CN-122022215-A - Energy storage unit optimal configuration analysis device and method, computer equipment and readable storage medium

CN122022215ACN 122022215 ACN122022215 ACN 122022215ACN-122022215-A

Abstract

The invention discloses a network-structured/network-following type energy storage unit optimal configuration analysis device which comprises a network distribution information acquisition module, a network distribution data analysis module, an energy storage unit optimal configuration calculation module and a user interaction interface, wherein the energy storage unit in a power distribution network is optimally configured based on the key load power supply guarantee requirement, so that the guarantee capability of the power distribution network on key load power supply is enhanced, the running stability and economy of the power distribution network are improved, and meanwhile, the effective consumption of new energy and the safe and stable running of the power distribution network are ensured. The invention also discloses an analysis method of the network-structured/network-following type energy storage unit optimal configuration analysis device. The invention also discloses computer equipment and a computer readable storage medium for the optimization configuration analysis of the net-structured/net-structured energy storage unit, and the analysis method of the optimization configuration analysis device of the net-structured/net-structured energy storage unit can be realized.

Inventors

DENG MENGHUA
LU YU
LIU YIHUA
LU CHAO
HONG YU
SUN ZHIHENG

Assignees

国网上海市电力公司

Dates

Publication Date: 20260512
Application Date: 20241105

Claims (10)

1. The utility model provides a net type/with net type energy storage unit optimal configuration analytical equipment which characterized in that includes: the distribution network information acquisition module is used for importing distribution network grid structure information, key load basic information, distributed power supply output information and basic technical parameters of the energy storage unit; The distribution network data analysis module is used for carrying out load flow calculation analysis on distribution network operation data and evaluating the operation state of the distribution network, the basic operation state of key load and potential configuration places of the energy storage unit; the energy storage unit optimizing configuration calculation module is used for calculating and analyzing the configuration of the energy storage unit by utilizing an optimizing algorithm to determine an optimal net-structured/net-following type energy storage unit optimizing configuration scheme; The user interaction interface is used for inputting data by a user, wherein the data comprises the customized power supply guarantee requirement of a key load and the customized configuration requirement of the energy storage unit, the network-structured/network-following energy storage unit configuration optimization configuration scheme and the network distribution data statistical result are presented on the user interaction interface, and decision suggestions are provided.
2. The method for optimizing configuration analysis of the net-structured/net-structured energy storage unit is characterized by adopting the device as claimed in claim 1 to perform optimizing configuration analysis of the net-structured/net-structured energy storage unit, and specifically comprises the following steps: the method comprises the steps that S1, distribution network information acquisition modules acquire distribution network grid structure data, transformer station information, key load conventional power supply requirements, geographic positions, energy storage unit information and distributed power supply information; S2, setting customized power supply guarantee requirements of key loads and customized configuration requirements of energy storage units by a user through the user interaction interface according to the power distribution network requirements and operation conditions; S3, the distribution network data analysis module carries out load flow calculation analysis on the distribution network according to distribution network grid structure data and distribution conditions of distributed power sources, and evaluates the running state of the distribution network under the current configuration, wherein the running state comprises voltage stability, line load conditions and power flow; S4, the energy storage unit optimal configuration calculation module screens nodes of the configurable energy storage units in the distribution network on the geographical position diagram of the distribution network based on the power supply guarantee requirements for the key loads according to the distribution network power flow calculation result, optimizes specific parameters of the configured energy storage units, and finally evaluates the power supply condition of the key loads in a quantified mode; And S5, displaying the operation result of the distribution network, the configuration place of the energy storage unit, the configuration specific parameter of the energy storage unit and the evaluation result of the key load power supply condition on a user interaction interface based on all the calculation results in the steps S2 and S3.
3. The method for optimizing configuration of network-structured/network-following type energy storage units according to claim 2, wherein in step S1, the network-structured data of the distribution network relates to a physical connection mode of the distribution network, including a line type, a line length and a line capacity, node numbers of a topology map are obtained based on node numbers in the distribution network, and a geographical topology map of the distribution network is obtained according to the connection mode of each node unit in the distribution network; the transformer station information relates to the geographical position, capacity and connection line information of the transformer station; The conventional power supply requirements and the geographical positions of the key loads comprise that the power supply voltage of the key loads is required to be not higher than +/-2% or +/-5% of the rated voltage value, the frequency deviation of the key loads is not more than +/-0.2 Hz, the specific geographical positions of the key loads in the distribution network and the corresponding distribution network node numbers; The energy storage unit information comprises technical parameters of charge and discharge characteristics of the energy storage unit, wherein the types and the allocation sites of the energy storage unit are limited in urban or suburban areas, and the types of the energy storage unit comprise lithium ion batteries, flow batteries and pumped storage stations; The distributed power supply information relates to type, capacity and output characteristic information of a distributed power supply, and comprises wind power generation type, photovoltaic power generation type, installed capacity of the power supply, geographic position of the power supply and corresponding distribution network node numbers.
4. The method for optimizing configuration of a grid-structured/grid-connected energy storage unit according to claim 2, wherein in step S2, the customized power supply guarantee requirement of the critical load includes determining priority of the critical load, power supply quality parameter, guarantee market and power supply reliability requirement, and the customized configuration requirement of the energy storage unit includes capacity, position and technology type of the energy storage unit.
5. The method for optimizing configuration of network-structured/network-following type energy storage units according to claim 4, wherein in step S2, the key load is divided into a primary load and a secondary load, the primary load comprises government organization units and large hospital electricity units, the secondary load comprises a convention center and an automobile passenger station electricity unit, the power supply quality parameters comprise voltage and frequency levels of the key load under normal working conditions, positive and negative deviations of the voltage and the frequency, voltage fluctuation is not more than +/-5% of rated voltage, and frequency fluctuation is not more than +/-0.2 Hz.
6. The method for optimizing configuration of a grid-constructed/grid-following energy storage unit according to claim 2, wherein in step S3, a power flow calculation equation is represented by formula (1), and is written into a computer program for calculating a power flow of a distribution network; In the formula (1), P i 、Q i is the injected active power and the injected reactive power of the node i, and V i 、θ i is the voltage and the phase angle of the node i.
7. The method for optimizing configuration analysis of a grid-structured/grid-following energy storage unit according to claim 2, wherein in step S4, the grid-structured energy storage unit controls the voltage and frequency of the power grid through virtual synchronous machine control, and the motion equation of the simulated generator rotor is as shown in formula (2): In formula (2), δ represents the phase angle of the energy storage unit, ω represents the frequency of grid operation, ω 0 represents the rated frequency of grid operation, T J represents the inertia coefficient of the simulated generator, P T represents the mechanical power of the simulated generator, P E represents the electromagnetic power of the simulated generator, and D represents the damping coefficient of the simulated generator.
8. The method for optimizing configuration of network-structured/network-following type energy storage units according to claim 7, wherein in step S4, time domain simulation is performed on different configuration nodes, voltage fluctuation and frequency fluctuation in a period of time in the future are obtained by adding fluctuation to a certain key load, power supply conditions of all the key loads in the distribution network are evaluated, including voltage fluctuation quantity, frequency fluctuation quantity and recovery time index of the key loads, iterative processing is performed on the inertia coefficient, damping coefficient, capacity of the energy storage unit and proportion of power capacity of the analog generator, and the most suitable operation mode and operation parameters are selected.
9. A computer device for optimizing configuration analysis of a grid-formation/grid-following type energy storage unit, characterized by comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the method for optimizing configuration analysis of a grid-formation/grid-following type energy storage unit according to any one of claims 2 to 8 when executing the computer program.
10. A computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the grid-formation/grid-following energy storage unit optimization configuration analysis method according to any one of claims 2 to 8.

