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183 results about "Distributed generation" patented technology

Distributed generation, also distributed energy, on-site generation (OSG) or district/decentralized energy is electrical generation and storage performed by a variety of small, grid-connected or distribution system connected devices referred to as distributed energy resources (DER).

Multi-level coordinated voltage control method and system for power distribution network based on three-tier priority objectives

The present application provides a multi-level coordinated voltage control method and system for a power distribution network based on three-tier priority objectives. The method comprises: acquiring operation parameters of a power distribution network; on the basis of the operation parameters of the power distribution network and a pre-constructed three-tier optimization objective planning model, using an affine theory, a duality theory, and power circle linearization and absolute value linearization methods to solve the three-tier optimization objective planning model to obtain maximization of an admissible net-load disturbance domain at each node, minimization of the total operation cost of the power distribution network and minimization of an expected voltage deviation; and performing coordinated control on various reactive devices of the power distribution network by means of the operation parameters of the power distribution network corresponding to the maximization of the admissible net-load disturbance domain at each node, the minimization of the total operation cost of the power distribution network and the minimization of the expected voltage deviation. The present application can more clearly characterize the uncertainty of distributed generation power output and the impact of the distributed generation power output on system reserve capacity, and mitigate the problems of ambiguous characterization of distributed generation power output characteristics, and multi-level voltage violation and voltage fluctuation of the power distribution network caused by large-scale distributed generation integration.
Owner:CHINA ELECTRIC POWER RESEARCH INSTITUTE CO LTD +2

Power marketization operation optimization method and system based on user side resource aggregation

The invention relates to the field of intelligent power grids, and discloses an electric power marketization operation optimization method and system based on user-side resource aggregation, and the method comprises the following steps: a), recognizing and classifying user-side resources, specifically including distributed power generation, energy storage equipment and adjustable loads, forming a user-side resource database, and facilitating the subsequent management and scheduling; b) formulating transaction rules of market participants, and determining participation conditions, rights and obligations of household users, small commercial users and large industrial users to ensure fair participation of various users in the market; and c) automatically executing the transaction through the smart contract. Through user side resource aggregation, the method can effectively integrate distributed power generation, an energy storage system and an adjustable load, optimizes supply and demand balance of power, and enables a user to adjust a power utilization strategy in different demand time periods through a real-time monitoring and dynamic pricing mechanism, thereby reducing resource waste and improving the overall efficiency of a power system.
Owner:国网山东综合能源服务有限公司

Modularized distributed photovoltaic inverter cluster intelligent regulation and control system

The invention, which relates to the technical field of distributed power generation, discloses a modularized distributed photovoltaic inverter cluster intelligent regulation and control system comprising an impedance identification module, an impedance control module, a state sensing module, a fault diagnosis and isolation module, a power distribution module and a cluster fault control module. The power grid impedance monitoring module is used for monitoring voltage and current signals of a grid-connected point of the photovoltaic inverter, calculating a power grid equivalent impedance value, an impedance change trend and a harmonic component proportion of the current photovoltaic inverter, and generating power grid impedance information. The impedance identification module and the impedance control module are arranged, adjustment is carried out based on the virtual impedance parameters, the resonance problem caused by power grid impedance fluctuation is effectively suppressed, the situation that grid-connected current distortion affects the electric energy quality is avoided, the photovoltaic inverter cluster stably operates in a power grid impedance change scene, and the power grid impedance change efficiency is improved. And the cluster grid-connected power quality and the adaptability to the power grid environment are improved.
Owner:MANGO TECH CO LTD

Traffic junction multi-business micro-energy network chain type interconnection architecture

