Electronic device, off-grid wind and solar hydrogen production system and control method thereof

Abstract

This application provides an electronic device, an off-grid wind-powered photovoltaic hydrogen production system, and a control method thereof, relating to the field of power technology. The method is applied to the control center of an off-grid wind-powered photovoltaic hydrogen production system. The control center is communicatively connected to a subgrid, which includes a wind power station, a photovoltaic power station, an energy storage station, a fuel cell power station, and a water electrolysis hydrogen production station. When multiple subgrids are included, they are electrically isolated. The method includes: obtaining the wind power and photovoltaic power generated by the wind power station and the photovoltaic power station, respectively, for each subgrid; calculating the total power generation based on the wind power and photovoltaic power; and controlling the power of at least one of the energy storage station, fuel cell power station, and water electrolysis hydrogen production station based on the total power generation to achieve power balance. Thus, by controlling the energy storage station, fuel cell power station, and water electrolysis hydrogen production station, the power generation of the wind power station and the photovoltaic power station can be tracked to achieve real-time balance.

Description

Technical Field

[0001] This application relates to the field of power technology, and more specifically, to an electronic device, an off-grid wind power photovoltaic hydrogen production system, and a control method thereof. Background Technology

[0002] To reduce carbon dioxide emissions and mitigate global warming and its negative impacts, it is necessary to reduce the use of petrochemical raw materials. New energy sources such as wind, solar, hydro, and geothermal energy are clean. With the development of renewable energy, utilizing renewable energy for water electrolysis to produce hydrogen, coupled with high-energy-consuming and high-emission industries, has become a new green industrial transformation and upgrading technology.

[0003] Hydrogen production from wind power, photovoltaics, and other new energy sources is one of the promising technological pathways for green feedstocks and fuels in the medium to long term. Green hydrogen can be used as a feedstock for green chemical production, or as a fuel for further carbon emission reduction in thermal power plants through hydrogen blending and combustion. Green hydrogen is also one of the key green fuels that the national heavy-duty transportation industry is focusing on.

[0004] However, the fluctuating nature of new energy sources such as wind and solar power leads to poor grid absorption capacity, hindering their large-scale development due to grid limitations. Large-scale development of new energy sources in deserts, wastelands, and Gobi regions, integrating wind and solar power with electricity loads into off-grid systems, has become a key technological approach. Given the smaller scale of off-grid systems, addressing the volatility and intermittency of new energy generation and ensuring real-time, safe, and stable control of microgrids are critical technological challenges that need to be overcome. Summary of the Invention

[0005] This application provides a readable storage medium, an electronic device, an off-grid wind and photovoltaic hydrogen production system and its control method, which can realize the large-scale development of new energy and green hydrogen industries in areas without power grids or with weak power grids, and solve the problems of limited grid absorption capacity and off-grid system safety and stability in the large-scale development of new energy.

[0006] The embodiments of this application can be implemented as follows:

[0007] In a first aspect, embodiments of this application provide a control method for an off-grid wind-power photovoltaic hydrogen production system, applied to a control center within the off-grid wind-power photovoltaic hydrogen production system. The off-grid wind-power photovoltaic hydrogen production system includes at least one subnet communicatively connected to the control center. The subnet includes a wind power station, a photovoltaic power station, an energy storage station, a fuel cell power station, and a water electrolysis hydrogen production station. When multiple subnets are included, the multiple subnets are electrically isolated. The method includes:

[0008] For each of the subgrids, obtain the wind power output of the wind power station and the photovoltaic power output of the photovoltaic power station.

[0009] The total power generation is calculated based on the wind power and the photovoltaic power.

[0010] Based on the total power generation, the power of at least one of the energy storage station, fuel cell power station, and water electrolysis hydrogen production station is controlled to achieve power balance.

[0011] Secondly, embodiments of this application provide an off-grid wind-solar photovoltaic hydrogen production system. The system includes at least one subnetwork with communication connections. The subnetwork includes a wind power station, a photovoltaic power station, an energy storage station, a fuel cell power station, and a water electrolysis hydrogen production station. When multiple subnetworks are included, the multiple subnetworks are electrically isolated.

[0012] The wind power station and the photovoltaic power station are used to provide power to the subgrid;

[0013] The energy storage station is used to store electrical energy and provide electrical energy to the water electrolysis hydrogen production station in the subgrid.

[0014] The fuel cell power station is used to provide power to the water electrolysis hydrogen production station in the subgrid;

[0015] The water electrolysis hydrogen production station is used to produce hydrogen using the electrical energy provided by the subgrid.

[0016] The control center is used to control each of the subnets using the method described in any one of the foregoing embodiments to achieve power balance.

[0017] Thirdly, embodiments of this application provide a control device for an off-grid wind power-photovoltaic hydrogen production system, applied to a control center within the off-grid wind power-photovoltaic hydrogen production system. The off-grid wind power-photovoltaic hydrogen production system includes at least one subnetwork communicatively connected to the control center. The subnetwork includes a wind power station, a photovoltaic power station, an energy storage station, a fuel cell power station, and a water electrolysis hydrogen production station. When multiple subnetworks are included, the multiple subnetworks are electrically isolated. The device includes:

[0018] The information acquisition module is used to obtain the wind power output of the wind power station and the photovoltaic power output of the photovoltaic power station for each of the sub-networks.

[0019] The control module is used to calculate the total power generation based on the wind power and the photovoltaic power.

[0020] The control module is also used to control the power of at least one of the energy storage station, fuel cell power station and water electrolysis hydrogen production station according to the total power generation, so as to achieve power balance.

[0021] Fourthly, embodiments of this application provide an electronic device, including a processor and a memory, wherein the memory stores machine-executable instructions that can be executed by the processor, and the processor can execute the machine-executable instructions to implement the off-grid wind power photovoltaic hydrogen production system control method described in the foregoing embodiments.

[0022] Fifthly, embodiments of this application provide a readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the off-grid wind power photovoltaic hydrogen production system control method as described in the foregoing embodiments.

[0023] The embodiments of this application provide a readable storage medium, an electronic device, an off-grid wind and solar photovoltaic hydrogen production system, and a control method thereof. The off-grid wind and solar photovoltaic hydrogen production system includes a control center and at least one subnet communicatively connected to the control center. Each subnet includes a wind power station, a solar power station, an energy storage station, a fuel cell power station, and a water electrolysis hydrogen production station. When multiple subnets exist, the multiple subnets are electrically isolated. For each subnet, the control center obtains the wind power and solar power generated by the wind power station and the solar power generated by the solar power station in that subnet, and calculates the total power generation based on the wind power and solar power. Then, based on the total power generation, the control center controls the power of at least one of the energy storage station, the fuel cell power station, and the water electrolysis hydrogen production station to achieve power balance. In this way, the control center can track the power generation of wind power stations and photovoltaic power stations by controlling energy storage stations, fuel cell power stations and water electrolysis hydrogen production stations to achieve real-time balance. At the same time, this method is easy to control, reduces the complexity of the system's communication network and improves scalability. Furthermore, each subgrid is electrically independent, and the independent operation of multiple microgrids can reduce global power supply reliability issues caused by local failures. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is one of the schematic diagrams of an off-grid wind power-photovoltaic hydrogen production system provided in the embodiments of this application;

[0026] Figure 2 This is one of the schematic diagrams illustrating the setup of a hydrogen storage device provided in the embodiments of this application;

[0027] Figure 3 This is a second schematic diagram of the hydrogen storage device provided in the embodiments of this application;

[0028] Figure 4 This is the third schematic diagram of the hydrogen storage device provided in the embodiments of this application;

[0029] Figure 5 A second schematic diagram of an off-grid wind power-photovoltaic hydrogen production system provided in this application embodiment;

[0030] Figure 6 A block diagram illustrating an electronic device provided in an embodiment of this application;

[0031] Figure 7 A schematic flowchart illustrating the control method for an off-grid wind power-photovoltaic hydrogen production system provided in this application embodiment;

[0032] Figure 8 for Figure 7 A flowchart illustrating the sub-steps included in step S300;

[0033] Figure 9 A block diagram of the control device for an off-grid wind power photovoltaic hydrogen production system provided in an embodiment of this application.

