According to an aspect of the present disclosure, a system-level low voltage ride-through (LVRT) control system for a renewable power plant (RPP) connecting to a weak grid is provided. The system includes a voltage boundary vector trajectory model that captures geometric relationships of system-side responses to determine voltage controllable boundaries. The system includes a discrete and clustering matrix-based calculation algorithm that computes optimal current commands within the constructed boundaries.
H02J 3/16 - Circuits pour réseaux principaux ou de distribution, à courant alternatif pour règler la tension dans des réseaux à courant alternatif par changement d'une caractéristique de la charge du réseau par réglage de puissance réactive
H02J 3/50 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs contrôlant la répartition de puissance entre les générateurs, convertisseurs ou transformateurs contrôlant la répartition de la composante déphasée
A pilot transient protection method and system based on an oscillation frequency, and a device are provided, which relate to the field of line protection. An oscillating component and a power frequency component are separated in a short time window by determining an oscillating characteristic after a fault occurs in a line system, to distinguish the fault based on a relative relation between the oscillating component and the power frequency component and an energy magnitude of the power frequency component. A reliable action when an internal fault occurs is mostly achieved in case of ensuring no mal-operation when an external fault occurs. Therefore, a protection action speed can be effectively increased, and protection reliability is improved. In addition, a requirement for an algorithm is not high, engineering feasibility is very strong, and an application prospect is extensive.
H02H 7/26 - Protection sectionnelle de systèmes de câbles ou de lignes, p. ex. pour déconnecter une section dans laquelle un court-circuit, un défaut à la terre, ou une décharge d'arc se sont produits
G06F 17/13 - Opérations mathématiques complexes pour la résolution d'équations d'équations différentielles
G06F 17/14 - Transformations de Fourier, de Walsh ou transformations d'espace analogues
3.
METHOD FOR COORDINATED DISPATCH OF HYBRID ENERGY STORAGE SYSTEMS TO ADAPT TO PEAK LOADS IN EXTREME SCENARIOS, AND DEVICE
Provided are a method for coordinated dispatch of hybrid energy storage systems to adapt to peak loads in extreme scenarios, and a device. The method includes: generating an extreme scenario set; generating an uncertainty set of extreme scenarios; generating an aggregated model for a hybrid energy storage power station; constructing an intra-region robust optimization model for wind-photovoltaic-thermal-energy storage based on the aggregated model for the hybrid energy storage power station and the uncertainty set of extreme scenarios, and solving the intra-region robust optimization model for wind-photovoltaic-thermal-energy storage using a Black-winged Kite Algorithm (BKA) to obtain a charging and discharging power of the hybrid energy storage power station; and generating an internal coordinated dispatch plan for the hybrid energy storage power station using a niche-based gradient-directed evolution algorithm and a dispatch plan prediction model according to the charging and discharging power of the hybrid energy storage power station.
H02J 3/28 - Dispositions pour l'équilibrage de charge dans un réseau par emmagasinage d'énergie
G06N 3/0442 - Réseaux récurrents, p. ex. réseaux de Hopfield caractérisés par la présence de mémoire ou de portes, p. ex. mémoire longue à court terme [LSTM] ou unités récurrentes à porte [GRU]
Provided are a method for zonal joint peak shaving dispatch considering a day-ahead operation security domain, a device, a medium, and a product. The method includes: solving a dimensionality-reduced overall day-ahead dispatch model to obtain an overall day-ahead dispatch plan; constructing a day-ahead operation security domain based on the overall day-ahead dispatch plan and local loads of zones, determining upward regulation capabilities and downward regulation capabilities under different unit operating points within the day-ahead operation security domain, and performing clustering and screening to obtain zonal dispatch capabilities; determining a zonal day-ahead dispatch plan for each zone based on the overall day-ahead dispatch plan; constructing and solving a peak shaving demand allocation model to obtain a zonal peak shaving demand for each zone; and inputting the zonal day-ahead dispatch plan and the zonal peak shaving demand into a zonal plan correction model, to obtain a corrected zonal day-ahead dispatch plan.
G06Q 10/04 - Prévision ou optimisation spécialement adaptées à des fins administratives ou de gestion, p. ex. programmation linéaire ou "problème d’optimisation des stocks"
5.
METHOD FOR GENERATING INSTALLED CAPACITY OF POWER SYSTEM, DEVICE, MEDIUM, AND PRODUCT
Provided are a method for generating an installed capacity of a power system, a device, a medium, and a product. The method includes: acquiring an expected upper limit of a one-time investment coefficient and an expected lower limit of a new energy consumption rate for a target power system; determining an installed capacity of the target power system by using a power system installed capacity generation model. The installed capacity is defined by an installed capacity upper bound and an installed capacity lower bound, and the power system installed capacity generation model is obtained by training a Convolutional Neural Network (CNN)-Bidirectional Long Short-Term Memory (BiLSTM)-Bidirectional Gated Recurrent Unit (BiGRU) neural network model using a training dataset. The training dataset is established using a multi-objective coronavirus disease optimization algorithm and a wave search algorithm. The CNN-BiLSTM-BiGRU neural network model includes a CNN, a BiLSTM neural network, and a BiGRU connected sequentially.
H02J 3/00 - Circuits pour réseaux principaux ou de distribution, à courant alternatif
H02J 3/28 - Dispositions pour l'équilibrage de charge dans un réseau par emmagasinage d'énergie
H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs
6.
METHOD FOR REGULATING WIND-PHOTOVOLTAIC-STORAGE POWER STATION BASED ON ELECTRICITY, GREEN CERTIFICATE, AND CARBON PRICE PREDICTION, DEVICE, MEDIUM, AND PRODUCT
Provided are a method for regulating a wind-photovoltaic-storage power station based on electricity, green certificate, and carbon price prediction, a device, a medium, and a product. The method includes: inputting acquired historical price data into a price prediction model, and outputting a predicted price; determining a deviation vector of price data based on the historical price data and the predicted price, and generating an uncertainty set of the predicted price by using a multi-kernel-based one-class support vector machine algorithm; classifying the uncertainty set of the predicted price by using a neural network classifier, to obtain multiple types of price scenarios; solving, based on predicted prices under the multiple types of price scenarios, a joint clearing model by using a Pied Kingfisher Optimization (PKO) algorithm, to obtain an operation strategy for the wind-photovoltaic-storage power station; and regulating the wind-photovoltaic-storage power station based on the operation strategy for the wind-photovoltaic-storage power station.
G06N 3/0442 - Réseaux récurrents, p. ex. réseaux de Hopfield caractérisés par la présence de mémoire ou de portes, p. ex. mémoire longue à court terme [LSTM] ou unités récurrentes à porte [GRU]
The present disclosure relates to a control method for an energy storage converter. The method includes: determining a current fault component; determining a voltage fault component; determining a fault component of a positive-sequence current of the energy storage converter in a dq coordinate system of the new energy converter; determining a fault component of a current in a dq coordinate system of the energy storage converter; determining dq-axis currents of the energy storage converter according to the fault component of the current in the dq coordinate system of the energy storage converter and a pre-fault current of the energy storage converter; and controlling the energy storage converter to output current according to the dq-axis currents of the energy storage converter, so as to reduce an impact of the fault.
Provided are a method for power production simulation and configuration optimization based on numerical simulation, a device, and a product. The method includes: constructing an investment cost evolution model according to relevant historical data and future planning data; constructing a capacity evolution sequence generation model according to investment-cost-per-unit-capacity evolution prediction data output by the investment cost evolution model; generating multiple operating scenarios of a power system according to the relevant historical data; constructing a time-series production simulation model of the power system containing hydrogen long-duration energy storage according to a given capacity evolution sequence output by the capacity evolution sequence generation model and the multiple operating scenarios; constructing a data-model hybrid-driven model; constructing a low-carbon evolution path simulation model of the power system; and obtaining a power system low-carbon evolution path considering hydrogen long-duration energy storage according to the low-carbon evolution path simulation model of the power system.
G06F 30/27 - Optimisation, vérification ou simulation de l’objet conçu utilisant l’apprentissage automatique, p. ex. l’intelligence artificielle, les réseaux neuronaux, les machines à support de vecteur [MSV] ou l’apprentissage d’un modèle
G06Q 40/06 - Gestion de biensPlanification ou analyse financières
9.
FAULT MEASUREMENT IMPEDANCE CALCULATION METHOD AND DEVICE FOR HYBRID GRID-FOLLOWING/GRID-FORMING WIND POWER SYSTEM
The present disclosure provides a fault measurement impedance calculation method and device for a hybrid grid-following/grid-forming wind power system. The method comprises: acquiring characteristics of a grid-following converter and a grid-forming converter, and corresponding low-voltage ride-through control strategies; establishing an equivalent circuit corresponding to a fault state; performing simplified analysis on a hybrid wind power system to obtain an equivalent network diagram; obtaining a branch circuit diagram under individual action of each power excitation; obtaining short-circuit currents and grid-connected point voltages on two sides of the system corresponding to the individual action of each power excitation; performing superimposition to obtain a total short-circuit current and a total grid-connected point voltage at the two sides of the hybrid wind power system; and obtaining a measurement impedance at a protection installation point on a new energy side. In the method, a measurement impedance value at a protection installation point of a hybrid wind power system after a fault occurs can be accurately calculated, so that the setting calculation of distance protection is ensured, so as to accurately reflect fault characteristic information of a hybrid AC system, thereby providing a basis for the distance protection applicability research of the hybrid wind power system, and thus ensuring the safe and stable operation of new energy systems.
H02J 3/50 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs contrôlant la répartition de puissance entre les générateurs, convertisseurs ou transformateurs contrôlant la répartition de la composante déphasée
H02J 3/48 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs contrôlant la répartition de puissance entre les générateurs, convertisseurs ou transformateurs contrôlant la répartition de la composante en phase
H02J 3/16 - Circuits pour réseaux principaux ou de distribution, à courant alternatif pour règler la tension dans des réseaux à courant alternatif par changement d'une caractéristique de la charge du réseau par réglage de puissance réactive
G01R 27/08 - Mesure de la résistance par mesure à la fois de la tension et de l'intensité
10.
METHOD FOR ANALYZING SAFETY AND STABILITY OF NEW-ENERGY POWER SYSTEM ON BASIS OF LYAPUNOV FUNCTION
Disclosed in the present disclosure is a method for analyzing the safety and stability of a new-energy power system on the basis of a Lyapunov function. The method comprises the following steps: acquiring the voltage of a new-energy grid connection point, the voltage phase angle of the new-energy grid connection point, the internal electromotive force of a synchronous machine, a line susceptance, and the rotor position angle of the synchronous machine in a new-energy power system, so as to obtain the output power of the synchronous machine; on the basis of the new-energy power system and the output power of the synchronous machine, obtaining a rotor motion equation of the synchronous machine; on the basis of the rotor motion equation of the synchronous machine, constructing a Lyapunov function based on the synchronous machine in the new-energy power system; on the basis of the Lyapunov function, obtaining a stability region boundary of the synchronous machine with respect to state variables; and on the basis of the stability region boundary and real-time values of post‑fault state variables, determining the transient stability of the synchronous machine. The method for analyzing the safety and stability of a new-energy power system on the basis of a Lyapunov function provided in the present disclosure features low construction difficulty, is universally applicable to nonlinear systems of different forms, and enables fast and accurate transient stability assessment.
H02J 3/44 - Synchronisation d'un générateur pour sa connexion à un réseau ou à un autre générateur avec moyens pour assurer une séquence de phase correcte
H02J 3/46 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs contrôlant la répartition de puissance entre les générateurs, convertisseurs ou transformateurs
H02J 3/24 - Dispositions pour empêcher ou réduire les oscillations de puissance dans les réseaux
G06F 17/11 - Opérations mathématiques complexes pour la résolution d'équations
A time-series production simulation method taking capacity dynamic programming into consideration, and an apparatus and a medium, relating to the technical field of power systems. The method comprises: establishing a single-year time-series production simulation model; on the basis of the single-year time-series production simulation model and a CNN-GRU network, constructing an equivalent load support rate interval decision network; on the basis of the single-year time-series production simulation model, constructing a multi-stage dynamic programming model oriented to the problem of power capacity expansion; using a NO search algorithm to compress a state space in the multi-stage dynamic programming model, so as to obtain a compressed state space for the problem of dynamic programming; and in the compressed state space, using an APO optimization algorithm and a DCS algorithm to construct a time-series production simulation method solution framework taking capacity dynamic programming into consideration, and using the time-series production simulation method solution framework to determine a fast time-series production simulation result taking capacity dynamic programming into consideration.
G06N 3/0442 - Réseaux récurrents, p. ex. réseaux de Hopfield caractérisés par la présence de mémoire ou de portes, p. ex. mémoire longue à court terme [LSTM] ou unités récurrentes à porte [GRU]
G06N 3/006 - Vie artificielle, c.-à-d. agencements informatiques simulant la vie fondés sur des formes de vie individuelles ou collectives simulées et virtuelles, p. ex. simulations sociales ou optimisation par essaims particulaires [PSO]
The present disclosure discloses a safety and stability analysis method for a new energy power system based on Lyapunov function, including: obtaining a new energy grid connection point voltage, a new energy grid connection point voltage phase angle, an internal potential of a synchronous machine, a line susceptance and a rotor position angle of the synchronous machine of the new energy power system, to obtain an output power of synchronous machine; obtaining a synchronous machine rotor motion equation according to the output power of synchronous machine; constructing a Lyapunov function of synchronous machine based on the new energy power system according to the synchronous machine rotor motion equation; obtaining a stability domain boundary of the synchronous machine with respect to the state variables according to the Lyapunov function; determining a transient stability of the synchronous machine according to real-time values of post-fault state variables.
