Abstract

Provided an intermittent characteristic-based demand-side resource coordination control method and system. The method includes: receiving a control request, where the control request is used for requesting control of demand-side resources having an intermittent characteristic; determining a target total control quantity of demand-side resources; determining a coordination strategy of multiple demand-side resources and an action quantity of each of the multiple demand-side resources; and performing coordinated control on the multiple demand-side resources based on the target total control quantity of demand-side resources, the coordination strategy, and the action quantity of each of the multiple demand-side resources.

IPC Classes  ?

• H02J 3/24 - Arrangements for preventing or reducing oscillations of power in networks
• H02J 3/46 - Controlling the sharing of output between the generators, converters, or transformers

Abstract

The invention discloses an elastic electrical insulator fully-encapsulated dry-type transformer winding structure and a manufacturing method thereof. The dry-type transformer winding structure comprises a central winding column, a plurality of coils which are sequentially connected in series is sleeved on the periphery of the central winding column, the plurality of coils form a winding unit of the transformer, the coils being formed by winding magnetic wires; a plurality of intermediate cushion blocks are arranged between adjacent coils; two ends of the winding unit are respectively provided with a plurality of end cushion blocks, the end cushion blocks being arranged along the periphery of the central winding column; the end cushion blocks, coils, intermediate cushion blocks and central winding column surface are encapsulated by an elastic electrical insulator. According to the invention, the manufacturing difficulty of a winding unit can be simplified, heat dissipation is optimized, and costs are reduced. At the same time, the elastic electrical insulator is effectively filled and fused, and the transformer has good temperature resistance and noise reduction qualities.

IPC Classes  ?

• H01F 27/30 - Fastening or clamping coils, windings, or parts thereof togetherFastening or mounting coils or windings on core, casing, or other support
• H01F 27/08 - CoolingVentilating
• H01F 27/33 - Arrangements for noise damping
• H01F 41/06 - Coil winding

Abstract

Disclosed are a control method and system for the inertia of an offshore wind power grid-connected system. The control method comprises: when a fault occurs in an AC power grid at a receiving end, on the basis of the frequency of the AC power grid at the receiving end, determining a DC side voltage reference value of a grid side converter of a VSC-HVDC system in an offshore wind power grid-connected system; using double closed-loop control technology of the grid side converter to control the DC side voltage of the grid side converter to the DC side voltage reference value of the grid side converter; on the basis of the DC side voltage of a wind power farm side converter of the VSC-HVDC system, determining an AC side frequency reference value of the wind power farm side converter, wherein the DC side voltage of the wind power farm side converter is equal to the DC side voltage of the grid side converter; using double closed-loop control technology of the wind power farm side converter to control the AC side frequency of the wind power farm side converter to the AC side frequency reference value of the wind power farm side converter; and using the controlled AC side frequency of the wind power farm side converter to control the active power output of a wind power farm in the offshore wind power grid-connected system.

IPC Classes  ?

• H02J 3/24 - Arrangements for preventing or reducing oscillations of power in networks
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers

Abstract

A dispatching method and apparatus for an integrated energy system, a medium and an electronic device. Said method comprises: collecting, as training samples, historical data of a new energy power generation power, an electric load and a natural gas load, and acquiring an optimization target of an integrated energy system (S110); determining a state variable, an action variable, a reward function, a discount factor and a memory capacity as training elements of a deep reinforcement learning model on the basis of the training samples and the optimization target (S120); and iterating the deep reinforcement learning model on the basis of the training elements to generate a dispatching model (S130).

IPC Classes  ?

• G06Q 10/06 - Resources, workflows, human or project managementEnterprise or organisation planningEnterprise or organisation modelling
• G06Q 50/06 - Energy or water supply

Abstract

Disclosed are a relay protection system risk assessment and fault positioning method and apparatus, and a device and a medium. The method comprises: dividing multiple fault events of a relay protection system into different hierarchical events, and constructing a fault tree of the relay protection system according to the different hierarchical events; converting the different hierarchical events of the fault tree into different nodes of an initial Bayesian network; giving multiple states to each node of the initial Bayesian network, and constructing a target Bayesian network according to a pre-constructed Bayesian network conditional probability distribution table and the multiple states of each node; determining the probability of an intermediate node in different states and the probability of a leaf node in a target Bayesian network in different states according to the prior probability of a root node in different states to complete risk assessment of the relay protection system; and determining the posterior probability of the state of the root node by using the Bayesian network according to the state of the leaf node, and completing fault positioning of the relay protection system.

IPC Classes  ?

• G06F 11/07 - Responding to the occurrence of a fault, e.g. fault tolerance
• G06N 7/00 - Computing arrangements based on specific mathematical models

Abstract

A pole-mounted switch apparatus. The pole-mounted switch apparatus comprises a box body, two groups of sleeve tubes, an insulation body, an isolation switch and a circuit breaker. Partial structures of the two groups of sleeve tubes are respectively inserted into two sides of the box body, wherein a first measurement line passes through one group of sleeve tubes, and a second measurement line passes through the other group of sleeve tubes; the insulation body is arranged in the box body and divides the interior of the box body into a first chamber, a second chamber, a third chamber and a fourth chamber, and a first conductor is arranged in the first chamber and is connected to the first measurement line; a stationary contact of the isolation switch is located in the first chamber and is in contact with the first conductor, a movable contact of the isolation switch is located in the fourth chamber, and a conductive rod of the isolation switch is exposed in an area between the first chamber and the fourth chamber; and the circuit breaker is arranged in the third chamber and is connected to the second measurement line by means of the second conductor.

IPC Classes  ?

• H01H 9/26 - Interlocking, locking, or latching mechanisms for interlocking two or more switches
• H02H 7/22 - 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 distribution gear, e.g. bus-bar systemsEmergency 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 switching devices
• H02B 5/02 - Non-enclosed substationsSubstations with enclosed and non-enclosed equipment mounted on pole, e.g. pole transformer substation
• H02B 1/46 - BoxesParts thereof or accessories therefor
• H02B 13/035 - Gas-insulated switchgear

Abstract

The present application relates to an angled-steel tower bolt fastening robot, said robot comprising: a robot frame, an intermediate mechanism arranged on the same side as the robot frame, and a clamping mechanism; the clamping mechanism is connected to the robot frame by means of the intermediate mechanism; the robot framework comprises a rail, front foot and rear foot motion crossbars arranged perpendicular to the rail, and a middle motion crossbar perpendicular to the track and located between the front foot and rear foot motion crossbars; the front foot motion crossbar, the rear foot motion crossbar, and the middle motion crossbar move up and down along a guide rail; a fastening tool is fixed on the middle motion crossbar; the intermediate mechanism comprises an annular guide rail and a tilting electric push rod connected to the annular guide rail; the annular guide rail is connected vertically to the axis of the robot frame; the robot frame rotates along the annular guide rail; supported by the support assembly, the tilting electric push rod drives the robot frame away from or toward the angled steel; the clamping mechanism has an open/close structure, and is arranged to clamp or release the angled steel.

IPC Classes  ?

• B25J 11/00 - Manipulators not otherwise provided for
• B23P 19/06 - Screw or nut setting or loosening machines
• 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

Abstract

Disclosed are a method, system and device for constructing a power service simulation environment, and a storage medium. The method for constructing a power service simulation environment comprises: according to a requirement for a power service simulation environment and from an image model library, calling an image model corresponding to the requirement, so as to establish a simulation image model instance of a power service; according to a mapping relationship between an image model and a language model and in correspondence with the image model in the simulation image model instance, calling a language model, which corresponds to the image model, in a language model library, so as to generate a simulation language model instance; translating the language model in the simulation language model instance into a system configuration file by means of semantic translation; according to the system configuration file, generating an abstract component model under a constraint condition; obtaining, by means of functional analysis, software and hardware of a power underlying device corresponding to the abstract component model; and configuring the software and hardware of the power underlying device according to the requirement for the power service simulation environment, so as to construct the power service simulation environment.

IPC Classes  ?

• H04L 29/08 - Transmission control procedure, e.g. data link level control procedure

Abstract

Provided in the present application is an apparatus for high-potential online energy extraction in a high-voltage overhead line. The apparatus comprises: a suspension potential conductor; a conductor connector, which is connected on the suspension potential conductor; a discharge electrode, which is connected to the conductor connector by means of an insulation member; and a high-potential conductor, which has a discharge gap with the discharge electrode. The high-potential conductor is connected on the high-voltage overhead line, and a phase voltage from the high-voltage overhead line is used to form a discharge passage at the high-potential conductor and the discharge electrode, so as to supply power, on the basis of000 power generated by the discharge passage, to an external load connected to the discharge electrode and the conductor connector. In the present application, a discharge gap exists between the discharge electrode and the high-potential conductor, and the potential difference between the two causes air gap breakdown of the discharge gap, so that a charge induced on the discharge electrode is transferred to generate a wide-band current, and the wide-band current is transmitted to an external load by passing through the conductor connector and the discharge electrode, so as to supply power to the external load.

IPC Classes  ?

• H02J 5/00 - Circuit arrangements for transfer of electric power between ac networks and dc networks

Abstract

A symmetrical vacuum bubble load-balancing transition circuit apparatus, and a control method, which apparatus and method belong to the technical field of tap switches. The apparatus comprises transfer switches (Z1, Z2), circulating vacuum circuit breakers (RV1, RV2), a load current vacuum circuit breaker (MV), main switches (MC1, MC2), and a transition resistor (R).

IPC Classes  ?

• H01F 29/04 - Variable transformers or inductances not covered by group with tappings on coil or windingVariable transformers or inductances not covered by group with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
• H01F 27/42 - Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors or choke coils
• H01H 9/00 - Details of switching devices, not covered by groups
• H01H 9/54 - Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere

Abstract

An eddy-current tuned mass damper for vibration control of a steel-tube lightning rod. The eddy-current tuned mass damper for vibration control of the steel-tube lightning rod comprises: a top fixing unit (2), a bottom fixing unit (3), and multiple vibration reduction assemblies (4) provided between the top fixing unit (2) and the bottom fixing unit (3); the top fixing unit (2) is configured to be sleeved on the top end of a lightning rod (1) and connected to a dustproof cover at the top of the lightning rod (1); a magnetic damping structure is provided in each vibration reduction assembly (4); when the lightning rod (1) vibrates, the magnetic damping structure is configured to convert vibration energy into an eddy current.

IPC Classes  ?