[0034] Icons: 10-Off-grid wind and solar photovoltaic hydrogen production system; 11-Electronic equipment; 111-Memory; 112-Processor; 113-Communication unit; 100-Wind power station; 200-Photovoltaic power station; 300-Energy storage station; 400-Fuel cell power station; 500-Water electrolysis hydrogen production station; 900-Off-grid wind and solar photovoltaic hydrogen production system control device; 910-Information acquisition module; 920-Control module. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0037] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] The following is a brief description of the current off-grid system.

[0039] In the area of ​​off-grid systems for new energy sources such as wind and solar power, Chinese patent CN109194283A proposes an off-grid multi-energy complementary combined electric, hot, and gas supply system that integrates wind and solar power with seawater desalination, water electrolysis for hydrogen production, and high-temperature fuel cells, thus constructing a new energy off-grid system that provides electricity, hot water, hydrogen, and oxygen. However, due to the immaturity of high-temperature fuel cell technology, the small scale of the equipment, and its short lifespan, it is difficult to meet the safety and stability control requirements of large-scale off-grid wind and solar power systems, such as frequency regulation and peak shaving.

[0040] Chinese patent CN109193783B proposes an off-grid multi-energy complementary combined electric, hot, and gas power supply method. By proposing an energy management strategy to optimize equipment operation, it effectively solves the technical problem of implementing wind and power curtailment operations on the adopted new energy power generation system while meeting load requirements, thus avoiding the waste of a large amount of clean energy. However, this technical solution does not consider the frequency stability issue of the off-grid system, making it difficult to guarantee the safe and stable operation of large-scale off-grid systems.

[0041] Chinese patent CN112018814A proposes an integrated wind, solar, energy storage, hydrogen, and thermal renewable energy system, comprising wind power generation, photovoltaic power generation, energy storage, water electrolysis for hydrogen production, power boosting equipment, and hydrogen export pipelines, constructing a system capable of both off-grid and grid-connected operation. However, this system can only be off-grid for short periods in practice, still primarily operating on-grid, relying on the grid for regulation, making it difficult to develop new energy sources on a large scale in areas without or with weak grids.

[0042] Chinese patent CN111910210A proposes a multi-energy complementary wind-solar-storage-hydrogen integrated renewable energy system that operates in an isolated grid mode, without connection to the external power grid. It utilizes internal 1MPa-35MPa hydrogen pipelines for connection and external 1MPa-5MPa hydrogen delivery pipelines for gas transport. Chinese patent CN111900806A proposes a wind-solar-storage-hydrogen integrated renewable energy system utilizing plant-use hydrogen, including wind power generation equipment, solar photovoltaic power generation equipment, energy storage equipment, water electrolysis hydrogen production equipment, hydrogen storage devices, hydrogen fuel cells, and hydrogen delivery pipelines. The construction of a plant-use hydrogen system improves the safety and stability of the wind-solar-hydrogen storage integrated hydrogen production and supply system capable of isolated grid operation. However, the above solutions mainly provide start-up and control power to the off-grid system through energy storage equipment and fuel cells, lacking safety and stability control measures such as frequency regulation and peak shaving for the off-grid system.

[0043] Chinese patent CN113468723A proposes an optimized configuration method for an off-grid wind-solar-hydrogen-cooled energy system, comprising: photovoltaic panels, a wind turbine, a hydrogen storage unit consisting of a hydrogen tank, an electrolyzer, and a fuel cell, a steam-type chiller, ice storage, and a unit providing power load cooling. This method primarily optimizes equipment capacity through power balancing, without considering the safety and stability control issues of the off-grid system.

[0044] DC technology is also used in off-grid systems for new energy sources such as wind power and photovoltaics. For example, Chinese patent CN114389310A proposes a large-capacity off-grid wind-solar hybrid hydrogen production DC microgrid and its control method, including m medium-voltage AC subgrids, a medium-voltage DC distribution board, k DC / DC hydrogen production power supplies, r DC / AC inverter power supplies, and a low-voltage AC network power supply. Each medium-voltage AC subgrid includes a new energy power station, an energy storage device, and a medium-voltage AC distribution board. By using voltage-boosting constant-frequency control for the energy storage device, constant power control for the photovoltaic power station and wind turbine, and constant input DC voltage + constant output current control for the DC / DC hydrogen production power supply, the control objective of "load follows source" can be achieved. However, due to the high cost of medium-voltage DC equipment and the immaturity of control and protection equipment, it is difficult to meet the development requirements of large-scale wind power and photovoltaic off-grid systems.

[0045] Chinese patent CN114597974A proposes a power management and decomposition method for a renewable energy DC hydrogen production islanded system. This method ensures system stability under limited energy storage capacity by flexibly adjusting the power of the hydrogen production unit through a distribution coefficient, avoiding control mode switching between the battery storage unit and the renewable energy generation unit, and reducing the complexity of coordinated control of the wind-solar-hydrogen storage system. However, due to the limited capacity of the DC bus, this technical solution results in a relatively small system scale, making it difficult to meet the development needs of large-scale off-grid wind and solar power systems.

[0046] The above analysis reveals the following problems with current off-grid renewable energy hydrogen production systems:

[0047] (1) In the existing technology, hydrogen produced by new energy electricity is mainly stored in high-pressure gas storage tanks or liquid hydrogen storage tanks. The hydrogen storage and transportation costs of high-pressure tank trucks, hydrogen pipelines and other methods are high, which affects the economic efficiency of off-grid new energy electricity hydrogen production projects.

[0048] (2) In the existing technical solutions, multiple wind power stations and photovoltaic power stations in the large-capacity new energy hydrogen production system are connected to the AC grid. It is necessary to consider the frequency, phase angle, reactive power and other issues between different power sources, which leads to the communication network of the large-capacity off-grid system being complex, difficult to control and poor scalability.

[0049] (3) In existing technical solutions, when different renewable energy power plants are connected to the same AC power grid in a large-capacity off-grid system, voltage fluctuations and oscillations in different frequency bands are likely to occur, posing a significant safety risk to the entire system. Local short-circuit faults in a large-capacity off-grid system can affect the voltage and frequency at various nodes in the system, resulting in a wide fault range.