A method for allocating hybrid energy storage capacity is provided, including: determining a curve of an SoC with a maximum utility of the hybrid energy storage system in a predetermined time period as an objective function, with an SoC constraint and ES charging and discharging constraints as constraint conditions according to an power service utility signal; extracting an SoC value and a time point corresponding to each extreme point in the curve of the SoC; calculating a difference between adjacent SoC values to obtain a mileage sequence; obtaining a plurality of cycle processes and a mileage corresponding to each cycle process; constructing a mathematical model of a relationship between the mileage and an utility loss; calculating a mileage of each energy storage in a corresponding cycle process by applying an equal consumed energy increase ratio principle according to the mathematical model.
H02J 3/28 - Dispositions pour l'équilibrage de charge dans un réseau par emmagasinage d'énergie
H02J 13/00 - Circuits pour pourvoir à l'indication à distance des conditions d'un réseau, p. ex. un enregistrement instantané des conditions d'ouverture ou de fermeture de chaque sectionneur du réseauCircuits pour pourvoir à la commande à distance des moyens de commutation dans un réseau de distribution d'énergie, p. ex. mise en ou hors circuit de consommateurs de courant par l'utilisation de signaux d'impulsion codés transmis par le réseau
14.
Steam power cycle thermoelectric decoupling system, and control method, device, medium, and product thereof
A steam power cycle thermoelectric decoupling system includes a molten salt heat storage system, a steam accumulator heat storage system, and a preheating system. The steam accumulator heat storage system is taken as a main heat storage component, which solves low heat storage efficiency and high heat storage costs by simply using molten salt. Saturated steam released by the steam accumulator heat storage system is heated to a superheated state by heat stored in the molten salt heat storage system, achieving supplement of the saturated steam released by the steam accumulator heat storage system to the heat supply network, and the preheating system is utilized for solving the problem that the temperature of steam output from the steam accumulator heat storage system is lower than the solidifying point temperature of the molten salt, causing the solidification of molten salt.
F01K 3/14 - Ensembles fonctionnels caractérisés par l'emploi d'accumulateurs de vapeur ou de chaleur ou bien de réchauffeurs intermédiaires de vapeur comportant à la fois un accumulateur de vapeur et un réchauffeur, p. ex. accumulateur de surchauffe
F01K 1/02 - Accumulateurs de vapeur avec emmagasinage de la vapeur autrement que dans un liquide
F01K 1/16 - Autres dispositifs de sécurité ou de commande
F24D 11/00 - Systèmes de chauffage central utilisant la chaleur accumulée dans des matériaux accumulateurs
F24D 19/00 - SYSTÈMES DE CHAUFFAGE DE LOCAUX DOMESTIQUES OU D'AUTRES LOCAUX, p. ex. SYSTÈMES DE CHAUFFAGE CENTRALSYSTÈMES D'ALIMENTATION EN EAU CHAUDE À USAGE DOMESTIQUELEURS ÉLÉMENTS OU PARTIES CONSTITUTIVES Détails
F28D 20/00 - Appareils ou ensembles fonctionnels d'accumulation de chaleur en généralAppareils échangeurs de chaleur de régénération non couverts par les groupes ou
15.
Method and device for calculating fault measurement impedance of hybrid-connected grid-following and grid-forming wind power system
The present disclosure provides a method and device for calculating fault measurement impedance of a hybrid-connected grid-following and grid-forming wind power system. The method includes: obtaining characteristics of the grid-following and grid-forming converters and a corresponding low voltage ride-through control strategy; establishing an equivalent circuit under a corresponding fault state; conducting a simplified analysis on the wind power system to obtain an equivalent network diagram; obtaining a sub-circuit diagram of each power source excitation acting alone; obtaining short-circuit currents on both sides of the corresponding system and a grid connection point voltage; superimposing to obtain total short-circuit current on both sides of the wind power system and total grid connection point voltage; and obtaining a measurement impedance at a protection installation location on the new energy source side. The method can accurately calculate the measurement impedance value at the protection installation location after the wind power system has fault.
H02J 3/00 - Circuits pour réseaux principaux ou de distribution, à courant alternatif
G01R 27/16 - Mesure de l'impédance d'un élément ou d'un réseau dans lequel passe un courant provenant d'une autre source, p. ex. câble, ligne de transport de l'énergie
H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs
16.
METHOD, SYSTEM AND DEVICE FOR MODELING MULTI-STATE MIXING PRECISION OF BATTERY ENERGY STORAGE CONTAINER
A method, a system and a device for modeling multi-state mixing precision of a battery energy storage container are provided. The method includes: dividing a battery energy storage container into a four-level model; dividing states of the battery cells into five states according to SOHs of the battery cells; constructing a normal distribution model of the SOHs and determining the probability of each battery cell in each state; constructing a universal generating function of the battery cells; constructing the universal generating function of a battery pack, the universal generating function of a battery cluster, and the universal generating function of a battery compartment; and constructing an overall model of a five-state and four-level mixing precision energy storage battery compartment based on each universal generating function and an internal topological structure of the battery energy storage container.
G01R 31/367 - Logiciels à cet effet, p. ex. pour le test des batteries en utilisant une modélisation ou des tables de correspondance
G01R 31/392 - Détermination du vieillissement ou de la dégradation de la batterie, p. ex. état de santé
G01R 31/396 - Acquisition ou traitement de données pour le test ou la surveillance d’éléments particuliers ou de groupes particuliers d’éléments dans une batterie
17.
ENERGY STORAGE MULTIPLEX REGULATION METHOD, SYSTEM THEREOF AND ELECTRONIC DEVICE
Provided is an energy storage multiplex operation method, a system thereof and an electronic device, which relates to a field of energy storage operation. The method includes: acquiring coefficients of electricity services in which an energy storage system participates; solving an energy storage operation model of the energy storage system in a current multiplexing mode according to the coefficients of different electricity services to obtain a charging power or a discharging power of the energy storage system under different electricity services; and performing, by the energy storage system, charging or discharging operation on different electricity services, according to the charging power or discharging power of the energy storage system under different electricity services. According to different multiplexing modes and in combination with efficiency maximization, the proportion and the charging and discharging capacity of the energy storage system under various electricity services are calculated and determined.
STATE GRID LIAONING ELECTRIC POWER SUPPLY CO., LTD. (Chine)
Inventeur(s)
Hu, Bo
Gong, Gangjun
Yang, Jiaxuan
Cui, Wanli
Dong, Jichao
Lu, Jun
Zhang, Xu
Lin, Chunhua
Ma, Zongle
Qiang, Ren
Liu, Li
Zhang, Qiguo
Wu, Xin
Liu, Jiuliang
Wang, Luyao
Jiang, Luning
Wang, Yurui
Su, Chang
Fang, Qiang
Yu, Ao
Wang, Yutong
Zhou, Shengjie
Lin, Meinan
Feng, Linan
Liu, Yilin
Zhang, Qiang
Abrégé
N of each substation to be tracked; and acquiring a carbon flow rate of each substation to be tracked, a carbon flow rate of the branch, and a carbon flow rate of an output load on the basis of the carbon potential matrix of each substation to be tracked.
A line protection method and system for wind farm connected to flexible DC system involves: obtaining high frequency components of voltage and current at protection installations on both sides of a transmission line, when a fault of the transmission line of a direct drive wind field connected to a flexible DC system is monitored; obtaining 1-mode transient action impedance difference of the transmission line, based on the high-frequency components of voltage and current at the protection installations on both sides of the transmission line; determining whether a fault inside the area of the transmission line occurs, based on the 1-mode transient action impedance difference and fault identification criterion of the transmission line, and starting the protection action of the transmission line if it is determined that the fault inside the area of the transmission line occurs.
H02H 7/26 - Protection sectionnelle de systèmes de câbles ou de lignes, p. ex. pour déconnecter une section dans laquelle un court-circuit, un défaut à la terre, ou une décharge d'arc se sont produits
G01R 31/08 - Localisation de défauts dans les câbles, les lignes de transmission ou les réseaux
H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs
20.
METHOD FOR MANAGING HEAT-ELECTRIC OUTPUTS OF HIGH-PROPORTION NEW ENERGY SYSTEM BASED ON CSP-CHP COMBINED ENERGY SUPPLY AND SYSTEM THEREOF
The present invention provides a method for managing heat-electric outputs of a high-proportion new energy system based on CSP-CHP combined energy supply, which belongs to the field of new energy system optimization and are used for solving the problems of insufficient flexibility of the high-proportion new energy system during the heating period and difficult consumption of renewable energy. The method includes: establishing a concentrating solar power (CSP) unit model and a combined heat and power (CHP) unit model based on the built structure; establishing a collaborative optimization model of the high-proportion new energy system based on the proposed unit models; acquiring relevant data of various units and renewable resource data; obtaining a sum of hourly electric power outputs and a sum of hourly heat outputs; and controlling a heat storage apparatus to store or output a certain amount of heat energy.
H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs
F02C 1/00 - Ensembles fonctionnels de turbines à gaz caractérisés par l'utilisation de gaz chauds ou de gaz sous pression non chauffés, comme fluide de travail
F02C 6/14 - Ensembles fonctionnels de turbines à gaz comportant des moyens pour emmagasiner l'énergie, p. ex. pour faire face à des pointes de charge
G05B 17/02 - Systèmes impliquant l'usage de modèles ou de simulateurs desdits systèmes électriques
21.
METHOD FOR AGGREGATION REGULATION OPTIMIZATION OF ELECTRIC VEHICLE LOAD BY CONSIDERING COMPREHENSIVE RESPONSE COEFFICIENT
State Grid Smart Internet of Vehicles Co., Ltd (Chine)
STATE GRID SHANGHAI MUNICIPAL ELECTRIC POWER COMPANY (Chine)
STATE GRID CORPORATION OF CHINA (Chine)
Inventeur(s)
Liu, Dunnan
Liu, Mingguang
Quan, Shengming
Wang, Wen
Yang, Xingang
Su, Shu
Zhang, Yue
Yang, Ye
Cao, Boyuan
Guo, Weijia
Li, Peijun
Tang, Xiao
Abrégé
A method for aggregation regulation optimization of an electric vehicle load by considering a comprehensive response coefficient is disclosed. The method includes the following steps: Step 1, collecting electric vehicle charging information; Step 2, based on the electric vehicle charging information collected in Step 1, calculating aggregation regulation response indexes for user participation, and determining a weight of each aggregation regulation response index; Step 3, based on the calculation result of each aggregation regulation response index for user participation obtained in Step 2, calculating a comprehensive response coefficient of an electric vehicle; and Step 4, performing the aggregation regulation optimization of the electric vehicle load by using minimum load power deviation determined by a dispatching scheme and an actually considered comprehensive response coefficient as a target and using a load rate, a peak-valley difference and a load fluctuation rate after dispatching as constraints.
A method and apparatus for determining the safety inertia of a power grid system, and a computer device. The method comprises: determining a first safety inertia for ensuring safe operation of a power grid system when a frequency change rate after disturbance occurs in the power grid system exceeds a first threshold (S302); determining a second safety inertia for ensuring the safe operation of the power grid system when the frequency after the disturbance occurs in the power grid system is less than a second threshold (S304); and determining a target safety inertia according to the first safety inertia and the second safety inertia, wherein the target safety inertia is a safety inertia lower limit value for ensuring the safe operation of the power grid system (S306).
A method for protecting a power system having inverter-interfaced renewable energy sources is provided. The power system includes an inverter and a control system. The control system includes a current controller including a saturation limiter and a proportional and integral (PI) controller, a phase-locked system, and a low-voltage ride-through (LVRT) control unit. The method includes: by using a Park transformation matrix, determining an output voltage of the inverter; determining a modulated voltage of the output voltage; upon detecting a grid fault, obtaining current references by the LVRT control unit; determining a fault current in a first stage of a transient phase of the grid fault; determining a fault current in a second stage of the transient phase; determining a fault current in a third stage of the transient phase; and switching the control system to a fault control mode by tracking the fault currents in the first, second and third stages, to the current references.
H02J 3/00 - Circuits pour réseaux principaux ou de distribution, à courant alternatif
H02M 7/537 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs, p. ex. onduleurs à impulsions à un seul commutateur
H02M 7/5395 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs, p. ex. onduleurs à impulsions à un seul commutateur avec commande automatique de la forme d'onde ou de la fréquence de sortie par modulation de largeur d'impulsions
24.
Short-circuit fault detection method for a power grid
A method for analytically studying fault responses of an inverter-interfaced renewable energy source (IIRES). The IIRES includes a decoupled sequence control (DSC) system, and the DSC system includes a converter, a current controller, a low-voltage ride-through (LVRT) control unit, and positive and negative sequence components calculation (PNSCC) structures. The method includes: determining a detailed fault model of the IIRES; determining a unified model of the PNSCC structures; determining a simplified fault model of the IIRES in a fault detection phase; determining a simplified fault model of the IIRES in a control transient response (CTR) phase; detecting a short-circuit fault; cutting off an outer loop of the DSC system; switching the DSC system to a current control mode through the LVRT unit by the current controller; analyzing the short-circuit fault; and designing an enhanced fault-ride-through control of the IIRESs to suppress an inrush current to protect the IIRES.
