Grid-connected mode control method, system and equipment of wind-light-hydrogen combined energy storage power generation system EMS and medium
By adopting the grid-connected mode control method of the wind-solar-hydrogen combined energy storage power generation system EMS, the problem of insufficient consideration of abnormal conditions in complex energy storage power generation systems in the existing technology is solved. This method achieves protection of subsystems and improvement of system efficiency, prioritizes the use of wind energy and energy storage batteries, and prevents overload.
Patent Information
- Application Number
- CN202511123322.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-12
- Publication Date
- 2025-11-11
AI Technical Summary
Existing grid-connected control methods do not comprehensively consider abnormal situations in complex energy storage power generation systems. They lack a comprehensive consideration of subsystem failures, energy storage battery state of charge, hydrogen storage system margin and power requests, and fail to effectively protect subsystem lifespan and improve overall efficiency.
This paper provides a grid-connected mode control method for a wind-solar-hydrogen combined energy storage power generation system (EMS). By judging the system's operating status, starting and stopping the system and allocating power to each subsystem, the method prioritizes the use of wind power, solar power, and energy storage batteries, and rationally allocates the power of fuel cells and hydrogen production systems to prevent subsystem overload and achieve efficient grid connection of the system.
It achieves comprehensive consideration of abnormal situations for complex energy storage and power generation systems, protects the lifespan of subsystems, improves the grid connection efficiency and overall efficiency of the system, prioritizes the use of wind energy and energy storage batteries, and prevents subsystem overload.
Smart Images
Figure CN120934059A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of energy storage power generation, and in particular to a grid-connected mode control method, system, equipment and medium for a wind-solar-hydrogen combined energy storage power generation system (EMS). Background Technology
[0002] For complex energy storage and power generation systems, most existing research focuses on exploring the system architecture, while research on control methods for such systems is relatively lacking.
[0003] Existing grid-connected control methods are mostly limited to simple systems and cannot comprehensively handle abnormal situations. They generally lack consideration for subsystem failures, excessively high or low SOC of energy storage batteries, excessive or insufficient hydrogen reserves in hydrogen storage subsystems, and excessive or insufficient power requests. Furthermore, existing grid-connected control methods have simple logic for setting subsystem power and lack consideration for subsystem lifespan and overall efficiency. Summary of the Invention
[0004] To address the aforementioned issues, this application provides a grid-connected mode control method, system, equipment, and medium for a wind-solar-hydrogen combined energy storage power generation system (EMS).
[0005] To achieve the above objectives, this application provides the following solution:
[0006] In a first aspect, this application provides a grid-connected mode control method for a wind-solar-hydrogen combined energy storage power generation system (EMS). The wind-solar-hydrogen combined energy storage power generation system includes a wind power-solar electronics system, a fuel cell subsystem, a hydrogen production subsystem, a hydrogen storage subsystem, an energy storage battery, an energy storage converter, and an energy management subsystem. The grid-connected mode control method includes:
[0007] Determine the operating status of the wind-solar-hydrogen combined energy storage power generation system; the operating status includes normal operation status, functionally limited status, and inoperable status.
[0008] When it is determined that the wind-solar-hydrogen combined energy storage power generation system is in normal operation or functional limitation, the energy storage converter is started and the contactor of the energy storage battery is closed to enter the grid-connected mode.
[0009] The system sequentially determines whether to start or stop the wind power photovoltaic system, the fuel cell subsystem, and the hydrogen production subsystem, and then allocates power to the started fuel cell subsystem or hydrogen production subsystem.
[0010] When a command to exit grid connection mode is received, the wind power photovoltaic system, fuel cell subsystem, hydrogen production subsystem, and energy storage converter are shut down, and the contactor of the energy storage battery is disconnected, thus exiting grid connection mode.
[0011] Secondly, this application provides a grid-connected mode control system for a wind-solar-hydrogen combined energy storage power generation system (EMS), wherein the grid-connected mode control system is applied to the grid-connected mode control method of the wind-solar-hydrogen combined energy storage power generation system (EMS) according to any one of claims 1-7, and the grid-connected mode control system includes:
[0012] The operation status determination module is used to determine the operation status of the wind-solar-hydrogen combined energy storage power generation system; the operation status includes normal operation status, functionally limited status, and inoperable status;
[0013] The grid-connected mode entry module is used to start the energy storage converter and close the contactor of the energy storage battery to enter the grid-connected mode when it is determined that the wind-solar-hydrogen combined energy storage power generation system is in normal operation or functional limitation.
