Energy storage configuration method and system based on wind, light and hydrogen storage multi-energy micro-grid topology

Abstract

The invention belongs to the technical field of energy storage configuration, and provides an energy storage configuration method and system based on wind, light and hydrogen storage multi-energy micro-grid topology, buses are divided into a direct-current medium-voltage bus, a direct-current low-voltage bus, an alternating-current medium-voltage bus and an alternating-current low-voltage bus, and a power grid is only connected with the alternating-current medium-voltage bus and the alternating-current low-voltage bus. The buses are connected with each other through the converters and the transformers; through the connection optimization design of the bus, the overall installation and operation cost of the system is obviously reduced. The installation investment cost and the operation maintenance cost of the wind, light and hydrogen storage multi-energy micro-grid topology system are considered; the method comprises the following steps of: establishing a configuration mathematical model by taking minimization of a net present value of investment cost required by a wind-light-hydrogen storage multi-energy micro-grid topological system in the whole life cycle as an optimization target and taking wind power generation and photovoltaic power generation capacities on each bus and power distribution in an operation process as constraint conditions; the characteristics of wind-solar power generation and the structural rationality of the wind-solar hydrogen storage micro-grid are fully considered, and the stability and scheduling economy of the micro-grid are ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy storage configuration, and in particular, relates to an energy storage configuration method and system based on a wind, solar, hydrogen and storage multi-energy microgrid topology. Background Art

[0002] The wind-solar-hydrogen-storage multi-energy microgrid composed of a wind power generation system, a photovoltaic power generation system and a hydrogen energy storage system can effectively reduce the negative impact of wind power and photovoltaics on the power grid, and can broaden the application scenarios of renewable energy and provide stable energy support for different types of power load demands.

[0003] The inventors found that the existing multi-energy microgrids have certain limitations in energy storage configuration. Specifically, most of the existing microgrid energy storage configuration methods only consider a single energy storage technology and a single energy form as the configuration subject, ignoring the complementary characteristics between different energy storage technologies and different energy forms; some methods only consider the short-term economic benefits of the microgrid system, lack of long-term operation and maintenance costs and accurate modeling of differences in the life of energy storage equipment, resulting in inefficient use of microgrid energy. In addition, the existing methods lack the joint coordinated planning of microgrid topology architecture and energy storage configuration, making it difficult to use its topology-capacity-operation characteristics multi-coupling characteristics to improve the planning economic benefits. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a method and system for energy storage configuration based on a wind, solar, hydrogen and storage multi-energy microgrid topology. The present invention establishes a mathematical model for the joint configuration of a hybrid multi-energy microgrid topology and energy storage capacity, fully considering the characteristics of wind and solar power generation and the structural rationality of the wind, solar, hydrogen and storage microgrid, ensuring the stability and scheduling economy of the microgrid; at the same time, through the optimized design of the busbar connection, the overall installation and operation costs of the system are significantly reduced.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0006] In a first aspect, the present invention provides an energy storage configuration method based on a wind, solar, hydrogen and storage multi-energy microgrid topology, comprising:

[0007] Establish a wind, solar, hydrogen and storage multi-energy microgrid topology system; in which, the busbars are divided into DC medium-voltage busbars, DC low-voltage busbars, AC medium-voltage busbars and AC low-voltage busbars, and the power grid is only connected to the AC medium-voltage busbars and AC low-voltage busbars. The buses are interconnected through converters and transformers;

[0008] Considering the installation investment cost and operation and maintenance cost of the wind-solar-hydrogen-storage multi-energy microgrid topology system, the optimization goal is to minimize the net present value of the investment cost of the wind-solar-hydrogen-storage multi-energy microgrid topology system throughout its life cycle. The wind power generation and photovoltaic power generation capacity on each bus and the power distribution during operation are used as constraints to establish a configuration mathematical model.

[0009] Energy storage configuration is carried out using the established configuration mathematical model.

[0010] Furthermore, a power grid, a photovoltaic power generation system, a wind power generation system and an electric boiler are arranged on one side of the busbar, and an electric load, a hydrogen energy storage system and a battery are arranged on the other side; the hydrogen energy storage system includes an electrolyzer, a hydrogen storage tank and a fuel cell; the hydrogen energy storage system and the electric boiler are connected to a thermal load.