[0050] To address the challenges of system security and stability, as well as control difficulties, encountered in the large-scale development of off-grid renewable energy systems, this application proposes a readable storage medium, electronic equipment, a large-capacity off-grid wind and solar photovoltaic hydrogen production system, and its control method. The system includes wind power generation equipment, solar power generation equipment, energy storage equipment, water electrolysis hydrogen production equipment, hydrogen storage equipment, hydrogen pipelines, utilities, and auxiliary equipment. By enabling the energy storage equipment and water electrolysis hydrogen production equipment to track the power generation of wind and solar power in real time for balance, the system meets the frequency regulation and peak shaving requirements for the safe and stable operation of the microgrid system. This renewable energy green hydrogen production process employs flexible control technology, reducing the need for energy storage and improving system economics. The system uses hydrogen pipelines instead of high-pressure hydrogen tanks and liquid hydrogen tanks for transportation, enabling large-scale hydrogen transportation and reducing the cost of gas transportation.

[0051] Furthermore, the system provided in this application embodiment may include multiple subnets, which are electrically isolated, and each subnet is controlled separately to achieve power balance. This method is easy to control, reduces the complexity of the system's communication network, and improves scalability; moreover, the electrical independence of each subnet and the independent operation of multiple microgrids can reduce global power supply reliability problems caused by local faults.

[0052] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0053] To address the challenges of large-scale development of renewable energy in areas with no or weak power grids, and to promote localized renewable energy consumption and the development of the green chemical industry, this application provides a large-capacity off-grid wind and solar photovoltaic hydrogen production system. The hydrogen produced by this system is transported to hydrogen users in chemical industrial parks via hydrogen pipelines. This technical solution enables the large-scale development of renewable energy and green hydrogen industries in areas with no or weak power grids, solving the problems of limited grid absorption capacity and the safety and stability of off-grid systems in large-scale renewable energy development.

[0054] The following section will first explain the large-capacity off-grid wind power and photovoltaic hydrogen production system.

[0055] Please refer to Figure 1 , Figure 1 This is one of the schematic diagrams of an off-grid wind power and photovoltaic hydrogen production system 10 provided in an embodiment of this application. The off-grid wind power and photovoltaic hydrogen production system 10 may include: a wind power station 100, a photovoltaic power station 200, and a power booster station (…). Figure 1 The system includes: equipment shown in the two intersecting circles; power transmission lines; energy storage station 300; fuel cell power station 400; water electrolysis hydrogen production station 500; hydrogen storage equipment; industrial water pipelines; industrial water station; common works and auxiliary equipment; and the system control center. Figure 1 (not shown in the image), etc.

[0056] The system comprises 100 units of wind power, 200 units of photovoltaic power, 300 units of energy storage, 500 units of water electrolysis hydrogen production, an industrial water station, and shared engineering and auxiliary equipment. These facilities can be located in deserts, wastelands, or other areas without or with weak power grids. In areas with weak power grids, the shared engineering and auxiliary equipment can utilize a dual-power supply mode, combining external regional power grid supply and internal wind and photovoltaic power supply, to improve power reliability. In areas without power grids, newly constructed low-voltage power lines can supply power to the shared engineering and auxiliary equipment. These low-voltage power lines are connected to the nearby power grid. Since this portion of the load is small, the investment is also lower, and internal wind and photovoltaic power supply is used to further enhance power reliability.

[0057] The industrial water station may include a circulating water station, a desalination water station, and a chilled water station, providing cooling water, raw water, and chilled water for the system. The electrolytic water hydrogen production station 500 produces hydrogen, which can be piped within the plant to a hydrogen storage facility, then compressed and fed into a hydrogen pipeline before reaching hydrogen users within the chemical industrial park. Alternatively, liquid hydrogen can be transported via pipeline if the cost of hydrogen liquefaction technology decreases. Industrial water can be supplied to the wind-solar-storage-hydrogen production plant via external industrial water pipelines.

[0058] The control center of the off-grid wind and solar photovoltaic hydrogen production system can connect to the controllers of wind power station 100, solar power station 200, power booster station, energy storage station 300, fuel cell power station 400, water electrolysis hydrogen production station 500, hydrogen storage equipment, compressors, shared engineering and auxiliary equipment. It is capable of two-way communication and has the ability to monitor equipment operating status and issue control commands. This control center can control the charging or discharging power of energy storage station 300 based on the power generation of wind and solar power, and adjust the hydrogen production conditions of water electrolysis hydrogen production station 500. The large-scale hydrogen storage equipment can dynamically perform storage and release operations, ensuring a stable supply of hydrogen to downstream customers and meeting the needs of continuous chemical production.

[0059] Wind power station 100, photovoltaic power station 200, energy storage station 300 and fuel cell power station 400 can have active frequency support function to detect frequency fluctuations and be equipped with corresponding auxiliary equipment.

[0060] The wind power station 100 may include equipment such as wind turbine generators, wind power converters (AC / DC / AC), and combiner boxes. The photovoltaic power station 200 may include equipment such as photovoltaic arrays, combiner boxes, and photovoltaic inverters (DC / AC). The water electrolysis hydrogen production station 500 may include rectifiers (AC / DC), electrolyzers, gas-liquid separation devices, and gas purification equipment. The gas-liquid separation devices include oxygen / alkali separators and hydrogen / alkali separators, and the gas purification equipment may include oxygen purification equipment and hydrogen purification equipment. The energy storage station 300 may be an electrochemical energy storage station, and the batteries that can be used in the electrochemical energy storage station include lithium-ion batteries, lead-carbon batteries, flow batteries, and other electrochemical batteries.

[0061] The fuel cell power station 400 can utilize technologies including proton exchange membrane fuel cells and solid oxide fuel cells. The fuel cell power station 400 may include gas storage tanks. As one possible implementation, the fuel cell power station 400 can use hydrogen and oxygen generated by the water electrolysis hydrogen production station 500 to generate electricity, and the gas storage tanks may include hydrogen storage tanks and oxygen storage tanks.

[0062] The 500-unit water electrolysis hydrogen production station produces hydrogen and oxygen by decomposing water in an electrolyzer. The hydrogen / alkali mixture passes through a hydrogen / alkali separator; the separated hydrogen then enters a hydrogen purification unit, and after purification, it enters a hydrogen storage tank. The oxygen / alkali mixture passes through an oxygen / alkali separator; the separated oxygen then enters an oxygen purification unit, and after purification, it enters an oxygen storage tank. The alkali separated in both types of gas-liquid separators is re-entered into the electrolyzer via a confluence stream. The feed water is connected to the pipeline before the alkali inlet of the electrolyzer. Both types of gas-liquid separators include heat exchangers; cooling water is used to cool the alkali solution through these heat exchangers.

[0063] like Figures 2-4 As shown, the wind-solar-storage hydrogen production plant in the off-grid wind-solar-hydrogen production system 10 can be located in remote areas such as deserts, wastelands, and wastelands, while the hydrogen users are located in chemical industrial parks. The two can be connected via hydrogen pipelines. In specific engineering embodiments, the layout of the hydrogen storage equipment (i.e., energy storage equipment) can be adjusted according to the pipeline distance. In cases where the pipeline distance is short, such as... Figures 2-3 As shown, hydrogen storage equipment can be placed in chemical industrial parks or wind and solar power hydrogen production and storage plants; in cases where the pipeline distance is long, such as Figure 4 As shown, hydrogen storage equipment needs to be installed on both sides.