• F16F 15/03 - Suppression of vibrations of non-rotating, e.g. reciprocating, systemsSuppression of vibrations of rotating systems by use of members not moving with the rotating system using electromagnetic means
• H01T 19/04 - Devices providing for corona discharge having pointed electrodes

Abstract

A wire hanging fitting (3) and a T-shaped composite insulating cross arm with the wire hanging fitting (3). The wire hanging fitting (3) comprises a first end and a second end, wherein the second end is provided with a fixing groove (31); an opening of the fixing groove (31) is configured away from the first end; the fixing groove (31) is configured to fix a wire (8); an anti-slipping structure (32) is arranged on an outer wall at the opening of the fixing groove (31); and the anti-slipping structure (32) is configured to prevent a tying string (9) for tying the wire (8) from slipping off. The T-shaped composite insulating cross arm comprises the wire hanging fitting (3).

IPC Classes  ?

• H02G 7/08 - Members clamped to the supporting wire or to the line or cable
• H02G 7/10 - Flexible members or lashings wrapped around both the supporting wire and the line or cable

Abstract

A three-phase coaxial high-temperature superconducting cable through-current test system and transient and steady-state through-current test method. The test system comprises an electric induction voltage regulator (1), a low-voltage high-current generator (2), a closing circuit breaker (4), a current transformer (5), an isolating switch (6), a three-phase coaxial superconducting cable system (7), a grounding circuit breaker (8), a simulated load (9), a grounding switch (10), an up-current console (3), and a comprehensive measurement and control protection device (11). Also provided is a three-phase coaxial superconducting cable steady-state and transient through-current test method, which ensures that the whole test system may carry out long-term high-current steady-state through-current testing and transient high-current transient through-current testing of three-phase coaxial high-temperature superconducting cables, and carry out synchronous monitoring of cable operating parameters. The present system and method have significant advantages such as safety, reliability, wide applicability and parameter controllability.

IPC Classes  ?

• G01R 31/08 - Locating faults in cables, transmission lines, or networks
• 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
• G01K 7/18 - Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer
• G01K 11/32 - Measuring temperature based on physical or chemical changes not covered by group , , , or using changes in transmittance, scattering or luminescence in optical fibres

Abstract

A hydraulic control valve, a hydraulic operating mechanism using the hydraulic control valve, and a circuit breaker. The hydraulic control valve comprises a valve body (1), which is internally provided with a valve cavity (3), and a constant high-pressure oil port (4), a control oil port (5) and a constant low-pressure oil port (6) which communicate with the valve cavity (3) are sequentially disposed on the valve body (1) along a linear direction. The hydraulic control valve is further provided with a valve core (9); a straight section of equal diameter is provided on an inner wall of the valve cavity (3) between the constant high-pressure oil port (4) and the constant low-pressure oil port (6); a sealing ring (10) is provided on at least one of the outer peripheral surface of the valve core (9) and on an inner wall of the the straight section of equal diameter, so as to achieve sliding sealing cooperation between the valve core (9) and the straight section of equal diameter. A first limit position and a second limit position are provided on a reciprocating sliding stroke of the valve core (9); when located in the first limit position, the valve core (9) is located between the constant high-pressure oil port (4) and the control oil port (5), and the constant low-pressure oil port (6) communicates with the control oil port (5); and when located in the second limit position, the valve core (9) is located between the constant low-pressure oil port (6) and the control oil port (5), and the constant high-pressure oil port (4) communicates with the control oil port (5). Requirements for the position of the valve core (9) after moving into position are not too strict, and a certain position deviation is permitted, thus reducing the difficulty of processing and assembling.

IPC Classes  ?

• F16K 11/065 - Multiple-way valves, e.g. mixing valvesPipe fittings incorporating such valvesArrangement of valves and flow lines specially adapted for mixing fluid with all movable sealing faces moving as one unit comprising only sliding valves with linearly sliding closure members
• F15B 13/02 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
• H01H 71/24 - Electromagnetic mechanisms

Abstract

A method, system and apparatus for calling an adjustable load to participate in a demand response. The method for calling an adjustable load to participate in a demand response comprises: on the basis of a regulation scenario of a demand response and acquired information of an adjustable load, selecting a regulable device set from a pre-constructed load characteristic library (step 1); and selecting, from the device set, a device satisfying a response power deviation to participate in the demand response (step 2), wherein the load characteristic library is constructed on the basis of labels configured for the adjustable load, and the labels comprise label types that are set according to a working scenario of the adjustable load, and information of the adjustable load participating in the demand response.

IPC Classes  ?

• G06Q 10/06 - Resources, workflows, human or project managementEnterprise or organisation planningEnterprise or organisation modelling
• G06Q 50/06 - Energy or water supply

Abstract

Disclosed is a vertical seismic isolation system. The vertical seismic isolation system comprises: a plurality of anti-sway mechanisms, a vertical seismic isolation bearing, and a vertical dampener. The vertical seismic isolation bearing has an elastic structure, and both the vertical seismic isolation bearing and the vertical dampener are configured to be located between a protected object and the ground. Each anti-sway mechanism comprises a vertical column and a connecting member. The vertical column is configured to be fixed to the ground and located within a preset range from the protected object. The connecting member is slidably disposed on the vertical column, and the connecting member is configured to be connected to the protected object.

IPC Classes  ?

• E04B 1/98 - Protection against other undesired influences or dangers against vibrations or shocksProtection against other undesired influences or dangers against mechanical destruction, e.g. by air-raids
• E04H 9/02 - Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
• E02D 31/08 - Protective arrangements for foundations or foundation structuresGround foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against transmission of vibrations or movements in the foundation soil
• F16F 15/02 - Suppression of vibrations of non-rotating, e.g. reciprocating, systemsSuppression of vibrations of rotating systems by use of members not moving with the rotating system

Abstract

A method for controlling a voltage source-type wind turbine unit, a main control system, an electronic device, and a storage medium. The method comprises: determining an operation mode of a wind turbine unit on the basis of an electric power grid frequency; if the wind turbine unit is operating in a current source operation mode, determining a power generator torque output command and an operation mode of the wind turbine unit on the basis of a power generator torque command output by a variable-speed variable-pitch control loop and a power generator torque command required by an electric power grid frequency active support control loop to output a support frequency; and if the wind turbine unit is operating in a voltage source operation mode, determining a power generator torque output command and an operation mode of the wind turbine unit on the basis of a power generator torque command output by the variable-speed variable-pitch control loop and a power generator torque required for virtual synchronization.

IPC Classes  ?

• F03D 7/02 - Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
• F03D 17/00 - Monitoring or testing of wind motors, e.g. diagnostics
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers

Abstract

A transmission line breeze vibration sensing device and method, and a transmission line breeze vibration early warning device and method. The transmission line breeze vibration sensing device comprises: a wire clamp (1) of a hollow cylindrical structure, a vibration sensor (7), a plurality of pressure sensors (6) and a data processing device, wherein the wire clamp (1) is hung on a ground wire of a transmission line; the wire clamp (1) is connected to the data processing device; the vibration sensor (7) and the plurality of pressure sensors (6) are arranged in the wire clamp (1) and are in communication connection with the data processing device; and the data processing device is configured to process the ground wire surface pressure collected by each of the pressure sensors (6) and the ground wire vibration acceleration collected by the vibration sensor (7) to obtain a ground wire pneumatic force, a ground wire vibration displacement, a ground wire vibration frequency and a ground wire dynamic bending strain, and send same to a remote server. The sensing device implements synchronous monitoring of the sag of the ground wire and the pneumatic load of the ground wire to provide complete basic data for providing disaster early warnings regarding the breeze vibration of the ground wire of the transmission line.

IPC Classes  ?

• G01D 21/02 - Measuring two or more variables by means not covered by a single other subclass
• G01H 17/00 - Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the other groups of this subclass
• G01L 11/00 - Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group or

Abstract

Disclosed are a vacuum on-load tap-changer transition device, and a switching method for the vacuum on-load tap-changer transition device. The vacuum on-load tap-changer transition device comprises: a main changeover switch S1, an auxiliary changeover switch S2, a circulating current vacuum circuit breaker RV1, a circulating current vacuum circuit breaker RV2, a load current vacuum circuit breaker MV, a transition resistor R1 and a transition resistor R2.

IPC Classes  ?

• H01H 9/00 - Details of switching devices, not covered by groups
• H01H 9/54 - Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
• H01F 29/04 - Variable transformers or inductances not covered by group with tappings on coil or windingVariable transformers or inductances not covered by group with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current

Abstract

A method and system for the coordinated control of the high-voltage ride-through of a wind turbine generator set, which method and system belong to the technical field of wind power generation control. The method for the coordinated control of the high-voltage ride-through of a wind turbine generator set comprises: performing real-time monitoring on a wind turbine generator set, so as to acquire monitoring information (S10); comparing a generator-end voltage of the wind turbine generator set with a preset voltage threshold value, and comparing the change rate of the generator-end voltage of the wind turbine generator set with a preset change rate threshold value, so as to respectively acquire comparison results (S20); and according to the comparison results, controlling a current transformer and a low-voltage electric reactor of the wind turbine generator set, so as to complete the coordinated control of the high-voltage ride-through of the wind turbine generator set (S30).

IPC Classes  ?

• H02J 3/18 - Arrangements for adjusting, eliminating or compensating reactive power in 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
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers

Abstract

A vacuum on-load tap-changer transition circuit with isolation contacts and a voltage regulation method. The transition circuit comprises: a first main contact (MC1), a second main contact (MC2), a first auxiliary vacuum contact (V1), a second auxiliary vacuum contact (V2), a main vacuum contact (V3), a first switch (Z1), a first isolation contact (G1), a second isolation contact (G2), a first transition resistor (R1) and a second transition resistor (R2); one end of the first main contact (MC1) is connected to an odd-numbered tapping position end; one end of the second main contact (MC2) is connected to an even-numbered tapping position end; one end of the first auxiliary vacuum contact (V1) is respectively connected to the odd-numbered tapping position end and the first switch (Z1), and the other end thereof is connected to one end of the first transition resistor (R1); one end of the second auxiliary vacuum contact (V2) is respectively connected to the even-numbered tapping position end and the first switch (Z1), and the other end thereof is connected to one end of the second transition resistor (R2); the first transition resistor (R1) is connected to a neutral point of a transformer by means of the first isolation contact (G1), and the second transition resistor (R2) is connected to the neutral point of the transformer by means of the second isolation contact (G2); one end of the main vacuum contact (V3) is connected to the first switch (Z1); the other end of each of the main vacuum contact (V3), the first main contact (MC1) and the second main contact (MC2) is connected to the neutral point of the transformer and configured to output load current; and in the case of a circulation cut-off task, the first auxiliary vacuum contact (V1), the second auxiliary vacuum contact (V2), the first isolation contact (G1) and the second isolation contact (G2) are switched in turn.

IPC Classes  ?