The invention relates to a transportation junction multi-business micro-energy network chain-type interconnection architecture, and the architecture comprises a load layer which comprises micro-energy networks of different business forms; the energy layer comprises an external energy source and a distributed power generation and energy storage system and is used for providing comprehensive energy supply for energy consumption requirements of the micro-energy grids in different commercial forms in the load layer; the energy network layer comprises different types of energy networks, the different types of energy networks carry out coupling conversion on energy of the energy layer so as to meet the energy use requirements of micro energy networks in different business states in the load layer, and coupling interaction and interconnection intercommunication between the different types of energy networks are achieved through different types of energy conversion equipment; and the cloud edge-end energy collaborative management and control system is used for regulating and controlling the energy layer, the energy network layer and the load layer by utilizing a cloud-edge-end three-layer management and control architecture so as to realize the collaboration and dynamic balance of multiple energy flows among different regions of the transportation hub.
Owner:STATE GRID SHANGHAI ENERGY INTERCONNECTION RES INST CO LTD

Network security monitoring method and system based on Internet of Things

The invention discloses a network security monitoring method and system based on the Internet of Things, and relates to the technical field of Internet of Things security. Through dynamic challenge-response physical unclonable authentication, physical parameters and a real-time state are fused to generate a dynamic challenge value, and a physical unclonable function circuit is combined to generate a response value to realize identity verification; adaptive noise lattice-based homomorphic encryption is adopted, a ciphertext is generated based on a high-dimensional lattice-based password, and noise parameters are adjusted through channel quality to guarantee transmission security; multi-modal confrontation federated learning anomaly detection is utilized, flow, energy consumption and physical state characteristics are fused, and parameters are aggregated through a confrontation auto-encoder training model and based on federated learning; through dynamic threshold key negotiation, in combination with identity-based encryption and a block chain smart contract, distributed generation and dynamic adjustment of a key are realized; on the basis of a Merkle-salt value dynamic hash chain and block chain evidence storage, a log is generated in a trusted execution environment, a hash chain is constructed, and chain tail hash is synchronized to block chain evidence storage.
Owner:JIAYUGUAN JINNUOYI SUPPLY CHAIN CO LTD

Point-to-point energy transaction method and system based on virtual community and distributed power generation

The invention discloses a point-to-point energy transaction method and system based on a virtual community and distributed power generation, and relates to the technical field of intelligent power grids, and the method comprises the steps: building a building model, and enabling the building model to be aggregated into a virtual community model according to the position of a power distribution network; establishing a distributed power generation model, and introducing a distributed power generation source into the virtual community model; when the virtual community and the distributed power generation source carry out point-to-point transaction, establishing a power distribution system operator model; and integrating the building model, the virtual community model, the distributed power generation model and the power distribution system operator model into a framework model of P2P energy transaction to obtain the point-to-point energy transaction method. According to the method, the utilization rate of renewable energy sources is maximized, and dependence on an external power grid is reduced. The energy transaction cost is remarkably reduced, the flexibility and expandability of the system are improved, the stability of the power distribution network is effectively maintained, network overload is prevented, and privacy protection and a reliable transaction mechanism are provided.
Owner:GUANGXI POWER GRID CORP

Distributed voltage control method and device, electronic equipment, readable storage medium and program product

The invention relates to a distributed voltage control method and device, electronic equipment, a readable storage medium and a program product. The method comprises the following steps: establishing a micro-grid communication model based on a graph theory based on a micro-grid comprising a plurality of distributed power generation units, for each node, acquiring inverter output voltage of an adjacent node of the node based on the micro-grid communication model, and calculating the inverter reference voltage of the node and the inverter output voltage of the adjacent node according to the inverter reference voltage of the node and the inverter output voltage of the adjacent node. And the inverter output voltage of the node is adjusted based on a containment consistency control protocol, so that the common bus voltage of the micro-grid reaches a rated value when the system is in a steady state. The distributed micro-grid communication model adopts sparse communication to realize voltage regulation and power distribution, and each node in the system only communicates with the adjacent node, so that the communication cost is reduced. And the voltage consistency among the distributed nodes is realized through the containment consistency control protocol, so that the stability and the reliability of the whole system can be improved.
Owner:MAINTENANCE & TEST CENTRE CSG EHV POWER TRANSMISSION CO

