing module, and a data transmission adjustment and control module.

IPC Classes  ?

• G06V 10/80 - Fusion, i.e. combining data from various sources at the sensor level, preprocessing level, feature extraction level or classification level
• G06V 20/52 - Surveillance or monitoring of activities, e.g. for recognising suspicious objects
• H04L 43/0829 - Packet loss
• H04L 43/0864 - Round trip delays

Abstract

A wind power forecasting error determination method, comprising: on the basis of historical data of a wind farm, acquiring data required by wind power forecasting error decoupling; in view of an actual wind farm forecasting process, dividing wind power forecasting into three operations, i.e., numerical weather prediction, a wind-electricity conversion model and prediction result correction; calculating an error caused by the prediction result correction; fitting the wind-electricity conversion model, fitting the output of the wind-electricity conversion model under real meteorological conditions, comparing the output with the output of the wind-electricity conversion model under numerical weather prediction conditions, and calculating the change in an error of the wind-electricity conversion model under different meteorological conditions; integrating a plurality of operations, and establishing a wind power error decoupling equation; and solving the equation, and calculating an error proportion.

IPC Classes  ?

• G06Q 10/04 - Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem"
• G06Q 50/06 - Energy or water supply
• G06N 3/04 - Architecture, e.g. interconnection topology
• G06N 3/08 - Learning methods

Abstract

The embodiments of the present invention belong to the technical field of communications. Provided are a data flow control method and apparatus based on single-bus information transmission, and a communication system. The data flow control method is based on a data receiving end, and comprises: detecting the state of a data buffer area of a data receiving end, wherein the state comprises the data buffer area being idle and the data buffer area being saturated; when the state of the data buffer area changes, sending an initialization signal to a data sending end; and when an initialization response signal from the data sending end is not received for more than a preset time, repeatedly sending the initialization signal; and in response to the initialization response signal from the data sending end, sequentially sending to the data sending end a write data preparation signal and the state of the data buffer area, wherein the initialization signal, the write data preparation signal and the state of the data buffer area are sent by means of a single flow control bus. By means of the embodiments of the present invention, the transmission of communication states between bus devices can be realized, and thus the loss of communication data can be effectively prevented.

IPC Classes  ?

• H04L 47/30 - Flow controlCongestion control in combination with information about buffer occupancy at either end or at transit nodes
• H04L 12/40 - Bus networks

Abstract

A method for quantifying and assessing a scheduling risk considering source load fluctuation and rescheduling, and an apparatus for quantifying and assessing a scheduling risk considering source load fluctuation and rescheduling are provided. The method includes establishing a scene set considering a new energy disturbance; establishing and solving a rescheduling optimization model considering the new energy disturbance in each scene based on a preset scheduling plan according to the scene set, so as to obtain a solving result of the rescheduling optimization model; and calculating a risk quantifying and assessing result corresponding to the preset scheduling plan according to the solving result of the rescheduling optimization model.

IPC Classes  ?

• H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks

Abstract

Disclosed in the present invention are a data sending method and apparatus, a data receiving method and apparatus, an electronic device, a chip, and a storage medium. The method comprises: after receiving a first express message and when a second express message is being sent by means of an express service interface indicated by a second interface identifier, sending a first steal control signal on the basis of first tuple information of the first express message; and according to the first steal control signal, controlling the second express message to pause sending by means of the express service interface indicated by the second interface identifier, and controlling the first express message to start sending by means of an express service interface indicated by a first interface identifier. A plurality of express service interfaces and a steal control signal carrying a steal indication and an interface identifier are designed for different levels of time delay and jitter requirements, a frame structure does not need to be changed, and the frame structure is consistent with a frame structure defined by standards, such that the probability of an opposite end not being able to receive a data stream is reduced, and the universality is improved.

IPC Classes  ?