[0014] The start / stop judgment and power allocation module is used to sequentially determine whether to start or stop the wind power photovoltaic system, the fuel cell subsystem and the hydrogen production subsystem, and to allocate power to the started fuel cell subsystem or hydrogen production subsystem.
[0015] The grid connection mode exit module is used to shut down the wind power photovoltaic system, fuel cell subsystem, hydrogen production subsystem and energy storage converter, and disconnect the contactor of the energy storage battery when it receives an exit grid connection mode command, thus exiting the grid connection mode.
[0016] Thirdly, this application provides a computer device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the above-described grid-connected mode control method for a wind-solar-hydrogen combined energy storage power generation system (EMS).
[0017] Fourthly, this application provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the above-described grid-connected mode control method for a wind-solar-hydrogen combined energy storage power generation system (EMS).
[0018] According to the specific embodiments provided in this application, this application has the following technical effects:
[0019] (1) Wide range of subsystems involved: This application considers multiple subsystems such as wind power optoelectronic system, fuel cell subsystem, hydrogen production subsystem, hydrogen storage subsystem, energy storage battery, and energy storage converter, and considers all mainstream subsystem types that may be used in grid connection mode.
[0020] (2) Comprehensive consideration of abnormal situations: In the start-up and shutdown judgment of wind power photovoltaic system, fuel cell subsystem and hydrogen production subsystem, various abnormal situations such as subsystem failure, excessively high or low state of charge (SOC) of energy storage battery, excessive or insufficient hydrogen reserve in hydrogen storage subsystem, and excessive or insufficient power request are considered.
[0021] (3) Lifespan friendly to subsystems: The power allocation between the fuel cell subsystem and the hydrogen production subsystem takes into account the recommended charging and discharging power of the energy storage battery, the maximum output power of the fuel cell subsystem, and the maximum input power of the hydrogen production subsystem, to prevent subsystem overload operation and to be lifespan friendly to subsystems.
[0022] (4) High energy storage and power generation efficiency: Wind and solar energy are primary energy sources, so wind power and photovoltaic systems are preferred; the short-term energy storage efficiency of energy storage batteries is higher than that of hydrogen, so the output priority of energy storage batteries is higher than that of fuel cell subsystems when generating electricity, and the input priority of energy storage batteries is higher than that of hydrogen production subsystems when storing energy. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 This is a schematic diagram of the composition of a wind-solar-hydrogen combined energy storage power generation system.
[0025] Figure 2 A schematic flowchart of a grid-connected mode control method for a wind-solar-hydrogen combined energy storage power generation system (EMS) provided in an embodiment of this application;
[0026] Figure 3 A detailed flowchart illustrating a grid-connected mode control method for a wind-solar-hydrogen combined energy storage power generation system (EMS) provided in an embodiment of this application. Detailed Implementation
[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0028] This application protects a grid-connected mode control method for a wind-solar-hydrogen combined energy storage power generation system (EMS, i.e., the energy management subsystem in this application). This method applies to a wind-solar-hydrogen combined energy storage power generation system composed of a wind power-solar-electronics system, a fuel cell subsystem, a hydrogen production subsystem, a hydrogen storage subsystem, an energy storage battery, an energy storage converter, and the EMS, as well as all subsets of such a system. The composition of the wind-solar-hydrogen combined energy storage power generation system is as follows... Figure 1 As shown, Figure 1 Solid lines represent power electrical connections, dashed lines represent control signal connections, and dotted lines represent pipeline connections.
[0029] This method is geared towards grid-connected operation scenarios. It generally follows these steps: determining whether the wind-solar-hydrogen combined energy storage power generation system can operate; determining the start / stop of the wind power and solar power systems; determining the start / stop of the fuel cell subsystem and setting its power; determining the start / stop of the hydrogen production subsystem and setting its power; and determining whether to exit grid-connected mode.
[0030] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0031] In one exemplary embodiment, such as Figure 2 As shown, a grid-connected mode control method for a wind-solar-hydrogen combined energy storage power generation system (EMS) is provided, including the following steps S1 to S4.
[0032] S1: Determine the operating status of the wind-solar-hydrogen combined energy storage power generation system; the operating status includes normal operation status, functionally limited status, and inoperable status.