Layered and partitioned distributed power supply and energy storage two-stage planning method considering source storage load

The invention relates to a layered and partitioned distributed power supply and energy storage two-stage planning method considering source storage load, belongs to the technical field of distributed power supply and energy storage capacity planning in a power distribution network, and aims at solving the problem of consumption caused by access of high-proportion renewable energy to the power distribution network and improving the power supply reliability of a power system. The power system operation cost is reduced; the method comprises the following steps: firstly, dividing a voltage regulation area of each distributed power supply on the basis of an electrical distance structural index based on active-reactive voltage sensitivity, secondly, carrying out two-stage planning on the basis of partitioning, constructing a two-stage planning model by taking minimum network loss and optimal economical efficiency as targets, and carrying out solving by adopting a distance-based improved ant lion algorithm; and finally, solving based on an IEEE33 node example, and verifying the effectiveness of the two-stage planning. The method has the advantages that the power complementation characteristic is fully played, the two-stage planning model is constructed, and the power distribution network operates economically, safely and reliably.
Owner:ECONOMIC TECH RES INST OF STATE GRID HENAN ELECTRIC POWER +4

Loop matrix coding-based distributed power supply-containing power distribution network fault recovery global optimization method

The invention relates to a distributed power supply-containing power distribution network fault recovery global optimization method based on ring matrix coding, and the method comprises the steps: constructing a distributed power supply model, and obtaining a distributed power supply-containing power distribution network according to the distributed power supply model; the method comprises the following steps: establishing an ordered annular matrix according to a topological structure of a power distribution network, and performing integer coding on each loop in the ordered annular matrix to obtain an annular matrix code; constructing a power distribution network fault recovery model based on the load recovery rate, the network loss and the utilization rate of the distributed power supply; and generating an initial population according to the ring matrix coding, and performing optimization solution on the power distribution network fault recovery model by adopting an intelligent optimization algorithm to obtain a final fault recovery scheme. According to the method, ring matrix coding and a one-stage fault recovery strategy are combined, all solutions generated by utilizing the ring matrix coding are feasible solutions, and the feasibility of the final solution obtained by carrying out island division on the basis is also ensured.
Owner:HUNAN UNIV OF SCI & TECH

Micro-grid optimal scheduling method, system and equipment considering flexible load

The invention discloses a micro-grid optimal scheduling method, system and device considering flexible loads, and relates to the field of micro-grid optimal scheduling. Establishing a comprehensive objective function and constructing an operation load constraint set by taking micro-grid operation cost minimization and environmental benefit maximization as objectives; based on the operation load constraint set, solving the comprehensive objective function to obtain day-ahead scheduling information and intra-day rolling information; issuing a flexible load regulation and control instruction to the micro-grid through the block chain smart contract, and collecting flexible load real-time operation feedback information; and in combination with a deep reinforcement learning emergency regulation and control strategy and a sensitivity analysis optimization strategy, determining a compensation optimization scheduling scheme according to the flexible load real-time operation feedback information and the flexible load regulation and control instruction. The method can give consideration to both environmental protection and economy, improves the reasonability of load regulation and control, and effectively deals with the uncertainty of the source load.
Owner:GUO WANG ZHE JIANG SHENG DIAN LI YOU XIAN GONG SI HANG ZHOU SHI XIAO SHAN QU GONG DIAN GONG SI +1

Distributed power supply and energy storage reactive power control method considering interval coordination