• H04L 47/10 - Flow controlCongestion control

Abstract

A smart terminal hardware interface test system, and a test method thereof. The system comprises: a smart terminal under test, said smart terminal comprising a core MCU board (1) and an interface group under test (2); and further comprises a test apparatus, the test apparatus comprising a module interface group (3), a module interface switching control module (4), a module communication test module (5), a voltage measurement module (6), a current measurement module (7), a load control module (8) and an MCU main control module (9). The module interface switching control module (4) is electrically connected to the module interface group (3), the module communication test module (5), the voltage measurement module (6), the current measurement module (7) and the MCU main control module (9). The voltage measurement module (6), the current measurement module (7) and the load control module (8) are all electrically connected to the MCU main control module (9). The current measurement module (7) is further electrically connected to the load control module (8). The present invention has the characteristics of improving test efficiency, lowering proficiency requirements of testers, and reducing costs.

IPC Classes  ?

• H04B 17/00 - MonitoringTesting
• G01R 35/04 - Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current

Abstract

A high-frequency transformer includes: an iron core, primary windings and secondary windings, wherein the iron core is of an integrated equilateral triangle structure, the primary windings and the secondary windings are uniformly wound around three sides of the iron core, and the primary windings and/or the secondary windings are symmetrically distributed on the three sides.

IPC Classes  ?

• H01F 27/28 - CoilsWindingsConductive connections
• H01F 27/24 - Magnetic cores
• H01F 30/12 - Two-phase, three-phase or polyphase transformers

Abstract

1212122(x), and input the processed unit-side frequency signal into the frequency modulation control loop, so as to realize low-frequency oscillation suppression.

IPC Classes  ?

• H02J 3/24 - Arrangements for preventing or reducing oscillations of power in networks

Abstract

Provided in the present disclosure are a FlexE-based power communication service resource allocation method and apparatus, belonging to the technical field of communications. The method comprises: on the basis of an actual physical network, constructing an undirected graph model, the points in the undirected graph model representing physical nodes, and the sides in the undirected graph model representing physical links; and, on the basis of the undirected graph model, solving an optimization problem with the aim of minimizing the allocation of physical network resources while satisfying a slice service requirement, so as to obtain the latest use condition of the physical network resources and network topology mapping of a current network slice request. For FlexE network slice requests for different service requirements, the FlexE-based power communication service resource allocation method and apparatus provided by the present disclosure can reasonably map the slice requests to actual physical networks while meeting the slice service requirements such as the time delay bandwidth, thereby optimizing the allocation of physical network resources to the maximum extent, reducing the slice cost for tenants, and increasing the income of network providers.

IPC Classes  ?

• H04L 41/0896 - Bandwidth or capacity management, i.e. automatically increasing or decreasing capacities

Abstract

The present invention provides a calculation method and apparatus for the schedulable potential of active loads, a terminal, and a storage medium. The method comprises: respectively establishing behavior characteristic mathematical models of different active loads on the basis of the behavior characteristics of the active loads in a power distribution network, the active loads being distributed active loads; and aggregating the behavior characteristic mathematical models of the different active loads by using a Minkowski summation mode, so as to obtain active load schedulable potential data that uses an intelligent building as a unit. According to an aggregation method based on a Minkowski sum, the present invention can aggregate original distributed active loads into active load schedulable potential data that uses an intelligent building as a unit, so that the behavior characteristics of the active loads can be retained, the aggregation accuracy is improved, the calculation mode is more objective, and the data characteristics are more comprehensive.

IPC Classes  ?

• G06Q 10/06 - Resources, workflows, human or project managementEnterprise or organisation planningEnterprise or organisation modelling
• G06N 3/04 - Architecture, e.g. interconnection topology

Abstract

The present application discloses a monitoring system and method based on a digital converter station. The monitoring system comprises a first monitoring terminal deployed at a first-level monitoring side, a second monitoring terminal deployed at a second-level monitoring side, and a third monitoring terminal deployed at a third-level monitoring side. The monitoring terminal at each level comprises a communication module, a human-computer interaction module, a device state monitoring module, a device alarm management module, a video fusion processing module, and a data transmission regulation and control module. The video fusion processing modules are respectively deployed at the monitoring terminals at all levels, so that the monitoring terminals at all levels can locally respond to monitoring retrieval requests of users at all levels; a station end does not need to completely respond to the monitoring retrieval requests of the users at all the levels, a user can directly view a video fusion picture from the local and does not need to retrieve the video fusion picture from a remote end, and therefore, when network bandwidth resources are limited, network delay can be effectively reduced, the real-time performance of video picture display is improved, and the use effect of a video fusion application and user experience are improved.