The present invention relates to the technical field of wind power generation simulation. Disclosed is a wind turbine modeling and aerodynamic characteristic calculation method based on blade three-dimensional scanning. The method comprises: performing three-dimensional scanning on the surfaces of wind turbine blades; obtaining the coordinates of the blades; performing segmentation processing on the blades, and cutting a plurality of cross-sections; calculating the chord length and the twist angle according to the extracted cross-section data; normalizing the extracted cross-section coordinates, and rotating an airfoil to a horizontal direction according to the twist angle thereof; comparing the coordinates of an obtained normalized scatter point with the coordinates of scatter points of existing airfoils in a database, determining the type of the airfoil, if the scatter point is present, directly extracting aerodynamic data of the airfoil, if the scatter point is not present, calculating the aerodynamic data of the airfoil by means of CFD, and returning new airfoil data to the database; and performing complete machine modeling on a wind turbine, and calculating the aerodynamic performance of the wind turbine to obtain an axial induction factor and a tangential induction factor at each blade element position. According to the present invention, the result is reliable, and the problem of data missing of some blades is practically and effectively solved.
G06F 30/28 - Optimisation, vérification ou simulation de l’objet conçu utilisant la dynamique des fluides, p. ex. les équations de Navier-Stokes ou la dynamique des fluides numérique [DFN]
26.
Nickel/nickel hydroxide electrode catalyst, preparation method thereof and application thereof
2; and the porous matrix structure is nickel, and the nanosheet is nickel hydroxide in β configuration. The present disclosure develops an electrode catalyst with higher catalytic efficiency and a simpler preparation method based on the Ni-based catalysts to achieve efficient application of hydrogen energy.
A method and apparatus for optimally configuring a capacity of a high-proportion new energy system, a device, and a medium, which belong to the field of new energy system optimization and are used for solving the problems of insufficient flexibility of the high-proportion new energy system during the heating period and difficult consumption of renewable energy. The method includes: constructing a high-proportion new energy system structure; establishing a concentrating solar power (CSP) unit model and a combined heat and power (CHP) unit model based on the proposed structure; establishing a high-proportion new energy system collaborative optimization model based on the proposed unit models; acquiring relevant data of various units and renewable resource data; and obtaining a capacity configuration and operation optimization scheme of various units in the high-proportion new energy system according to the established model, thereby improving the renewable energy consumption of the system.
The present disclosure discloses a method for performing multi-stage multi-level cooperative operation on a park integrated energy system containing a mineral industry user. The method includes: constructing a short-time scale dynamic pricing model, including an upper-layer CMIES operation optimization model and a lower-layer user demand response model; solving the short-time scale dynamic pricing model to obtain day-ahead and intraday scheduling plans and a next-day electricity price; and based on the day-ahead and intraday scheduling plans and the next-day electricity price, computing a strategy transfer probability distribution of each subject within a preset deadline, and simulating a decision-making process by a Monte Carlo method until each subject reaches a correlated equilibrium state to obtain a pricing solution of CMIES within the preset deadline. According to the present disclosure, the energy utilization efficiency of the system can be improved, and the operation cost can be reduced.
G06Q 10/04 - Prévision ou optimisation spécialement adaptées à des fins administratives ou de gestion, p. ex. programmation linéaire ou "problème d’optimisation des stocks"
29.
POWER SYSTEM BALANCE OPTIMIZATION METHOD BASED ON BALANCING UNITS
The disclosure provides a power system balance optimization method based on balancing units, including: collecting power generation and consumption information of market subjects in a balancing unit, calculating a output situation of a power generation side when the system operation cost is minimum, and judging whether to carry out a power exchange between units; the balancing unit optimizes and selects an operation strategy according to market environment, and then optimizes and selects the operation strategy according to the market environment; the disclosure carries out hierarchical management through balancing units, and the system balance costs of power generation, regulation, power exchange and fully considers balance cost of power generation, regulation, power exchange and other systems of multiple entities on the power generation side, transmission side and power consumption side.
H02J 3/46 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs contrôlant la répartition de puissance entre les générateurs, convertisseurs ou transformateurs
G06Q 10/0631 - Planification, affectation, distribution ou ordonnancement de ressources d’entreprises ou d’organisations
H02J 3/00 - Circuits pour réseaux principaux ou de distribution, à courant alternatif
H02J 3/06 - Commande du transfert de puissance entre réseaux connectésCommande du partage de charge entre réseaux connectés
30.
Active power filtering-based harmonic suppression method, system and device using VOC inverter
A harmonic suppression method, system and device using active power filtering based on a Virtual Oscillator Control (VOC) inverter are provided. The method includes the following steps: firstly, the basic structure and control of VOC and its parameter design are given; then the parameters of VOC are designed; then the active filtering harmonic suppression strategy based on VOC is proposed; finally, the suppression strategy is applied in the grid-connected inverter system and its effectiveness is verified by simulation.
A cooperative operation optimization control method for wind turbine groups, including: dividing wind turbine groups based on a digital model and an improved Jensen wake model; performing multi-degree-of-freedom controller design on wind turbines; calculating an ultimate load of the wind turbines jointly by using two methods, and constructing a safe load constraint and a yaw angle constraint for wind turbine operation in conjunction with a safe load coefficient; establishing a collaborative optimization problem model of the wind turbine groups by taking the maximum generating power of the wind turbine groups as an optimization objective, a yaw angle of an upstream wind turbine as a decision variable, and the safe load constraint, the yaw angle constraint and a power change range of the upstream wind turbine as constraint conditions; and determining a cooperative operation optimization algorithm for the wind turbine groups, and optimizing the yaw angle of the wind turbines.
A direct-current energy consumption apparatus, a control method, a medium and an electronic apparatus, relating to the technical field of flexible direct-current power transmission. The direct-current energy consumption apparatus comprises: N switch modules (1), a first reactor (6), and a first energy consumption resistor (7). The negative electrode of each switch module is connected to the positive electrode of a switch module adjacent thereto, and an output end of an N-th switch module is sequentially connected in series to the first reactor and the first energy consumption resistor. Each switch module comprises: a first thyristor (4), a first capacitor (2), a first inductor (3) and a first equalizing resistor (5); an input end of the switch module is connected to the anode of the first thyristor, and an output end of the switch module is connected to the cathode of the first thyristor; one end of the first capacitor is connected to the anode of the first thyristor, and the other end is connected in series to the first inductor and then is connected to the cathode of the first thyristor; and the first equalizing resistor is connected in parallel between the two ends of the first thyristor. N is a natural number and N≥2. The direct-current energy consumption apparatus has higher reliability and lower cost.
H02J 3/12 - Circuits pour réseaux principaux ou de distribution, à courant alternatif pour règler la tension dans des réseaux à courant alternatif par changement d'une caractéristique de la charge du réseau
H02J 3/36 - Dispositions pour le transfert de puissance électrique entre réseaux à courant alternatif par l'intermédiaire de haute tension à courant continu
33.
Constructing a multistage food chain biofilm system enhanced by electrochemistry and its application in pharmaceutical wastewater
2-n porous membrane electrodes, and a multistage flow-through composite electrochemical-biological submerged fixed film reactor is constructed jointly with the PA-N-rGO fixed fiber carrier and applied to deep purification of high-risk substances in pharmaceutical wastewater. The flow-through electrochemical degradation module can also effectively degrade antibiotics resistance genes and refractory organics in the water, improve the biodegradability of the wastewater and improve the degradation performance and load of shock resistance of the system, so the multistage flow-through composite electrochemical-biological submerged fixed film reactor can realize the high-efficiency low-consumption treatment of pharmaceutical wastewater and effectively reduce the yield of excess activated sludge.
C02F 103/34 - Nature de l'eau, des eaux résiduaires ou des eaux ou boues d'égout à traiter provenant de l'industrie chimique non prévue dans les groupes
C02F 9/00 - Traitement en plusieurs étapes de l'eau, des eaux résiduaires ou des eaux d'égout
34.
Method and device for generating wind turbine generator set simulation model, equipment, and medium
A method and device for generating a wind turbine generator set simulation model, equipment and a medium, wherein the method includes: clustering a plurality of pieces of historical operation data of a wind turbine generator set, so as to obtain a predetermined number of target data sets, wherein wind speeds contained in each piece of the historical operation data in a target data set fall within a wind speed range corresponding to the target data set; different target data sets correspond to different wind speed ranges; training an initial simulation model by using each target data set, so as to obtain a segmented pneumatic simulation model corresponding to each target data set; constructing a transmission generation simulation model for a transmission system and a generator system, based on the historical operation data; concatenating the segmented pneumatic simulation model corresponding to each wind speed range and the transmission generation simulation model.
The present disclosure provides a method and device for simulating a dynamic digital twin model of dominant operation of a wind turbine generator assembly, by which conventional operational parameters of the wind turbine generator assembly that are acquired in real time are preprocessed to obtain steady-state operational parameters of the wind turbine generator assembly. A pneumatic subsystem-related data black box model, a transmission subsystem model, a tower subsystem model, and an electrical subsystem model are simulated individually using the steady-state operational parameters, and then combined to form a dynamic dominant-operation simulation model for simulating an operation process of the wind turbine generator assembly. Meanwhile, a dynamic deviation compensation model is constructed on the basis of the dynamic dominant-operation simulation model.
In this disclosure, the energy management problem of the D-LEGS with FFR is analyzed, so as to enhance the frequency stability of the main grid. The post-disturbance frequency response behaviors of both the main grid and the D-IEGS are precisely depicted, where the dead zones, limiting ranges and time constant of the governors are considered. The frequency regulation units of the D-IEGS include GTs and P2G units, whose impacts of providing frequency regulation service on the gas networks are quantified. Considering the time-scale similarity of the frequency dynamics and the dynamics of the GDN, the gas flow dynamics model is adopted. The frequency response dynamics of the GTs and P2G units, and the gas flow dynamics of the GDN, a variable-step difference scheme and a binary variable reduction method are devised.
H02J 3/46 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs contrôlant la répartition de puissance entre les générateurs, convertisseurs ou transformateurs
37.
System and method for stabilizing frequency of the power grid
A method implemented in a power grid including a DFIG wind turbine is provided. The method includes: assuming the DFIG wind turbine to be operated in a MPPT mode; generating a simplified transient model of the DFIG wind turbine, the simplified transient model including an equivalent circuit model, and an equivalent rotor motion model in a nonlinear form; linearizing the equivalent rotor motion model in the nonlinear form to be an equivalent rotor motion model in a linear form with respect to a steady-state operating point of the DFIG wind turbine; and determining a first contribution and a second contribution of the DFIG wind turbines to a post-disturbance frequency of the power grid, in a center of inertia (COI) frequency frame and in a frequency spatial variation frame, respectively, by incorporating the simplified transient model of the DFIG wind turbine into a frequency dynamics analysis.
G05B 15/02 - Systèmes commandés par un calculateur électriques
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
H02P 9/00 - Dispositions pour la commande de génératrices électriques de façon à obtenir les caractéristiques désirées à la sortie
H02J 3/24 - Dispositions pour empêcher ou réduire les oscillations de puissance dans les réseaux
38.
Tensegrity offshore wind power generation support structure
A tensegrity offshore wind power generation support structure is provided, relating to the technical field of offshore wind power. The support structure includes inclined columns, prestressed cables, a rigid support, a floating foundation and anchoring systems. A stable self-balancing space supporting structure is formed by the inclined columns and the cables; the inclined columns inclines outwards, upper parts of the inclined columns are connected with the prestressed cables; the bottom ends of the inclined columns are connected with the floating foundation; the middle parts of the inclined columns are connected with the rigid support; and the floating foundation is fixed with a seabed through the anchoring systems. According to the support structure, a tower in the traditional design is not needed, and all the cables are ensured to be in a tension state through the support of the inclined columns.
E04H 12/20 - Moyens de support latéraux à cet effet, p. ex. utilisant des amarres ou des entretoises
F03D 13/25 - Dispositions pour monter ou supporter des mécanismes moteurs à ventPylônes ou tours pour des mécanismes moteurs à vent spécialement adaptés à l’installation offshore
39.
MULTI-LEVEL LARGE-SCALE ELECTRIC-VEHICLE POWER CONTROL METHOD AND SYSTEM
STATE GRID SMART INTERNET OF VEHICLES CO., LTD. (Chine)
NORTH CHINA ELECTRIC POWER UNIVERSITY (Chine)
Inventeur(s)
Yang, Ye
Wang, Wen
Hu, Junjie
Lu, Jiayue
Ma, Wenshuai
Gao, Shiqiao
Deng, Ming
Li, Yao
Qin, Jian
Abrégé
A multi-level large-scale electric-vehicle power control method. The method comprises: constructing a rolling optimization control framework for two-layer power decomposition; clustering electric-vehicle charging piles according to the type of each charging pile, a regulation precision index of same and a linear fitting index of same; according to a regulation cost index and the regulation precision index, constructing a real-time power deviation decomposition model in which a power regulation amount of the charging pile cluster is used as a decision variable, and decomposing a power instruction to obtain the maximum benefit is used as an objective function; constructing an electric-vehicle power regulation priority according to the current SoC and off-grid time of an electric vehicle in the charging pile cluster; determining a corresponding power regulation amount for the electric vehicle according to the determined power regulation amount of the charging pile cluster and the corresponding electric-vehicle power regulation priority; and performing control according to the power regulation amount of each electric vehicle. The control method can achieve quick and accurate large-scale control over the power of an electric vehicle. Further provided is a corresponding multi-level large-scale electric-vehicle power control system.