[0011] Furthermore, the objective function is:

[0012]

[0013] Among them, C buy,q and C opt,q W is the unit installation cost and operation and maintenance cost during the operation of the equipment; q is the design capacity of equipment q; P opt,q,t is the operating power of device q at time t; and C buyheat,t The price of electricity purchased from the grid and the price of heat purchased from the heat grid; and P buyheat,t is the energy purchase amount of the power grid and heat network; i is the discount rate; l is the system life.

[0014] Furthermore, at any time t, the input and output power on each bus are equal:

[0015]

[0016] Among them, P buy to i,t P is the amount of electricity purchased by bus i from the power grid at time t; WT to i,t , P PV to i,t are the power supplied to bus i by wind power and photovoltaic power at time t; η H to grid and η grid to H represent the fuel cell discharge efficiency and electrolyzer efficiency respectively; P is the power supply from bus i to the electrolyzer and the power supply from the fuel cell to bus i at time t; need i,t , P need heat,t is the electrical load and thermal load demand of bus i at time t; P i to heat,t P is the power supply energy for the electric boiler on bus i; heatsource,t Supply power to the heat source.

[0017] Furthermore, the mathematical model of the hydrogen energy storage system and the battery is:

[0018]

[0019]

[0020] in, is the hydrogen energy stored at time t; The battery stores electrical energy at time t; is a binary variable used to determine the charging and discharging status of the hydrogen energy storage system; is a binary variable used to judge the battery charge and discharge; δt is the time interval; is the minimum and maximum SOC of the hydrogen energy storage system; is the minimum and maximum SOC of the battery; The minimum and maximum charge capacity for the hydrogen energy storage system; is the minimum and maximum discharge capacity of the hydrogen energy storage system; The minimum and maximum charge capacity of the battery; is the minimum and maximum discharge capacity of the battery.

[0021] Furthermore, in the wind-solar-hydrogen-storage multi-energy microgrid topology system, the wind power generation system and the photovoltaic power generation system are connected to different busbars for operation during the process of supplying energy to the busbar, and the energy transmission direction of each node is restricted; the hydrogen energy storage system and the battery in the wind-solar-hydrogen-storage multi-energy microgrid topology system are constrained on the daily initial and final states and operating states, and the energy stored in the hydrogen energy storage system at the initial time of each day is limited to half of the design capacity, which is used for nighttime energy supply and waste heat heating, and the climbing rate of the hydrogen energy storage system is limited.

[0022] In a second aspect, the present invention also provides an energy storage configuration system based on a wind, solar, hydrogen and storage multi-energy microgrid topology, comprising:

[0023] The wind-solar-hydrogen-storage multi-energy microgrid topology system establishment module is configured to: establish a wind-solar-hydrogen-storage multi-energy microgrid topology system; wherein, in the wind-solar-hydrogen-storage multi-energy microgrid topology system, the busbars are divided into DC medium-voltage busbars, DC low-voltage busbars, AC medium-voltage busbars and AC low-voltage busbars, the power grid is only connected to the AC medium-voltage busbars and the AC low-voltage busbars, and the buses are interconnected through converters and transformers;

[0024] The configuration mathematical model establishment module is configured as follows: considering the installation investment cost and operation and maintenance cost of the wind-solar-hydrogen-storage multi-energy microgrid topology system, taking the minimization of the net present value of the investment cost required for the wind-solar-hydrogen-storage multi-energy microgrid topology system in the entire life cycle as the optimization goal, taking the wind power generation and photovoltaic power generation capacity on each bus and the power distribution during operation as constraints, and establishing a configuration mathematical model;

[0025] The energy storage configuration module is configured to: perform energy storage configuration using an established configuration mathematical model.

[0026] In a third aspect, the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the energy storage configuration method based on a wind, solar, hydrogen and storage multi-energy microgrid topology as described in the first aspect.

[0027] In a fourth aspect, the present invention further provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and capable of running on the processor, wherein when the processor executes the program, the steps of the energy storage configuration method based on the wind, solar, hydrogen and storage multi-energy microgrid topology described in the first aspect are implemented.