The invention provides a distributed power supply and energy storage reactive power control method considering interval coordination, and relates to the technical field of energy storage, and the method comprises the steps: dividing a power distribution network into a plurality of power distribution network regions according to the power loss, the power utilization demand mode, the load characteristics, and the power grid adjustment capability; collecting power loss data of branches in each power distribution network region; constructing a target power optimization model according to the power loss data and the power distribution coefficient corresponding to each power distribution network region; performing iterative solution on the target power optimization model by taking the total loss of the minimized current at each intersection as a target and taking branch node voltage constraint, reactive current stability constraint and equipment capacity constraint as constraint conditions to obtain a reactive power control strategy of the distributed power supply and energy storage; and according to the reactive power control strategy, controlling operation equipment in each power distribution network area. According to the scheme, control over the distributed power supply and the energy storage reactive power can be achieved through line monitoring, and then the voltage quality of the transformer area is improved.
Owner:NINGDONG POWER SUPPLY COMPANY OF STATE GRID NINGXIA ELECTRIC POWER

Distributed generation of real-time location

A system and method for determining location information of a portable device relative to an object is provided. In one embodiment, aspects of the system to determine location with respect to the portable device may be distributed among more than one device in the system.
Owner:DENSO INTERNATIONAL AMERICA INC

VSG asymmetric low voltage ride through control method

The invention belongs to the technical field of VSG control, and particularly discloses a VSG asymmetric low voltage ride through control method which comprises an active frequency control link and a reactive voltage control link. Wherein a phase compensation link is added in the active frequency control link, and is used for setting a negative sequence current reference value of a power grid to be 0 when the power grid breaks down, and performing phase compensation on a positive sequence ring of the power grid; primary voltage regulation switching PI control is added in the reactive voltage control link and is used for switching a power grid voltage reference value in the reactive voltage control link into a reactive power reference value Qa during a fault and switching an inverter reactive power reference value into a reactive ring reference voltage Eerror in the active frequency control link during the fault when the power grid breaks down; amplitude compensation is carried out on a reference voltage amplitude output by the reactive loop, and meanwhile, a proportional link in a reactive voltage control link is changed into PI control. According to the invention, the low-voltage ride-through capability of the distributed power generation system can be effectively improved.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)

System and method for protecting multiple distributed power generation resources

A method for providing a multi-layer protection against faults for a power plant is provided. The method includes monitoring, via a system level controller, one or more parameters at a first plurality of distributed power generation resources. The method also includes implementing, via the system level controller, a failsafe mode when the one or more parameters of the first plurality of distributed power generation resources exceed a first threshold. Specifically, the fail-safe mode includes implementing a time delay, and after the time delay, commanding, via the system level controller, a trip of a first feeder circuit breaker on the first feeder line. The method further includes exiting the failsafe mode when the one or more parameters of the first plurality of distributed power generation resources are equal to or fall below a first threshold.
Owner:GE INFRASTRUCTURE TECH LLC

A method for minimizing power loss in a power distribution system based on quantum genetic algorithm to optimize the location and capacity of distributed power sources.

This invention provides a distributed generation (DG) optimization configuration method based on a quantum genetic algorithm, aiming to minimize power loss and improve voltage stability in power distribution systems. The method first collects basic data of the power distribution network, including bus numbers, voltage levels, line impedances, bus load demands, and capacity limitations of distributed generation sources. Next, a population containing different DG configuration schemes is initialized using a random number generation algorithm, and the population is iteratively optimized using a quantum genetic algorithm. During the optimization process, quantum selection, crossover, and mutation operations are used to generate a new generation of configuration schemes, and the power loss and voltage level of each scheme are evaluated using a fitness function to gradually approach the optimal solution. After obtaining the optimal configuration scheme, different load conditions (such as load increases or decreases) are simulated to verify and optimize the adaptability of the configuration, ensuring that the system can maintain low power loss and voltage stability under load fluctuations. The final output optimal DG configuration scheme includes bus location, capacity, and optimized power loss and voltage curves, capable of adapting to dynamic load changes. This method can effectively reduce power loss and improve voltage stability in power distribution systems, providing technical support for building efficient and reliable power distribution systems.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Micro-grid energy management method, system and device and storage medium