[0064] Among them, by Figure 1 It is known that the wind-solar-storage-hydrogen production plant area includes a 100-unit wind power station, a 200-unit photovoltaic power station, a power booster station, transmission lines, a 300-unit energy storage station, a 400-unit fuel cell power station, a 500-unit water electrolysis hydrogen production station, hydrogen storage equipment, an industrial water station, shared engineering and auxiliary equipment, etc.

[0065] Combination Figure 1 , Figure 5 As described above, the off-grid wind-powered photovoltaic hydrogen production system 10 includes a control center and at least one subnet communicatively connected to the control center. Each subnet includes a wind power station 100, a photovoltaic power station 200, an energy storage station 300, a fuel cell power station 400, and a water electrolysis hydrogen production station 500.

[0066] In this embodiment, the wind power station 100 and the photovoltaic power station 200 are used to provide power to their respective subgrids. The energy storage station 300 is used to store electrical energy and provide power to the water electrolysis hydrogen production station 500 in the subgrid. The fuel cell power station 400 is used to provide power to the water electrolysis hydrogen production station 500 in the subgrid. The water electrolysis hydrogen production station 500 is used to produce hydrogen using the power provided by the subgrid. The control center is used to control each of the subgrids to achieve power balance.

[0067] To enable large-scale construction of wind power, photovoltaic power storage, and hydrogen production systems in deserts, wastelands, and other areas without or with weak power grids, it is possible to... Figure 5 As shown, a hydrogen aggregation scheme is used in this region to integrate different wind power, photovoltaic, and hydrogen storage / production modules. Due to the better buffering capacity of hydrogen, mutual interference between electrical equipment in different modules within the off-grid system can be effectively avoided. The wind power, photovoltaic, and hydrogen storage / production modules are independently networked into a medium-voltage AC subgrid, avoiding voltage fluctuations and frequency oscillations caused by the randomness of power generation capacity of different heterogeneous power sources on the same grid. This improves the system's controllability, inertia, and stability margin, and also ensures the normal operation of other system parts when a fault occurs in a single module, reducing safety risks and improving system reliability.

[0068] That is, the off-grid wind-solar photovoltaic hydrogen production system 10 includes multiple sub-grids, and the electrical separation of these sub-grids is achieved. For example... Figure 5 As shown, the off-grid wind power and photovoltaic hydrogen production system 10 may include AC subgrid M1, AC subgrid M2, ..., AC subgrid Mn.

[0069] As described above, the off-grid wind power and photovoltaic hydrogen production system 10 may include an energy storage device (i.e., Figure 5 The hydrogen storage device (in the network) is connected via pipeline to the electrolytic water hydrogen production station 500 in each of the sub-networks. The hydrogen storage device is used to store hydrogen and supply hydrogen to other equipment. Figure 5 As shown, the CCCC AC subnets M1, M2, ..., Mn are connected to the same hydrogen storage device via pipelines to deliver hydrogen to the energy storage device.

[0070] Due to the harsh environment in remote areas during project implementation, it is necessary to insulate critical equipment during winter or at night. In this embodiment, the energy storage station 300, fuel cell power station 400, water electrolysis hydrogen production station 500, industrial water station, shared facilities, and auxiliary equipment are all centrally constructed in one plant, which can improve the convenience of equipment maintenance and reduce operation and maintenance costs. Although the equipment of different wind power and photovoltaic hydrogen storage and production modules is centrally arranged in the plant, the electrical connections of each medium-voltage AC subgrid are relatively independent.

[0071] Please refer to Figure 6 , Figure 6 This is a block diagram of an electronic device 11 provided in an embodiment of this application. The electronic device 11 can be the control center or a part of the control center. The electronic device 11 can be, but is not limited to, a computer, a server, etc. The electronic device 11 can include a memory 111, a processor 112, and a communication unit 113. The memory 111, processor 112, and communication unit 113 are directly or indirectly electrically connected to each other to achieve data transmission or interaction. For example, these components can be electrically connected to each other through one or more communication buses or signal lines.

[0072] The memory 111 is used to store programs or data. The memory 111 may be, but is not limited to, random access memory (RAM), read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), etc.

[0073] The processor 112 is used to read / write data or programs stored in the memory 111 and execute corresponding functions. For example, the memory 111 stores an off-grid wind power and photovoltaic hydrogen production system control device 900, which includes at least one software function module that can be stored in the memory 111 in the form of software or firmware. The processor 112 executes various functional applications and data processing by running the software programs and modules stored in the memory 111, such as the off-grid wind power and photovoltaic hydrogen production system control device 900 in this embodiment, thereby realizing the off-grid wind power and photovoltaic hydrogen production system control method in this embodiment.

[0074] The communication unit 113 is used to establish a communication connection between the electronic device 11 and other communication terminals through the network, and to send and receive data through the network.

[0075] It should be understood that, Figure 6 The structure shown is only a schematic diagram of the electronic device 11. The electronic device 11 may also include components that are larger than... Figure 6 The more or fewer components shown, or having the same Figure 6 The different configurations shown. Figure 6 The components shown can be implemented using hardware, software, or a combination thereof.

[0076] Please refer to Figure 7 , Figure 7 This is a flowchart illustrating the control method for an off-grid wind and solar photovoltaic hydrogen production system provided in this embodiment. The method can be applied to the aforementioned control center. The specific flow of the off-grid wind and solar photovoltaic hydrogen production system control method is described in detail below. In this embodiment, the method may include steps S100 to S300.

[0077] Step S100: For each of the subgrids, obtain the wind power output of the wind power station and the photovoltaic power output of the photovoltaic power station.

[0078] Step S200: Calculate the total power generation based on the wind power and the photovoltaic power.

[0079] Step S300: Based on the total power generation, control the power of at least one of the energy storage station, fuel cell power station, and water electrolysis hydrogen production station to achieve power balance.

[0080] In this embodiment, the control center can obtain the wind power output of the wind power station and the photovoltaic power output of the photovoltaic power station in each subgrid, and then calculate the sum of the wind power output and photovoltaic power output as the total power output of the subgrid. Then, the control center can control the power output of at least one of the energy storage station, fuel cell power station, and water electrolysis hydrogen production station in the subgrid based on the total power output to achieve power balance for the subgrid. In this way, by enabling the energy storage station and the water electrolysis hydrogen production station to track the power output of wind and photovoltaic power for real-time balancing, the frequency regulation and peak shaving requirements for the safe and stable operation of the microgrid system can be met.

[0081] Optionally, the control center can monitor the operating status of equipment within the system, including wind power stations, photovoltaic power stations, energy storage stations, fuel cell power stations, water electrolysis hydrogen production stations, hydrogen storage systems, and compressors. This control center can control the operating power of the water electrolysis hydrogen production station, energy storage station, and fuel cell power station to track the power generation of the wind power station and photovoltaic power station, achieving real-time balance. This tracking method can be expressed as:

[0082] P wind +P pv +P he =P eh +P es

[0083] Among them, P wind P represents the power output of a wind power station (i.e., wind power). pv P represents the power output of a photovoltaic power station (i.e., photovoltaic power). he P represents the power output of a fuel cell power station. eh P represents the power output of the water electrolysis hydrogen production station. es The power rating of the energy storage station is expressed in kilowatts (kW). In the above formula, the power of the energy storage station is positive when charging and negative when discharging.