• H01F 29/04 - Variable transformers or inductances not covered by group with tappings on coil or windingVariable transformers or inductances not covered by group with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
• H01H 9/00 - Details of switching devices, not covered by groups

Abstract

An intermittent characteristic-based demand-side resource coordination control method and system. The method comprises: receiving a control request, wherein the control request is used for requesting control of demand-side resources having intermittent characteristics (S1); determining the demand-side resource target control total quantity (S2); determining a plurality of demand-side resource coordination strategies and the action amount of each of a plurality of demand-side resources (S3); and performing, on the basis of the demand-side resource target control total quantity, the coordination strategies, and the action amount of each of the plurality of demand-side resources, coordination control on the plurality of demand-side resources (S4).

IPC Classes  ?

• H02J 3/24 - Arrangements for preventing or reducing oscillations of power in networks
• H02J 3/46 - Controlling the sharing of output between the generators, converters, or transformers

Abstract

A method for identifying the composition of a bus load, and a machine-readable storage medium. The method for identifying the composition of a bus load comprises: determining bus load data and a first relationship composed of sub-line load data corresponding to the bus load data and sub-line load label quantities (S100); according to the first relationship, establishing a training set of the bus load data and the sub-line load label quantities (S200); constructing a learning model having a deep convolutional neural network structure, and training the learning model by using the training set so that, once any bus load data is inputted into the learning model, the learning model outputs a corresponding sub-line load label quantity (S300).

IPC Classes  ?

• G06Q 50/06 - Energy or water supply
• G06N 3/02 - Neural networks

Abstract

A node selection method and system under an inter-province transaction agent mode, and a storage medium. The method comprises: optimizing an inter-province power grid model into a network simplification model (01); and selecting a node in the network simplification model as a physical node for an inter-provincial agency to participate in the market (02).

IPC Classes  ?

• G06Q 10/06 - Resources, workflows, human or project managementEnterprise or organisation planningEnterprise or organisation modelling

Abstract

A decomposition method and device for a real-time simulation model of an active power distribution network. The method comprises: determining the number of networks to be obtained by pre-decomposition and pre-decomposition nodes on the basis of the number of real-time simulators and the number of switch devices in a real-time simulation model of an active power distribution network (S101); on the basis the number of networks to be obtained by pre-decomposition and the pre-decomposition nodes, pre-decomposing the real-time simulation model of an active power distribution network to obtain multiple sub-networks, and installing interfaces at the pre-decomposition nodes (S102); and allocating the sub-networks to the real-time simulators by means of the interfaces, and adjusting nodes in the sub-networks on the basis of the average resource utilization of all real-time simulators (S103).

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
• G06F 30/20 - Design optimisation, verification or simulation

Abstract

ref1ref1ref2ref1ref1ref2ref2ref2ref2 of the active power reference value of the power modifier.

IPC Classes  ?

• H02J 3/18 - Arrangements for adjusting, eliminating or compensating reactive power in networks

Abstract

A secondary frequency modulation control method and system for a distributed energy storage system. The method comprises: determining a system frequency state interval of a power system according an allowed frequency deviation range of the power system (101); determining a state interval of an energy storage system (102); establishing a reinforcement learning matrix according to the system frequency state interval and the state interval, and determining a learning rate of reinforcement learning (103); initializing the state interval (104); calculating reward values of all actions of the next moment according to an update strategy of the reinforcement learning matrix, and taking a selection action corresponding to a strategy with the maximum reward value (105); using the selection action to acquire the value of a certain element of the reinforcement learning matrix, so as to update the reinforcement learning matrix (106); and storing the reinforcement learning matrix when the reinforcement learning matrix meets a convergence condition, and controlling secondary frequency modulation of the distributed energy storage system by using the stored reinforcement learning matrix (107).

IPC Classes  ?

• H02J 3/48 - Controlling the sharing of the in-phase component
• H02J 3/28 - Arrangements for balancing the load in a network by storage of energy

Abstract

A control method and apparatus for the coordinated participation of photovoltaic power generation and energy storage in the primary frequency regulation of a power grid, the control method for the coordinated participation of photovoltaic power generation and energy storage in the primary frequency regulation of the power grid comprising: determining an active power adjustment amount required by a photovoltaic power station that comprises a centralized energy storage system to participate in the primary frequency regulation of a power grid (S101); on the basis of the active power adjustment amount required by the photovoltaic power station to participate in the primary frequency regulation of the power grid, correcting an active power reference value of the photovoltaic power station (S102); and on the basis of the corrected active power reference value of the photovoltaic power station, adjusting respective active power of a photovoltaic power generation system and the centralized energy storage system separately (S103), wherein the photovoltaic power station comprises the photovoltaic power generation system and the centralized energy storage system.

IPC Classes  ?

• H02J 3/48 - Controlling the sharing of the in-phase component

Abstract

Provided are a method and apparatus for evaluating a degree of frequency regulation urgency of a generator set, a power system and a storage medium. The method includes obtaining a power grid frequency fluctuation trend under a normal operation condition and a power grid frequency fluctuation trend under a fault condition through simulation analysis based on the proportion η of the installed capacity of each of multiple types of generator sets in a regional power grid; obtaining a degree P of frequency regulation participation of each of the multiple types of generator sets based on the power grid frequency fluctuation trends under the normal operation condition and the fault condition; and calculating a degree U of frequency regulation urgency of each of the multiple types of generator sets in a power system based on the degree P of frequency regulation participation of each of the multiple types of generator sets and the proportion η of the installed capacity of a respective type of generator set corresponding to the degree P of frequency regulation participation, and implementing frequency regulation participation of the regional power grid in the power system based on the degree U of frequency regulation urgency.

IPC Classes  ?

• H02J 3/24 - Arrangements for preventing or reducing oscillations of power in networks
• G05B 19/042 - Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
• 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

Abstract

The present application discloses an orthogonal frequency division multiplexing (OFDM)-based high-speed wireless physical layer transmission signal generation method and a system. The method comprises: determining, according to output data of a media access control (MAC) layer, object signal indication field (SIG) data, physical header (PHR) data, and physical layer service data unit (PSDU) data; processing, according to a pre-determined processing manner, the SIG data, the PHR data, and the PSDU data; separately performing constellation mapping, inserting power-controlled pilot data, and performing an inverse Fourier transform on the SIG data, the PHR data, and the PSDU data into which the pilot data has been inserted so as to convert the data into a time domain; separately adding a cyclic prefix to the SIG data, the PHR data, and the PSDU data that have been converted into the time domain so as to generate OFDM symbols separately corresponding to the SIG data, the PHR data, and the PSDU data; acquiring time-domain preamble signal data; and performing windowing processing on the time-domain preamble signal data and the OFDM symbols corresponding to the SIG data, the PHR data, and the PSDU data, so as to generate an OFDM-based frame signal entering an analog front-end.

IPC Classes  ?

• H04L 1/00 - Arrangements for detecting or preventing errors in the information received
• H04L 27/26 - Systems using multi-frequency codes

Abstract

A device and method for performing quantitative evaluation testing of a power distribution switch. The device comprises a main control station, a controller, and a sensor. The switch controller is connected to a switch under test, the sensor is connected to the switch controller, and the switch controller and the sensor are both connected to the main control station. The main control station is configured to control the switch under test to open or close by means of the switch controller. The main control station is further configured to collect waveform data by means of the sensor, to determine, according to an analysis result, a service life trend pertaining to switch characteristic parameters, and to perform testing according to a determination result.

IPC Classes  ?

• G01R 31/327 - Testing of circuit interrupters, switches or circuit-breakers

Abstract

Disclosed in the present application are a radio frequency identification chip supporting a digital communication interface, and an application method thereof. The chip comprises a digital baseband, a memory, a power consumption management module, and a pin. The digital baseband comprises: a decoding and parsing module, a state change module, an output control module, a digital interface module, and a memory interface module. The decoding and parsing module is configured to decode and parse a data code to obtain corresponding parsed data; the state change module is configured to perform a state change on the basis of a preset rule according to the parsed data obtained by the decoding and parsing module, and generate feedback data after the state change; the output control unit is configured to encodes the feedback data and sends same by means of an external antenna in a scattering mode; the data interface module is configured to establish a communication connection with an external microcontroller unit by means of a preset data interface; the power consumption management module detects information transmitted over a chip data bus, and stores the corresponding parsed data and the feedback data to the memory according to a preset rule.

IPC Classes  ?

• G06K 19/077 - Constructional details, e.g. mounting of circuits in the carrier

Abstract

A line double-end steady-state quantity distance measuring method and system based on an amplitude-comparison principle. According to the method and system, voltage values and current values of both sides of a line before and after a fault are collected (102), a voltage variable quantity and a current variable quantity of both sides of the line are calculated (103), and after a voltage phasor value and a current phasor value are determined according to the voltage variable quantity and the current variable quantity (104), the position of a short-circuit point is determined by performing iterative calculation on the voltage of the short-circuit point. The method is simple in principle, and can accurately recognize a fault point, achieving precise distance measurement of lines.

IPC Classes  ?

• G01R 31/08 - Locating faults in cables, transmission lines, or networks

Abstract

Disclosed in the present application are a current encoding method and system for pairing a circuit breaker and an electric meter. The method comprises: generating a random code in a preset encoding mode, performing a single transmission by means of a power line of a first circuit breaker, and transmitting the random code to all electric meters on the electric meter side; acquiring information parameters of a first electric meter on the electric meter side, generating a confirmation code associated with the random code, and feeding the confirmation code back to all circuit breakers on the circuit breaker side; once the confirmation code is received, generating a secondary confirmation code of the confirmation code in the preset encoding mode, performing a single transmission by means of the power line of the first circuit breaker on the circuit breaker side, and transmitting the secondary confirmation code to all electric meters on the electric meter side; and determining that the first circuit breaker on the circuit breaker side and any one of the electric meters on the electric meter side are successfully paired.

IPC Classes  ?

• G01R 31/67 - Testing the correctness of wire connections in electric apparatus or circuits
• G01R 11/02 - Constructional details

Abstract

Embodiments of the present invention relate to the technical field of power systems. Disclosed a V-f cross control-based method and a system for regulating a photovoltaic inverter. The V-f cross control-based method for regulating a photovoltaic inverter comprises: obtaining an inner ring current control link parameter of a photovoltaic inverter, and according to the inner ring current control link parameter of the photovoltaic inverter, determining a reactive current reference value and an active current reference value; and determining a root mean square value of the reactive current reference value and the active current reference value, and in the case where the root mean square value does not meet a preset photovoltaic condition, determining an active current value and a reactive current value that are dynamically allocated, and using the active current value and the reactive current value to perform cross control and regulation on the photovoltaic inverter.

IPC Classes  ?