IPC Classes  ?

• H04N 7/18 - Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast

Abstract

Provided in the embodiments of the present disclosure are a microgrid system, a control method therefor, an electronic device, a storage medium and a program product. The microgrid system comprises: an energy router, a distributed-energy-source power supply system and an electric load group. The energy router comprises an alternating-current bus, a power supply interface group, a load switch group, a communication system and an energy management system. The distributed-energy-source power supply system is electrically connected to the alternating-current bus by means of the power supply interface group. The electric load group is electrically connected to the alternating-current bus by means of the load switch group. The communication system is configured to perform, according to the current operating situation of the microgrid system and a preset energy management policy, communication between the energy router and the distributed-energy-source power supply system as well as the electric load group. The energy management system is configured to control, according to the current operating situation of the microgrid system and the preset energy management policy, the connection mode of the distributed-energy-source power supply system, so as to allow the microgrid system to enter a target power supply mode.

IPC Classes  ?

• H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks

Abstract

An inverter impedance measurement method and apparatus, a terminal device and a storage medium, which relate to the technical field of impedance measurement. The method comprises: acquiring a disturbance voltage frequency domain signal and a response current frequency domain signal when a disturbance voltage of a first disturbance frequency is injected to an inverter, and acquiring a disturbance voltage frequency domain signal and a response current frequency domain signal when a disturbance voltage of a second disturbance frequency is injected to the inverter (101); determining a first disturbance voltage signal, a first response current signal, a second disturbance voltage signal and a second response current signal according to the disturbance voltage frequency domain signals and the response current frequency domain signals (102); determining a first impedance of the first disturbance frequency and a second impedance of the second disturbance frequency according to the disturbance voltage signals and the response current signals (103); and determining the impedance of a preset frequency according to the first impedance and the second impedance (104). The precision of inverter impedance measurement can be improved, and the accuracy of subsequent dynamic characteristic analysis of the inverter can thus be improved.

IPC Classes  ?

• G01R 27/02 - Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
• G01R 27/08 - Measuring resistance by measuring both voltage and current

Abstract

A transient stress suppression method and apparatus for a grid forming type converter. The method comprises: on the basis of a direct-current voltage deviation and an alternating-current voltage deviation of a grid forming type converter, respectively generating a phase instruction and a voltage amplitude instruction; and, on the basis of the phase instruction and the amplitude instruction, generating a sine pulse width modulation signal used for controlling the grid forming type converter. The technical solution can ensure system stability of grid forming type converters, and can effectively cope with the problems of direct-current voltage limit exceeding and system instantaneous over-currents possibly occurring during transient response processes.

IPC Classes  ?

• H02J 3/36 - Arrangements for transfer of electric power between ac networks via a high-tension dc link
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers

Abstract

A method and apparatus for predicting the service life of a CMOS device, an electronic device, and a medium. The method for predicting the service life of a CMOS device comprises: acquiring a time series sample data set of an electrical parameter of a CMOS device under an accelerated stress test, the time series sample data set comprising time series sample data of a degradation amount of the electrical parameter characterizing the service life of the CMOS device (S101); obtaining a training set on the basis of the time series sample data set (S102); training a time series model by using the training set to obtain a service life prediction model (S103); and predicting failure time of the CMOS device by using the service life prediction model (S104). The method reduces the time cost of determining the service life of a CMOS device by performing a complete accelerated stress test on the CMOS device in the prior art, improves the product quality inspection efficiency, shortens the production period of CMOS devices, and solves the problem of low production efficiency of CMOS devices.

IPC Classes  ?