[0033] Specifically, when both the Power Conversion System (PCS) and the energy storage battery are functioning correctly, the wind-solar-hydrogen combined energy storage power generation system is in normal operation or functionally limited operation. In this case, the PCS can be activated and the contactor of the energy storage battery can be closed. If either the PCS or the energy storage battery is faulty, the wind-solar-hydrogen combined energy storage power generation system cannot operate and all subsystems (wind power-solar-electronic system, fuel cell subsystem, and hydrogen production subsystem) need to be shut down and the system exited grid connection mode.
[0034] S2: When it is determined that the wind-solar-hydrogen combined energy storage power generation system is in normal operation or functional limitation, start the energy storage converter and close the contactor of the energy storage battery to enter the grid-connected mode.
[0035] S3: Determine whether to start or stop the wind-solar optoelectronic system, fuel cell subsystem, and hydrogen production subsystem in sequence, and perform power distribution for the started fuel cell subsystem or hydrogen production subsystem.
[0036] (1) Judgment on starting and stopping of wind-solar optoelectronic system
[0037] When the wind-solar optoelectronic system has no faults and there is a consumption destination for the energy generated by the wind-solar optoelectronic system (SOC is less than the second state of charge threshold S2, that is, the energy storage battery can be charged; or, the hydrogen surplus H2R of the hydrogen storage subsystem is less than the second hydrogen surplus threshold H2, that is, the hydrogen storage subsystem can be charged; or, the set power of the energy storage inverter is greater than zero, that is, the system needs to output power to the grid), start the wind-solar optoelectronic system, otherwise shut down the wind-solar optoelectronic system.
[0038] (2) Judgment on starting and stopping of fuel cell subsystem and power setting
[0039] Judge whether it is necessary to start or stop the fuel cell subsystem: When SOC > S1 (that is, it can discharge) and P pcs_set >P wp +P bms_rd , or the SOC of the energy storage battery < S1 (that is, it cannot discharge) and P pcs_set >P wp , that is, relying on the energy storage battery and the wind-solar optoelectronic system cannot meet the power output of the PCS to the grid. At this time, start the fuel cell subsystem. When P pcs_set <P wp , that is, at this time, the output energy of the wind-solar optoelectronic system is surplus, and the energy storage battery can be charged and hydrogen can be produced. At this time, shut down the fuel cell subsystem. Except for the above two situations, the on-off state of the fuel cell subsystem remains the previous state. Through this method, hysteresis is achieved to prevent frequent start and stop caused by parameter fluctuations near the threshold. P pcs_set is the set power of the energy storage inverter, S1 is the first state of charge threshold, P wp is the output power of the wind-solar optoelectronic system, P bms_rd is the recommended discharge power of the energy storage battery.
[0040] Note: The power setting value P pcs_set (that is, the overall system output power setting value) is determined by the grid dispatching algorithm, or the higher-level power management algorithm in the energy storage power generation system software, or set manually by the user. This value is used as the input of this method, rather than the output.
[0041] When a fuel cell subsystem failure occurs, or a hydrogen storage subsystem failure occurs, or the residual hydrogen in the hydrogen storage subsystem is insufficient (i.e., the hydrogen gas margin H2R of the hydrogen storage subsystem is less than the first hydrogen margin threshold H1) and hydrogen cannot be released, the fuel cell subsystem shall be shut down regardless of whether it is necessary to start the fuel cell subsystem. When there is no such situation, the fuel cell subsystem shall be started or stopped according to actual requirements.
[0042] The power distribution of the fuel cell subsystem is as follows:
[0043] When the fuel cell subsystem is not started, the output power P of the fuel cell subsystem fcs is set to 0.
[0044] When it is necessary to start the fuel cell subsystem and the energy storage battery can be charged, P fcs = P pcs_set - P wp + P bms_rc , that is, at this time, the wind power and optoelectronic subsystem and the fuel cell subsystem output electric energy, and the power grid and the energy storage battery consume electric energy. P bms_rc is the recommended charging power of the energy storage battery.
[0045] When it is necessary to start the fuel cell subsystem and the energy storage battery cannot be charged, then P fcs = P pcs_set - P wp , that is, at this time, the wind power and optoelectronic subsystem and the fuel cell subsystem output electric energy, and the power grid consumes electric energy.
[0046] When the set power P of the fuel cell subsystem fcs_set exceeds the maximum output power P of the fuel cell subsystem fcs_max , P fcs_set = P fcs_max , and this part of the difference will be borne by the energy storage battery.