Description

Energy storage unit optimal configuration analysis device and method, computer equipment and readable storage medium Technical Field The invention relates to a device and a method for analyzing the optimal configuration of a net-structured/net-structured energy storage unit, and relates to computer equipment and a computer readable storage medium for analyzing the optimal configuration of the net-structured/net-structured energy storage unit. Background With the rapid development of new energy, particularly large-scale distributed grid connection of wind energy and solar energy, new requirements are put forward on the regulation capability of a power grid. The energy storage technology is taken as an important means for improving the consumption of new energy, and the mode of combining energy storage with a distributed power supply becomes the mainstream trend. The configuration of energy storage is reasonably optimized in the power distribution network, so that energy waste can be relieved, impact of new energy grid connection on power grid dispatching operation can be reduced, and power supply guarantee requirements of the power distribution network on key loads can be improved. The existing energy storage units are mainly controlled by a grid, and in this mode, the energy storage units are essentially current sources, and the working state of the energy storage units depends on the voltage and the frequency of a power grid. The following net type energy storage unit can normally operate under the condition of better power grid stability, but cannot provide voltage and frequency support, and can normally operate only by depending on stable voltage and frequency provided by a power grid. The grid-formed control is used for outputting stable voltage and frequency with the advantage of autonomously setting voltage parameters, so that the voltage and frequency supporting capability of the converter is improved, and the stability of the power system is enhanced. The grid-formed energy storage unit can construct the amplitude and the phase of the voltage at the alternating current side by itself under the condition of not depending on an external alternating current system, and provides strong voltage support for the power system. The net-structured energy storage unit has stronger regulation capability on the power distribution network, and can provide power supply guarantee for key loads compared with the net-structured energy storage unit. Based on the geographic positions of different distributed power supplies in the power distribution network, the grid-structured energy storage unit can provide more flexible voltage and frequency support, and stability and reliability of the power grid are enhanced. According to the customized power supply requirement of key loads in the distribution network, the grid-structured energy storage unit can perform accurate energy management and optimal scheduling so as to adapt to different load characteristics and power grid running states, which is important for improving the regulating capacity and the power supply guarantee capacity of the power distribution network, and simultaneously brings great technical challenges. Disclosure of Invention The invention aims to overcome the defects of the prior art, and provides a network-structured/network-following type energy storage unit optimal configuration analysis device, which is based on the critical load power supply guarantee requirement, and by optimally configuring the energy storage units in a power distribution network, the guarantee capability of the power distribution network to the critical load power supply is enhanced, the running stability and economy of the power distribution network are improved, and meanwhile, the effective consumption of new energy and the safe and stable running of the power distribution network are ensured. Another object of the present invention is to provide a method for optimizing configuration and analysis of a grid-structured/grid-following energy storage unit. A third object of the present invention is to provide a computer device for performing a grid-formation/grid-following energy storage unit optimization configuration analysis. A fourth object of the present invention is to provide a computer readable storage medium for performing a grid-formation/grid-following energy storage unit optimization configuration analysis. The technical scheme for achieving the purpose is that the network-structured/network-following type energy storage unit optimizing configuration analysis device comprises: the distribution network information acquisition module is used for importing distribution network grid structure information, key load basic information, distributed power supply output information and basic technical parameters of the energy storage unit; The distribution network data analysis module is used for carrying out load flow calculation analysis on distribution network operation data