• G01R 31/26 - Testing of individual semiconductor devices
• G06N 3/04 - Architecture, e.g. interconnection topology

Abstract

The present disclosure relates to the field of power semiconductors, and particularly discloses a super-junction semiconductor device and a manufacturing method therefor. The manufacturing method comprises: etching a first predetermined region of a wafer by means of a deep trench etching process to obtain at least one Ai deep trench, and filling the Ai deep trench with a first epitaxial layer having a doping concentration of NAi to form an i-th-layer epitaxial pillar of a first conductive type; etching a second predetermined region of the wafer by means of the deep trench etching process to obtain at least one Di deep trench, and filling the Di deep trench with a second epitaxial layer having a doping concentration of NDi to form an i-th-layer epitaxial pillar of a second conductive type; and repeating the steps above to manufacture a super-junction structure in the wafer. The technical solution solves the void problem caused by the conventional single epitaxial filling of deep trenches. The method is mainly used for manufacturing a super-junction semiconductor device.

IPC Classes  ?

• H01L 21/336 - Field-effect transistors with an insulated gate
• H01L 29/06 - Semiconductor bodies characterised by the shapes, relative sizes, or dispositions of the semiconductor regions
• H01L 29/78 - Field-effect transistors with field effect produced by an insulated gate

Abstract

The present disclosure belongs to the technical field of optimization scheduling of power distribution networks. Provided are a consistency algorithm-based cloud-edge collaboration regulation and control method and system for a power distribution area group. The method comprises: a leader of each area group sending, to a cloud server, a group power deviation and regulation and control cost information of the corresponding area group; for each area group, the leader of the current area group receiving regulation and control amount information sent by the cloud server; according to the regulation and control amount information, calculating the current cost micro-increment rate of each area in the current area group, and determining a regulation and control power corresponding to the current cost micro-increment rate; and in response to the regulation and control power meeting a preset constraint condition, determining the regulation and control power of the area in the current area group according to the current cost micro-increment rate. In this way, a power grid environment change can be adapted, and the reliability and real-time performance of scheduling of a power distribution network are improved.

IPC Classes  ?

• H02J 13/00 - Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the networkCircuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
• H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks
• H02J 3/48 - Controlling the sharing of the in-phase component

Abstract

The present application is suitable for the technical field of photovoltaic inverter planning and design, and provides a configuration optimization method for a microgrid distributed photovoltaic power generation system and a terminal device. The method comprises: acquiring photovoltaic power generation data of a preset fixed number of years of a region where a photovoltaic power generation system is located; on the basis of the capacity ratio and power limit value data of each individual in a differential evolution algorithm population, acquiring the output power and net increased power generation capacity of a photovoltaic inverter in the photovoltaic power generation system; on the basis of the photovoltaic power generation data and the output power of the photovoltaic inverter, calculating the junction temperature of an IGBT by using an XGBoost machine learning algorithm, and estimating the service life of the IGBT; calculating a fitness value of each individual on the basis of the service life of the IGBT and the net increased power generation capacity, and then outputting an optimal capacity ratio and power limit value of the photovoltaic power generation system by using a differential evolution algorithm. The method of the present application can reduce the time consumed for calculating the junction temperature of the IGBT, simplify the reliability evaluation process of the photovoltaic inverter, and determine the optimal capacity ratio and power limit value of the photovoltaic power generation system while the service life of the IGBT and the net increased power generation capacity are taken into account.

IPC Classes  ?

• G06F 30/27 - Design optimisation, verification or simulation using machine learning, e.g. artificial intelligence, neural networks, support vector machines [SVM] or training a model

Abstract

Provided are an overhead line detection method and system based on a cable inspection robot. The cable inspection robot is suspended on the overhead line. An imaging unit and a laser emission unit are disposed at the front end of the cable inspection robot. The imaging unit is at a first angle to the overhead line. The laser emission unit is at a second angle to the overhead line. The overhead line detection method includes the following steps: controlling the laser emission unit to emit N groups of parallel laser beams to the overhead line to form N parallel laser lines on the overhead line; controlling the imaging unit to shoot the overhead line and the N parallel laser lines to acquire a target detection image; performing image recognition on the target detection image to acquire N laser line diameters corresponding to the N parallel laser lines on the overhead line; and comparing the N laser line diameters with theoretical line diameters at corresponding positions to determine whether the overhead line is abnormal. Therefore, the accuracy and efficiency of the inspection can be greatly improved, and the inspection risk can be reduced.