A method for analytically studying fault responses of an inverter-interfaced renewable energy source (IIRES). The IIRES includes a decoupled sequence control (DSC) system, and the DSC system includes a converter, a current controller, a low-voltage ride-through (LVRT) control unit, and positive and negative sequence components calculation (PNSCC) structures. The method includes: determining a detailed fault model of the IIRES; determining a unified model of the PNSCC structures; determining a simplified fault model of the IIRES in a fault detection phase; determining a simplified fault model of the IIRES in a control transient response (CTR) phase; detecting a short-circuit fault; cutting off an outer loop of the DSC system; switching the DSC system to a current control mode through the LVRT unit by the current controller; analyzing the short-circuit fault; and designing an enhanced fault-ride-through control of the IIRESs to suppress an inrush current to protect the IIRES.
A method for primary frequency regulation (PFR)reserve procurement of a renewable energy power system is provided. The renewable energy power system includes synchronous power sources and renewable energy sources, and the renewable energy sources participate in frequency regulation using virtual synchronous machine (VSM) control. The method includes: aggregating generators in the synchronous power sources and renewable energy sources into an equivalent unit having an equivalent governor; based on the equivalent unit, determining system frequency dynamics of the renewable energy power system in a s-domain; transforming the s-domain to a time-domain equation for the system frequency dynamics in both over-damped and under-damped states; according to a first-order optimality condition of the time-domain equation, determining a time domain expression of frequency extremum; stabilizing system frequency of the renewable energy power system by adding a hyperplane based frequency stability constraint; and determining the PFR reserve procurement of the renewable energy power system.
Online estimation of area-level inertia can be used for frequency stability control in low-inertia power systems. This disclosure provides an area-level inertia online estimation method considering inter-area equivalent frequency dynamics. The disclosed method only needs one phasor measurement unit placed at any bus within each area. The inter-area equivalent frequency dynamics model for the multi-area power system is developed, which is employed to estimate area-level inertia under the small disturbance situation. Then, the area-level inertia estimation model boils down to a nonlinear parameter identification problem. The other boundary conditions of the disclosed method are derived by parameter identifiability.
G01R 21/133 - Dispositions pour procéder aux mesures de la puissance ou du facteur de puissance en utilisant des techniques numériques
G01R 19/25 - Dispositions pour procéder aux mesures de courant ou de tension ou pour en indiquer l'existence ou le signe utilisant une méthode de mesure numérique
G01R 31/08 - Localisation de défauts dans les câbles, les lignes de transmission ou les réseaux
43.
Coating for preventing marine biofouling and preparation method thereof
Provided are a coating for preventing marine biofouling and a preparation method thereof, wherein, the coating for preventing marine biofouling, including an antifouling cladding layer disposed on a metal substrate, the antifouling cladding layer is a metastable-phase antifouling cladding layer; the antifouling cladding layer includes a dispersedly distributed Fe-rich precipitation phase and a Cu-rich solid solution containing supersaturated Fe, and the Cu-rich solid solution containing supersaturated Fe is a Cu—Fe—Sn—Si—P copper-based solid solution; the antifouling cladding layer is prepared by a raw material of a Cu—Fe—Sn—Si—P alloy powder; the Cu—Fe—Sn—Si—P alloy powder is prepared by the following raw materials in mass percentage: Fe: 8% to 40%; Sn: 0.3% to 8%; Si: 0.1% to 0.5%; P: 0.1% to 0.5%; and Cu as a balance; and the metal substrate is selected from the group consisting of a steel substrate, a copper alloy substrate, a titanium alloy substrate, and an aluminum alloy substrate.
B32B 15/18 - Produits stratifiés composés essentiellement de métal comportant du fer ou de l'acier
B22F 9/08 - Fabrication des poudres métalliques ou de leurs suspensionsAppareils ou dispositifs spécialement adaptés à cet effet par des procédés physiques à partir d'un matériau liquide par coulée, p. ex. à travers de petits orifices ou dans l'eau, par atomisation ou pulvérisation
A fault-tolerant control method and apparatus of a floating wind turbine are provided. The fault-tolerant control method and apparatus of a floating wind turbine can acquire a low-order nonlinear model of a pre-established floating wind turbine, establish a switching linear model of the floating wind turbine based on the low-order nonlinear model, acquire a modal parameter of the current floating wind turbine, and determine based on the modal parameter a sub-model that the floating wind turbine currently satisfies, so as to establish a switching sliding mode surface and a full-order state observer of the floating wind turbine based on the sub-model and the modal parameter, and further calculate a feedback output of a controller of the floating wind turbine according to the switching sliding mode surface and the full-order state observer.
An electromagnetic transient simulation method and apparatus for a voltage source converter (VSC), an electronic device, and a storage medium are provided. The method mainly includes: performing circuit equivalence processing on a voltage source converter with any quantity of ports based on a work mechanism of the voltage source converter; performing discretization processing on the equivalent circuit, to obtain an equivalent target circuit, and determining a node admittance matrix expression and a historical current source expression according to the equivalent target circuit; and constructing a multi-port Norton equivalent model corresponding to the voltage source converter according to the node admittance matrix expression and the historical current source expression, and performing electromagnetic transient simulation on the voltage source converter by using the multi-port Norton equivalent model, to obtain a simulation result.
G06F 30/367 - Vérification de la conception, p. ex. par simulation, programme de simulation avec emphase de circuit intégré [SPICE], méthodes directes ou de relaxation
Provided are control method and device of an energy-storage coordinated floating wind turbine, relating to the technical field of wind turbines. The control method of an energy-storage coordinated floating wind turbine can construct a primary frequency regulation model of a floating wind farm based on a frequency response unit, construct a second frequency regulation model according to an energy storage system, further construct, according to the primary frequency regulation model and the second frequency regulation model, a frequency regulation model of a hybrid power system containing the floating wind farm, the energy storage system, and a pre-set thermal power unit, and design an overall frequency regulation control strategy of the hybrid power system based on the frequency regulation model of the hybrid power system.
F03D 13/25 - Dispositions pour monter ou supporter des mécanismes moteurs à ventPylônes ou tours pour des mécanismes moteurs à vent spécialement adaptés à l’installation offshore
A method for protecting a power system having inverter-interfaced renewable energy sources is provided. The power system includes an inverter and a control system. The control system includes a current controller including a saturation limiter and a proportional and integral (PI) controller, a phase-locked system, and a low-voltage ride-through (LVRT)control unit. The method includes: by using a Park transformation matrix, determining an output voltage of the inverter; determining a modulated voltage of the output voltage; upon detecting a grid fault, obtaining current references by the LVRT control unit; determining a fault current in a first stage of a transient phase of the grid fault; determining a fault current in a second stage of the transient phase; determining a fault current in a third stage of the transient phase; and switching the control system to a fault control mode by tracking the fault currents in the first, second and third stages, to the current references.
H02J 3/00 - Circuits pour réseaux principaux ou de distribution, à courant alternatif
H02M 7/537 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs, p. ex. onduleurs à impulsions à un seul commutateur
H02M 7/5395 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs, p. ex. onduleurs à impulsions à un seul commutateur avec commande automatique de la forme d'onde ou de la fréquence de sortie par modulation de largeur d'impulsions
48.
Estimation system for aggregated inertia in a power system
An exemplary two-step method for power system inertia online estimation is described. The first step is to accurately estimate the POI-level aggregated inertia. The second step is to calculate the system-level inertia constant by weighting all the POI-level aggregated inertia and to monitor the inertia spatial distribution. In one example embodiment, the PMU is installed at POI, the frequency spatial difference is considered, and the mechanical power is carefully treated.
Online estimation of area-level inertia can be used for frequency stability control in low-inertia power systems. This disclosure provides an area-level inertia online estimation method considering inter-area equivalent frequency dynamics. The disclosed method only needs one phasor measurement unit placed at any bus within each area. The inter-area equivalent frequency dynamics model for the multi-area power system is developed, which is employed to estimate area-level inertia under the small disturbance situation. Then, the area-level inertia estimation model boils down to a nonlinear parameter identification problem. The other boundary conditions of the disclosed method are derived by parameter identifiability.
G01R 21/133 - Dispositions pour procéder aux mesures de la puissance ou du facteur de puissance en utilisant des techniques numériques
G01R 31/08 - Localisation de défauts dans les câbles, les lignes de transmission ou les réseaux
G01R 19/25 - Dispositions pour procéder aux mesures de courant ou de tension ou pour en indiquer l'existence ou le signe utilisant une méthode de mesure numérique
50.
Energy management of distribution-level integrated electric-gas systems with fast frequency reserve
In this disclosure, the energy management problem of the D-IEGS with FFR is analyzed, so as to enhance the frequency stability of the main grid. The post-disturbance frequency response behaviors of both the main grid and the D-IEGS are precisely depicted, where the dead zones, limiting ranges and time constant of the governors are considered. The frequency regulation units of the D-IEGS include GTs and P2G units, whose impacts of providing frequency regulation service on the gas networks are quantified. Considering the time-scale similarity of the frequency dynamics and the dynamics of the GDN, the gas flow dynamics model is adopted. The frequency response dynamics of the GTs and P2G units, and the gas flow dynamics of the GDN, a variable-step difference scheme and a binary variable reduction method are devised.
H02J 3/46 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs contrôlant la répartition de puissance entre les générateurs, convertisseurs ou transformateurs
51.
System and method of primary frequency reserve procurement of power systems considering multiple damping states and governor limiters
A method for primary frequency regulation (PFR)reserve procurement of a renewable energy power system is provided. The renewable energy power system includes synchronous power sources and renewable energy sources, and the renewable energy sources participate in frequency regulation using virtual synchronous machine (VSM) control. The method includes: aggregating generators in the synchronous power sources and renewable energy sources into an equivalent unit having an equivalent governor; based on the equivalent unit, determining system frequency dynamics of the renewable energy power system in a s-domain; transforming the s-domain to a time-domain equation for the system frequency dynamics in both over-damped and under-damped states; according to a first-order optimality condition of the time-domain equation, determining a time domain expression of frequency extremum; stabilizing system frequency of the renewable energy power system by adding a hyperplane based frequency stability constraint; and determining the PFR reserve procurement of the renewable energy power system.
A method implemented in a power grid including a DFIG wind turbine is provided. The method includes: assuming the DFIG wind turbine to be operated in a MPPT mode; generating a simplified transient model of the DFIG wind turbine, the simplified transient model including an equivalent circuit model, and an equivalent rotor motion model in a nonlinear form; linearizing the equivalent rotor motion model in the nonlinear form to be an equivalent rotor motion model in a linear form with respect to a steady-state operating point of the DFIG wind turbine; and determining a first contribution and a second contribution of the DFIG wind turbines to a post-disturbance frequency of the power grid, in a center of inertia (COI) frequency frame and in a frequency spatial variation frame, respectively, by incorporating the simplified transient model of the DFIG wind turbine into a frequency dynamics analysis.
G05B 15/02 - Systèmes commandés par un calculateur électriques
H02P 9/00 - Dispositions pour la commande de génératrices électriques de façon à obtenir les caractéristiques désirées à la sortie
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
H02J 3/24 - Dispositions pour empêcher ou réduire les oscillations de puissance dans les réseaux
53.
Wind farm control strategy method, apparatus and device, and storage medium
A wind farm control strategy method, apparatus and device, and a storage medium are provided. The method includes: acquiring incoming flow wind data of a target wind farm, a restriction relationship between wind turbines in the target wind farm and current working condition data of the wind turbines in the target wind farm; inputting the incoming flow wind data, the restriction relationship and the current working condition data into a pre-trained working condition prediction model to obtain target working condition data corresponding to a target generation power of the target wind farm, the target generation power being a maximum generation power of the target wind farm; and controlling operation of the wind turbines in the target wind farm based on the target working condition data.
This disclosure provides a method to limit the post-disturbance node maximum RoCoF by optimizing UC decisions. The node initial RoCoF expressions under common disturbance types, including the load, the line switching, and the generator turbine disturbances, are derived. Then, the piecewise linear relationship between the node initial RoCoF and UC decision variables are obtained. To avoid numerical simulation of the node maximum RoCoF, two analytical constraints, i.e., the node initial RoCoF constraint and the COI maximum RoCoF constraint, are formulated in the UC model.
H02J 3/46 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs contrôlant la répartition de puissance entre les générateurs, convertisseurs ou transformateurs
H02J 3/00 - Circuits pour réseaux principaux ou de distribution, à courant alternatif
55.
Thermal power unit-flywheel energy storage cooperative frequency regulation control method and system
A thermal power unit-flywheel energy storage cooperative frequency regulation control method and system is provided, which belongs to the technical field of a power grid. First, a real-time output increment of a thermal power unit is predicted, then a real-time frequency regulation power instruction of a flywheel energy storage system is determined based on the predicted real-time output increment of the thermal power unit, and finally the frequency regulation power instruction of the thermal power unit is determined by a difference adjustment coefficient of a governor and a grid frequency deviation. The thermal power unit and flywheel energy storage system is cooperatively controlled by frequency regulation based on the real-time output increment predicted value of the unit, which realizes self-adaptive adjustment of output of the flywheel energy storage system under dynamic working conditions, and improves the grid frequency stability and operation safety of the thermal power unit.