[0084] Alternatively, as one possible implementation, the rated power P of the energy storage station esr With the rated power P of the fuel cell power stationher The sum of P esr +P her It can be greater than the minimum value in the power adjustment range of the water electrolysis hydrogen production station. For example, if the power adjustment range of the water electrolysis hydrogen production station is [5%P] ehr 120% P ehr ], then we have: P esr +P her >5% P ehr P ehr This indicates the rated power of the water electrolysis hydrogen production station. The energy storage capacity E of the energy storage station... esr It can be equal to P esr *8h.

[0085] Historical weather data from the project's power plant site over a predetermined number of years can be used to calculate and analyze the duration for which the wind and solar power generation capacity is below the minimum value within the power regulation range of the water electrolysis hydrogen production station. Here, wind and solar power generation capacity represents the sum of the power generation capacity of the wind power station and the solar power station. For example, if the power regulation range of the water electrolysis hydrogen production station is [5%P]... ehr 120% P ehr When the annual wind and solar power generation is less than 5%, it can be calculated based on 10 years of historical weather data from the project's power plant site. ehr The duration length data. The theoretical power generation time of the hydrogen and oxygen storage tanks in a fuel cell power plant should be equal to the time length T of the preset fractional part of the above duration length distribution. hs For example, if the preset score is 95%, then setting the capacity of the hydrogen and oxygen storage tanks based on this duration can ensure that the energy storage station and fuel cell power station can avoid shutdown of the water electrolysis hydrogen production station under continuous low power generation or no power generation conditions at 95% wind power.

[0086] The above-described equipment configuration methods for energy storage stations and fuel cells are suitable for wind power and photovoltaic power stations with a large equipment configuration redundancy. When the equipment configuration redundancy of wind power and photovoltaic power stations is small, T can be... hs The median proportion of the duration length distribution, for example, T hs The duration length of the 50th percentile in the above duration length distribution can be selected.

[0087] In this embodiment, to avoid energy loss from regenerating electricity after hydrogen production, the fuel cell power station can only start generating electricity when the wind power station and photovoltaic power station are operating at low or no power generation for extended periods, thereby reducing the number of start-ups and shutdowns of the water electrolysis hydrogen production equipment. When the water electrolysis hydrogen production station shuts down, the following situations arise: the equipment in the water electrolysis hydrogen production station needs to be cooled down, and restarting requires heating, resulting in a slow start-up; the energy consumption for cold starts is high, and no hydrogen is produced or the produced hydrogen is substandard during cold starts; since the water electrolysis hydrogen production equipment is not running, the electricity generated by the wind power station and photovoltaic power station will be wasted; long-term shutdowns require nitrogen protection to prevent air from entering, and restarting requires purging the nitrogen, etc. Through the control described in this embodiment, the occurrence of the above situations can be reduced by decreasing the number of start-ups and shutdowns of the water electrolysis hydrogen production station.

[0088] The off-grid wind-solar photovoltaic hydrogen production system needs to ensure real-time balance between power generation and consumption to guarantee that the frequency, voltage, power quality, and other indicators of the off-grid microgrid meet safety and stability requirements. With the control timescale for frequency, voltage, and power quality indicators of the off-grid system ranging from milliseconds to seconds, the control center of the off-grid system jointly controls the wind power station, photovoltaic power station, electrochemical energy storage, fuel cell power station, and water electrolysis hydrogen production station to implement power balancing, ensuring the stability of system frequency, voltage, and power quality indicators.

[0089] In a large-capacity off-grid wind-power-solar-storage-hydrogen production system, each wind-power-solar-storage-hydrogen production module operates independently, forming a medium-voltage AC subgrid. The control center of the off-grid system issues control commands to different medium-voltage AC subgrids, controlling the electrochemical energy storage, fuel cell power stations, and water electrolysis hydrogen production stations within each subgrid to track the wind power stations and solar power stations within that subgrid, ensuring the stability of the frequency, voltage, power quality, and other indicators of the medium-voltage AC subgrid. The control center of the off-grid system also issues dispatch commands to each medium-voltage AC subgrid to ensure the stability of the frequency, voltage, power quality, and other indicators within each subgrid.

[0090] It is worth noting that when adjusting equipment power, the power can be adjusted within the corresponding equipment's power adjustment range to achieve power balance, ensuring that the system's power consumption remains within the appropriate power adjustment range. For example, suppose the power adjustment range of the water electrolysis hydrogen production station is: [5%P ehr 120% P ehr ], P ehr This indicates the rated power of the water electrolysis hydrogen production station; the power adjustment range of the energy storage station: [-P esr ,+P esr ], P esr This indicates the rated power of the energy storage station; the state of charge (SOC) adjustment range of the energy storage station is [5%, 95%]; the power adjustment range of the fuel power station is [0%P].her 100% P her Correspondingly, when the fuel cell power plant is shut down and the SOC of the energy storage station is within an adjustable range, the power regulation range of the off-grid system load (i.e., the system load power regulation range) is [5%P]. ehr -P esr 120% P ehr +P esr When the SOC of the energy storage station is 5%, the station can only charge or enter standby mode. Therefore, the power regulation range of the electrical load at this time is [5%P]. ehr 120% P ehr +P esr When the SOC of the energy storage station is 95%, the energy storage station can only discharge or enter standby mode. Therefore, the power regulation range of the electrical load at this time is: [5%P] ehr -P esr 120% P ehr ].

[0091] Please refer to Figure 8 , Figure 8 for Figure 7 A flowchart illustrating the sub-steps included in step S300. In this embodiment, step S300 may include sub-steps S310 to S320.

[0092] Sub-step S310: Obtain the first duration of power change based on the total power generation.

[0093] Sub-step S320: Based on the first duration, control the power of at least one of the energy storage station, fuel cell power station, and water electrolysis hydrogen production station.

[0094] The change in total power generation will lead to a power imbalance. In this case, the first duration of the power change can be predicted based on the calculated total power generation and historical data. Then, according to the specific value of this first duration, an appropriate method is used to restore power balance.

[0095] Optionally, the wind power station, photovoltaic power station, energy storage station, and fuel cell power station need to have active frequency support function. When the first duration is less than the first preset duration, the control center may not perform control operation, and at least one device in the wind power station, photovoltaic power station, energy storage station, and fuel cell power station can self-adjust to achieve power balance.

[0096] Optionally, when the first duration is greater than the first preset duration and less than or equal to the second preset duration, the control center can issue control commands to adjust the operating power of the water electrolysis hydrogen production station and / or the energy storage station to balance the total power generation with the power consumption. During this time, the fuel cell power station is in a shutdown state. The first and second preset durations can be set according to actual conditions; for example, the first preset duration can be set to 30 seconds and the second preset duration to 15 minutes.

[0097] Optionally, when the first duration exceeds the second preset duration, a target regulating device among the water electrolysis hydrogen production station, energy storage station, and fuel cell power generation station can be determined based on their respective regulating costs, and the power of the target regulating device can be adjusted. Specifically, the regulating cost of the water electrolysis hydrogen production station is lower than that of the energy storage station, and the regulating cost of the energy storage station is lower than that of the fuel cell power generation station. This achieves power balance while maintaining low cost.