IPC Classes  ?

• H02G 1/02 - Methods or apparatus specially adapted for installing, maintaining, repairing, or dismantling electric cables or lines for overhead lines or cables
• G01N 21/88 - Investigating the presence of flaws, defects or contamination

Abstract

A hierarchical health index evaluation method for an intelligent substation includes: obtaining a basic health index of a device based on static information and dynamic information of the device; obtaining a device correlation based on a communication connection relationship between the device and another device, and correcting the basic health index of the device based on the device correlation to obtain a health index of the device; obtaining a layer-based health index of a layer based on a device health index and a device importance weight of the layer; obtaining a whole-station health index of an intelligent substation based on a layer-based health index of each layer and a sum of device importance weights of each layer; and regulating the intelligent substation based on a health index of each device in the intelligent substation, the layer-based health index of each layer, and the whole-station health index.

IPC Classes  ?

• G06F 21/57 - Certifying or maintaining trusted computer platforms, e.g. secure boots or power-downs, version controls, system software checks, secure updates or assessing vulnerabilities
• H04L 43/50 - Testing arrangements

Abstract

An automatic fire-extinguishing system and method for a cable tunnel. The system includes an inspection robot, a positioning robot, and guide rails fixed on an inner top of the tunnel, where the inspection robot and the positioning robot are connected to the guide rails respectively, and the positioning robot is arranged in a groove of the inspection robot and able to be moved by the inspection robot along the guide rails; and the positioning robot is able to independently enter and exit an inner space of the inspection robot along the guide rails, and the positioning robot is configured to control a built-in fire-extinguishing mechanism to extinguish fire at a position with a preset distance from a fire source. Both fire-fighting medium docking and fire extinguishing are realized; a quick access to a battery is realized and fire-extinguishing inspection efficiency of a cable tunnel is improved.

IPC Classes  ?

• A62C 3/16 - Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
• A62C 37/36 - Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
• A62C 27/00 - Fire-fighting land vehicles

Abstract

rgrgrr* and a difference value between the DC voltages on electrolytic capacitors in the other two power modules (1, 3). According to the modulation method, when the DC voltage sensor of the electrolytic capacitor in the intermediate power module (2) is removed, the DC voltages of the modules in the DC coupled converter (5) can still be balanced, and the quality of the grid-connected current is not affected by the fault, so that normal operation can be achieved under the reduction of DC voltage sensors.

IPC Classes  ?

• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
• H02M 1/32 - Means for protecting converters other than by automatic disconnection
• H02M 1/088 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02J 3/36 - Arrangements for transfer of electric power between ac networks via a high-tension dc link

Abstract

A dual-magnetic-field energy acquisition sensor and a boost converter thereof, and a control method and apparatus. The boost converter comprises a capacitor and two boost circuits, wherein each boost circuit comprises a magnetic-field energy acquisition source, an input inductor, a switching transistor, and a diode which are connected in sequence; the two boost circuits are connected in parallel and then connected to one end of the capacitor and an external load, and the other end of the capacitor is grounded. By means of two magnetic-field energy acquisition sources, the collection requirements for electromagnetic energy in a wider frequency band range can be satisfied, and the collection efficiency for the electromagnetic energy is improved, thereby solving the problem that the energy collection efficiency is low when the electromagnetic energy is low.

IPC Classes  ?

• H02J 50/10 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling

Abstract

Disclosed in embodiments of the present disclosure are a peak-to-average power ratio reduction method and apparatus, an electronic device, and a readable storage medium. The peak-to-average power ratio reduction method comprises: an input data acquisition step: acquiring input data of a specific dimension in a specific resource element of a specific multi-carrier symbol; and a data rotation step: for the resource element position and the specific dimension of the input data, performing phase rotation on the input data to obtain data after the phase rotation, thereby reducing the peak-to-average power ratio, not introducing nonlinear distortion and out-of-band interference as much as possible, and not causing reduction of signal quality.