The invention relates to the technical field of power system optimization control, and discloses a micro-grid energy management method, system and device and a storage medium, and the method comprises the steps: constructing a first optimization model containing renewable energy, distributed power generation and demand response based on an actual operation scene of a micro-grid; establishing a demand response model based on a first load response mechanism, and applying the demand response model to the first optimization model; introducing a first optimization algorithm, and fusing a greedy search mechanism of a second optimization algorithm on the basis of the first optimization algorithm to obtain a first fusion optimization algorithm; and in combination with the actual operation data, solving a first optimization model of the application demand response model by using a first fusion optimization algorithm to obtain an optimal scheduling scheme of each distributed energy source. According to the method, the price elasticity demand response strategy and the advanced meta-heuristic optimization technology are combined, the future micro-grid management practice is effectively guided, and the development of a more elastic and environment-friendly energy system is facilitated.
Owner:YUNNAN POWER GRID CO LTD

Device and method for preventing countercurrent on direct current side of photovoltaic inverter

The invention provides a photovoltaic inverter DC side anti-reflux device and method, and belongs to the field of distributed power generation. The device is connected in series between a photovoltaic string and an inverter, and comprises a circuit breaking unit, a parallel power adjusting unit, a blocking diode and the like. The control method adopts a hierarchical control strategy of removal and adjustment: a controller collects the countercurrent power of a grid-connected point in real time, and when countercurrent is detected, the countercurrent power is judged; if the countercurrent power exceeds the output power of the single-path photovoltaic string, cutting off is executed, the corresponding number of circuit breaking units are directly controlled to be disconnected, and part of the photovoltaic string is physically cut off; and controlling the residual trace countercurrent power, calculating a PWM duty ratio by using a direct calculation or incremental PID algorithm, and driving a power adjusting unit to carry out hardware chopping consumption or suppression. According to the invention, long-time heating of the power device under large current is avoided, the problem of overlarge power regulation granularity caused by pure cutting is solved, and smooth and rapid countercurrent prevention of the photovoltaic system is realized.
Owner:JIANGSU BAIRUI AUTOMATION TECH

An intelligent micro-grid multi-source collaborative optimization control method

PendingCN122338873ASmart microgridNew energy
This invention discloses a multi-source collaborative optimization control method for smart microgrids, relating to the field of energy technology. The method includes: connecting to the user side to predict the power supply demand of the target microgrid in a preset time zone; acquiring a hybrid energy supply module containing multiple distributed power sources; collecting historical power supply logs of the distributed power sources and generating relevant time sequences; performing energy curtailment rate analysis based on this to generate indicators and decisions; optimizing energy storage units after determining that the indicators meet the standards; and then performing multi-source collaborative power supply control according to preset demand. This method solves the technical problems of existing new energy power generation uncertainties that are difficult to accurately predict, and unreasonable energy storage module configurations that lead to significant energy losses during power generation, storage, and distribution, resulting in low energy utilization efficiency and unstable power supply quality. By optimizing and integrating new energy power generation, energy storage modules, and energy distribution in the microgrid, it achieves the technical effect of reducing energy losses and ensuring efficient and high-quality power supply to the microgrid.
Owner:国网江苏省电力有限公司睢宁县供电分公司 +1

Distribution area micro-grid distributed power supply-energy storage robust collaborative planning method considering load side resource flexibility

The invention discloses an area micro-grid distributed power supply-energy storage robust collaborative planning method considering load side resource flexibility, and belongs to the technical field of power system planning. Comprising the steps that energy storage characteristics of load side electric vehicles and heating ventilation air conditioners are considered, and a cluster electric vehicle generalized energy storage aggregation model and a heating ventilation air conditioner generalized energy storage aggregation model are established; considering the influence of source-load uncertainty, and according to the cluster electric vehicle generalized energy storage aggregation model and the heating ventilation air conditioner generalized energy storage aggregation model, establishing a zone area micro-grid robust collaborative planning model considering the load side resource flexibility; and solving the zone area micro-grid robust collaborative planning model considering the load side resource flexibility by adopting a nested column and a constraint generation algorithm. According to the collaborative planning model established by the method, the flexible adjustment potential of load side resources can be fully mined, the energy storage configuration scale is remarkably reduced, and economic and efficient operation of the micro-grid can be ensured.
Owner:NORTH CHINA ELECTRIC POWER UNIV +1