H02J 3/30 - Dispositions pour l'équilibrage de charge dans un réseau par emmagasinage d'énergie utilisant des machines dynamo-électriques accouplées à des volants
H02J 3/24 - Dispositions pour empêcher ou réduire les oscillations de puissance dans les réseaux
56.
Frequency modulation dynamic modeling method and device for wind farm, and electronic device
The present invention provides a frequency modulation dynamic modeling method and device for a wind farm, and an electronic device. The method includes: acquiring first frequency modulation data measured at a grid-connected point of the wind farm under a plurality of preset working conditions; establishing a state space model corresponding to each of the plurality of working conditions according to the first frequency modulation data; measuring the nonlinearity between the state space models corresponding to each two of the plurality of working conditions by using a gap measurement method; combining the first frequency modulation data according to the nonlinearity to obtain second frequency modulation data; and training a preset initial LSTM neural network according to the second frequency modulation data until a preset training requirement is met, and obtaining a trained frequency modulation dynamic model of the wind farm.
G06N 3/0442 - Réseaux récurrents, p. ex. réseaux de Hopfield caractérisés par la présence de mémoire ou de portes, p. ex. mémoire longue à court terme [LSTM] ou unités récurrentes à porte [GRU]
57.
RoCoF constrained unit commitment considering spatial difference in frequency dynamics
This disclosure provides a method to limit the post-disturbance node maximum RoCoF by optimizing UC decisions. The node initial RoCoF expressions under common disturbance types, including the load, the line switching, and the generator turbine disturbances, are derived. Then, the piecewise linear relationship between the node initial RoCoF and UC decision variables are obtained. To avoid numerical simulation of the node maximum RoCoF, two analytical constraints, i.e., the node initial RoCoF constraint and the COI maximum RoCoF constraint, are formulated in the UC model.
H02J 3/46 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs contrôlant la répartition de puissance entre les générateurs, convertisseurs ou transformateurs
H02J 3/00 - Circuits pour réseaux principaux ou de distribution, à courant alternatif
58.
Stability control method and system for grid connected system of double-fed wind farm
The application relates to a stability-control method and system for grid-connected system of double-fed wind farm, which belongs to the technical field of wind power generation system. The method comprises: collecting operation state parameters of each unit in the system; according to the operation state parameters of each unit, determining a mutual voltage between the units, an interlocking phase angle between the units, and a sub-synchronous current of each unit; according to the mutual voltage between the units, the interlocking phase angle between the units and the sub-synchronous current component of each unit, determining an energy coefficient of each unit, and then obtaining a total energy coefficient; according to the total energy coefficient, regulating the operation state parameters of each unit.
H02P 9/10 - Commande s'exerçant sur le circuit d'excitation de la génératrice afin de réduire les effets nuisibles de surcharges ou de phénomènes transitoires, p. ex. application, suppression ou changement brutal de la charge
H02P 9/00 - Dispositions pour la commande de génératrices électriques de façon à obtenir les caractéristiques désirées à la sortie
59.
Method and system for a pilot directional protection of LCC-HVDC lines based on virtual grounding resistance
STATE GRID SHANGHAI MUNICIPAL ELECTRIC POWER COMPANY (Chine)
NORTH CHINA ELECTRIC POWER UNIVERSITY (Chine)
Inventeur(s)
Ma, Jing
Zhao, Wenyue
Nie, Zhencun
Li, Jialun
Wu, Yuchong
Wang, Zengping
Abrégé
The application relates to a method and system for a pilot directional protection of LCC-HVDC lines based on virtual grounding resistance. The method comprises: Obtaining a conduction state information of a converter and characteristic parameters of a converter circuit within one commutation period after a fault occurs; according to the conduction state information and characteristic parameters, determining characteristic frequency of the circuit; according to the characteristic frequency and characteristic parameters, determining a virtual grounding resistance; according to the virtual grounding resistance, determining fault areas.
G01R 31/08 - Localisation de défauts dans les câbles, les lignes de transmission ou les réseaux
G01R 27/20 - Mesure d'une résistance de terreMesure de la résistance de contact de connexions au sol, p. ex. de plaques
G01R 31/52 - Test pour déceler la présence de courts-circuits, de fuites de courant ou de défauts à la terre
H02H 1/00 - Détails de circuits de protection de sécurité
H02H 7/26 - Protection sectionnelle de systèmes de câbles ou de lignes, p. ex. pour déconnecter une section dans laquelle un court-circuit, un défaut à la terre, ou une décharge d'arc se sont produits
H02J 3/36 - Dispositions pour le transfert de puissance électrique entre réseaux à courant alternatif par l'intermédiaire de haute tension à courant continu
60.
Intelligent soft measurement method for wind speed in front of wind turbine
HUANENG GROUP TECHNOLOGY INNOVATION CENTER CO., LTD (Chine)
Inventeur(s)
Hu, Yang
Fang, Fang
Chen, Siqi
Liu, Jizhen
Guo, Xiaojiang
Wang, Qinghua
Abrégé
The present invention discloses an intelligent soft measurement method for wind speed in front of a wind turbine. The method includes: first using laser radar data as a data sample, judging delay orders between input and output by using an AIC or BIC criterion, defining a dynamic difference regression vector according to the delay orders, dividing hyperplanes according to a clustering result by using a machine learning algorithm, and performing dynamic differential input/output nonlinear mapping modeling in a global scope and sub-scopes by using an artificial intelligence dynamic regression algorithm, respectively. Empirical mode decomposition and power spectral density analysis are performed on the wind speed in front of a laser radar measuring machine and the wind speed in front of a soft measurement machine, thereby further verifying the estimation performance of intelligent soft measurement for the wind speed in front of a wind turbine.
G01P 5/26 - Mesure de la vitesse des fluides, p. ex. d'un courant atmosphériqueMesure de la vitesse de corps, p. ex. navires, aéronefs, par rapport à des fluides en mesurant l'influence directe du courant de fluide sur les propriétés d'une onde optique de détection
G01S 17/58 - Systèmes de détermination de la vitesse ou de la trajectoireSystèmes de détermination du sens d'un mouvement
G01S 17/95 - Systèmes lidar, spécialement adaptés pour des applications spécifiques pour la météorologie
61.
Online estimation of POI-level aggregated inertia considering frequency spatial correlation
An exemplary two-step method for power system inertia online estimation is described. The first step is to accurately estimate the POI-level aggregated inertia. The second step is to calculate the system-level inertia constant by weighting all the POI-level aggregated inertia and to monitor the inertia spatial distribution. In one example embodiment, the PMU is installed at POI, the frequency spatial difference is considered, and the mechanical power is carefully treated.
The invention relates to a fault transient features optimization method and system of AC/DC system based on dissipated energy, which belongs to the HVDC transmission technology and is used to solve the problem that the DC pulsed current is too high and the generator power angle swing of the AC system on the rectifier side is too large during the process of the HVDC transmission system restart on fault. The method includes the following steps: obtaining the output current and outlet bus voltage of the generator during the whole process of fault recovery of the AC/DC system under the current control parameters when adjusting the control parameters of the rectifier, and obtain multiple sets of control parameters and their corresponding output current and outlet bus voltage of the generator during the whole process of fault recovery of the AC/DC system; for each set of control parameters, calculating cumulative value of dynamic dissipated energy of the generator under the set of control parameters based on the output current and outlet bus voltage of the generator during the whole process of DC system fault recovery; selecting the set of control parameters that minimizes the cumulative value of dynamic dissipated energy of the generator as the optimal control parameter in the process of fault transient features optimization.
H02M 7/06 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant continu sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge sans électrode de commande ou des dispositifs à semi-conducteurs sans éléctrode de commande
63.
METHOD FOR DYNAMICALLY SIMULATING THERMAL RESPONSE OF BUILDING BY INTEGRATING A RATIO OF CONVECTION HEAT TO RADIATION HEAT OF HEATING TERMINAL
A method for dynamically simulating the thermal response of a building by integrating the ratio of convection heat to radiation heat of heating terminals is provided, and belongs to the technical field of building environments and heating, ventilation, and air conditioning (HVAC) systems. A room thermophysical model of a building to be simulated is constructed. The ratio of radiation heat at the heating terminal is used as a variable in the room heat balance matrix equation, which shows that different heating terminals have different thermal characteristics due to different ratios of convection heat to radiation heat. The room heat balance matrix equation is solved to obtain a room air temperature equation. By integrating a heating-terminal thermal characteristic equation with the room air temperature equation, thermal characteristics of the heating terminals are combined with thermal characteristics of the building, which improves accuracy of dynamic simulation on a heating system.
A method and system for detecting a typical object of a transmission line based on UAV federated learning. The method includes: determining a detection model for a typical object of a transmission line by YOLOv3 object detection algorithm according to a prior database for the typical object; dividing a UAV network into multiple federated learning units; acquiring pictures, taken by the UAV network, of the typical object and tags corresponding to each picture to determine a training database; training, based on Horovod framework and FATE federated learning framework, each federated learning unit according to the training database and the detection model for the typical object, and determining the trained UAV network according to the trained federated learning unit; and determining, by the trained UAV network, the typical object in each picture. A congestion of communication links is avoided, thereby improving detection efficiency.
H01B 7/32 - Conducteurs ou câbles isolés caractérisés par la forme avec dispositions pour détecter des défauts, p. ex. ruptures ou fuites
B64C 39/02 - Aéronefs non prévus ailleurs caractérisés par un emploi spécial
G06V 10/70 - Dispositions pour la reconnaissance ou la compréhension d’images ou de vidéos utilisant la reconnaissance de formes ou l’apprentissage automatique
B64U 101/30 - Véhicules aériens sans pilote spécialement adaptés à des utilisations ou à des applications spécifiques à l’imagerie, à la photographie ou à la vidéographie
65.
Method and system for dispatching independent energy storage power station in typical secondary frequency regulation scenario
A method and a system for dispatching an independent energy storage power station is provided. The method includes: determining the current typical secondary frequency regulation scenario according to the predicted AGC frequency regulation instruction for the next stage; dispatching, for the continuous upward adjustment response scenario, the independent energy storage power station to participate in the upward adjustment response according to the data required for the continuous upward adjustment; dispatching, for the continuous downward adjustment response scenario, the independent energy storage power station to participate in the downward adjustment response according to the data required for the continuous downward adjustment; and preferably, for the upward and downward adjustment fluctuation response scenario, dispatching the independent energy storage power station to participate in the upward and downward adjustment fluctuation response according to the data required for the upward and downward adjustment.
H02J 3/46 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs contrôlant la répartition de puissance entre les générateurs, convertisseurs ou transformateurs
H02J 3/28 - Dispositions pour l'équilibrage de charge dans un réseau par emmagasinage d'énergie
G05B 17/02 - Systèmes impliquant l'usage de modèles ou de simulateurs desdits systèmes électriques
G01R 19/25 - Dispositions pour procéder aux mesures de courant ou de tension ou pour en indiquer l'existence ou le signe utilisant une méthode de mesure numérique
66.
ENERGY FLOW OPTIMIZATION IN MULTI-ENERGY SYSTEM BASED ON SPATIOTEMPORAL NETWORK FLOWS
A method for energy flow optimization in a multi-energy system based on spatiotemporal network flows is disclosed. The multi-energy system includes M energy storage devices, photovoltaic power generators and N micro gas turbines (MGTs). The method includes: obtaining an objective function of the network flows in the multi-energy system; determining constraints of the network flows, where the constraints include a power balance constraint, an energy storage period constraint, an energy storage capacity constraint, an energy storage charging and discharging constraint, a generator power constraint, and an energy storage charge quantity constraint; establishing a network flow model with the objective function and constraints; solving the network flow model with a shortest-path and max-flow algorithm, to obtain an optimal power flow (OPF) in the multi-energy system; operating the multi-energy system by adjusting parameters of the energy storage devices and the MGTs based on the OPF.
State Grid Jibei Electric Power Company Limited (Chine)
Inventeur(s)
Liu, Dunnan
Jia, Heping
Wang, Xuanyuan
Zhang, Hao
Liu, Zhen
Li, Yanbin
Liu, Mingguang
Abrégé
The present invention relates to a reliability calculation method of a power distribution system considering hierarchical decentralized control of demand-side resources, including the following steps: step 1, establishing a multi-state model of wind turbine output and a two-state model of wind turbine failure, which respectively consider randomness of wind speed and uncertainty of wind turbine failure; step 2, establishing a multi-state reliability model of distributed wind power system including a plurality of wind turbines; step 3, establishing a reliability model of information communication system considering hierarchical decentralized control of random failures and information delays; step 4, establishing a reliability model of demand-side resources considering hierarchical decentralized control; and step 5, calculating a value of reliability of a power distribution system considering hierarchical decentralized control of demand-side loads, to acquire an analysis result of the reliability of the power distribution system.