[0047] (3) Hydrogen production subsystem start / stop judgment and power setting
[0048] Judge whether it is necessary to start or stop the hydrogen production subsystem: When SOC < S2 (i.e., it can be charged) and P pcs_set < P wp - P bms_rc , or SOC > S2 (i.e., it cannot be charged) and P pcs_set < P wp , that is, the power output of the energy storage battery and PCS to the power grid cannot consume the electric energy generated by the wind power and optoelectronic subsystem. At this time, start the hydrogen production subsystem. When P pcs_set > P wpIn cases where the wind power and photovoltaic system are insufficient to support power output to the grid, and an auxiliary output from an energy storage battery or fuel cell subsystem is required, the hydrogen production subsystem is shut down. Apart from these two situations, the hydrogen production subsystem maintains its previous on / off state. This method achieves hysteresis, preventing frequent start-ups and shutdowns caused by parameter fluctuations near thresholds.
[0049] If a hydrogen production subsystem or a hydrogen storage subsystem malfunctions, or if the hydrogen storage subsystem has excessive residual hydrogen (i.e., the residual hydrogen H2R in the hydrogen storage subsystem is greater than the second residual hydrogen threshold H2) and cannot be refilled, the hydrogen production subsystem must be shut down regardless of whether it needs to be started. If none of the above situations apply, the hydrogen production subsystem should be started or stopped according to actual needs. Where H2 > H1.
[0050] The power distribution of the hydrogen production subsystem is as follows:
[0051] When the hydrogen production subsystem is not activated, the hydrogen production power P of the hydrogen production subsystem is... hpm Set it to 0.
[0052] When the hydrogen production subsystem needs to be started and the energy storage battery is rechargeable, P hpm =P wp -P bms_rc -P pcs_set This means that at this time, the wind power photovoltaic system outputs electrical energy, and the power grid, energy storage battery and hydrogen production subsystem absorb the electrical energy.
[0053] When the hydrogen production subsystem needs to be started and the energy storage battery cannot be recharged, P hpm =P wp -P pcs_set This means that at this time, the wind power photovoltaic system outputs electrical energy, and the power grid and hydrogen production subsystem absorb the electrical energy.
[0054] When the hydrogen production subsystem's set hydrogen production power P hpm_set Exceeding the maximum hydrogen production capacity P of the hydrogen production subsystem hpm_max At that time, P hpm_set =P hpm_max This difference will be borne by the energy storage battery.
[0055] S4: When a command to exit grid connection mode is received, shut down the wind power photovoltaic system, fuel cell subsystem, hydrogen production subsystem and energy storage converter, and disconnect the contactor of the energy storage battery to exit grid connection mode.
[0056] Determine whether the host computer command requires the wind-solar-hydrogen combined energy storage power generation system to exit grid-connected mode. If so, shut down the subsystem and exit the mode. If not, repeat steps S1-S4.
[0057] Figure 3 For a more detailed flowchart of the steps, Figure 3 In the middle, Efcs_set This is the enable command for the fuel cell subsystem; 1 indicates enable, 0 indicates disable. wp_avg For wind power optoelectronic systems with a filtering time T f Average power within; E wp_set This is the enable command for the wind power photovoltaic system; 1 indicates enable, 0 indicates disable. hpm_set This is the enable command for the hydrogen production subsystem; 1 means enable, and 0 means disable.
[0058] The power generation priority and energy storage priority (from highest to lowest) in this application are as follows:
[0059] Power generation: ① Wind power and photovoltaic system ② Energy storage battery ③ Fuel cell subsystem.
[0060] Energy storage: ① Energy storage battery ② Hydrogen production subsystem.
[0061] It should be noted that this application is also applicable to energy storage power generation systems that consist of only some of the subsystems; simply delete the non-existent subsystems or treat them as faults.
[0062] Based on the same inventive concept, this application also provides a grid-connected mode control system for a wind-solar-hydrogen combined energy storage power generation system (EMS). The solution provided by this system is similar to the solution described in the above method. Therefore, the specific limitations of one or more embodiments of the grid-connected mode control system for a wind-solar-hydrogen combined energy storage power generation system (EMS) provided below can be found in the limitations of the grid-connected mode control method for the wind-solar-hydrogen combined energy storage power generation system (EMS) described above, and will not be repeated here.
[0063] In one exemplary embodiment, a grid-connected mode control system for a wind-solar-hydrogen combined energy storage power generation system (EMS) is provided, comprising:
[0064] The operation status determination module is used to determine the operation status of the wind-solar-hydrogen combined energy storage power generation system; the operation status includes normal operation status, functionally limited status, and inoperable status;
[0065] The grid-connected mode entry module is used to start the energy storage converter and close the contactor of the energy storage battery to enter the grid-connected mode when it is determined that the wind-solar-hydrogen combined energy storage power generation system is in normal operation or functional limitation.