IPC Classes  ?

• H04L 27/26 - Systems using multi-frequency codes

Abstract

A multi-sensor data fusion-based self-powered online monitoring system for a transmission line includes a plurality of detection nodes, an optical communication receiving and demodulation module, and a data processing module. The detection nodes each include a vibration energy harvesting module, a sensing module, and an optical communication modulation and transmitting module. The detection node uses a triboelectric nanogenerator (TENG) to convert and harvest energy, uses the sensing module to acquire a plurality of types of sensing data, and uses the optical communication modulation and transmitting module to modulate and transmit the sensing data. The optical communication receiving and demodulation module correspondingly receives and demodulates the sensing data, and transmits the sensing data to the data processing module for processing. The processing includes using a weighted least square method to fuse homogeneous sensing data and using a fuzzy comprehensive evaluation method to analyze heterogeneous sensing data.

IPC Classes  ?

• H04B 10/11 - Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
• H02N 99/00 - Subject matter not provided for in other groups of this subclass
• H04B 10/50 - Transmitters
• H04B 10/80 - Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups , e.g. optical power feeding or optical transmission through water

Abstract

Embodiments of the present disclosure provides a client-side energy measurement data exchange protocol remote testing method and a system. The method comprises: once a test server has received an execute test request sent by test monitoring equipment, generating a unique token code corresponding to the present test, sending said token code to an object being tested by means of the test monitoring equipment, synchronizing, by the test server, a test scheme and test cases with the test monitoring equipment according to the token code, and initiating and executing a client-side energy measurement data exchange protocol remote test; providing simulated data and external stimuli to the object being tested by means of the test monitoring equipment, updating test cases in real time according to test steps and current test feedback of the object being tested, and synchronizing same with the test monitoring equipment, thereby implementing protocol conformance testing and protocol interoperability testing of the object being tested.

IPC Classes  ?

• H04L 43/18 - Protocol analysers
• H04L 43/10 - Active monitoring, e.g. heartbeat, ping or trace-route
• H04L 43/50 - Testing arrangements

Abstract

Embodiments of the present disclosure provide a method and apparatus for evaluating the inertia and primary frequency modulation capability of power supply nodes, and a device. The method comprises: injecting a small power disturbance into a power system, and calculating the impedance at each power supply node in the power system; drawing an amplitude response curve corresponding to a frequency response transfer function according to the impedance at the power supply node and the frequency response transfer function formula at the power supply node; and calculating the inertia coefficient and the primary frequency modulation capability coefficient of each power supply node according to each amplitude response curve. In this way, the inertia coefficient and the primary frequency modulation capability coefficient at each power supply node can be calculated in real time on the basis of impedance while ensuring the normal operation of the power system, such that the inertia and the primary frequency modulation capability of the power supply nodes can be quickly and accurately evaluated.

IPC Classes  ?

• H02J 3/24 - Arrangements for preventing or reducing oscillations of power in networks

Abstract

Embodiments of the present invention relate to the technical field of local power distribution network self-recovery. Disclosed are a regional power distribution network self-recovery device joint test system and method. The regional power distribution network self-recovery device joint test system comprises a simulation control main unit and a plurality of simulation test terminals, wherein the plurality of simulation test terminals are in one-to-one correspondence to a plurality of self-recovery devices, the simulation control main unit is communicatively connected to the plurality of simulation test terminals, and the simulation test terminals are electrically connected to the corresponding self-recovery devices; the simulation control main unit is used for establishing a distribution network simulation model, exchanging test information with the plurality of simulation test terminals, and performing test result analysis, wherein the test information comprises fault configuration information, first simulation feedback information, and second simulation feedback information; and the simulation test terminals are used for exchanging the test information with the simulation control main unit, converting the fault configuration information, sending the converted fault configuration information to the self-recovery devices, receiving the first simulation feedback information uploaded by the self-recovery devices, and serving as simulation circuit breakers to simulate the switching logic of a primary system of a power distribution network and to generate the second simulation feedback information.