[0028] In a fifth aspect, the present invention further provides a computer program product, which includes a computer program. When the computer program is executed by a processor, it implements the steps of the energy storage configuration method based on the wind, solar, hydrogen and storage multi-energy microgrid topology described in the first aspect.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] In the wind, solar, hydrogen and storage multi-energy microgrid topology system established by the present invention, the busbars are divided into a DC medium-voltage busbar, a DC low-voltage busbar, an AC medium-voltage busbar and an AC low-voltage busbar, and the power grid is only connected to the AC medium-voltage busbar and the AC low-voltage busbar. The busbars are interconnected through converters and transformers. By optimizing the connection design of the busbars, the overall installation and operation costs of the system are significantly reduced. At the same time, the installation investment cost and operation and maintenance cost of the wind, solar, hydrogen and storage multi-energy microgrid topology system are considered. Taking the minimization of the net present value of the investment cost required for the wind, solar, hydrogen and storage multi-energy microgrid topology system throughout its life cycle as the optimization goal, and taking the wind power generation and photovoltaic power generation capacity on each busbar and the power distribution during operation as constraints, a configuration mathematical model is established. The established configuration mathematical model is a joint configuration mathematical model of the hybrid multi-energy microgrid topology and energy storage capacity, which fully considers the characteristics of wind and solar power generation and the structural rationality of the wind, solar, hydrogen and storage microgrid, and ensures the stability and dispatching economy of the microgrid. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings in the specification that constitute a part of this embodiment are used to provide a further understanding of this embodiment. The schematic embodiments of this embodiment and their descriptions are used to explain this embodiment and do not constitute improper limitations on this embodiment.

[0032] Figure 1 This is a schematic diagram of the topological structure of a wind-solar-hydrogen-storage multi-energy microgrid according to Embodiment 1 of the present invention;

[0033] Figure 2 This is a flow chart of the configuration method of embodiment 1 of the present invention. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0035] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0036] MVDC—DC medium voltage bus; LVDC—DC low voltage bus; MVAC—AC medium voltage bus; LVAC—AC low voltage bus.

[0037] Embodiment 1:

[0038] At present, the development and application of renewable energy is the main means to reduce global carbon emissions, among which wind energy and solar energy are the main renewable energy sources. However, during the process of wind power and photovoltaic power generation being connected to the grid, their volatility and randomness will affect the stability and dispatch economy of the power grid. Therefore, renewable energy systems such as wind and solar power need to be equipped with energy storage devices to reduce the negative impact of their uncertainty and volatility characteristics, thereby further improving the utilization efficiency of renewable energy.

[0039] At present, hydrogen energy storage system, as an emerging energy storage method, can effectively improve the utilization rate of renewable energy, reduce energy loss, and improve the overall energy utilization rate by virtue of its advantages of long-term and seasonal energy storage and its ability to meet different voltage requirements in various fields. In addition, its energy storage capacity is cheap and can be built on a large scale, so it can effectively reduce the construction cost of large-capacity energy storage. In addition, while the hydrogen energy storage system supplies power to the load through fuel cells, the waste heat generated by the fuel cells can be used to meet the user's thermal load, further improving the overall energy utilization efficiency of the system. Therefore, the wind, solar, hydrogen and storage multi-energy microgrid composed of wind power generation system, photovoltaic power generation system and hydrogen energy storage system can effectively reduce the negative impact of wind power and photovoltaic on the power grid, broaden the application scenarios of renewable energy, and provide stable energy support for different types of electrical load demands.

[0040] However, the existing energy storage configuration of multi-energy microgrid systems has certain limitations. First, most of the existing microgrid energy storage configuration methods only consider a single energy storage technology and a single energy form as the configuration subjects, ignoring the complementary characteristics between different energy storage technologies and different energy forms; second, some methods only consider the short-term economic benefits of the microgrid system, lack of long-term operation and maintenance costs and accurate modeling of differences in the life of energy storage equipment, resulting in inefficient use of microgrid energy. In addition, the existing methods lack the joint coordinated planning of microgrid topology architecture and energy storage configuration, and it is difficult to use its topology-capacity-operation characteristics multi-coupling characteristics to improve the planning economic benefits.