• H02J 3/24 - Arrangements for preventing or reducing oscillations of power in 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 cloud data platform for power demand response resource census, a handheld client, a web server and method, and a storage medium , wherein the cloud data platform comprises: an aggregation analysis module, which is configured to determine a response capability of at least one electrical device associated with the power user according to the acquired power utilization device information by combining the response capability determination formula matching the power utilization device information, and make a demand response DR potential report to feedback to the handheld client based on the response capability of the at least one power utilization device; and a DR contract sending module, which is configured to send a corresponding DR contract template to the handheld client according to a received DR contract signing request.

IPC Classes  ?

• G06Q 10/06 - Resources, workflows, human or project managementEnterprise or organisation planningEnterprise or organisation modelling
• G06Q 50/06 - Energy or water supply
• G06F 16/9535 - Search customisation based on user profiles and personalisation

Abstract

A method and system for coordinately controlling a reactive voltage of a wind farm. The method and system measure the voltage of a grid-connected point of a wind farm and that of a wind generator set in the wind farm, and compares the measured values with a preset first threshold interval of normal work. When a sudden increase/decrease occurs to the voltage transient of the grid-connected point of the wind farm during normal work, optimal voltage value adjustment is performed to coordinate reactive power distribution between an SVG and the wind generator set in the wind farm. When the voltage of the grid-connected point of the wind farm and a terminal voltage go beyond the first threshold interval, the SVG and the wind generator set in the wind farm enter an emergent closed-loop control mode, and separately perform reactive powder adjustment.

IPC Classes  ?

• H02J 3/18 - Arrangements for adjusting, eliminating or compensating reactive power in networks
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02J 3/50 - Controlling the sharing of the out-of-phase component

Abstract

121e2e1e2e122) are wound on the two adjacent sides of the first iron core (C1) and the second iron core (C2). The present apparatus solves the problem of the low maximum voltage level of existing dual-stage standard apparatuses, and thereby increases the accuracy of single-stage standard apparatuses in high voltages.

IPC Classes  ?

• H01F 27/24 - Magnetic cores
• H01F 27/28 - CoilsWindingsConductive connections
• H01F 38/26 - Constructions
• H01F 41/00 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties

Abstract

Disclosed is a device for construction of a power transmission and transformation tower. The device comprises a protection frame (1), a base, a hydraulic winching machine, and a self-propelled crawler belt, wherein the hydraulic winching machine and the protection frame (1) are both located on the base, at least part of the hydraulic winching machine is arranged in the protection frame (1), and the self-propelled crawler belt is arranged on the lower side of the base.

IPC Classes  ?

• B66D 3/18 - Power-operated hoists
• B66D 1/46 - Control devices non-automatic electric
• B62D 55/26 - Ground-engaging parts or elements

Abstract

Disclosed is a modular terminal. The modular terminal comprises: a main body portion and a functional module. The main body portion comprises: a power source alternating-current sampling module, a processing and display module and a super-capacitor module, wherein the power source alternating-current sampling module is used for serving as a main power source of the modular terminal to provide electric energy; the processing and display module is connected to the power source alternating-current sampling module and is used for information processing and display; and the super-capacitor module is connected to the power source alternating-current sampling module, comprises one or more super-capacitors, and is used for serving as a backup power source of the modular terminal to provide electric energy. The functional module is detachably connected to the processing and display module by means of an interface, and is used for executing pre-determined functions after being connected to the processing and display module.

IPC Classes  ?

• G08C 19/00 - Electric signal transmission systems
• G08C 17/02 - Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link

Abstract

Provided are a wideband measurement data processing method and apparatus, an electronic device and a medium. The method comprises: acquiring wideband measurement data of a substation; carrying out preprocessing analysis on the wideband measurement data to obtain a preprocessing analysis file; carrying out diagnosis analysis on the wideband measurement data, and obtaining a substation area analysis brief report in conjunction with the preprocessing analysis file; and transmitting the wideband measurement data, the preprocessing analysis file and the substation area analysis brief report to a master scheduling station, and receiving an operation control instruction of the master scheduling station, wherein the wideband measurement data comprises a wideband measurement value, a fault wave record file and alarm information, and the wideband measurement value comprises a fundamental wave measurement value, a harmonic measurement value and an inter-harmonic measurement value.

IPC Classes  ?

• 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 disclosure provides a seismic isolation device and a seismic isolation method, wherein the seismic isolation device is used in a transformer-like device, and comprises a plurality of three-dimensional seismic isolation devices and a plurality of horizontal limiting mechanisms, wherein, the plurality of three-dimensional seismic isolation devices are evenly arranged between the transformer-like device and the foundation, each horizontal limiting mechanism is arranged on the outer side of the corresponding three-dimensional seismic isolation device, each three-dimensional seismic isolation device comprises a horizontal seismic isolation device and a vertical seismic absorber, the horizontal seismic isolation device is arranged to prevent part of horizontal seismic energy from being transferred to the transformer-like device, and the vertical seismic absorber is arranged to consume part of vertical seismic energy to be transferred to the transformer-like device.

IPC Classes  ?

• E04B 1/98 - Protection against other undesired influences or dangers against vibrations or shocksProtection against other undesired influences or dangers against mechanical destruction, e.g. by air-raids
• E02D 27/34 - Foundations for sinking or earthquake territories
• H02B 1/54 - Anti-seismic devices or installations

Abstract

A system and method for monitoring the attenuation of the performance of a photovoltaic assembly, the method comprising: on the basis of a standard test environment, acquiring the starting powers of a plurality of monitored photovoltaic assemblies; respectively mounting the plurality of monitored photovoltaic assemblies according to a plurality of set angles, and testing power data of each of the monitored photovoltaic assemblies; and calculating performance attenuation data of each of the monitored photovoltaic assemblies on the basis of the starting power and power data of each of the monitored photovoltaic assemblies.

IPC Classes  ?

• H02S 50/15 - Testing of PV devices, e.g. of PV modules or single PV cells using optical means, e.g. using electroluminescence

Abstract

Provided is a seismic protection device arranged between a transformer or an electric reactor and a foundation, and the seismic protection device comprises a first connecting plate, at least three supporting components, an installation core, and a second connecting plate. The first connecting plate and the second connecting plate are horizontally arranged, the installation core is vertically arranged between the first connecting plate and the second connecting plate and is located in the central position, the upper end face of the installation core is fixedly connected to the first connecting plate, the lower end face of the installation core is fixedly connected to the second connecting plate, the at least three supporting components are vertically arranged between the first connecting plate and the second connecting plate by surrounding the installation core, the lower end faces of the supporting components are provided with first geometric structures, the upper end faces of the supporting components are fixedly connected to the first connecting plate, second geometric structures are arranged at the joints between the upper surface of the second connecting plate and the lower end faces of the supporting components, and the second geometric structures match the first geometric structures in a slidable manner.

IPC Classes  ?

• E04B 1/98 - Protection against other undesired influences or dangers against vibrations or shocksProtection against other undesired influences or dangers against mechanical destruction, e.g. by air-raids
• E04H 9/02 - Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
• H01F 27/06 - Mounting, supporting, or suspending transformers, reactors, or choke coils
• F16M 5/00 - Engine beds, i.e. means for supporting engines or machines on foundations
• F16F 15/08 - Suppression of vibrations of non-rotating, e.g. reciprocating, systemsSuppression of vibrations of rotating systems by use of members not moving with the rotating system using elastic means with rubber springs

Abstract

A partial discharge detection sensor and a manufacturing method therefor. The partial discharge detection sensor comprises a first half-ring magnetic core member (1), and a second half-ring magnetic core member (2) disposed corresponding to the first half-ring magnetic core member (1); the first half-ring magnetic core member (1) and the second half-ring magnetic core member (2) are disposed to surround an element to be detected (3) in a circumferential direction; and the first half-ring magnetic core member (1) comprises at least two magnetic core blocks (4) connected together, or the second half-ring magnetic core member (2) comprises at least two magnetic core blocks (4) connected together, or the first half-ring magnetic core member (1) and the second half-ring magnetic core member (2) both comprise at least two magnetic core blocks (4) connected together.

IPC Classes  ?

• G01R 31/12 - Testing dielectric strength or breakdown voltage
• G01R 15/18 - Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
• G01R 1/16 - Magnets

Abstract

A same-tower multi-circuit variable time limit distance protection timing method and a device. The method comprises: acquiring an instantaneous current value at a variable time limit distance protection installation location in multiple circuits of the same tower, and acquiring a preset parameter (110); calculating a multi-circuit distance measurement result according to the preset parameter and a multi-circuit distance measurement model (120); calculating, according to the preset parameter, the multi-circuit distance measurement result, and an adaptive calculation model, a distance protection zone II action time and a final distance protection zone III action time (130); and determining a final distance protection zone II action time according to the instantaneous current value, the preset parameter, and an auxiliary cross-circuit failure decision model (140).

IPC Classes  ?

• 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

A method and a system for measuring power frequency and impulse superimposed voltage waveforms, comprising: by means of a broadband voltage divider, converting a high-voltage power frequency voltage and a superimposed impulse voltage waveform into a low-voltage signal, and respectively outputting the low-voltage signal to a high sampling rate acquisition unit and a low sampling rate acquisition unit (201); by means of an input voltage calculation module, performing calculation on the low-voltage signals received by the high sampling rate acquisition unit to acquire the peak voltage and time parameters of the impulse voltage (202); by means of a power frequency voltage calculation module, performing calculation on the low-voltage signals received by the low sampling rate acquisition unit to acquire the peak voltage and frequency parameters of the power frequency voltage (203); by means of a trigger phase calculation module, superimposing the low-voltage signals received by the high sampling rate acquisition unit and the low sampling rate acquisition unit on a time axis and, at a trigger moment, calculating a trigger phase at the position of the high-voltage power frequency voltage cycle (204).

IPC Classes  ?

• G01R 31/14 - Circuits therefor

Abstract

A method and apparatus for obtaining a peak shaving amount of a cross-regional power grid. The method comprises: obtaining peak shaving curves and intraday planned outputs of multiple units in multiple supply regions and peak shaving demand amounts of multiple demand regions (S1010); and substituting the peak shaving curves and intraday planed outputs of multiple units in multiple supply regions and the peak shaving demand amounts of multiple demand regions as well as a topological relation between the multiple supply regions and the multiple demand regions into a pre-constructed peak shaving model, and performing calculation to obtain peak shaving amounts of the multiple units in the multiple supply regions (S1020).

IPC Classes  ?

• G06Q 10/04 - Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem"
• G06Q 10/06 - Resources, workflows, human or project managementEnterprise or organisation planningEnterprise or organisation modelling
• G06Q 50/06 - Energy or water supply

Abstract

0M00sM0sM0M0s0M0M00M0MsMsMMsMM(j) of the current of the M side of the first direct-current transmission line at the moment j.