Voltage Regulator Control in Electric Power Systems with Distributed Generation

The present disclosure relates to control of a voltage regulator in an electric power system. In one embodiment, a system to control a voltage regulator includes a communication interface configured to communicate with the voltage regulator. A power flow direction subsystem may determine a direction of a current flow in the electric power system. A tap change monitoring subsystem may monitor tap changes implemented by the voltage regulator to evaluate a voltage change resulting from each of the plurality of tap changes and determine a source stiffness value for a first source and a second source. A voltage regulator control subsystem is configured to determine a regulation direction based on the direction of current flow determined by the power flow direction subsystem and based on the source stiffness value for the first source and the second source, and communicate the regulation direction to the voltage regulator through the communication interface.
Owner:SCHWEITZER ENGINEERING LABORATORIES INC

A power regulation method suitable for distributed photovoltaic inverters

The present application relates to the technical field of distributed power generation, and discloses a power regulation method suitable for a distributed photovoltaic inverter, which comprises the following steps: S1, combing low-voltage transformer area topology relationship; S2, determining node priority; S3, collecting grid-connected point voltage and active power of each inverter, and determining reference values of node active power, rated power and voltage; S4, judging each node voltage event; S5, executing different processes according to different events; S6, determining actual target active power or actual target active power percentage of each inverter, and issuing to each inverter for power regulation; and S7, jumping to S3. The present application is based on transformer area topology hierarchical information, selects appropriate photovoltaic inverters to perform power regulation in a certain proportion, reduces unnecessary photovoltaic power regulation, and ensures fairness and full utilization of photovoltaic inverters.
Owner:QINGDAO TOPSCOMM COMM +3

Power distribution network power supply and distribution system and method based on energy storage balance

The invention provides a power distribution network power supply and distribution system and method based on energy storage balance. The method comprises the steps that real-time operation parameters of all nodes in an active power distribution network are collected; the real-time operation parameters comprise the real-time power generation power of the distributed power supply, the real-time electrical load power of the user side and the real-time charge state of the energy storage device; performing power supply simulation based on the real-time generated power, the real-time electrical load power and the real-time charge state, and determining an initial power supply scheme; the initial power supply scheme comprises initial power supply power of the distributed power supply and initial charging and discharging power of the energy storage device; after power supply is carried out according to the initial power supply scheme, stability evaluation is carried out based on the current charge state of the energy storage device and the voltage constraint condition and the current constraint condition of each node in the active power distribution network, and a final power supply scheme is determined; the final power supply scheme comprises the final power supply power of the distributed power supply and the final charging and discharging power of the energy storage device. According to the invention, efficient and stable operation of the power distribution network is realized.
Owner:STATE GRID ZHEJIANG ELECTRIC POWER CO LTD HANGZHOU POWER SUPPLY CO

Distribution network distributed clean energy bearing optimization method based on market mechanism

The invention discloses a market mechanism-based power distribution network distributed clean energy bearing optimization method. The method comprises the following steps of 1, constructing a planning decision model of a power distribution network distributed energy system and a small gas turbine; step 2, constructing a power purchase decision optimization model of the power purchase side power distribution network so as to obtain a decision scheme with the minimum total power purchase cost; and step 3, on the basis of the bidding strategy game model of the distributed power generation unit, constructing a market clearing model of the power transaction center, and obtaining an optimal decision scheme under the model. According to the method, the defect that existing power distribution network planning is difficult to consider clean energy bearing capacity, investment uncertainty and cost optimization is overcome, low-cost power purchase and efficient clean energy consumption are realized, the reliability and flexibility of the system are improved, and the bearing capacity and operation economy of the power distribution network are effectively enhanced.
Owner:POWER ECONOMIC RESEARCH INSTITUTE OF JILIN ELECTRIC POWER CO LTD +1