[0041] In view of the defects of the current methods, this embodiment provides an energy storage configuration method based on a wind-solar-hydrogen-storage multi-energy microgrid topology, which realizes comprehensive optimization of the multi-energy microgrid system and can ensure the efficient, stable and economical operation of the multi-energy microgrid. The method includes:

[0042] S1. Establish a wind, solar, hydrogen and storage multi-energy microgrid topology system; in which, in the wind, solar, hydrogen and storage multi-energy microgrid topology system, the busbars are divided into DC medium-voltage busbars, DC low-voltage busbars, AC medium-voltage busbars and AC low-voltage busbars, and the power grid is only connected to the AC medium-voltage busbars and the AC low-voltage busbars, and the busbars are connected to each other through converters and transformers;

[0043] S2. Considering the installation investment cost and operation and maintenance cost of the wind-solar-hydrogen-storage multi-energy microgrid topology system, the optimization goal is to minimize the net present value of the investment cost of the wind-solar-hydrogen-storage multi-energy microgrid topology system throughout its life cycle, and the wind power generation and photovoltaic power generation capacity on each bus as well as the power distribution during operation as constraints, a configuration mathematical model is established;

[0044] S3. Use the established configuration mathematical model to perform energy storage configuration.

[0045] The method in this embodiment aims to solve the technical problem of hydrogen energy storage and electrochemical energy storage configuration in a multi-energy complementary AC / DC hybrid microgrid system. In order to minimize the long-term operating cost of the system and improve the investment planning benefits, a joint topology and energy storage configuration optimization method involving a wind, solar, hydrogen and storage multi-energy microgrid is proposed. The specific steps may include:

[0046] In step S1, a wind-solar-hydrogen-storage multi-energy microgrid topology model is established:

[0047] A typical wind, solar, hydrogen and storage integrated energy system mainly includes wind power generation systems, photovoltaic power generation systems, hydrogen energy storage systems, batteries and other auxiliary equipment; the wind, solar, hydrogen and storage multi-energy microgrid is generally composed of an "electricity-gas-electricity" energy closed loop. In addition, it is necessary to increase the energy flow direction of waste heat utilization during the discharge process of the hydrogen energy storage system.

[0048] As attached Figure 1 As shown, it is the optional wind, solar, hydrogen storage multi-energy microgrid topology in this embodiment. On one side of the busbar, there are power grids, photovoltaic power generation systems, wind power generation systems, electric boilers, etc., and on the other side, there are electric loads, hydrogen energy storage systems, batteries, etc.; the hydrogen energy storage system includes electrolyzers, hydrogen storage tanks, fuel cells, etc.; the hydrogen energy storage system is connected to the electric boiler with a thermal load. Among them, the busbar load is classified according to voltage and transmission mode, including four forms: DC medium-voltage busbar, DC low-voltage busbar, AC medium-voltage busbar and AC low-voltage busbar. Among them, the power grid is only connected to the AC medium-voltage busbar and the AC low-voltage busbar. Each busbar will supply energy for different types of electricity needs of users, and the four types of busbar loads are connected to each other by converters and transformers.

[0049] In step S2, a mathematical model of optimal topology-energy storage capacity configuration of a multi-energy microgrid is established:

[0050] Taking into account the installation investment cost and operation and maintenance cost of the wind, solar, hydrogen and storage integrated energy system, the optimization goal is to minimize the net present value (NPV) of the investment cost required for the system throughout its life cycle. Among them, the construction cost of the wind power generation system, the construction cost of the photovoltaic power generation system, the construction cost of the hydrogen energy storage system, the construction cost of the battery, and the construction cost of the inverter and transformer required between each busbar together constitute the construction cost of the wind, solar, hydrogen and storage multi-energy microgrid; the operating cost includes the annual operation and maintenance cost of the wind power generation system, the photovoltaic power generation system, and the energy storage system composed of hydrogen energy storage and batteries, the cost of purchasing electricity from the power grid, and the cost of purchasing heat from the heating source. The objective function is as follows:

[0051]

[0052] Among them, C buy,q and C opt,q W is the unit installation cost and operation and maintenance cost during the operation of the equipment;q is the design capacity of equipment q; P opt,q,t is the operating power of device q at time t; and C buyheat,t The price of electricity purchased from the grid and the price of heat purchased from the heat grid; and P buyheat,t is the energy purchase amount of the power grid and heat network; i is the discount rate; l is the system life.