[0098] Off-grid systems exhibit significant volatility and intermittency in wind and solar power generation. The adaptive control requirements within the medium-voltage AC subgrid comprised of wind, solar, and hydrogen storage / production modules are higher, and equipment operating condition adjustments are more frequent. In this system, hydrogen cost < energy storage cost < fuel cell power station cost. Therefore, to adapt to the volatility and intermittency of wind and solar power generation, priority is given to adjusting hydrogen production using the water electrolysis hydrogen production station's operating power, while hydrogen storage equipment buffers fluctuations in gas production. The energy storage station, on the other hand, operates only when its power generation exceeds the load regulation range of the water electrolysis hydrogen production station [5%P]. ehr 120% P ehr After [the initial charge / discharge], charging or discharging operations are performed. Charging occurs when the wind and solar power generation exceeds the upper limit of the load, and discharging occurs when it falls below the lower limit of the load. When the SOC of the energy storage station is 95%, the power generation and consumption balance is maintained through wind and solar power curtailment. When the SOC of the energy storage station is 5%, the fuel cell power station generates electricity to maintain the minimum load of the water electrolysis hydrogen production station, reducing the number of shutdowns. When the fuel cell power station runs out of fuel, both the fuel cell power station and the water electrolysis hydrogen production station shut down. The main function of the fuel cell power station is to utilize the hydrogen in the hydrogen storage tank to extend the low-load safe operation time of the water electrolysis hydrogen production station as much as possible, waiting for the wind and solar power generation to increase, and avoiding shutdown of the water electrolysis hydrogen production station.

[0099] The following section provides a detailed explanation of the adjustment method based on adjustment costs.

[0100] (1) When the total power generation is within the system load power adjustment range of the off-grid wind-power photovoltaic hydrogen production system, the control center adjusts the operating power of the water electrolysis hydrogen production station and / or the energy storage station to balance the total power generation with the power consumption. The fuel cell power station is in a shutdown state. Thus, the control center can ensure that the power generation and consumption balance, frequency, voltage, power quality, and other indicators meet the safe and stable operation requirements of the off-grid microgrid by controlling the operating power of the water electrolysis hydrogen production station and / or the energy storage station.

[0101] (2) When the total power generation of the wind power station and the photovoltaic power station is greater than the maximum value of the system load power adjustment range of the off-grid system, the control center controls the reduction of the power generation of the wind power station and / or the photovoltaic power station in order to ensure the balance of power generation and consumption through power curtailment.

[0102] (3) When the total power generation of the wind power station and the photovoltaic power station is less than the minimum value of the system load power adjustment range of the off-grid system, if the current state of charge of the energy storage station is within the state of charge adjustment range, the control center can control the water electrolysis hydrogen production station to operate at the minimum value of the power adjustment range of the water electrolysis hydrogen production station, and control the energy storage station to provide power. The discharge power of the energy storage station, the operating power of the water electrolysis hydrogen production station, and the total power generation are balanced.

[0103] For example, when the total power generation is less than the minimum value of the off-grid system load power regulation range, and the current SOC of the energy storage station is in the range of [5%, 95%], the control center can issue an instruction to control the water electrolysis hydrogen production station to maintain a minimum operating power of 5%P. ehr And control the energy storage station to generate electricity. The discharge power of the energy storage station is equal to 5%P. ehr -P wind (t)-P pv (t), where P wind (t) represents the power generation of the wind power station at time t, P pv (t) represents the power generation of the photovoltaic power station at time t.

[0104] When the current state of charge (SOC) of the energy storage station is lower than the preset SOC, the fuel cell power station is activated to provide electrical energy. The preset SOC is within the SOC adjustment range, and its specific value can be set according to actual needs. The power generation capacity of the fuel cell power station, the operating power of the water electrolysis hydrogen production station, and the total power generation capacity are balanced.

[0105] Optionally, to further ensure the continued operation of the water electrolysis hydrogen production station, when the current state of charge is lower than the preset state of charge, a second duration for which the total power generation of the wind power station and the photovoltaic power station is lower than the preset total power generation can be predicted. Here, "low power generation" refers to power generation below the preset total power generation, and the specific value of the preset total power generation can be set according to actual needs.

[0106] If the second duration is not greater than the third preset duration, the energy storage station can continue to provide power for the water electrolysis hydrogen production, allowing the water electrolysis hydrogen production to maintain its minimum operating frequency. If the second duration is greater than the third preset duration, the fuel cell power station can be started. The third preset duration is the duration for which the energy storage station can continue to operate the water electrolysis hydrogen production station. Thus, by starting the fuel cell power station in advance, the shutdown of the water electrolysis hydrogen production station is avoided if the energy storage station cannot provide power and the fuel cell power station is not fully operational.

[0107] For example, when the SOC of an energy storage station is less than or equal to 10%, the control center can determine the third duration of low power generation greater than T by predicting power generation. s When the fuel cell power station is started, its power generation capacity is equal to 5% of P. ehr Meanwhile, the energy storage station enters standby mode.

[0108] (4) When the fuel storage capacity of the fuel cell power station is at a preset level, the control center can shut down the water electrolysis hydrogen production station. The preset level can be set according to actual needs, for example, 5% of the storage tank capacity.

[0109] When the water electrolysis hydrogen production station is shut down and the wind power station and photovoltaic power station are operating at low power, the electricity generated by the wind power station and photovoltaic power station is used to charge the energy storage station. At this time, if the total power generation exceeds the rated power of the energy storage station, the excess power can be discarded. When the state of charge (SOC) of the energy storage station reaches the maximum value of its SOC adjustment range, the energy storage station is shut down. For example, if the energy storage station continues charging, it can be shut down when its SOC reaches 95%.

[0110] When the total power generation of the wind power station and the photovoltaic power station exceeds the preset power within the power adjustment range of the water electrolysis hydrogen production station, a third duration for which the total power generation exceeds the preset power is predicted; when the third duration exceeds the preset start-up duration, the water electrolysis hydrogen production station is started. The preset start-up duration can be set according to the start-up duration of the water electrolysis hydrogen production station.

[0111] For example, when the total power generation is greater than 5%Pehr If it is predicted that the continuous power generation time is longer than the start-up time of the water electrolysis hydrogen production station, the water electrolysis hydrogen production station can be controlled to start a cold start operation and start the electrical equipment in the water electrolysis hydrogen production station.

[0112] (5) If the total power generation of the wind power station and the photovoltaic power station increases, and the energy storage station is in a discharge state, the control center can increase the operating power of the water electrolysis hydrogen production station and reduce the power generation of the energy storage station to ensure a balance between power generation and electricity consumption.

[0113] If the fuel cell power station is in power generation mode, the control center can reduce the power output of the fuel cell power station. If the power output of the fuel cell power station drops to zero and the total power output continues to increase, the control center can increase the operating power of the water electrolysis hydrogen production station. Furthermore, when the total power output exceeds the maximum value within the power adjustment range of the water electrolysis hydrogen production station, the control center can charge the energy storage station. For example, when the total power output exceeds 120% of the power output... ehr At that time, the energy storage station begins charging.

[0114] When the fuel cell power station and the water electrolysis hydrogen production station are shut down, and the wind power station and the photovoltaic power station are operating at low power output, the energy storage station can be charged. Excess power generated when the total power output exceeds the rated power of the energy storage station is discarded. The energy storage station shuts down when its state of charge reaches the maximum value of its adjustable range. When the total high power output of the wind power station and the photovoltaic power station exceeds the preset power output within the power adjustment range of the water electrolysis hydrogen production station, and the control center predicts that this continuous power generation time will exceed the preset start-up time, the water electrolysis hydrogen production station can begin a cold start operation to start the electrical equipment.