[0066] The start / stop judgment and power allocation module is used to sequentially determine whether to start or stop the wind power photovoltaic system, the fuel cell subsystem and the hydrogen production subsystem, and to allocate power to the started fuel cell subsystem or hydrogen production subsystem.
[0067] The grid connection mode exit module is used to shut down the wind power photovoltaic system, fuel cell subsystem, hydrogen production subsystem and energy storage converter, and disconnect the contactor of the energy storage battery when it receives an exit grid connection mode command, thus exiting the grid connection mode.
[0068] In an exemplary embodiment, a computer device is provided, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the steps in the above-described method embodiments. The computer device can be a server or a terminal. The computer device includes a processor, a memory, an input / output interface (I / O), and a communication interface. The processor, memory, and I / O are connected via a system bus, and the communication interface is connected to the system bus via the I / O interface. The processor of the computer device provides computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and computer program in the non-volatile storage medium. The database of the computer device stores data to be processed. The I / O interface of the computer device is used for exchanging information between the processor and external devices. The communication interface of the computer device is used for communicating with external terminals via a network connection. When the computer program is executed by the processor, it implements a grid-connected mode control method for a wind-solar-hydrogen combined energy storage power generation system (EMS).
[0069] In one exemplary embodiment, a computer-readable storage medium is provided storing a computer program that, when executed by a processor, implements the steps in the above-described method embodiments.
[0070] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.
[0071] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM).
[0072] The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.
[0073] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0074] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.
Claims
1. A grid-connected mode control method for a wind-solar-hydrogen combined energy storage power generation system (EMS), the wind-solar-hydrogen combined energy storage power generation system comprising a wind power-solar electronics system, a fuel cell subsystem, a hydrogen production subsystem, a hydrogen storage subsystem, an energy storage battery, an energy storage converter, and an energy management subsystem, characterized in that, The grid connection mode control method includes: Determine the operating status of the wind-solar-hydrogen combined energy storage power generation system; the operating status includes normal operation status, functionally limited status, and inoperable status. When it is determined that the wind-solar-hydrogen combined energy storage power generation system is in normal operation or functional limitation, the energy storage converter is started and the contactor of the energy storage battery is closed to enter the grid-connected mode. The system sequentially determines whether to start or stop the wind power photovoltaic system, the fuel cell subsystem, and the hydrogen production subsystem, and then allocates power to the started fuel cell subsystem or hydrogen production subsystem. When a command to exit grid connection mode is received, the wind power photovoltaic system, fuel cell subsystem, hydrogen production subsystem, and energy storage converter are shut down, and the contactor of the energy storage battery is disconnected, thus exiting grid connection mode.
2. The grid-connected mode control method of the wind-solar-hydrogen combined energy storage power generation system EMS according to claim 1, characterized in that, When it is determined that the wind-solar-hydrogen combined energy storage power generation system is in an inoperable state, the wind power-solar electronics system, fuel cell subsystem, and hydrogen production subsystem are shut down, and the grid connection mode is exited.
3. The grid-connected mode control method of the wind-solar-hydrogen combined energy storage power generation system EMS according to claim 1, characterized in that, Determining the operating status of a wind-solar-hydrogen combined energy storage power generation system specifically includes: When both the energy storage converter and the energy storage battery are fault-free, it is determined that the wind-solar-hydrogen combined energy storage power generation system is in normal operation or functionally limited state. When the energy storage converter or energy storage battery malfunctions, it is determined that the wind-solar-hydrogen combined energy storage power generation system is in an inoperable state.