A microgrid distributed cooperative control method and system based on FCS-MPC and improved finite time consensus

The application discloses a micro-grid distributed cooperative control method and system based on FCS-MPC and improved finite-time consensus, relates to the technical field of power system control, and comprises the following steps: configuring a hybrid energy storage system of super capacitors and storage batteries in a photovoltaic power generation unit and a fan power generation unit respectively, and constructing a distributed power generation unit; utilizing FCS-MPC to optimize the switching state of a Boost voltage-boosting circuit, a hybrid energy storage bidirectional DC / DC converter and a two-level inverter, and performing voltage dynamic regulation and fluctuation correction of a direct-current bus; constructing a micro-grid; performing secondary frequency recovery control and active power proportional distribution based on a secondary frequency recovery control strategy of the improved finite-time consensus theory; and performing secondary voltage recovery control and reactive power proportional distribution based on a secondary voltage recovery control strategy of the improved finite-time consensus theory. The application improves the operation stability and power quality of the micro-grid under high renewable energy penetration.
Owner:SOUTHERN POWER GRID DIGITAL GRID RESEARCH INSTITUTE CO LTD

Distribution network flexible interconnection device configuration optimization method and device, terminal and medium

The invention discloses a configuration optimization method and device for a flexible interconnection device of a power distribution network, a terminal and a medium, and the method comprises the steps: firstly obtaining the topological structure information of the power distribution network, collecting the data of the power distribution network, and calculating the load moment parameter of each node; the method comprises the following steps: acquiring a load moment parameter, constructing a load moment correlation model of a correlation relationship between the load moment parameter and a power distribution network operation parameter based on the load moment parameter, then constructing a multi-target optimization model based on load moment parameter weighting based on the load moment correlation model, and solving the model to obtain an SOP configuration optimization scheme. According to the scheme, the load moment parameter is introduced, the load moment correlation model and the load moment parameter weighting-based multi-objective optimization model are constructed, and the spatial distribution characteristics of the load in the power distribution network and the influence of the spatial distribution characteristics on the system operation are fully considered, so that in the active power distribution network containing the high-proportion distributed power supply, the power distribution efficiency is improved. The optimization result can be prevented from falling into local optimum, so that the configuration of the flexible interconnection device of the power distribution network can be optimized more accurately.
Owner:ZHUHAI POWER SUPPLY BUREAU GUANGDONG POWER GIRD CO

A direct current micro-grid optimal power flow model based on GNN assisted convex relaxation verification, a system thereof and a memory

The application discloses a kind of based on GNN auxiliary convex relaxation verification direct current microgrid optimal power flow model and its system and memory.The model includes: based on MPPT-DGs and droop control establishes the non-convex power flow optimization model of distributed power generation unit and constant power load, it is accurately convex relaxation using SOCP structure, then microgrid is abstracted into graph model, extract the structure and electrical characteristics of node and edge as GNN input, and set SOCP structure relaxation, collectively input to AI-Verifier module, then based on KKT condition and construct consistency synchronization item, form distributed coordination, then introduce physical guided GCNs architecture, quickly converge to global optimal solution, and verify model performance by experiment.Based on the system provided with computer program above, it can effectively solve the problems of communication data packet loss, frequent failure and low reliability faced by centralized optimization method in large-scale direct current microgrid in the prior art, and realize intelligent optimization control of direct current microgrid.
Owner:CENT SOUTH UNIV

Photovoltaic grid-connected box control method and system suitable for active harmonic suppression