[0053] Considering the electric and thermal power balance equation, it is necessary to satisfy the equal input and output power of each bus of the system at any time t. The expression is as follows:

[0054]

[0055] Among them, P buy to i,t P is the amount of electricity purchased by bus i from the power grid at time t; WT to i,t , P PV to i,t are the power supplied to bus i by wind power and photovoltaic power at time t; η H to grid and η grid to H represent the fuel cell discharge efficiency and electrolyzer efficiency respectively; P is the power supply from bus i to the electrolyzer and the power supply from the fuel cell to bus i at time t; need i,t , P need heat,t is the electrical load and thermal load demand of bus i at time t; P i to heat,t P is the power supply energy for the electric boiler on bus i; heatsource,t Supply power to the heat source.

[0056] Constrain the wind power generation and photovoltaic power generation capacity on each bus as well as the power distribution during operation:

[0057] 0≤P PV to i,t ≤E PV,i

[0058] 0≤P WT to i,t ≤E WT,i

[0059]

[0060] Among them, E PV,i , E WT,i Design capacity for wind power generation system and photovoltaic power generation system; WT,t With P PV,t is the total power generation of wind power and photovoltaic power at time t.

[0061] The hydrogen energy storage system in this embodiment mainly includes an electrolytic cell for electrolysis and hydrogen production, a hydrogen storage tank for storing hydrogen produced by the electrolytic cell, and a fuel cell for discharging and supplying heat load with waste heat. The mathematical model of the hydrogen energy storage system and the battery is:

[0062]

[0063]

[0064] in, is the hydrogen energy stored at time t; The battery stores electrical energy at time t; is a binary variable used to determine the charging and discharging status of the hydrogen energy storage system; is a binary variable used to judge the battery charge and discharge; δt is the time interval; is the minimum and maximum SOC of the hydrogen energy storage system; is the minimum and maximum SOC of the battery; The minimum and maximum charge capacity for the hydrogen energy storage system; is the minimum and maximum discharge capacity of the hydrogen energy storage system; The minimum and maximum charge capacity of the battery; is the minimum and maximum discharge capacity of the battery.

[0065] According to the topological structure design of the wind-solar-hydrogen-storage multi-energy microgrid, the wind power generation system and the photovoltaic power generation system are connected to different buses when supplying energy to the bus. Therefore, during the operation of the system, it is necessary to limit the energy transmission direction of each node to avoid incorrect energy flow:

[0066]

[0067]

[0068] P i to heat,t ≥0

[0069] in, Design capacity for grid converters and transformers; Design capacity for heating networks.

[0070] Finally, for the hydrogen energy storage system, the battery's daily starting and ending states and operating states are constrained, limiting the hydrogen energy storage system's stored energy to half of its design capacity at the beginning of each day, which is used for nighttime energy supply and waste heat heating. At the same time, the hydrogen energy storage system's ramp rate is limited to avoid frequent system fluctuations:

[0071]

[0072] Among them, η ramp rate H is the maximum climbing power of the hydrogen energy storage system.

[0073] In step S3, the calculation process is:

[0074] like Figure 2 As shown, it is the calculation process in this embodiment, wherein the input parameters include the typical daily scenario wind power generation data, photovoltaic power generation data, industrial and commercial electricity prices, heating charge standards, load demand curves, and relevant parameters of power supply, heating network and equipment of the target microgrid park. This embodiment proposes an optimization model, the lower layer problem is the optimal operation plan for the typical daily scenario, and the upper layer problem is the optimal topology and energy storage system capacity configuration plan. The solution algorithm can be implemented using a conventional algorithm, and there is no requirement for the solution algorithm, and a variety of algorithms can be used to solve this model. However, no matter what method is used to solve, it belongs to the protection scope of the present invention.

[0075] This embodiment establishes a mathematical model of wind-solar-hydrogen-storage hybrid multi-energy microgrid topology-energy storage capacity joint configuration. The model fully considers the characteristics of wind-solar power generation and the structural rationality of the wind-solar-hydrogen-storage microgrid, ensuring the stability and dispatch economy of the microgrid. Through the connection design of the MVDC bus, MVAC bus, LVDC bus, and LVAC bus, a significant reduction in the overall installation and operation costs is achieved. At the same time, the waste heat utilization of hydrogen energy storage and the coordinated optimization of the energy supply of the multi-energy complementarity of the electric and thermal network are fully considered to improve the overall energy utilization efficiency. In addition, a new optimization path is provided for the existing wind-solar-hydrogen-storage multi-energy microgrid, enabling it to better adapt to the dynamic changes of the power grid, meet the needs of different loads, and provide a more stable and economical energy supply.