Disclosed is a federated learning-based regional photovoltaic power probability forecasting method, mainly comprising steps of: pinpointing all photovoltaic power stations in a region which participate in a federated learning framework for probability forecasting, collecting information within a period of time and corresponding photovoltaic power variables, and sampling the variables according to time sequence into a sample dataset; processing missing values and outliers in the sample dataset resulting from the step; splitting the sample data set of the photovoltaic power stations into a training set and a testing set according to a preset proportion; normalizing the training set and the testing set, respectively; creating a federated learning framework; building, by a central server, a global forecasting model based on forecast requirements, defining a training error function and a precision requirement, and distributing the network architecture and initialized parameters to all photovoltaic power stations.
G06Q 10/04 - Prévision ou optimisation spécialement adaptées à des fins administratives ou de gestion, p. ex. programmation linéaire ou "problème d’optimisation des stocks"
H02J 3/00 - Circuits pour réseaux principaux ou de distribution, à courant alternatif
69.
PREDICTION METHOD FOR CHARGING LOADS OF ELECTRIC VEHICLES WITH CONSIDERATION OF DATA CORRELATION
State Grid Shanghai Electric Power Company (Chine)
Shanghai Electric Power Trading Center Co.,Ltd. (Chine)
North China Electric Power University (Chine)
State Grid Electric Power Research Institute Co.,Ltd. (Chine)
Beijing KeDong Electric Power Control System Co.,Ltd. (Chine)
State Grid Electric Vehicle Service Company (Chine)
Inventeur(s)
Liu, Dunnan
Liu, Mingguang
Yang, Jing
Shen, Yue
Tao, Li
Liu, Jian
Zhong, Hua
Wang, Wen
Zhang, Qiqi
Weng, Weihua
Wang, Lingxiang
Han, Yingzhu
Zou, Jianye
Du, Xin
Zhang, Lin
Yang, Ye
Su, Shu
Abrégé
A prediction method for charging loads of electric vehicles with consideration of data correlation includes: collecting historical data of the charging loads of the electric vehicles; carrying out data correlation analysis on the historical data of the charging loads of the electric vehicles, and real-time data, and calculating correlation coefficients between the historical data of the charging loads of the electric vehicles and the real-time data; based on the correlation coefficients, selecting historical data of the charging loads of the electric vehicles, which has high correlation, as data of the charging loads of the electric vehicles, which is used for prediction; and predicting the historical data of the charging loads of the electric vehicles, serving as the data of the charging loads of the electric vehicles, which is used for prediction, by adopting an LSTM algorithm, to obtain prediction results.
State Grid Shanghai Electric Power Company (Chine)
Shanghai Electric Power Trading Center Co.,Ltd. (Chine)
North China Electric Power University (Chine)
State Grid Electric Power Research Institute Co., Ltd. (Chine)
Beijing KeDong Electric Power Control System Co., Ltd. (Chine)
State Grid Electric Vehicle Service Company (Chine)
Inventeur(s)
Liu, Dunnan
Liu, Mingguang
Song, Ping
Shen, Yue
Tao, Li
Zhong, Hua
Yu, Tao
Wang, Wen
Chen, Chunyi
Liu, Jian
Zhang, Tingting
Xi, Yue
Zou, Jianye
Du, Xin
Zhang, Lin
Yang, Ye
Su, Shu
Abrégé
A method for optimizing dispatching of charging loads of electric vehicles to promote wind power consumption includes: acquiring blocked electric quantity of wind power at a peak down-regulation period; acquiring a curve of disorderly charging loads of the electric vehicles; establishing a model for optimizing the charging loads of the electric vehicles to promote wind power consumption, wherein an objective function of the model refers to that the electric vehicles participate in wind power consumption to minimize the remaining blocked quantity of the wind power, and the total charging cost of the electric vehicles is lowest, and acquiring constraint conditions of the model; and solving the optimization model by adopting an adaptive mutation particle swarm optimization algorithm, to obtain the target charging/discharging electric quantity and the target charging/discharging power of the electric vehicles.
H02J 3/14 - Circuits pour réseaux principaux ou de distribution, à courant alternatif pour règler la tension dans des réseaux à courant alternatif par changement d'une caractéristique de la charge du réseau par interruption, ou mise en circuit, des charges du réseau, p. ex. charge équilibrée progressivement
Beijing Electric Power Trading Center Co., Ltd (Chine)
North China Electric Power University (Chine)
Inventeur(s)
Song, Li
Liu, Dunnan
Li, Zhu
Zhang, Shengnan
Pang, Bo
Zhao, Ningning
Sun, Tian
Yang, Haiyan
Xu, Xiaofeng
Abrégé
A collaborative aggregation trading method for consuming clean energy includes: acquiring related data of clean energy power generation companies, the demand-side resources and energy storage service providers; acquiring a trading quotation and acquiring self-regulating ability data and regulating fees of shared energy storage service providers; performing trading of collaboratively consuming the clean energy through the demand-side resources and the shared energy storage: when the power generation output value exceeds the maximum regulating ability of user demands and the demand-side resources, storing the redundant power into shared energy storage systems for standby application; when the power generation output value is lower than the minimum operation load level of the user demands and the demand-side resources, calling the shared energy storage service providers participating in the trading according to energy storage ranking indexes, to acquire required power from the shared energy storage systems; and performing fees settlement.
An optimal dispatching method and system for a wind power generation and energy storage combined system are provided. Uncertainty of a wind turbine output is characterized based on spatio-temporal coupling of the wind turbine output and an interval uncertainty set. Compared with a traditional symmetric interval uncertainty set, the uncertainty set that considers spatio-temporal effects effectively excludes some extreme scenarios with a very small probability of occurrence and reduces conservativeness of a model. A two-stage robust optimal dispatching model for the wind power generation and energy storage combined system is constructed, and a linearization technology and a nested column-and-constraint generation (C&CG) strategy are used to efficiently solve the model.
F03D 9/00 - Adaptations des mécanismes moteurs à vent pour une utilisation particulièreCombinaisons des mécanismes moteurs à vent avec les appareils qu’ils entrainentMécanismes moteurs à vent spécialement adaptés à l’installation dans des endroits particuliers
H02P 9/04 - Commande s'exerçant sur un moteur primaire non électrique et dépendant de la valeur d'une caractéristique électrique à la sortie de la génératrice
F03D 17/00 - Surveillance ou test de mécanismes moteurs à vent, p. ex. diagnostics
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
73.
METHOD AND SYSTEM FOR TRAINING DEVICE MODEL OF TARGET DEVICE BY MEANS OF SAMPLE DOPING
A method and system for training a device model of a target device by means of sample doping, the method comprising: acquiring attribute information associated with a device model, and determining, on the basis of the attribute information, at least one sample signal associated with the device model (102); when a target device is in a normal operation state, performing signal collection or signal simulation on the at least one sample signal so as to acquire a normal sample set comprising the at least one sample signal (103); selecting a doping device from among a plurality of devices on the basis of the attribute information, and when the doping device is in a predetermined operation state, performing signal collection or signal simulation on the at least one sample signal so as to obtain a doping sample set (104); by using at least one sample signal in the doping sample set, performing sample signal doping on the corresponding at least one sample signal in the normal sample set so as to obtain an abnormal sample set corresponding to the normal sample set (105); and training the device model on the basis of the normal sample set, the abnormal sample set, and a preset training algorithm so as to obtain a trained device model (106).
A method (100) and system (300) for performing security protection on the basis of real-time vibration/acoustic emission monitoring. The method (100) comprises: acquiring structural configuration information and security level information of a protected device (101); according to a plurality of structural features, determining a plurality of candidate monitoring positions that are located at an outer housing of the protected device (102); selecting a plurality of real-time monitoring positions from among the plurality of candidate monitoring positions, and mounting a vibration/acoustic emission monitoring sensor at each real-time monitoring position in the manner of close attachment to the outer housing (103); driving each vibration/acoustic emission monitoring sensor to establish a communication connection with a monitoring device, such that each vibration/acoustic emission monitoring sensor can send an obtained vibration/acoustic emission monitoring signal to the monitoring device by means of the communication connection (104); driving the monitoring device to establish a control signal connection with a protective device of the protected device, such that the monitoring device can send a control instruction to the protective device by means of the control signal connection (105); and the monitoring device performing real-time calculation on the vibration/acoustic emission monitoring signal that is received from each vibration/acoustic emission monitoring sensor, so as to obtain a calculation result, and when the calculation result satisfies a predetermined condition, the monitoring device sending a control instruction to the protective device by means of the control signal connection, so as to cause the protective device to perform an action, such that the protective device is driven to perform real-time security protection on the protected device on the basis of the action (106).
H02H 7/085 - Circuits de protection de sécurité spécialement adaptés aux machines ou aux appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou de ligne, et effectuant une commutation automatique dans le cas d'un changement indésirable des conditions normales de travail pour moteurs dynamo-électriques contre une charge excessive
G01H 17/00 - Mesure des vibrations mécaniques ou des ondes ultrasonores, sonores ou infrasonores non prévue dans les autres groupes de la présente sous-classe
75.
METHOD AND SYSTEM FOR TRAINING TARGET MODEL ON THE BASIS OF MODIFICATION OF SAMPLE SIGNAL
A method and system for training a target model on the basis of modification of a sample signal. The method comprises: selecting, from a plurality of models, a target model which needs to be trained, and obtaining a configuration file for the target model (101); determining an object device related to the target model on the basis of the configuration file for the target model, and determining a plurality of sample signals associated with the object device (102); when the object device operates normally, performing signal acquisition or signal simulation on at least two sample signals in the plurality of sample signals so as to obtain a normal sample set comprising the at least two sample signals (103); modifying at least one sample signal in the normal sample set according to a preset modification mode to obtain an abnormal sample set corresponding to the normal sample set (104); and training the target model on the basis of the normal sample set, the abnormal sample set, and a preset training algorithm to obtain a trained target model (105).
G06K 9/62 - Méthodes ou dispositions pour la reconnaissance utilisant des moyens électroniques
G06K 9/00 - Méthodes ou dispositions pour la lecture ou la reconnaissance de caractères imprimés ou écrits ou pour la reconnaissance de formes, p.ex. d'empreintes digitales
The application relates to an oscillation active damping control method and system for grid-tied type-4 wind turbine generator. The method comprises: based on an interconnection model of multiple subsystems, constructing a stored energy function and a dissipated energy function of a current inner loop control subsystem, and interaction energy functions between the current inner loop control subsystem and other subsystems are constructed, then establishing an energy feedback model of Type-4 wind turbine generator; when the oscillation occurs, obtaining instantaneous angular frequency of the PLL, and then based on the energy feedback model, adjusting the current reference value of the q-axis current inner loop generated by the reactive power outer loop control subsystem, to make the stored energy function decrease with time, so as to suppress the oscillation.
H02J 3/02 - Circuits pour réseaux principaux ou de distribution, à courant alternatif utilisant un réseau unique pour distribution simultanée de puissance à différentes fréquencesCircuits pour réseaux principaux ou de distribution, à courant alternatif utilisant un réseau unique pour distribution simultanée de puissance à courant alternatif et à courant continu
G05B 19/042 - Commande à programme autre que la commande numérique, c.-à-d. dans des automatismes à séquence ou dans des automates à logique utilisant des processeurs numériques
H02J 3/24 - Dispositions pour empêcher ou réduire les oscillations de puissance dans les réseaux
H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs
77.
Clustering and routing method and system for wireless sensor networks
Disclosed are a clustering and routing method and system for a wireless sensor network. The method includes: constructing an initial MECPT; constructing cluster trees and updating MECPT; calculating clustering competition coefficients of existing cluster heads relative to nodes other than a base station; determining whether the clustering competition coefficients are all −∞; if yes, enabling non-clustered nodes to communicate with the base station following paths in the initial MECPT, and selecting child nodes of the base station in the initial MECPT as relay nodes; calculating weights about energy consumption of communication between the cluster heads and the relay nodes to get communication paths between nodes and the base station; or if no, clustering nodes based on the clustering competition coefficients, and updating the MECPT and cluster trees to which the nodes are added by an iteration process.
A general decoupling method and system for electromagnetic transient simulation of a VSC are provided. The method includes: determining state equations of equivalent circuits and switch state tables of different VSCs; splitting the state equations, and decoupling and delaying capacitor elements and inductor elements to determine split equations; determining a recurrence relation of a state variable group with respect to a time sequence based on each split equation; obtaining a topological structure of a to-be-simulated VSC, and determining a decoupling model circuit; determining a switch state of the to-be-simulated VSC at a current simulation moment, and constructing a final decoupling model circuit; determining an external port voltage based on the final decoupling model circuit; and updating the state variable group at the current simulation moment based on the external port voltage and the parameters of the decoupling model circuit corresponding to the switch state.
G06F 30/367 - Vérification de la conception, p. ex. par simulation, programme de simulation avec emphase de circuit intégré [SPICE], méthodes directes ou de relaxation
State Grid Electric Vehicle Service Co., Ltd (Chine)
Inventeur(s)
Liu, Mingguang
Zou, Mengjiao
Liu, Dunnan
Wang, Wen
Peng, Xiaofeng
Zhang, Yue
Yang, Ye
Wang, Jun
Jia, Heping
Su, Shu
Zhang, Tingting
Wang, Lingxiang
Shang, Shanshan
Abrégé
Disclosed is a prediction method and device for a clearing price of an auxiliary service for peak regulation, including: acquiring continuous N days of historical data of clearing prices of an auxiliary service market for peak regulation and respectively moving data of original clearing prices forwards by 1, 2, . . . k days, so as to obtain D−1, D−2 . . . D−k data columns; performing first-round training and prediction by adopting a BP (Back Propagation) neural network, a BP neural network optimized by a PSO (Particle Swarm Optimization) algorithm and an LSSVM (Least Square Support Vector Machine), and forming a BP-expansion column, a PSO_BP-expansion column and an LSSVM-expansion column; training the BP neural network by taking first N−k days of time points and D−1, D−2 . . . D−k clearing prices, the BP-expansion column, the PSO_BP-expansion column, the LSSVM-expansion column and the original clearing prices as training data; and performing prediction for the clearing price.