IPC Classes  ?

• 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
• G01R 19/165 - Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values

Abstract

Provided in the present application are a targeted formation method for a lithium-ion battery, and a lithium-ion battery, the method comprising the following steps: pre-determining an electric potential range for gas generation in a lithium-ion battery in a formation process; within the electric potential range for gas generation and below a preset temperature, using a current of no greater than 0.2 C to charge the lithium-ion battery; and after resting for a preset time, discharging the lithium-ion battery with a current of no greater than 0.5 C to a preset electric potential.

IPC Classes  ?

• H01M 10/44 - Methods for charging or discharging

Abstract

A drive circuit for an SiC-metal-oxide-semiconductor field-effect transistor (SiC-MOSFET), the drive circuit comprising: an isolation circuit, a current amplification module, a logic module and a protection circuit, wherein an input end of the isolation circuit is connected to an input signal, and the isolation circuit is configured to perform signal isolation on the input signal; an output end of the logic module is respectively connected to the current amplification module and the protection circuit, and the logic module is configured to logically control working states of the current amplification module and the protection circuit; an input end of the current amplification module is connected to the output end of the logic module, an output end of the current amplification module is connected to an SiC-MOSFET, and the current amplification module is configured to amplify a signal input by means of the logic module and to convert same into a drive current meeting the requirements of the SiC-MOSFET; and the protection circuit is connected to the SiC-MOSFET and is configured to prevent the occurrence of an SiC-MOSFET malfunction caused by a high voltage pulse generated between a gate electrode and a source electrode of the SiC-MOSFET, and to realize the stable turning-off of the SiC-MOSFET where the voltage of a drain electrode surges during the turning-off of the SiC-MOSFET.

IPC Classes  ?

• H03K 17/687 - 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 the devices being field-effect transistors

Abstract

A lightning arrester having external series gap and a lightning protection system. The lightning arrester comprises an arrester main component (1) and an arc-extinguishing gap structure (2) which are connected in series, wherein the arc-extinguishing gap structure (2) comprises an insulation sleeve (21), arc-extinguishing electrodes (22), and isolation air chambers (23). The multiple arc-extinguishing electrodes (22) are disposed side by side at intervals in the insulation sleeve (21), and an isolation air chamber (23) is provided between any two adjacent ones of the arc-extinguishing electrodes (22). A first end and a second end of the insulation sleeve (21) are respectively provided with a connection flange (24). Air ejection ports (25) are provided on the insulation sleeve (21), and correspond one-to-one to the isolation air chambers (23) and communicate with the same. The air ejection ports (25) expose the arc-extinguishing electrodes (22) and the isolation air chambers (23), such that multiple air gaps in series are formed between adjacent ones of the multiple arc-extinguishing electrodes (22).

IPC Classes  ?

• H01T 4/16 - Overvoltage arresters using spark gaps having a plurality of gaps arranged in series

Abstract

Disclosed are a relay protection system risk assessment and fault positioning method and apparatus, and a device and a medium. The method comprises: dividing multiple fault events of a relay protection system into different hierarchical events, and constructing a fault tree of the relay protection system according to the different hierarchical events; converting the different hierarchical events of the fault tree into different nodes of an initial Bayesian network; giving multiple states to each node of the initial Bayesian network, and constructing a target Bayesian network according to a pre-constructed Bayesian network conditional probability distribution table and the multiple states of each node; determining the probability of an intermediate node in different states and the probability of a leaf node in a target Bayesian network in different states according to the prior probability of a root node in different states to complete risk assessment of the relay protection system; and determining the posterior probability of the state of the root node by using the Bayesian network according to the state of the leaf node, and completing fault positioning of the relay protection system.

IPC Classes  ?

• G06Q 10/00 - AdministrationManagement
• G06Q 10/06 - Resources, workflows, human or project managementEnterprise or organisation planningEnterprise or organisation modelling
• G06Q 50/06 - Energy or water supply

Abstract

The present application relates to a mobile energy storage system and a control method therefor, the mobile energy storage system comprising a mobile container, a photovoltaic battery arranged on the outside of the mobile container, and an energy storage battery, an energy storage converter, an energy storage converter control circuit, an uninterruptible power supply, a storage battery, a reverse cut-off switch, a DC/DC converter and a monitoring system arranged on the inside of the mobile container.

IPC Classes  ?

• H02J 7/35 - Parallel operation in networks using both storage and other DC sources, e.g. providing buffering with light sensitive cells

Abstract

Disclosed are a method, apparatus and device for determining the number of powered-on units of an ultra-high voltage direct-current transmitting end alternating-current system, and a storage medium. The method comprises: when power disturbance occurs in an ultra-high voltage direct-current transmitting end alternating-current system, determining an equivalent impedance of a single-branch system according to parameters of current powered-on units, and calculating a transient voltage rise of a current converter according to the equivalent impedance of the single-branch system; when the calculated transient voltage rise is greater than or equal to the maximum voltage rise threshold, acquiring a transient voltage rise expression, and determining the maximum value of the equivalent impedance of the single-branch system when a transient voltage rise corresponding to the transient voltage rise expression does not exceed the maximum voltage rise threshold; calculating the maximum equivalent impedance of a thermal power unit module according to the maximum value of the equivalent impedance; and determining, according to parameters of the thermal power unit module, the minimum number of powered-on thermal power units when an equivalent impedance of the thermal power unit module does not exceed the maximum equivalent impedance of the thermal power unit module.

IPC Classes  ?

• H02J 3/36 - Arrangements for transfer of electric power between ac networks via a high-tension dc link

Abstract

A photonic crystal optical fiber and a manufacturing method therefor, comprising an optical fiber body (10), a fiber core (11) provided at the center of the optical fiber body (10), and multiple air holes (42) provided within the optical fiber body (10). Each air hole (42) is spirally shaped, and, the direction of rotation of the multiple air holes (42) is identical. On any one cross-section in the radial direction of the optical fiber body (10), the arrangement of the multiple air holes (42) is an arrangement surrounding the fiber core (11).

IPC Classes  ?

• C03B 37/027 - Fibres composed of different sorts of glass, e.g. fibre optics

Abstract

Disclosed are a method and apparatus for recognizing a large power grid critical transient stability state, and an electronic device and a storage medium. The method comprises: constituting a power generator feature quantity set and a network feature quantity set; constituting a source matrix and a network matrix; constructing differences of Gaussian scale-space of the source matrix and the network matrix; performing extremum detection on the differences of Gaussian scale-space to acquire a local extremum point corresponding to the source matrix and a local extremum point corresponding to the network matrix; removing a local extremum point with a low contrast ratio and a low principal curvature, and taking a reserved local extremum point as a key point; allocating a direction value to the key point, and generating, according to the direction value, a feature vector corresponding to the key point; determining, according to the feature vector corresponding to the key point, feature vectors of the source matrix and the network matrix; matching the feature vectors of the source matrix and the network matrix, and determining a feature quantity matching degree index; and recognizing a large power grid critical transient state, wherein when the feature quantity matching degree index approaches 0, a large power grid approaches a critical transient stability state.

IPC Classes  ?

• G06Q 10/06 - Resources, workflows, human or project managementEnterprise or organisation planningEnterprise or organisation modelling
• G06Q 50/06 - Energy or water supply
• G06K 9/62 - Methods or arrangements for recognition using electronic means

Abstract

A cleaning method and system based on operation data of a wind turbine generator set. The method comprises the following steps: obtaining the current operation data of a wind turbine generator set (S1); after normalizing the current operation data of the wind turbine generator set, calculating a distance from measured data to each pre-built wind turbine generator set theoretical operation curve in a wind turbine generator set theoretical operation curve model, and using the distance as a data deviation degree (S2); performing data cleaning on the basis of the data deviation degree and a data deviation degree threshold (S3), wherein the wind turbine generator set theoretical operation curve model is built by using behavioral parameters of the wind turbine generator set as parameters of the wind turbine generator set theoretical operation curve.

IPC Classes  ?

• F03D 17/00 - Monitoring or testing of wind motors, e.g. diagnostics
• G06F 16/215 - Improving data qualityData cleansing, e.g. de-duplication, removing invalid entries or correcting typographical errors

Abstract

Disclosed are a circuit breaker apparatus and an electric energy meter apparatus. The circuit breaker apparatus comprises: a circuit breaker (1) and a drive module (2), wherein the drive module (2) comprises an execution unit (21), a control unit (22) and a wireless communication unit (23); the execution unit (21) is connected to the circuit breaker (1), and is configured to control the turning-on and turning-off of the circuit breaker (1); the control unit (22) is respectively connected to the circuit breaker (1), the execution unit (21) and the wireless communication unit (23), and the control unit (22) is configured to receive a state signal of the circuit breaker (1), to receive, by means of the wireless communication unit (23), a control signal sent by a peripheral device (such as an electric energy meter 3), and to control the action of the execution unit (21) according to the control signal; the wireless communication unit (23) is configured to transmit and receive a wireless signal so as to realize a wireless communication connection between the peripheral device (such as the electric energy meter 3) and the circuit breaker (1); the circuit breaker (1) comprises an operating mechanism (11), a bimetallic element (13) and a conductive system (12); and the operating mechanism (11) is connected to the conductive system (12), and the operating mechanism (11) is configured to control the turning-on and turning-off of the conductive system (12).

IPC Classes  ?

• H01H 71/12 - Automatic release mechanisms with or without manual release

Abstract

Disclosed are a method and system for determining a transient power angle stability weak line of a regional power grid. The method comprises: acquiring line information of each line of a regional power grid and information of a bus connected to each line of the regional power grid (S1); calculating vulnerable factor matrices LEF of faulty lines according to different set line faults; and taking a fault, corresponding to the maximum value in the ranking of absolute values LEF' of the vulnerable factor matrices, in the vulnerable factor matrices LEF as the most serious fault, and taking a line, corresponding to the maximum value in the ranking of the absolute values LEF' of the vulnerable factor matrices, in the vulnerable factor matrices LEF as the weakest line.

IPC Classes  ?

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

Abstract

Provided herein are a method and apparatus for evaluating power generator set frequency adjustment urgency, a power system, and a storage medium. The method comprises: according to the loading capacity ratios η of multiple types of power generator sets in a regional power grid, performing simulation analysis to obtain a power grid frequency fluctuation trend under normal operating conditions and a power grid frequency fluctuation trend under malfunctioning conditions; according to the power grid frequency fluctuation trend under normal operating conditions and the power grid frequency fluctuation trend under malfunctioning conditions, acquiring the degree of participation P in frequency modulation of the multiple types of power generator sets; according the degree of participation P in frequency modulation of the multiple types of power generator sets and the loading capacity ratio η of a corresponding type of power generator set for the degree of participation P in frequency modulation of each type of power generator set, calculating to acquire the frequency modulation urgency by a power system for the multiple types of power generator sets as U; and achieving frequency modulation for participating power systems of the power grid on the basis of the frequency adjustment urgency U.