IPC Classes  ?

• H02J 13/00 - Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the networkCircuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
• G01R 31/00 - Arrangements for testing electric propertiesArrangements for locating electric faultsArrangements for electrical testing characterised by what is being tested not provided for elsewhere

Abstract

The present application provides an inter-turn protection method and system for a converter transformer. In the method and system, three-phase currents before and after initiating inter-turn protection are collected at a valve side and at a grid side of a converter transformer, and a three-phase differential current, a three-phase differential current variation, and a fundamental phasor of the sum of positive and negative sequences of the three-phase differential current variation of the converter transformer are calculated according to the three-phase current; then, criterion results for a differential protection criterion, a second harmonic blocking criterion, a waveform identification open criterion, and a sequence differential current open criterion are determined according to the calculated parameter values; and last, whether inter-turn protection actuates is determined according to the criterion results. When a developmental inter-turn short circuit fault occurs in a converter transformer and differential protection can not rapidly identify and remove the fault due to the time for second harmonic blocking being relatively long, the present method and system quickly perform inter-turn protection action output, and protection sensitivity and action speed during an inter-turn fault are greatly improved.

IPC Classes  ?

• H02H 7/04 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers

Abstract

A cable inspection robot-based overhead line testing method and system. The system comprises a first control module (100), a second control module (200), an image recognition module (300), and an anomaly detection module (400). A cable inspection robot is suspended on an overhead line, and is provided with a camera unit and a laser emission unit at the front end, an angle between the camera unit and the overhead line being a first angle, and an angle between the laser emission unit and the overhead line being a second angle. The testing method comprises the following steps: controlling the laser emission unit to emit N groups of parallel laser beams to the overhead line so as to form N parallel laser lines; controlling the camera unit to shoot the overhead line and the N parallel laser lines so as to acquire a target test image; performing image recognition to acquire N laser line paths on the overhead line; and separately comparing same with theoretical line paths of corresponding positions so as to determine whether the overhead line is abnormal. Therefore, the inspection accuracy and efficiency are improved, and inspection risks are reduced.

IPC Classes  ?

• G01N 21/88 - Investigating the presence of flaws, defects or contamination

Abstract

Provided in the embodiments of the present application is a flexible power transformer. The flexible power transformer comprises a main transformer and a converter apparatus, wherein the main transformer comprises a primary-side winding and a plurality of secondary-side windings; the converter apparatus is connected in series between a tail end of the primary-side winding of the main transformer and a tail end of any secondary-side winding of the main transformer, or the converter apparatus is connected in series between tail ends of any two secondary-side windings of the main transformer; and the converter apparatus is used for adjusting the voltage of each winding of the main transformer by means of adjusting the output voltage of the converter apparatus. In the embodiments of the present application, the function of adjusting the voltage of each winding of a transformer can be realized without changing the turn ratio of the transformer. Moreover, a voltage-source-type converter is combined with a power transformer, so as to realize rapid, continuous, accurate and flexible adjustment of the output electrical quantity of the transformer by means of a converter with a relatively small capacity.

IPC Classes  ?

• H02J 3/12 - Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
• H02J 3/06 - Controlling transfer of power between connected networksControlling sharing of load between connected networks
• H02M 5/12 - Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters using transformers for conversion of voltage or current amplitude only

Abstract

A document classification method includes: obtaining a document; extracting document keywords and a document abstract from the document; determining, according to the document keywords and the document abstract, a first classification label of the document; receiving a second classification label of the document, the second classification label being determined according to the document keywords, the document abstract, and the first classification label; obtaining a classification efficiency value of the documents, the classification efficiency value indicating a confidence level of the second classification label; and determining the second classification label as a final classification label of the document if the classification efficiency value is greater than or equal to a first threshold. The document classification method described above may improve the speed of document classification by computer, thereby improving the efficiency of document classification.

IPC Classes  ?

• G06F 16/35 - ClusteringClassification
• G06F 16/33 - Querying