SINOMA JIANGXI INSULATOR AND ELECTRICITY CO., LTD. (Chine)
Inventeur(s)
Lu, Licheng
Yan, Faqiang
Qi, Bo
Chong, Zhiyi
Li, Chengrong
Guo, Zhijun
Yang, Xiao
Ding, Yanxia
Abrégé
A post insulator includes an insulating post including a first end and a second end that are opposite to each other, a high-voltage-end grading ring connected to the first end of the insulating post, the high-voltage-end grading ring being insulated from the insulating post, a grounding-end grading ring connected to the second end of the insulating post, the grounding-end grading ring being insulated from the insulating post, and a charge control ring disposed on an outer surface of the insulating post, the charge control ring being insulated from the insulating post, and the charge control ring being configured to accumulate surface charges.
H01B 17/32 - Isolateurs simples constitués par au moins deux corps isolants dissemblables
H01B 17/42 - Moyens pour obtenir une distribution améliorée de la tensionProtection contre la décharge en arc
H02J 3/36 - Dispositions pour le transfert de puissance électrique entre réseaux à courant alternatif par l'intermédiaire de haute tension à courant continu
81.
Wind power consumption method of virtual power plant with consideration of comprehensive demand responses of electrical loads and heat loads
The present invention discloses a wind power consumption method of a virtual power plant with consideration of comprehensive demand responses of electrical loads and heat loads, which comprises: establishing a wind turbine output model, so as to obtain a wind power prediction curve; establishing heat load demand models before/after demand responses and heat supply equipment output models before/after the demand responses, so as to obtain the abandoned wind quantities per moment before/after the demand responses and the total abandoned wind quantities before/after the demand responses; judging that whether consumption is promoted or not according to the total abandoned wind quantities before/after the demand responses; and establishing a storage battery capacity model and judging the charging/discharging state and the charging/discharging capacity of a storage battery.
F03D 7/02 - Commande des mécanismes moteurs à vent les mécanismes moteurs à vent ayant l'axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
H02J 3/00 - Circuits pour réseaux principaux ou de distribution, à courant alternatif
H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs
F03D 9/22 - Mécanismes moteurs à vent caractérisés par l’appareil entrainé l’appareil produisant de la chaleur
F03D 9/25 - Mécanismes moteurs à vent caractérisés par l’appareil entrainé l’appareil étant un générateur électrique
82.
SYSTEM AND METHOD FOR MONITORING ABNORMAL STATE BASED ON PROGRESSIVE IDENTIFICATION
The present invention relates to a system and method for monitoring an abnormal state based on progressive identification. The system comprises at least one monitoring terminal for monitoring an operation state of a target device to be monitored in real time, wherein each monitoring terminal comprises: at least one signal sensor for monitoring a device signal of the target device during operation; and an information processing server communicating with at least one monitoring terminal by means of a wire communication link and/or a wireless communication link, and receiving the device signal from at least one monitoring terminal based on the wire communication link and/or the wireless communication link. A special identification assembly associated with the target device is selected from a plurality of special identification assemblies, and the device signal is identified by using the special identification assembly, so as to determine whether the target device is in an abnormal state based on an identification result; and the device signal is identified by using a common identification assembly, so as to determine abnormality information of the target device in the abnormal state.
G06K 9/00 - Méthodes ou dispositions pour la lecture ou la reconnaissance de caractères imprimés ou écrits ou pour la reconnaissance de formes, p.ex. d'empreintes digitales
83.
SYSTEM AND METHOD FOR MONITORING ABNORMAL STATE ON BASIS OF IMPACT EVENT
Provided are a system and method for monitoring an abnormal state on the basis of a impact event, said system comprising: at least one monitoring terminal, used for real-time monitoring of the operational state of a target device to be monitored; each monitoring terminal comprises: at least one signal sensor, a sampling unit, a communication unit, and a control unit. An information processing server or the monitoring terminals are able to determine device feature data, environmental feature data, and/or input feature data, and, according to the device feature data, environmental feature data, and/or input feature data, determine whether an impact event associated with the target device has occurred; if it is determined that an impact event associated with the target device has occurred, then determining the point in time when the impact event occurred, and identifying the device feature data, environmental feature data, and/or input feature data to detect the abnormality information of the target device on the basis of the result of identification.
G06K 9/00 - Méthodes ou dispositions pour la lecture ou la reconnaissance de caractères imprimés ou écrits ou pour la reconnaissance de formes, p.ex. d'empreintes digitales
G06N 3/04 - Architecture, p. ex. topologie d'interconnexion
84.
SYSTEM AND METHOD FOR MONITORING ABNORMAL STATE ON THE BASIS OF VOICEPRINT DIAGNOSIS
A system and a method for monitoring an abnormal state on the basis of voiceprint diagnosis. Said system comprises: at least one monitoring terminal (201, 202, 203), used for monitoring an operation state of a target device to be monitored in real time, wherein each monitoring terminal (201, 202, 203) comprises: at least one voiceprint sensor used for monitoring a vibration signal/sound signal transmitted in the target device, or used for monitoring a vibration signal/sound signal transmitted in a medium; each monitoring terminal (201, 202, 203) and/or an information processing server obtains first-type sampling information according to the acquired vibration signal/sound signal transmitted in the target device, or obtains second-type sampling information according to the acquired vibration signal/sound signal transmitted in the medium; and each monitoring terminal (201, 202, 203) and/or the information processing server can determine an abnormal condition of the target device on the basis of the first-type sampling information and/or the second-type sampling information.
The invention relates to an optimal allocation method for stored energy coordinating electric vehicles (EVs) to participate in auxiliary service market (ASM), including the following steps: 1. Predict the reported capacity of daily 96 points for EVs to participate in the ASM by least square support vector machine (LSSVM). 2. Fit the daily total load distribution of EVs. 3. Determine the error distribution between the reported capacity and the actual response capacity, and simulate the total daily load capacity of EVs in the future with Monte Carlo method. 4. Calculate the energy storage capacity required by EVs daily participating in ASM. 5. Build the objective function to minimize the scheduling risk of auxiliary service. 6. Solve the energy storage model in step 5 with particle swarm optimization (PSO), and output the configuration results of optimal energy storage capacity and energy storage power. The invention can improve the adjustable capacity of EVs participating in ASM.
G06F 30/27 - Optimisation, vérification ou simulation de l’objet conçu utilisant l’apprentissage automatique, p. ex. l’intelligence artificielle, les réseaux neuronaux, les machines à support de vecteur [MSV] ou l’apprentissage d’un modèle
B60L 58/10 - Procédés ou agencements de circuits pour surveiller ou commander des batteries ou des piles à combustible, spécialement adaptés pour des véhicules électriques pour la surveillance et la commande des batteries
B60L 58/14 - Procédés ou agencements de circuits pour surveiller ou commander des batteries ou des piles à combustible, spécialement adaptés pour des véhicules électriques pour la surveillance et la commande des batteries en fonction de l'état de charge [SoC] empêchant les décharges excessives
B60L 58/16 - Procédés ou agencements de circuits pour surveiller ou commander des batteries ou des piles à combustible, spécialement adaptés pour des véhicules électriques pour la surveillance et la commande des batteries en fonction du vieillissement de la batterie, p. ex. du nombre de cycles de charge ou de l'état de santé [SoH]
G06F 30/25 - Optimisation, vérification ou simulation de l’objet conçu utilisant des méthodes basées sur les particules
G06F 119/06 - Analyse de puissance ou optimisation de puissance
G06N 3/006 - Vie artificielle, c.-à-d. agencements informatiques simulant la vie fondés sur des formes de vie individuelles ou collectives simulées et virtuelles, p. ex. simulations sociales ou optimisation par essaims particulaires [PSO]
G06N 5/01 - Techniques de recherche dynamiqueHeuristiquesArbres dynamiquesSéparation et évaluation
G06N 7/01 - Modèles graphiques probabilistes, p. ex. réseaux probabilistes
G06N 20/10 - Apprentissage automatique utilisant des méthodes à noyaux, p. ex. séparateurs à vaste marge [SVM]
G06Q 10/0631 - Planification, affectation, distribution ou ordonnancement de ressources d’entreprises ou d’organisations
G06Q 10/0635 - Analyse des risques liés aux activités d’entreprises ou d’organisations
H02J 3/32 - Dispositions pour l'équilibrage de charge dans un réseau par emmagasinage d'énergie utilisant des batteries avec moyens de conversion
B60L 55/00 - Dispositions relatives à la fourniture d'énergie emmagasinée dans un véhicule à un réseau électrique, c.-à-d. du véhicule au réseau [V2G]
G06F 111/06 - Optimisation multi-objectif, p. ex. optimisation de Pareto utilisant le recuit simulé, les algorithmes de colonies de fourmis ou les algorithmes génétiques
G06Q 10/04 - Prévision ou optimisation spécialement adaptées à des fins administratives ou de gestion, p. ex. programmation linéaire ou "problème d’optimisation des stocks"
86.
Resampling technique for arbitrary sampling rate conversion
A resampling method based on window function for flexible sampling rate conversion in broadband frequency measurement devices is described. The resampling algorithm can satisfy the requirements of different sampling rates. The frequency responses of the filter in the resampling model based on the Farrow structure are analyzed, and the design criterion of the filter in resampling model is considered. A fractional delay filter design model based on window function method is described. A fractional delay filter matrix, which is expressed by polynomial form, is constructed. Then the expression related to subfilter coefficients is obtained and subfilter coefficients are solved for by the least square method.
G06F 17/17 - Évaluation de fonctions par des procédés d'approximation, p. ex. par interpolation ou extrapolation, par lissage ou par le procédé des moindres carrés
87.
METHOD AND DEVICE FOR CLUSTERING FORECASTING OF ELECTRIC VEHICLE CHARGING LOAD
STATE GRID ELECTRIC VEHICLE SERVICE CO., LTD. (Chine)
Inventeur(s)
Liu, Dunnan
Liu, Mingguang
Peng, Xiaofeng
Wang, Wen
Zhang, Yue
Yang, Ye
Zou, Mengjiao
Jia, Heping
Bai, Desheng
Su, Shu
Abrégé
The present disclosure relates to a method for clustering forecasting of the electric vehicle charging load, comprising the following steps: collecting electric vehicle charging load data on a historical date and weather information data related to that historical date; preprocessing and then normalizing the collected data to obtain a new data set; performing fuzzy C-means clustering on the normalized data, and taking an actual load measurement point as a fuzzy clustering index to construct a similar daily load set of the date to be forecast; according to the similar daily load set, constructing and training a least-square SVM (support vector machine) forecasting model; inputting load values at the same time in three days ahead of the date to be forecast and the weather information data related to the three days into the trained least-square SVM forecasting model, and outputting a forecast load.
A system and a method for fault location in a long-distance transmission facility. Said system comprises at least two monitoring terminals and an information processing server; the at least two monitoring terminals are installed at different positions of a cable, and the monitoring terminals each comprise a sensor, a sampling unit, a timing unit, a communication unit and a control unit; the sensors of the monitoring terminals are closely attached to the surface of the cable to monitor vibration signals/sound signals transmitted by the cable, and/or the sensors are placed in air near the cable to monitor vibration signals/sound signals transmitted by air; and the monitoring terminals achieve synchronous timing by means of pre-calibration or on-line calibration. The monitoring terminals or the information processing server determine(s) the position of a fault according to the positions of different sensors and the time corresponding to vibration signal/sound signals of the fault detected by the sensors.
G01R 31/08 - Localisation de défauts dans les câbles, les lignes de transmission ou les réseaux
G01H 17/00 - Mesure des vibrations mécaniques ou des ondes ultrasonores, sonores ou infrasonores non prévue dans les autres groupes de la présente sous-classe
G08C 17/02 - Dispositions pour transmettre des signaux caractérisées par l'utilisation d'une voie électrique sans fil utilisant une voie radio
G08C 19/00 - Systèmes de transmission de signaux électriques
A synchrophasor measurement-based disturbance identification method is described considering different penetration levels of renewable energy. A differential Teager-Kaiser energy operator (dTKEO)-based algorithm is first utilized to improve multiple-disturbances detection accuracy. Then, feature extractions via the integrated additive angular margin (AAM) loss and the long short-term memory (LSTM) network is described. This enables one to deal with intra-class similarity and inter-class variance of disturbances when high penetration renewable energy occurs. With the extracted features, a multi-stage weighted summing (MSWS) loss-based criterion is described for adaptive data window determination and fast disturbance pre-classification. Finally, the re-identification model based on feature similarity is established to identify unknown disturbances, a challenge for existing machine learning algorithms.
G06K 9/00 - Méthodes ou dispositions pour la lecture ou la reconnaissance de caractères imprimés ou écrits ou pour la reconnaissance de formes, p.ex. d'empreintes digitales
90.