4. The grid-connected mode control method of the wind-solar-hydrogen combined energy storage power generation system EMS according to claim 1, characterized in that, The system sequentially determines whether to start or stop the wind power-photoelectronic system, the fuel cell subsystem, and the hydrogen production subsystem, specifically including: The wind power photovoltaic system is activated when there are no faults in the system and the energy generated by the system has a destination for consumption; otherwise, the system is shut down. The fuel cell subsystem is activated when the state of charge (SBC) of the energy storage battery is greater than the first SBC threshold and the set power of the energy storage converter is greater than the sum of the output power of the wind power-photovoltaic system and the recommended discharge power of the energy storage battery; or, the fuel cell subsystem is activated when the SBC of the energy storage battery is less than the first SBC threshold and the set power of the energy storage converter is greater than the output power of the wind power-photovoltaic system; and the fuel cell subsystem is shut down when the set power of the energy storage converter is less than the output power of the wind power-photovoltaic system. The hydrogen production subsystem is activated when the state of charge (SOC) of the energy storage battery is less than the second SOC threshold and the set power of the energy storage converter is less than the difference between the output power of the wind power-photovoltaic system and the recommended charging power of the energy storage battery; or, the hydrogen production subsystem is activated when the SOC of the energy storage battery is greater than the second SOC threshold and the set power of the energy storage converter is less than the output power of the wind power-photovoltaic system; and the hydrogen production subsystem is shut down when the set power of the energy storage converter is greater than the output power of the wind power-photovoltaic system.
5. The grid-connected mode control method of the wind-solar-hydrogen combined energy storage power generation system EMS according to claim 1, characterized in that, When the fuel cell subsystem or the hydrogen storage subsystem malfunctions, or when the hydrogen reserve H2R of the hydrogen storage subsystem is less than the first hydrogen reserve threshold H1, the fuel cell subsystem is shut down.
6. The grid-connected mode control method of the wind-solar-hydrogen combined energy storage power generation system EMS according to claim 1, characterized in that, When the hydrogen production subsystem or the hydrogen storage subsystem malfunctions, and the hydrogen reserve H2R of the hydrogen storage subsystem is greater than the second hydrogen reserve threshold H2, the hydrogen production subsystem is shut down; H2>H1.
7. The grid-connected mode control method of the wind-solar-hydrogen combined energy storage power generation system EMS according to claim 1, characterized in that, Power allocation is performed on the activated fuel cell subsystem or hydrogen production subsystem, specifically including: When the fuel cell subsystem is not activated, the output power P of the fuel cell subsystem is... fcs =0; When the fuel cell subsystem needs to be started and the energy storage battery can be charged, P fcs =P pcs_set -P wp +P bms_rc , where P pcs_set P is the set power of the energy storage converter. wp P represents the output power of the wind power optoelectronic system. bms_rc Recommended charging power for energy storage batteries; When the fuel cell subsystem needs to be started and the energy storage battery cannot be charged, P fcs =P pcs_set -P wp ; When the set power P of the fuel cell subsystem fcs_set Exceeding the maximum output power P of the fuel cell subsystem fcs_max At that time, P fcs_set =P fcs_max ; When the hydrogen production subsystem is not activated, the hydrogen production power P of the hydrogen production subsystem is... hpm =0; When the hydrogen production subsystem needs to be started and the energy storage battery can be charged, P hpm =P wp -P bms_rc -P pcs_set ; When the hydrogen production subsystem needs to be started and the energy storage battery cannot be charged, P hpm =P wp -P pcs_set ; When the hydrogen production subsystem's set hydrogen production power P hpm_set Exceeding the maximum hydrogen production capacity P of the hydrogen production subsystem hpm_max At that time, P hpm_set =P hpm_max .
8. A grid-connected mode control system for a wind-solar-hydrogen combined energy storage power generation system (EMS), characterized in that, The grid-connected mode control system is applied to the grid-connected mode control method of the wind-solar-hydrogen combined energy storage power generation system (EMS) according to any one of claims 1-7, and the grid-connected mode control system includes: The operation status determination module is used to determine the operation status of the wind-solar-hydrogen combined energy storage power generation system; the operation status includes normal operation status, functionally limited status, and inoperable status; The grid-connected mode entry module is used to start the energy storage converter and close the contactor of the energy storage battery to enter the grid-connected mode when it is determined that the wind-solar-hydrogen combined energy storage power generation system is in normal operation or functional limitation. The start / stop judgment and power allocation module is used to sequentially determine whether to start or stop the wind power photovoltaic system, the fuel cell subsystem and the hydrogen production subsystem, and to allocate power to the started fuel cell subsystem or hydrogen production subsystem. The grid connection mode exit module is used to shut down the wind power photovoltaic system, fuel cell subsystem, hydrogen production subsystem and energy storage converter, and disconnect the contactor of the energy storage battery when it receives an exit grid connection mode command, thus exiting the grid connection mode.
9. A computer device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor executes the computer program to implement the grid-connected mode control method of the wind-solar-hydrogen combined energy storage power generation system (EMS) according to any one of claims 1-7.
10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the grid-connected mode control method of the wind-solar-hydrogen combined energy storage power generation system EMS as described in any one of claims 1-7.