[0115] For example, when both the fuel cell power plant and the water electrolysis hydrogen production plant are shut down, and the total power generation is at a low-to-high power output, the wind power plant and photovoltaic power plant can be controlled to charge the energy storage station. Under this condition, excess electricity exceeding the rated power of the energy storage station is discarded until the energy storage station's SOC reaches 95%, at which point the energy storage station is shut down. When the total power generation exceeds 5% of P... ehr Furthermore, based on the power generation prediction of the control center, when the continuous power generation time exceeds the start-up time of the water electrolysis hydrogen production station, the water electrolysis hydrogen production station will begin a cold start operation and start the electrical equipment.

[0116] In this embodiment, the off-grid wind-powered photovoltaic energy storage and hydrogen production modules are integrated via hydrogen pipelines. The electrical equipment in each medium-voltage AC subgrid is independent, and the independent operation of multiple microgrids reduces the global power supply reliability issues caused by localized faults. The large-capacity off-grid wind-powered photovoltaic energy storage and hydrogen production system can be connected to hydrogen pipelines via off-grid wind-powered photovoltaic energy storage and hydrogen production modules, offering good system scalability. The above system primarily utilizes the charging and discharging of the energy storage station to provide power regulation services. If the cost of pumped hydro storage, compressed air storage, and other energy storage methods is sufficiently low, power regulation within the system can also be achieved through other types of energy storage devices to provide power generation and load balancing, thus achieving the goal of safe and stable system operation.

[0117] To perform the corresponding steps in the above embodiments and various possible methods, an implementation of an off-grid wind power photovoltaic hydrogen production system control device 900 is given below. Optionally, the off-grid wind power photovoltaic hydrogen production system control device 900 can adopt the above-described... Figure 6 The device structure of the electronic device 11 shown. Further, please refer to... Figure 9 , Figure 9 This is a block diagram of the off-grid wind power and photovoltaic hydrogen production system control device 900 provided in this embodiment. It should be noted that the basic principle and technical effects of the off-grid wind power and photovoltaic hydrogen production system control device 900 provided in this embodiment are the same as those in the above embodiments. For the sake of brevity, any parts not mentioned in this embodiment can be referred to the corresponding content in the above embodiments.

[0118] In this embodiment, the off-grid wind-power photovoltaic hydrogen production system control device 900 can be applied to the control center of an off-grid wind-power photovoltaic hydrogen production system. The off-grid wind-power photovoltaic hydrogen production system includes at least one sub-network communicatively connected to the control center. The sub-network includes a wind power station, a photovoltaic power station, an energy storage station, a fuel cell power station, and a water electrolysis hydrogen production station. When multiple sub-networks are included, they are electrically isolated. The off-grid wind-power photovoltaic hydrogen production system control device 900 may include an information acquisition module 910 and a control module 920.

[0119] The information acquisition module 910 is used to obtain the wind power output of the wind power station and the photovoltaic power output of the photovoltaic power station for each of the sub-networks.

[0120] The control module 920 is used to calculate the total power generation based on the wind power and the photovoltaic power.

[0121] The control module 920 is also used to control the power of at least one of the energy storage station, fuel cell power station and water electrolysis hydrogen production station according to the total power generation, so as to achieve power balance.

[0122] Optionally, the above modules can be stored in the form of software or firmware. Figure 6 The memory 111 shown is either stored in or embedded in the operating system (OS) of the electronic device 11, and can be used by... Figure 6 The processor 112 in the memory executes the program. Meanwhile, the data and program code required to execute the above modules can be stored in the memory 111.

[0123] This application also provides a readable storage medium storing a computer program thereon, which, when executed by a processor, implements the off-grid wind power photovoltaic hydrogen production system control method.

[0124] In summary, the embodiments of this application provide a readable storage medium, an electronic device, an off-grid wind-powered photovoltaic hydrogen production system, and a control method thereof. The off-grid wind-powered photovoltaic hydrogen production system includes a control center and at least one subnet communicatively connected to the control center. Each subnet includes a wind power station, a photovoltaic power station, an energy storage station, a fuel cell power station, and a water electrolysis hydrogen production station. When multiple subnets exist, the electrical separation of the multiple subnets is achieved. For each subnet, the control center obtains the wind power and photovoltaic power generated by the wind power station and the photovoltaic power generated by the photovoltaic power station in that subnet, and calculates the total power generation based on the wind power and photovoltaic power. Then, based on the total power generation, the power of at least one of the energy storage station, fuel cell power station, and water electrolysis hydrogen production station is controlled to achieve power balance. In this way, the control center can track the power generation of wind power stations and photovoltaic power stations by controlling energy storage stations, fuel cell power stations and water electrolysis hydrogen production stations to achieve real-time balance. At the same time, this method is easy to control, reduces the complexity of the system's communication network and improves scalability. Furthermore, each subgrid is electrically independent, and the independent operation of multiple microgrids can reduce global power supply reliability issues caused by local failures.

[0125] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0126] In addition, the functional modules in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0127] If the aforementioned functions are implemented as software functional modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0128] The above description is merely an optional embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A control method for an off-grid wind-powered photovoltaic hydrogen production system, characterized in that, A control center is applied to an off-grid wind and solar photovoltaic hydrogen production system. The off-grid wind and solar photovoltaic hydrogen production system includes at least one subnetwork communicatively connected to the control center. The subnetwork includes a wind power station, a solar power station, an energy storage station, a fuel cell power station, and a water electrolysis hydrogen production station. When multiple subnetworks are included, the electrical isolation of the multiple subnetworks is provided. The method includes: For each of the subgrids, obtain the wind power output of the wind power station and the photovoltaic power output of the photovoltaic power station. The total power generation is calculated based on the wind power and the photovoltaic power. Based on the total power generation, the power of at least one of the energy storage station, fuel cell power station, and water electrolysis hydrogen production station is controlled to achieve power balance; The step of controlling the power of at least one of the energy storage station, fuel cell power station, and water electrolysis hydrogen production station based on the total power generation to achieve power balance includes: The first duration of power change is predicted based on the total power generation and historical data. Based on the first duration, the power of at least one of the energy storage station, fuel cell power station, and water electrolysis hydrogen production station is controlled.

2. The method according to claim 1, characterized in that, The step of controlling the power of at least one of the energy storage station, fuel cell power station, and water electrolysis hydrogen production station according to the first duration includes: When the first duration is greater than the first preset duration and less than or equal to the second preset duration, the operating power of the water electrolysis hydrogen production station and / or the energy storage station is adjusted to balance the total power generation and power consumption, wherein the fuel cell power station is in a shutdown state.

3. The method according to claim 1 or 2, characterized in that, The step of controlling the power of at least one of the energy storage station, fuel cell power station, and water electrolysis hydrogen production station according to the first duration includes: When the first duration is longer than the second preset duration, the target regulating device among the water electrolysis hydrogen production station, the energy storage station, and the fuel cell power station is determined based on their respective regulating costs, and the power of the target regulating device is adjusted. The regulating cost of the water electrolysis hydrogen production station is lower than that of the energy storage station, and the regulating cost of the energy storage station is lower than that of the fuel cell power station.