IPC Classes  ?

• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02J 3/24 - Arrangements for preventing or reducing oscillations of power in networks

Abstract

Disclosed are a power distribution network operation aided decision-making analysis system and method. The system comprises: a data layer configured to classify acquired external data and store same; a platform layer configured to establish a plurality of operation modules according to the data type of the data classified and stored by the data layer; and an application layer configured to perform risk analysis on a power distribution network and provide a risk control measure optimization solution according to the plurality of operation modules established by the platform layer and the data classified and stored by the data layer, and further configured to display operation result information of the plurality of operation modules.

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

Abstract

Disclosed by the present application is a method for detecting abnormal data of a power terminal, comprising: obtaining historical traffic data of the power terminal, and preprocessing the historical traffic data; constructing characteristics of the preprocessed historical traffic data, and outputting characteristic data; dividing the characteristic data into training set data and test set data, inputting the training set data and test set data into a neural network, and training the neural network; and inputting power terminal data which needs to be detected as input data into the trained neural network so as to obtain a detection result indicating whether the power terminal data which needs to be detected is normal or not.

IPC Classes  ?

• H04L 29/06 - Communication control; Communication processing characterised by a protocol

Abstract

An adaptive dynamic planning control method and system for a large-scale energy storage station. The method comprises: setting a structure and control target parameters of an adaptive dynamic planning control system; initializing the parameters and importing an initial state of a controlled object; calculating an original wind electricity power fluctuation rate at a current moment t and smoothing the original wind electricity power according to a change rate control strategy; calculating a smoothed wind storage power fluctuation rate, a power of an energy storage system, and a state of charge (SOC) of the energy storage system; initializing and training an evaluation module and an execution module; calculating and saving a control strategy, a smoothed wind storage power fluctuation rate, an energy storage power and a (SOC) at each moment; and outputting the control strategy at each moment, the smoothed wind storage power fluctuation rate, the energy storage power and the (SOC).

IPC Classes  ?

• F03D 7/04 - Automatic controlRegulation
• 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
• G05B 13/04 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
• F03D 9/11 - Combinations of wind motors with apparatus storing energy storing electrical energy
• F03D 9/25 - Wind motors characterised by the driven apparatus the apparatus being an electrical generator
• H02J 7/32 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from a charging set comprising a non-electric prime mover
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• G06N 3/04 - Architecture, e.g. interconnection topology
• G06N 3/08 - Learning methods

Abstract

Disclosed is a distributed energy storage scheduling method and apparatus. The method comprises: acquiring a scheduling parameter (S101); solving a preconstructed distributed energy storage scheduling model to obtain a distributed energy storage scheduling policy (S102), wherein the distributed energy storage scheduling model comprises thermal power unit operation expense and extra commuting time cost, and the scheduling parameter comprises a transportation network parameter, a transportation demand parameter, an electrical equipment parameter and a power grid parameter. By means of introducing a conversion coefficient of a transportation trend and a charging load, establishing a linear distributed energy storage scheduling model capable of easily achieving fast solution, and by invoking a solver for solving, ensuring the accuracy of solving the distributed energy storage scheduling model. A coupling effect of a transportation trend allocation manner and a distributed energy storage scheduling manner is taken into consideration, and by means of the transfer of the transportation trend spatially, the impact of the charging load on an electrical power system is alleviated, the total operating cost of the electrical power system and a transportation network is reduced, the capacity for accepting the charging load is improved, and a theoretical basis is provided for large-scale access of the charging load.

IPC Classes  ?

• H02J 3/28 - Arrangements for balancing the load in a network by storage of energy
• H02J 3/46 - Controlling the sharing of output between the generators, converters, or transformers
• H02J 3/06 - Controlling transfer of power between connected networksControlling sharing of load between connected networks

Abstract

An impulse voltage standard wave generating device and a method therefor. The device comprises a trigger circuit (V), a pulse forming circuit (II), a power source, a measuring instrument, a measurement and control module, and a temperature adjustment module. The trigger circuit (V) comprises a trigger signal generator; the pulse forming circuit (II) comprises a standard capacitor, a resistance element, and a triggering MOSFET switch (K); and the measurement and control module comprises a control module and a measurement module, wherein the control module is configured to control a direct current power source to output a direct current voltage according to different loads and voltage peaks that require output, and the measurement module communicates with an oscilloscope and is configured to measure an obtained output waveform on the load and calculate time parameters and peak parameters of the waveform.

IPC Classes  ?

• G01R 35/00 - Testing or calibrating of apparatus covered by the other groups of this subclass

Abstract

Disclosed are an energy control method and system for a cascade utilization energy storage battery of an energy storage unit. The method comprises: acquiring a power command value of a cascade utilization energy storage battery of each energy storage unit at the current moment (101); according to the power command value of the cascade utilization energy storage battery of each energy storage unit at the current moment, using a pre-established recurrent neural network model to acquire a power command value of the cascade utilization energy storage battery of each energy storage unit at the next moment (102); and adjusting the current discharge rate of the cascade utilization energy storage battery of each energy storage unit according to the power command value of the cascade utilization energy storage battery of each energy storage unit at the next moment (103). In the method, the power command value is predicted using a recurrent neural network, so that the surge in a cascade utilization battery output when a power change is too large is avoided, a response can be made in advance, and the cascade utilization battery can be used more stably. In the method, an energy control method for an energy storage system is optimized, and the energy management efficiency of the energy storage system is improved.

IPC Classes  ?

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

Abstract

Disclosed are a method and device for identifying a weak section of an electrical power grid; the method for identifying a weak section of an electrical power grid comprises: determining the types of multiple faults; determining a transient stability limit influence factor, a static stability limit influence factor, and a thermal stability limit influence factor of said multiple faults with regard to an electricity transmission section; determining the stability limit of the electricity transmission section after the multiple faults, calculating the active power sum of the electricity transmission section after the multiple faults, and calculating the load rate of the electricity transmission section and identifying the weak sections of the electrical power grid.

IPC Classes  ?

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

Abstract

Disclosed are a voltage transformer (100) and a method for metering a voltage. The voltage transformer (100) comprises: a first component (101), configured to receive a first voltage; a power output unit (1021), configured to output a second voltage; a voltage metering unit (1022), which is the voltage transformer (100) converting the second voltage into a third voltage or has a mutual inductance with the first component (101), and is configured to meter a voltage; a current transformer (1023), configured to measure a load current; and a compensate impedance (1024), which is connected in series to a winding of the voltage metering unit (1022), is connected in parallel to the current transformer (1023), and is configured to compensate for a voltage drop generated by the load current on the leakage reactance of the voltage metering unit (1022) when a user load changes, so as to compensate for an error of voltage metering.

IPC Classes  ?

• 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 are a method and a system for evaluating energy delivery capacity in a flexible DC electrical grid, the method comprising: a pre-established AC/DC hybrid system is divided into a power supplying region and a power receiving region; on the basis of the absorption limit of the power receiving region, a limiting condition and a target function of the power supplying region are defined, and an optimization model for combined operation of wind, solar, and pumped-storage hydroelectricity power is created, said optimization model comprising the limiting condition and the target function of the power supplying region; the interior point method is used to solve the optimization model to obtain a maximum delivery power of the power supplying region.

IPC Classes  ?

• H02J 5/00 - Circuit arrangements for transfer of electric power between ac networks and dc networks

Abstract

eee corresponding to the multiple shafting torsional oscillation frequencies has the same phase as ∆ω (1020), thereby suppressing subsynchronous oscillation of the generator unit. In the case that shafting torsional oscillation of the generator unit is detected by means of a supplementary excitation damping controller (SEDC), performing phase-shifting and amplification on a detected shafting torsional oscillation signal by means of the SEDC, and superimposing the shafting torsional oscillation signal subjected to phase-shifting and amplification on a control signal of an excitation regulator of the generator unit, thereby suppressing subsynchronous oscillation of the generator unit.

IPC Classes  ?

• H02J 3/24 - Arrangements for preventing or reducing oscillations of power in networks
• H02J 3/18 - Arrangements for adjusting, eliminating or compensating reactive power in networks

Abstract

The present application provides a method and system for the access between a main station and a sub-station of a power grid. The method comprises: a main station obtains a data service request of a scheduling center; the main station obtains transformer station service positioning information on the basis of the data service request, and sends the data service request to the sub-station associated with the positioning information; the main station receives data determined according to the service request and returned by the sub-station and sends the data to the scheduling center.

IPC Classes  ?

• H04L 29/08 - Transmission control procedure, e.g. data link level control procedure
• 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

Abstract

A joint junction box for electric energy metering, comprising a base (14), a base cover (15), and a pluggable tool. The base (14) is provided with a current connection terminal (17) and a voltage connection terminal (18). A detector switch (19) and a meter replacement switch (21) are provided on the current connection terminal (17), and current connection contacts (22) configured for connection to a field calibrator are further provided on the current connection terminal (17). A voltage switch (20) is provided on the voltage connection terminal (18), and voltage connection contacts (23) configured for connection to the field calibrator are further provided on the voltage connection terminal (18).

IPC Classes  ?

• G01R 11/04 - HousingsSupporting racksArrangements of terminals

Abstract

Provided are a fire extinguishing method and fire extinguishing system for a lithium ion battery, and an electronic device and a storage medium. The method comprises: acquiring, in real time, environmental parameter values inside a battery box accommodating a lithium ion battery; determining a safety level of the lithium ion battery according to the environmental parameter values and a pre-set threshold value of each environmental parameter, and sending a fire extinguishing instruction to a fire extinguishing apparatus according to a pre-set fire extinguishing control program, wherein the fire extinguishing control program is a fire extinguishing strategy corresponding to the safety level of the lithium ion battery; and enabling the fire extinguishing apparatus to perform a fire extinguishing operation according to the fire extinguishing instruction.

IPC Classes  ?

• A62C 3/16 - Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways

Abstract

An active power distribution network multi-time scale coordinated optimization scheduling method and storage medium are provided. The method includes the following steps: performing long-time scale optimization scheduling of an active power distribution network; performing short-time scale rolling optimization scheduling on the basis of MPC of the active power distribution network according to an optimization result of the long-time scale optimization scheduling of the active power distribution network. By using a model prediction control method, taking the long-time scale optimization scheduling result as a reference, and performing short-time scale rolling correction, the optimization scheduling of the active power distribution network is achieved, thereby reducing unfavorable influences of prediction precision of a distributed power supply and a low-voltage load on the optimization scheduling.