The invention relates to the technical field of photovoltaic grid-connected control, and discloses a photovoltaic grid-connected box control method and system suitable for active harmonic suppression, and the system comprises a photovoltaic assembly module, a grid-connected inverter and a composite repetitive control module. According to the system, solar energy is converted into direct current through a photovoltaic assembly module, then the direct current is converted into alternating current through a grid-connected inverter to be connected into a power grid, a composite repetitive control module is used for detecting grid-connected current harmonics, generating a total harmonic distortion rate and judging whether a photovoltaic grid-connected box meets grid-connected conditions or not, and if the total harmonic distortion rate is smaller than or equal to 5%, the grid-connected conditions are met; and if the total harmonic distortion rate is greater than 5%, a harmonic suppression measure should be taken in time, so that compared with a traditional control system, the photovoltaic grid-connected box has better harmonic suppression capability, realizes active suppression of the photovoltaic grid-connected box on harmonic current caused by power grid background harmonic waves and nonlinear loads, and has great significance in guaranteeing the electric energy quality in the photovoltaic grid-connected process. And the method has a positive effect on promoting distributed power generation friendly grid connection and the like.
Owner:INST OF COMM SCI YUNNAN PROV

A county power grid comprehensive regulation system and method considering distributed power consumption and energy storage benefits

The application discloses a county power grid comprehensive regulation system and method considering distributed power consumption and energy storage benefits, and relates to the technical field of power grid regulation. The system comprises a data collection unit, a control unit and an execution unit. The data collection unit is used for collecting power grid operation data, photovoltaic power generation, wind power generation and energy storage state in real time. The control unit is used for making decisions on energy storage operation strategy, distributed power generation operation strategy and county power grid branch line connection switch connection strategy according to the collected data. The execution unit is used for executing the decisions of the control unit and regulating power grid operation. Through real-time data collection, intelligent control decision and automatic execution, the energy storage operation strategy, the distributed power generation operation strategy and the county power grid branch line connection switch connection strategy are optimized, and the maximization of power grid economic benefits and the optimization of distributed power consumption are realized.
Owner:STATE GRID JIANGSU ELECTRIC POWER CO LTD TAIZHOU POWER SUPPLY BRANCH

Probabilistic Planning Method and Device of Distributed Generation for Reconfiguration Oriented to Bearing Capacity and Network Loss

The present invention discloses a probabilistic planning method and device for distributed power sources oriented to bearing capacity and network loss reconstruction. By solving a two-layer planning model, a distributed power source access scheme and a network reconstruction scheme are determined. The planning layer of the two-layer planning model operates a distributed power source planning model with the maximum access capacity of distributed power sources and the minimum network loss as the objectives, and the operation layer operates a network reconstruction optimization model with the minimum network loss as the objective. The method includes: solving the distributed power source planning model to obtain a distributed power source access scheme; solving the network reconstruction optimization model to obtain a network reconstruction scheme; taking the access location and capacity of the distributed power sources obtained by the planning layer as the input of the operation layer, and taking the network reconstruction scheme and network loss obtained by the operation layer as the input of the planning layer, and performing two-layer optimization iteration until an optimal distributed power source access scheme and an optimal network reconstruction scheme are obtained. The present invention effectively reduces network loss while improving the utilization rate of distributed power sources.
Owner:THE ACAD OF TIANJIN UNIV HEFEI +1

Short play work batch generation method and device, and electronic equipment

This invention provides a method, apparatus, and electronic device for batch generation of short drama works, belonging to the field of film and television work generation technology. The method includes: a master node acquiring the script of the short drama to be generated; decomposing the script into multiple atomic tasks and determining the dependencies between these tasks; based on the dependencies, distributing atomic tasks without dependencies to multiple slave nodes in a distributed generation system in parallel via a message queue; each slave node executing the received atomic tasks in parallel, writing the intermediate data generated as execution results into a distributed storage system; and the master node reading the execution results of each atomic task from the distributed storage system, merging them according to the dependencies and the time sequence of the script to generate the short drama video. This invention enables high-concurrency batch production of short dramas, significantly improving the efficiency and stability of short drama generation.
Owner:WUHAN MAIYI INFORMATION TECH CO LTD