Method and system of hybrid data-and-model-driven hierarchical network reconfiguration
A method and a system of hybrid data-and-model-driven hierarchical network reconfiguration are provided. Taking into account that the optimal operation structure of the power grid may change after a new energy is connected into the power grid in the distribution manner, this method combines the mathematical model of network reconfiguration and clustering with the deep learning model, and uses data recorded by the smart meter, to reconfigure the network in a hybrid data-and-model driving mode. This method proposes a network compression method and a hierarchical decompression method based on deep learning, and improves the efficiency of network reconfiguration by the way of distributed calculation and combination of on-line and off-line calculation.
H04L 41/0833 - Réglages de configuration caractérisés par les objectifs d’un changement de paramètres, p. ex. l’optimisation de la configuration pour améliorer la fiabilité pour la réduction de la consommation d’énergie du réseau
Provided is an optimization and regulation method and system for an thermoelectric heat pump-thermoelectricity combined system, relating to the technical field of energy operation. All units are considered as different main bodies, and regulation is performed by taking the benefit maximization of each main body as a target, not only meeting the load demand of a thermoelectricity user, but also enabling the unit main bodies to be satisfied with the respective revenues to the maximum extent. The method comprises: S1, establishing a composition structure frame of the thermoelectric heat pump-thermoelectricity combined system, and establishing an output model of each unit; S2, establishing a revenue function model of each unit in the thermoelectric heat pump-thermoelectricity combined system; S3, establishing a non-cooperative game model of the thermoelectric heat pump-thermoelectricity combined system; and S4, solving the game model by using a particle swarm optimization to obtain a thermoelectricity scheduling optimization solution of each unit. The provided technical solution is suitable for the regulation process of a thermoelectric heat pump-thermoelectricity combined system.
G06Q 10/04 - Prévision ou optimisation spécialement adaptées à des fins administratives ou de gestion, p. ex. programmation linéaire ou "problème d’optimisation des stocks"
G06Q 10/06 - Ressources, gestion de tâches, des ressources humaines ou de projetsPlanification d’entreprise ou d’organisationModélisation d’entreprise ou d’organisation
H02J 3/46 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs contrôlant la répartition de puissance entre les générateurs, convertisseurs ou transformateurs
92.
Optimized regulating and controlling method and system for integrated electricity and heat system with heat pumps
The present application provides an optimized regulating and controlling method and system for an integrated electricity and heat system with heat pumps, relating to the technical field of energy operation. According to the present application, regulating and controlling can be performed by regarding units as different agents and taking maximization of the self-interest of each agent as the objective, so that the load demands of heat and power consumers can be met, and each unit agent can be satisfied with its payoff to the greatest extent. The method includes: S1. establishing a composition and structure framework of the integrated electricity and heat system with heat pumps, and establishing an output model of each unit; S2. establishing a payoff function model of each unit in the integrated electricity and heat system with heat pumps; S3. establishing a non-cooperative game model of the integrated electricity and heat system with heat pumps; and S4. solving the game model by using a particle swarm optimization algorithm to obtain a heat and power scheduling optimization scheme of each unit. The technical solution provided by the present application is applicable to a process of regulating an integrated electricity and heat system with heat pumps.
F24F 11/46 - Amélioration de l’efficacité électrique ou économie d’énergie électrique
G05B 13/04 - Systèmes de commande adaptatifs, c.-à-d. systèmes se réglant eux-mêmes automatiquement pour obtenir un rendement optimal suivant un critère prédéterminé électriques impliquant l'usage de modèles ou de simulateurs
G06F 30/25 - Optimisation, vérification ou simulation de l’objet conçu utilisant des méthodes basées sur les particules
G06Q 10/04 - Prévision ou optimisation spécialement adaptées à des fins administratives ou de gestion, p. ex. programmation linéaire ou "problème d’optimisation des stocks"
G06Q 10/0631 - Planification, affectation, distribution ou ordonnancement de ressources d’entreprises ou d’organisations
H02J 3/32 - Dispositions pour l'équilibrage de charge dans un réseau par emmagasinage d'énergie utilisant des batteries avec moyens de conversion
H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs
H02J 3/46 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs contrôlant la répartition de puissance entre les générateurs, convertisseurs ou transformateurs
Disclosed is a reversible multi-stage dual-link alternate isothermal gas compression system. Said system is composed of two or more liquid piston units (D1, D2, D3) which have different pressure resistance levels, and have effective capacities decreasing stage by stage as the pressure increases; each of the liquid piston units (D1, D2, D3) is composed of two vessels, i.e., a pressure vessel A and a pressure vessel B which have the same pressure resistance level and the same capacity, and a liquid drive device L between the pressure vessels; and during a compression and energy storage process, under the drive of power devices (M), said system compresses and migrates low-pressure gas stage by stage, and finally sends same to a gas storage system (S) or high-pressure gas pipelines (G7, G8); and during an expansion and energy release process, high-pressure gas expands stage by stage and drives the power devices (M) to work to the outside. In the compression or expansion process, liquid is always controlled to reciprocate between two pressure vessels of a single-stage liquid piston unit (D1, D2, D3), so as to reduce the corresponding amount of dissolved gas, achieving compression-while-migration of inter-stage gas between different liquid piston units (D1, D2, D3), reducing the operation time, increasing the working efficiency, and reducing the loss.
STATE GRID GANSU ELECTRIC POWER CORPORATION (Chine)
ECONOMY AND TECHNOLOGY RESEARCH INSTITUTE, GANSU ELECTRIC POWER CORPORATION, STATE GRID (Chine)
NORTH CHINA ELECTRIC POWER UNIVERSITY (Chine)
Inventeur(s)
Yang, Dezhou
Wang, Yunzhong
Xia, Yi
Wang, Fei
Li, Wanwei
Li, Zhenghui
Wei, Yong
Hu, Anlong
Xue, Guobin
Li, Huiyong
Li, Min
Peng, Jing
Liang, Kui
Ping, Chang
Wan, Xiaohua
Han, Jianfeng
Chen, Qingsheng
Li, Yuke
Li, Linhe
Yang, Changhai
Zhang, Zhongdan
Tian, Yunfei
Song, Wenqin
Li, Kangping
Feng, Yanjun
Zhang, Jianhui
Zhen, Zhao
Wang, Zhongfei
Xue, Yuantian
Liang, Congbin
Wang, Junjie
Ren, Hui
Abrégé
An urban complex electricity consumption prediction method and apparatus, an electronic device, and a storage medium. The method comprises: acquiring historical hourly electricity consumption sequences of each type of electricity consumption entities in an urban complex (101); performing splitting and dimensionality reduction on the historical hourly electricity consumption sequences according to preset calendar tabs to obtain first electricity consumption sequences for the calendar tabs (102); performing non-linear dimensionality reduction on the first electricity consumption sequences in a time dimension to obtain second electricity consumption sequences (103); inputting the second electricity consumption sequences into a preset predictive neural network for prediction to obtain a first electricity consumption prediction result based on the calendar tabs (104); and obtaining an electricity consumption prediction result of the complex by calculation on the basis of the first electricity consumption prediction result (105). The electricity consumption prediction result of the urban complex can thus be more accurate.
G06Q 10/04 - Prévision ou optimisation spécialement adaptées à des fins administratives ou de gestion, p. ex. programmation linéaire ou "problème d’optimisation des stocks"
A power margin tracking control method and system for a multi-terminal high-voltage direct current converter station are provided. A power adjustment factor is introduced on the basis of a droop coefficient, to realize a self-adaptive regulation of a converter station operation mode to a real-time fluctuation of a wind and solar power. In this way, the system operation stability and the power fluctuation allocation capability in a grid-connected system are improved. Furthermore, a DC voltage deviation in the multi-terminal high-voltage direct current grid is reduced.
H02J 3/36 - Dispositions pour le transfert de puissance électrique entre réseaux à courant alternatif par l'intermédiaire de haute tension à courant continu
H02J 3/24 - Dispositions pour empêcher ou réduire les oscillations de puissance dans les réseaux
A data-driven PMU bad data detection algorithm based on spectral clustering using single PMU data is described. The described algorithm does not require the system topology and parameters. First, a data identification method based on a decision tree is described to distinguish event data and bad data by using the slope feature of each set of data. Then, a bad data detection method based on spectral clustering is described. By analyzing the weighted relationships among all the data, this method can detect the bad data that has a small deviation.
G06K 9/62 - Méthodes ou dispositions pour la reconnaissance utilisant des moyens électroniques
G06N 5/00 - Agencements informatiques utilisant des modèles fondés sur la connaissance
G01R 19/25 - Dispositions pour procéder aux mesures de courant ou de tension ou pour en indiquer l'existence ou le signe utilisant une méthode de mesure numérique
97.
Method and system for evaluating stability of HVDC receiving end system, and storage medium
The disclosure relates to a method and system for evaluating the stability of HVDC receiving end system and storage medium, which relates to the technical field of high voltage direct current transmission. The method includes: collecting voltage at a generator port, current at the generator port and rotational speed of the generator after eliminating fault; determining a corresponding relationship between the generator dynamic energy and the time according to the voltage at the generator port, the current at the generator port and the rotational speed of the generator; determining the attenuation intensity of the generator dynamic energy according to the corresponding relationship between the generator dynamic energy and the time; determining stability of the HVDC receiving end system according to the attenuation intensity of the generator dynamic energy.
H02J 3/36 - Dispositions pour le transfert de puissance électrique entre réseaux à courant alternatif par l'intermédiaire de haute tension à courant continu
H02M 7/757 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant continuTransformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif avec possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type thyratron ou thyristor exigeant des moyens d'extinction utilisant uniquement des dispositifs à semi-conducteurs
H02J 3/00 - Circuits pour réseaux principaux ou de distribution, à courant alternatif
H02P 9/10 - Commande s'exerçant sur le circuit d'excitation de la génératrice afin de réduire les effets nuisibles de surcharges ou de phénomènes transitoires, p. ex. application, suppression ou changement brutal de la charge
G01R 31/42 - Tests d'alimentation d'alimentations en courant alternatif
98.
Method and system for AC line distance protection in AC/DC hybrid power grid, and storage medium
The disclosure relates to a method and system for AC line distance protection in AC/DC hybrid power grid, and storage medium. The method comprises: collecting the operation parameters of inverter-side converter, AC parameters, converter bus voltage, current at distance protection installation and operation parameters of the smoothing reactor of inverter station; determining the conduction state of the inverter-side converter according to the operation parameters of the inverter-side converter; determining the current fed into the AC system from the DC system corresponding to the conduction state according to the operation parameters of the inverter-side converter, the operation parameters of the smoothing reactor of the inverter station and the converter bus voltage; determining the virtual fault location and virtual transition resistance according to fault types and AC parameters; controlling the corresponding protection device to perform the protection action according to the virtual fault location and virtual transition resistance.
H02J 3/00 - Circuits pour réseaux principaux ou de distribution, à courant alternatif
H02J 3/36 - Dispositions pour le transfert de puissance électrique entre réseaux à courant alternatif par l'intermédiaire de haute tension à courant continu
H02M 1/32 - Moyens pour protéger les convertisseurs autrement que par mise hors circuit automatique
99.
Commutation failure prediction method, device and storage medium based on energy accumulation features of inverter
The disclosure discloses a commutation failure prediction method, device and storage medium based on energy accumulation features of inverter. The method includes the following steps: collecting instantaneous values of three-phase valve side current and calculating the derivatives of the three-phase valve side current according to the instantaneous values of three-phase valve side current; the derivative includes positive, negative and zero states; according to the derivatives of the three-phase valve side current, determining the locations of incoming valve and ongoing valve; based on the valve side current of the incoming valve and ongoing valve, calculating energy accumulation features of the 12-pulse inverter; predicting whether the commutation failure from the incoming valve to the ongoing valve will happen according to the states of the derivatives of the three-phase valve side current and the energy accumulation features of the 12-pulse inverter.
H02J 3/36 - Dispositions pour le transfert de puissance électrique entre réseaux à courant alternatif par l'intermédiaire de haute tension à courant continu
H02J 3/00 - Circuits pour réseaux principaux ou de distribution, à courant alternatif
100.
Single-phase reclosing method, device and storage medium for AC/DC system
The present disclosure is directed to a single-phase reclosing method, device and storage medium for AC/DC system. The method comprises: acquiring three-phase voltages at inverter-side AC bus close to the transformer, three-phase currents measured at the outlet of inverter-side AC line and three-phase voltages at inverter-side AC bus far from the transformer; calculating the energy calculation value and energy operation value of the fault line; identifying the fault nature of fault line within the maximum time delay, according to the energy calculation value and energy operation value of fault line and an energy criterion of transient/permanent fault; issuing a reclosing control signal based on the fault nature of fault line to realize effective reclosing of the fault line.
H02H 7/125 - Circuits de protection de sécurité spécialement adaptés aux machines ou aux appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou de ligne, et effectuant une commutation automatique dans le cas d'un changement indésirable des conditions normales de travail pour convertisseursCircuits de protection de sécurité spécialement adaptés aux machines ou aux appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou de ligne, et effectuant une commutation automatique dans le cas d'un changement indésirable des conditions normales de travail pour redresseurs pour convertisseurs ou redresseurs statiques pour redresseurs
H02H 1/00 - Détails de circuits de protection de sécurité
brevets