[0076] Embodiment 2:

[0077] This embodiment provides an energy storage configuration system based on a wind-solar-hydrogen-storage multi-energy microgrid topology, including:

[0078] The wind-solar-hydrogen-storage multi-energy microgrid topology system establishment module is configured to: establish a wind-solar-hydrogen-storage multi-energy microgrid topology system; wherein, in the wind-solar-hydrogen-storage multi-energy microgrid topology system, the busbars are divided into DC medium-voltage busbars, DC low-voltage busbars, AC medium-voltage busbars and AC low-voltage busbars, the power grid is only connected to the AC medium-voltage busbars and the AC low-voltage busbars, and the buses are interconnected through converters and transformers;

[0079] The configuration mathematical model establishment module is configured as follows: considering the installation investment cost and operation and maintenance cost of the wind-solar-hydrogen-storage multi-energy microgrid topology system, taking the minimization of the net present value of the investment cost required for the wind-solar-hydrogen-storage multi-energy microgrid topology system in the entire life cycle as the optimization goal, taking the wind power generation and photovoltaic power generation capacity on each bus and the power distribution during operation as constraints, and establishing a configuration mathematical model;

[0080] The energy storage configuration module is configured to: perform energy storage configuration using an established configuration mathematical model.

[0081] The working method of the system is the same as the energy storage configuration method based on the wind, solar, hydrogen and storage multi-energy microgrid topology in Example 1, and will not be repeated here.

[0082] Embodiment 3:

[0083] This embodiment provides a computer-readable storage medium having a computer program stored thereon. When the program is executed by a processor, the steps of the energy storage configuration method based on the wind-solar-hydrogen-storage multi-energy microgrid topology described in Example 1 are implemented.

[0084] Embodiment 4:

[0085] This embodiment provides an electronic device, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor. When the processor executes the program, the steps of the energy storage configuration method based on the wind, solar, hydrogen and storage multi-energy microgrid topology described in Example 1 are implemented.

[0086] Embodiment 5:

[0087] This embodiment provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the steps of the energy storage configuration method based on the wind-solar-hydrogen-storage multi-energy microgrid topology described in Example 1 are implemented.

[0088] The above description is only a preferred embodiment of the present embodiment and is not intended to limit the present embodiment. For those skilled in the art, the present embodiment may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present embodiment shall be included in the protection scope of the present embodiment.

Claims

1. The energy storage configuration method based on wind, solar, hydrogen and storage multi-energy microgrid topology is characterized by: include: Establish a wind, solar, hydrogen and storage multi-energy microgrid topology system; in which, the busbars are divided into DC medium-voltage busbars, DC low-voltage busbars, AC medium-voltage busbars and AC low-voltage busbars, and the power grid is only connected to the AC medium-voltage busbars and AC low-voltage busbars. The buses are interconnected through converters and transformers; Considering the installation investment cost and operation and maintenance cost of the wind-solar-hydrogen-storage multi-energy microgrid topology system, the optimization goal is to minimize the net present value of the investment cost of the wind-solar-hydrogen-storage multi-energy microgrid topology system throughout its life cycle. The wind power generation and photovoltaic power generation capacity on each bus and the power distribution during operation are used as constraints to establish a configuration mathematical model. Energy storage configuration is carried out using the established configuration mathematical model.

2. The energy storage configuration method based on wind, solar, hydrogen and storage multi-energy microgrid topology according to claim 1 is characterized in that: One side of the busbar is equipped with a power grid, a photovoltaic power generation system, a wind power generation system and an electric boiler, and the other side is equipped with an electric load, a hydrogen energy storage system and a battery; the hydrogen energy storage system includes an electrolyzer, a hydrogen storage tank and a fuel cell; the hydrogen energy storage system and the electric boiler are connected to a thermal load.

3. The energy storage configuration method based on wind, solar, hydrogen and storage multi-energy microgrid topology according to claim 1 is characterized in that: The objective function is: Among them, C buy,q and C opt,q W is the unit installation cost and operation and maintenance cost during the operation of the equipment; q is the design capacity of equipment q; P opt,q,t is the operating power of device q at time t; and C buyheat,t The price of electricity purchased from the grid and the price of heat purchased from the heat grid; and P buyheat,t is the energy purchase amount of the power grid and heat network; i is the discount rate; l is the system life.