4. The method according to claim 3, characterized in that, When the first duration is longer than the second preset duration, based on the respective adjustment costs of the water electrolysis hydrogen production station, the energy storage station, and the fuel cell power station, a target adjustment device among the water electrolysis hydrogen production station, the energy storage station, and the fuel cell power station is determined, and the power of the target adjustment device is adjusted, including: When the total power generation is within the system load power adjustment range of the off-grid wind power photovoltaic hydrogen production system, the operating power of the water electrolysis hydrogen production station and / or the energy storage station is adjusted to balance the total power generation with the power consumption, wherein the fuel cell power station is in a shutdown state; When the total power generation exceeds the maximum value of the system load power adjustment range of the off-grid wind-powered photovoltaic hydrogen production system, the power generation of the wind power station and / or the photovoltaic power station shall be reduced.

5. The method according to claim 4, characterized in that, When the first duration is longer than the second preset duration, the method of determining the target regulating device among the water electrolysis hydrogen production station, the energy storage station, and the fuel cell power station based on their respective regulation costs, and adjusting the power of the target regulating device, further includes: When the total power generation is less than the minimum value of the system load power adjustment range of the off-grid wind power photovoltaic hydrogen production system, and the current state of charge of the energy storage station is within the state of charge adjustment range, the water electrolysis hydrogen production station is controlled to operate at the minimum value of the power adjustment range of the water electrolysis hydrogen production station, and the energy storage station is controlled to provide power, wherein the discharge power of the energy storage station, the operating power of the water electrolysis hydrogen production station and the total power generation are balanced; When the current state of charge of the energy storage station is lower than the preset state of charge, the fuel cell power station is started to provide power. The preset state of charge is within the state of charge adjustment range, and the power generation of the fuel cell power station, the operating power of the water electrolysis hydrogen production station, and the total power generation are balanced.

6. The method according to claim 5, characterized in that, When the current state of charge of the energy storage station is lower than a preset state of charge, starting the fuel cell power station to provide electrical energy includes: When the current state of charge is lower than the preset state of charge, a second duration for which the total power generation is lower than the preset total power generation is predicted; When the second duration exceeds the third preset duration, the fuel cell power station is started, wherein the third preset duration is the duration during which the energy storage station can continue to operate the water electrolysis hydrogen production station.

7. The method according to claim 6, characterized in that, When the first duration is longer than the second preset duration, the method of determining the target regulating device among the water electrolysis hydrogen production station, the energy storage station, and the fuel cell power station based on their respective regulation costs, and adjusting the power of the target regulating device, further includes: When the fuel storage of the fuel cell power station is at a preset level, the water electrolysis hydrogen production station is shut down. When the water electrolysis hydrogen production station is shut down and the wind power station and the photovoltaic power station are operating at low power, the electricity generated by the wind power station and the photovoltaic power station is used to charge the energy storage station until the state of charge of the energy storage station reaches the maximum value of the state of charge adjustment range of the energy storage station, at which point the energy storage station is shut down. Wherein, when the total power generation is lower than the preset total power generation, the wind power station and the photovoltaic power station are operating at low power. When the total power generation of the wind power station and the photovoltaic power station is greater than the preset power within the power regulation range of the water electrolysis hydrogen production station, a third duration for which the total power generation is greater than the preset power is predicted. When the third duration exceeds the preset start-up duration, the water electrolysis hydrogen production station is started.

8. The method according to claim 4, characterized in that, When the first duration is longer than the second preset duration, the method of determining the target regulating device among the water electrolysis hydrogen production station, the energy storage station, and the fuel cell power station based on their respective regulation costs, and adjusting the power of the target regulating device, further includes: If the total power generation of the wind power station and the photovoltaic power station increases, and the energy storage station is in a discharge state, then the operating power of the water electrolysis hydrogen production station will be increased, and the power generation of the energy storage station will be reduced. If the fuel cell power station is in power generation mode, the power generation capacity of the fuel cell power station is reduced. If the power generation capacity of the fuel cell power station is reduced to 0 and the total power generation capacity continues to increase, the operating power of the water electrolysis hydrogen production station is increased. When the total power generation capacity is greater than the maximum value within the power adjustment range of the water electrolysis hydrogen production station, the energy storage station is charged.

9. An off-grid wind-powered photovoltaic hydrogen production system, characterized in that, The system includes a control center and at least one subnet communicatively connected to the control center. The subnet includes a wind power station, a photovoltaic power station, an energy storage station, a fuel cell power station, and a water electrolysis hydrogen production station. When multiple subnets are included, they are electrically isolated. The wind power station and the photovoltaic power station are used to provide power to the subgrid; The energy storage station is used to store electrical energy and provide electrical energy to the water electrolysis hydrogen production station in the subgrid. The fuel cell power station is used to provide power to the water electrolysis hydrogen production station in the subgrid; The water electrolysis hydrogen production station is used to produce hydrogen using the electrical energy provided by the subgrid. The control center is used to control each of the subnets using the method described in any one of claims 1-8 to achieve power balance.

10. The system according to claim 9, characterized in that, The sum of the rated power of the energy storage station and the rated power of the fuel cell power station is greater than the minimum value in the power adjustment range of the water electrolysis hydrogen production station, and / or, The fuel cell power station uses hydrogen and oxygen generated by the water electrolysis hydrogen production station to generate electricity. The fuel cell power station includes hydrogen storage tanks and oxygen storage tanks. The capacity of the hydrogen storage tanks and oxygen storage tanks is determined based on the duration for which the wind and solar power generation power in the subgrid's region is lower than the minimum value in the power adjustment range of the water electrolysis hydrogen production station for a preset number of years.

11. The system according to claim 10, characterized in that, The system also includes hydrogen storage equipment. The hydrogen storage device is connected to the water electrolysis hydrogen production station in each of the sub-networks via pipelines. The hydrogen storage device is used to store hydrogen and supply hydrogen to other devices.

12. A control device for an off-grid wind power-photovoltaic hydrogen production system, characterized in that, A control center is applied to an off-grid wind and solar photovoltaic hydrogen production system. The off-grid wind and solar photovoltaic hydrogen production system includes at least one subnetwork communicatively connected to the control center. The subnetwork includes a wind power station, a solar power station, an energy storage station, a fuel cell power station, and a water electrolysis hydrogen production station. When multiple subnetworks are included, the multiple subnetworks are electrically isolated. The device includes: The information acquisition module is used to obtain the wind power output of the wind power station and the photovoltaic power output of the photovoltaic power station for each of the sub-networks. The control module is used to calculate the total power generation based on the wind power and the photovoltaic power. The control module is also used to control the power of at least one of the energy storage station, fuel cell power station and water electrolysis hydrogen production station according to the total power generation, so as to achieve power balance; Specifically, the control module is used to: predict a first duration of power change based on the total power generation and historical data; and control the power of at least one of the energy storage station, fuel cell power station, and water electrolysis hydrogen production station based on the first duration.

13. An electronic device, characterized in that, The system includes a processor and a memory, the memory storing machine-executable instructions that can be executed by the processor, the processor executing the machine-executable instructions to implement the off-grid wind power photovoltaic hydrogen production system control method according to any one of claims 1-8.

14. A readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the control method for an off-grid wind power and photovoltaic hydrogen production system as described in any one of claims 1-8.

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