IPC Classes  ?

• H02J 3/46 - Controlling the sharing of output between the generators, converters, or transformers
• G06F 1/3209 - Monitoring remote activity, e.g. over telephone lines or network connections
• G06F 1/3228 - Monitoring task completion, e.g. by use of idle timers, stop commands or wait commands
• G06F 1/329 - Power saving characterised by the action undertaken by task scheduling
• G06F 17/16 - Matrix or vector computation
• 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 3/00 - Circuit arrangements for ac mains or ac distribution networks

Abstract

Disclosed in the present invention are a multi-CA application system and method for a security chip. The security chip is provided therein with a CA certificate application module. The CA certificate application module comprises: a certificate analysis module, a security level registry, a certificate authentication module, a certificate storage module, and a certificate use module. The certificate analysis module is configured to analyze a received CA certificate. The security level registry is configured to store permission information of multiple different security levels and security level information of a registered CA certificate. The certificate authentication module is configured to authenticate the legitimacy of a command carrying a certificate of an external device or system and to confirm the security level of the external device or system. The certificate storage module is configured to store a CA certificate passing the authentication. The certificate use module is configured to perform an operation of CA certificate application. The multi-CA application system and method for a security chip can implement multi-CA application, and when it needs to switch CA certificates in different scenarios, can implement application of different certificates according to security level information corresponding to the CA certificates.

IPC Classes  ?

• H04L 29/06 - Communication control; Communication processing characterised by a protocol
• H04L 29/08 - Transmission control procedure, e.g. data link level control procedure

Abstract

Disclosed is a pulse current measuring device. The device comprises a sensor assembly; the sensor assembly comprises a hollowed Rogowski coil for measuring an induced current; the hollowed Rogowski coil is integrally formed by using the board manufacturing process of a multilayer printed circuit board (PCB); the multilayer PCB forming the hollowed Rogowski coil has a center penetration region; wherein the multilayer PCB comprises a first coil layer and a second coil layer respectively provided with a plurality of wires; two end of each wire is are in contact with a metal conduction point penetrating the multilayer PCB; when the first coil layer and the second coil layer are in contact, the metal conduction points of the first coil layer and the second coil layer are in contact according to a rule, so that the wires of the first coil layer, the contact metal conduction points, and the wires of the second coil layer are connected in turn to form a coil.

IPC Classes  ?

• G01R 19/00 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof

Abstract

Provided is a new indoor intelligent high-voltage vacuum circuit breaker, comprising a mechanism case, a current transformer, a voltage transformer and a vacuum arc-extinguishing chamber, wherein the current transformer, the voltage transformer and the vacuum interrupter are poured together to form an enclosed pole; the current transformer, the voltage transformer and the vacuum interrupter are arranged in a triangular distribution; and a lower end of the enclosed pole is fixedly connected to the mechanism case, and an upper end of the enclosed pole is fixedly connected to the mechanism case by means of a secondary connection box.

IPC Classes  ?

• H01H 33/66 - Vacuum switches

Abstract

Embodiments of the present application disclose a locating apparatus and method for integrated circuit repair. The integrated circuit repair apparatus comprises an infrared imaging and locating unit and an integrated circuit repair unit; the infrared imaging and locating unit is configured to locate, by means of a near infrared imaging method, failure points on an integrated circuit being tested; the integrated circuit repair unit is configured to repair the circuit at said failure points.

IPC Classes  ?

• H01L 21/68 - Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereofApparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components for positioning, orientation or alignment
• H01L 21/66 - Testing or measuring during manufacture or treatment

Abstract

Disclosed in the present invention are a method for the digital physical hybrid simulation of a requirement response, and a system and storage medium, wherein the method comprises: selecting from among preset controls a control that meets a simulation requirement, configuring the control on the basis of the simulation requirement, and establishing a simulation requirement response system; performing simulation deduction on the basis of the simulation requirement and the established simulation requirement response system; and evaluating a response effect of the simulation requirement on the basis of the simulation deduction result.

IPC Classes  ?

• G05B 17/02 - Systems involving the use of models or simulators of said systems electric

Abstract

A distribution network risk identification system and method and a computer storage medium include: multi-source information data for risk identification is acquired; the multi-source information data is analyzed and processed to obtain a risk characteristic; a risk identification index is calculated on the basis of the risk characteristic, and a state of a power grid is determined according to the risk identification index; a temporal and spatial variation rule and variation trend of the risk characteristic are analyzed; a location and cause of occurrence of a risk are determined according to the temporal and spatial variation rule and variation trend of the risk characteristic; a severity of the risk is analyzed by adopting an analogue simulation manner; and the severity of the risk is assessed, and risk early warning information is issued on the basis of an assessment result.

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
• G06F 16/22 - IndexingData structures thereforStorage structures
• G05B 19/042 - Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
• G06N 3/04 - Architecture, e.g. interconnection topology
• G06Q 50/06 - Energy or water supply
• G06Q 10/06 - Resources, workflows, human or project managementEnterprise or organisation planningEnterprise or organisation modelling
• G06F 30/00 - Computer-aided design [CAD]

Abstract

Embodiments of the present invention provide a safety prevention and control method and device for a battery energy storage module. The method comprises: performing an overcharge test and a hot-box test on a battery in the battery energy storage module, and determining a rupture position of the battery at an overcharge condition and a hot-box heating condition; selecting a contact surface with the strongest heat exchange effect between the batteries according to the installation and arrangement modes of the battery in the battery energy storage module; installing a flame-retardant and heat-insulating device made of a flame-retardant and heat-insulating material at the rupture position of the battery in the battery energy storage module; and inserting the flame-retardant and heat-insulating device made of the flame-retardant and heat-insulating material on the contact surface between the batteries in the battery energy storage module.

IPC Classes  ?

• H01M 10/655 - Solid structures for heat exchange or heat conduction
• H01M 2/08 - Sealing materials
• H01M 2/10 - Mountings; Suspension devices; Shock absorbers; Transport or carrying devices; Holders

Abstract

A multi-port electric energy exchanger, comprising: a management and application module, used for implementing the control, energy management and scheduling, and autonomous running of a multi-port electric energy exchanger, coordination control, as well as coordination and optimization control with an upper energy management system; a control module, used for the access, conversion, operation, storage, and control of an information flow and a control flow; a communication module, used for providing internal and external real-time secure communication connections and information and control flow transmission to the multi-port electric energy exchanger; an electrical measurement sensing and protecting module, used for measuring, monitoring, and feeding back the operating state, electric energy quality and environment of the multi-port electric energy exchanger; an electric energy power conversion module, used for performing power conversion on an alternating current/direct current electric energy port; and the alternating current/direct current electric energy port, used for connecting an alternating/direct current feeder at a low voltage side of a substation or distribution transformer so as to receive electric energy, or used for supplying power to a distributed power supply, energy storage access, and different types of loads.

IPC Classes  ?

• H02J 3/36 - Arrangements for transfer of electric power between ac networks via a high-tension dc link

Abstract

A method and system for determining a health index of a power distribution system and a computer storage medium. The method comprises: determining an evaluation object which takes part in health index determination (S110), wherein evaluation objects comprise: power distribution equipment or a distribution network consisting of power distribution equipment and lines; collecting feature values of said evaluation object according to a feature quantity corresponding to said evaluation object (S120), wherein said feature values comprise: one or more of an attribute value, an operation status value, a connection relationship value characterizing a connection relationship, and a connection status value characterizing the connection status of said connection relationship of said evaluation object; and processing said feature values using an evaluation model adapted to said evaluation object, so as to obtain a first health index that measures the health state of said evaluation object (S130).

IPC Classes  ?

• G06Q 50/06 - Energy or water supply

Abstract

A bearing plate reinforcement device for a squeeze and expansion cast-in-place pile, comprising a steel bar cage, a first connecting member (2-1) and a second connecting member (2-2) sleeved on a main reinforcement (8) of the steel bar cage, separately, a first movable inner hoop reinforcement (1-1) connected to the first connecting member (2-1), springs (3) connected to the first movable inner hoop reinforcement (1-1), and a bearing plate reinforcement located at an outer side of the steel bar cage. The bearing plate reinforcement comprises a first reinforcement (4-1) and a second reinforcement (4-2). A first end of the first reinforcement (4-1) is rotatably connected to that of the second reinforcement (4-2). A second end of the first reinforcement (4-1) is connected to the first connecting member (2-1). A second end of the second reinforcement (4-2) is connected to the second connecting member (2-2). The second connecting member (2-2) can be fixed at a position relative to the main reinforcement (8) of the steel bar cage.

IPC Classes  ?

• E02D 13/00 - Accessories for placing or removing piles or bulkheads

Abstract

Provided by the present disclosure are a method and system for probabilistic load flow computation, comprising: acquiring basic data; on the basis of acquired basic data, computing the semi-invariant of a bus load and the semi-invariant of the output of a new-energy unit; on the basis of the semi-invariant of the bus load and the semi-invariant of the output of the new-energy unit, obtaining voltage by considering input power fluctuation and unbalanced power distribution, and obtaining the probability distribution of the branch load flow.

IPC Classes  ?

• H02J 3/06 - Controlling transfer of power between connected networksControlling sharing of load between connected networks
• G06Q 10/06 - Resources, workflows, human or project managementEnterprise or organisation planningEnterprise or organisation modelling
• G06Q 50/06 - Energy or water supply

Abstract

A single-phase-to-ground fault detection method and device based on electric field induction, and a storage medium. The method comprises: detecting changes of the electric-field intensity of a three-phase feeder in a power distribution network (101); and when the changes of the electric-field intensity of the three-phase feeder conform to preset conditions of electric-field intensity changes, determining that a single-phase-to-ground fault occurs in the power distribution network (102).

IPC Classes  ?

• G01R 31/02 - Testing of electric apparatus, lines, or components for short-circuits, discontinuities, leakage, or incorrect line connection

Abstract

Disclosed in the present invention is a fault detection method for a highly-trusted power distribution network. The method comprises: monitoring changes of electrical parameters in a power distribution network, the electrical parameters comprising at least two of a zero sequence voltage, a zero sequence current, a phase current, a phase voltage and a line voltage; and when the changes of the electrical parameters conform to preset fault determining conditions, determining that a specific type of fault occurs in the power distribution network. Also disclosed in the present invention are a fault detection device for a highly-trusted power distribution network, and a storage medium.

IPC Classes  ?