4. The energy storage configuration method based on wind, solar, hydrogen and storage multi-energy microgrid topology according to claim 1 is characterized in that: At any time t, the input and output power on each bus are equal: Among them, P buytoi,t P is the amount of electricity purchased by bus i from the power grid at time t; WTtoi,t , P PVtoi,t are the power supplied to bus i by wind power and photovoltaic power at time t; η Htogrid and η gridtoH represent the fuel cell discharge efficiency and electrolyzer efficiency respectively; P is the power supply from bus i to the electrolyzer and the power supply from the fuel cell to bus i at time t; needi,t , P needheat,t is the electrical load and thermal load demand of bus i at time t; P itoheat,t P is the power supply energy for the electric boiler on bus i; heatsource,t Supply power to the heat source.

5. The energy storage configuration method based on wind, solar, hydrogen and storage multi-energy microgrid topology according to claim 1 is characterized in that: The mathematical model of hydrogen energy storage system and battery is: in, is the hydrogen energy stored at time t; The battery stores electrical energy at time t; is a binary variable used to determine the charging and discharging status of the hydrogen energy storage system; is a binary variable used to judge the battery charge and discharge; δt is the time interval; is the minimum and maximum SOC of the hydrogen energy storage system; is the minimum and maximum SOC of the battery; The minimum and maximum charge capacity for the hydrogen energy storage system; is the minimum and maximum discharge capacity of the hydrogen energy storage system; The minimum and maximum charge capacity of the battery; is the minimum and maximum discharge capacity of the battery.

6. The energy storage configuration method based on wind, solar, hydrogen and storage multi-energy microgrid topology according to claim 1 is characterized in that: In the wind-solar-hydrogen-storage multi-energy microgrid topology system, the wind power generation system and the photovoltaic power generation system are connected to different busbars for operation during the process of supplying energy to the busbar, and the energy transmission direction of each node is restricted. The hydrogen energy storage system and the battery in the wind-solar-hydrogen-storage multi-energy microgrid topology system are constrained on the daily starting and ending states and the operating states, and the energy stored in the hydrogen energy storage system at the beginning of each day is limited to half of the design capacity, which is used for nighttime energy supply and waste heat heating, and the climbing rate of the hydrogen energy storage system is limited.

7. The energy storage configuration system based on wind, solar, hydrogen and storage multi-energy microgrid topology is characterized by: include: The wind-solar-hydrogen-storage multi-energy microgrid topology system establishment module is configured to: establish a wind-solar-hydrogen-storage multi-energy microgrid topology system; wherein, in the wind-solar-hydrogen-storage multi-energy microgrid topology system, the busbars are divided into DC medium-voltage busbars, DC low-voltage busbars, AC medium-voltage busbars and AC low-voltage busbars, the power grid is only connected to the AC medium-voltage busbars and the AC low-voltage busbars, and the buses are interconnected through converters and transformers; The configuration mathematical model establishment module is configured as follows: considering the installation investment cost and operation and maintenance cost of the wind-solar-hydrogen-storage multi-energy microgrid topology system, taking the minimization of the net present value of the investment cost required for the wind-solar-hydrogen-storage multi-energy microgrid topology system in the entire life cycle as the optimization goal, taking the wind power generation and photovoltaic power generation capacity on each bus and the power distribution during operation as constraints, and establishing a configuration mathematical model; The energy storage configuration module is configured to: perform energy storage configuration using an established configuration mathematical model.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the energy storage configuration method based on the wind, solar, hydrogen and storage multi-energy microgrid topology as described in any one of claims 1 to 6 are implemented.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and capable of running on the processor, characterized in that: When the processor executes the program, it implements the steps of the energy storage configuration method based on the wind, solar, hydrogen and storage multi-energy microgrid topology as described in any one of claims 1-6.

10. A computer program product, characterized in that The computer program product includes a computer program, and when the computer program is executed by a processor, the steps of the energy storage configuration method based on the wind, solar, hydrogen and storage multi-energy microgrid topology as described in any one of claims 1 to 6 are implemented.

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