• G01R 31/08 - Locating faults in cables, transmission lines, or networks
• G01R 19/165 - Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values

Abstract

An ultra high voltage direct current disk-type suspension insulator capable of inhibiting the corrosion of metal electrodes; a separated iron cap attachment system (1) is disposed outside of an iron cap electrode (3) of the insulator, and a steel foot attachment system (2) is disposed outside of a steel foot electrode (4); the separated iron cap attachment system and the steel foot attachment system are in close contact respectively with a lower brim of a steel cap and a part of a steel foot that is exposed in the air. The separated iron cap attachment system is formed by connecting left and right parts by using a manner of convex-concave combination, and an inclined upper surface (7) transitions from a sine curve (8) to a circular curve (9), and further to a conical slot (10) and a curved slot (11) of a lower surface. A smooth surface (17) of an upper surface of the steel foot attachment system transitions to an elbow (16), which transitions to an lower arc (15), a circular protruding head (14), an equipotential surface shape (13) and an upper arc (12).

IPC Classes  ?

• H01B 17/10 - Fastening of insulator to support, to conductor, or to adjoining insulator by intermediate link
• H01B 17/46 - Means for providing an external arc-discharge path
• H01B 17/52 - Insulators or insulating bodies characterised by their form having cleaning devices

Abstract

Embodiments provide a method for constructing a future-state power grid model and device, including that: a current power grid model, an equipment power-off plan, an equipment retirement plan and an equipment addition plan are acquired; then, equipment is added according to the current power grid model, and an added equipment information set, a retired equipment information set and a powered-off equipment information set are determined according to the equipment addition plan, the equipment retirement plan and the equipment power-off plan respectively; and finally, a state of the added equipment is set to be an operating state, an initial network model of each period is formed according to a time sequence, and a future-state network model is constructed according to the added equipment information set, the retired equipment information set, the powered-off equipment information set and the initial network models. The embodiments further provide construction equipment and a storage medium.

IPC Classes  ?

• G06Q 10/04 - Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem"
• G05B 23/02 - Electric testing or monitoring
• 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 3/00 - Circuit arrangements for ac mains or ac distribution networks
• G06Q 50/06 - Energy or water supply
• G06Q 10/06 - Resources, workflows, human or project managementEnterprise or organisation planningEnterprise or organisation modelling

Abstract

A method and apparatus for controlling a photovoltaic power station, and a storage medium. The control method comprises: determining the number of first light-emitting units in the photovoltaic power station (S101), wherein the first light-emitting units are light-emitting units for leaving a reserve capacity; controlling the first light-emitting units so that same are in a hot reserve state (S102); detecting the frequency at which the photovoltaic power station works (S103); and controlling, based on the frequency, a working state of the light-emitting units in the photovoltaic power station (S104).

IPC Classes  ?

• H02S 40/30 - Electrical components

Abstract

An embodiment provides a multi-time-scale Digital/Analog (D/A) hybrid simulation system and simulation method therefor for a complex power distribution network and a computer storage medium, and is intended to solve existing problems about multi-time-scale modeling and simulation of the complex power distribution network and simulation accuracy and efficiency of the complex power distribution network. The embodiment provides a multi-time-scale D/A hybrid simulation solution for the complex power distribution network, designs a D/A hybrid interface device and a coordination mechanism, and may effectively implement multi-time-scale real-time simulation of equipment (for example, power electronic equipment including a complex topological structure and a novel control strategy) of the complex power distribution network and multi-time-scale simulation analysis on grid connection/disconnection of a distributed power supply such as a wind-driven generator, a photovoltaic power generator and a gas turbine and an electric vehicle as well as interactive influence with the power distribution network.

IPC Classes  ?

• H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks
• G05B 19/042 - Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors

Abstract

A Demand Response (DR) physical potential evaluation method for a feeder line is provided, which includes that: a load curve of a part to be identified in a load curve of a feeder line to be evaluated is acquired; a load database is created on the basis of a historical load curve of loads of predefined types; load types and total number of the loads to be identified are determined on the basis of the load curve of the part to be identified and the load database; a physical potential of the loads of each of the types is acquired according to the load types of the loads to be identified; and an overall aggregated physical potential of the loads to be identified is obtained according to the physical potential of the loads of each of the types and a number of the loads of each of the types.

IPC Classes  ?

• G05B 19/048 - MonitoringSafety
• G06Q 50/06 - Energy or water supply
• G06Q 10/06 - Resources, workflows, human or project managementEnterprise or organisation planningEnterprise or organisation modelling
• G05B 19/042 - Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
• G06F 16/11 - File system administration, e.g. details of archiving or snapshots

Abstract

A method and an apparatus for determining the distributed power supply capacity to be accessed by a feed line of a power distribution network, and a storage medium, the method comprising: determining feed line loss on the basis of load information of power distribution network feed line access nodes and circuit parameters; on the basis of the feed line loss, determining three-phase voltage change values of the feed line circuit; using a single phase having the greatest voltage change amongst the voltage change values, determining a maximum active power for distributed power supply access under voltage constraints; comparing the current of the feed line corresponding to the maximum active power with a circuit current limit, and determining the distributed power supply capacity to be accessed by the feed line; the apparatus comprises a feed line information collection unit, a voltage drop unit, a quantitative calculation unit, and a results analysis unit. The present method can be used for dispatching operation control of a distributed power supply in a power grid, and can ensure safe access to the distributed power supply and safe operation of the power grid, improving the access capacity of the power distribution network to the distributed power supply.

IPC Classes  ?

• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02J 3/46 - Controlling the sharing of output between the generators, converters, or transformers

Abstract

A current differential protection method for a self-adaptive half-wavelength line based on a time-difference method. Since an electrical distance of half-wavelength power transmission is long, after a fault occurs, there is an obvious time difference between the actuation times for protecting starting elements at two sides of a line. According to the principles of wave propagation, the position of a fault point can be determined by means of a difference between the actuation times for protecting the starting elements at the two sides of the line. By means of taking the fault point as a differential point, a current value at the differential point can be obtained according to a long line equation by means of the voltage and current at protection-mounted positions at the two sides of the line, and a differential current is then calculated.

IPC Classes  ?

• H02H 3/04 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
• H02H 3/30 - 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 difference between voltages or between currentsEmergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus using pilot wires or other signalling channel

Abstract

A concomitant impedance protection method for a half-wavelength power transmission line includes that: three-phase currents and three-phase voltages of a relay protection device mounting position at an M side and a relay protection device mounting position at an N side of the half-wavelength power transmission line are acquired respectively; it is judged whether starting amounts of an M side and an N side meet starting conditions or not; a failure point F is determined according to a time difference when the starting amounts of the M side and the N side meet the starting conditions; and a relay protection action of the half-wavelength power transmission line is started according to concomitant impedance of the half-wavelength power transmission line. According to the method, a failure may be located by a time-difference method according to a characteristic of the failure, by compensating the voltages and currents on two sides of the line to construct concomitant impedance, and failures in the region of line can be correctly reflected. Since concomitant impedance protection effectively utilizes two-terminal electrical information, the fault can be quickly and reliably operated in the line region, misoperation on the failures out of the line region can be avoided, and the protection has relatively higher sensitivity.

IPC Classes  ?

• G01R 31/08 - Locating faults in cables, transmission lines, or networks
• 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
• H02H 7/22 - 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 distribution gear, e.g. bus-bar systemsEmergency 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 switching devices
• G01R 19/25 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques

Abstract

The present application provides a device for testing partial discharge performance of an insulated bolt, comprising: a support assembly; a measuring bucket assembly with the bottom opened and the top being provided with a first seal cover; an electrode assembly; and a test piece assembly, wherein the measuring bucket assembly is connected to the support assembly and is configured to accommodate the electrode assembly and the test piece assembly; the test piece assembly and the electrode assembly are arranged at the top and bottom inside the measuring bucket assembly in parallel; the test piece assembly is connected to the side wall of the measuring bucket assembly and is configured to hold an insulated bolt to be tested; and the electrode assembly is connected to the side wall of the measuring bucket assembly and is configured to be penetrated through by the insulated bolt to be tested and perform a partial discharge performance test on the insulated bolt to be tested.

IPC Classes  ?

• G01R 31/12 - Testing dielectric strength or breakdown voltage
• G01R 31/16 - Construction of testing vesselsElectrodes therefor

Abstract

Describe are an OPGW single wire torsional fatigue test method, apparatus and storage medium. The method includes: a preset torsional angle and preset cycle number of torsions of an OPGW single wire are acquired (S1); forward and backward torsional forces are sequentially and alternately applied to the OPGW single wire according to the preset torsional angle (S2); when a number of application times of the applied torsional forces reaches a preset cycle number of torsions, torsional force application to the OPGW single wire is stopped (S3). According to the test method, a bidirectional torsional fatigue test on the OPGW single wire may be made by sequentially and alternately applying the forward and backward torsional forces to the OPGW single wire, so that reliability of a test result and test efficiency are improved. In addition, a torsional force loading device is controlled by a control device of the test apparatus in the disclosure to make the bidirectional torsional fatigue test on the OPGW single wire, meanwhile, a unidirectional torsion test and a tensile test may further be made on it, and the apparatus is easy to operate and diversified in function.

IPC Classes  ?

• G01N 3/38 - Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by electromagnetic means
• G01N 3/02 - Investigating strength properties of solid materials by application of mechanical stress Details
• G01N 3/08 - Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
• G01M 1/00 - Testing static or dynamic balance of machines or structures
• G01M 11/08 - Testing mechanical properties

Abstract

A method for identifying a pattern of a load cycle includes: performing statistics on a daily load of a system based on smart meter data; generating a curve of the daily load of the system according to the statistics on the daily load of the system; acquiring a result of clustering curves of loads of typical days by applying shape-based time sequence clustering analysis using the curve of the daily load of the system; and identifying a pattern of a load cycle according to the result of clustering the curves of the loads of the typical days.

IPC Classes  ?

• H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks
• G05B 13/04 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
• 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
• 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
• G06Q 30/02 - MarketingPrice estimation or determinationFundraising
• G06Q 10/06 - Resources, workflows, human or project managementEnterprise or organisation planningEnterprise or organisation modelling

Abstract

A construction method and apparatus for a futuristic power grid model. The method comprises: acquiring a current power grid model, an equipment power-cut plan, an equipment decommissioning plan, and an equipment addition plan (S101); adding equipment according to the current power grid model, and respectively determining, according to the equipment addition plan, the equipment decommissioning plan and the equipment power-cut plan, an added equipment information set, a decommissioned equipment information set, and a power-cut equipment information set (S102); and setting the state of the added equipment to be a running state, forming an initial network model of each time period according to a timing sequence, and constructing the futuristic network model according to the added equipment information set, the decommissioned equipment information set, the power-cut equipment information set and the initial network model (S103). The futuristic power grid model further comprises a construction equipment and a storage medium.

IPC Classes  ?

• G06Q 10/06 - Resources, workflows, human or project managementEnterprise or organisation planningEnterprise or organisation modelling
• H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks