Efficient wind-light-hydrogen storage and combustion integrated energy supply system and operation method thereof

Abstract

The invention provides an efficient wind-light-hydrogen storage and combustion integrated energy supply system and an operation method thereof, and relates to the technical field of new energy power generation and comprehensive utilization, and the system comprises a wind-light power generation and energy storage module, a hydrogen and oxygen production module, a hydrogen energy power generation module, a waste heat utilization module, a cold and heat storage module and an operation control module; the operation control module controls energy storage charging and discharging and power grid dispatching by monitoring the deviation between the wind-solar power generation power and the hydrogen production power in real time; based on cooling and heating loads of a hydrogen production process, the hydrogen energy power generation module is dynamically started and stopped to recover high-temperature waste heat, gradient utilization of refrigeration and heat supply is achieved, and energy storage and release are conducted in cooperation with the cold and heat storage module; and according to seasonal load characteristics, a priority sequence of multi-supply energy is set to optimize the energy efficiency and economy of the system. The system has the technical effects of stabilizing wind and light power generation output, improving the comprehensive utilization efficiency of energy, enhancing the adaptability of the system to load fluctuation and optimizing the overall energy efficiency and economical efficiency of the system.

Description

Technical Field

[0001] This application relates to the field of new energy power generation and comprehensive utilization technology, and in particular to a high-efficiency integrated wind, solar, hydrogen storage and fuel energy supply system and its operation method. Background Technology

[0002] Renewable energy sources such as wind and solar power have become key to building new power systems. However, their inherent intermittency and volatility result in highly random and uncontrollable power generation output, which not only causes serious wind and solar curtailment problems, but also requires reliance on grid peak shaving or backup power sources to maintain power supply continuity, significantly increasing system operating costs and scheduling difficulties.

[0003] Hydrogen energy, as a clean energy storage medium with high energy density, can convert surplus wind and solar power into hydrogen energy through water electrolysis, enabling energy regulation and allocation across time scales and regions. However, integrated wind-solar-hydrogen storage and combustion systems in related technologies still have significant shortcomings: the system architecture is mostly limited to a single-stage coupling of "power generation-hydrogen production," failing to achieve closed-loop integration of hydrogen power generation, waste heat recovery, and terminal heating and cooling loads; the utilization of hydrogen energy is singular, focusing on fuel cell power generation, failing to fully explore the high-efficiency power generation potential of gas turbine-steam turbine combined cycle, and generally neglecting the resource utilization of oxygen produced as a byproduct of hydrogen production; In addition, the coordination among the various energy units within the system is insufficient, and the cold and heat storage devices are disconnected from the main wind, solar and hydrogen system, making it difficult to effectively participate in peak shaving during peak electricity and energy consumption periods. This results in low overall energy utilization efficiency. At the same time, the utilization rate of waste heat from the high-temperature flue gas emitted by the gas turbine is insufficient, causing a large amount of high-grade heat energy to be wasted. Summary of the Invention

[0004] This application provides a high-efficiency integrated wind, solar, hydrogen, energy storage and combustion power supply system and its operation method, which can solve the problems of unstable wind and solar power output, low energy utilization efficiency, weak ability to cope with load fluctuations and poor system economy caused by the lack of multi-energy module collaborative control mechanism, inability to effectively recover waste heat from hydrogen power generation, and difficulty in optimizing energy supply strategy according to load characteristics in related technologies.

[0005] According to a first aspect of this application, a high-efficiency integrated wind, solar, hydrogen storage, and fuel gas energy supply system is provided, comprising: Wind and solar power generation and energy storage modules, hydrogen and oxygen production modules, hydrogen power generation modules, waste heat utilization modules, cold and heat storage modules, and operation control modules; The operation control module is configured as follows: The system monitors the output power of the wind and solar power generation and energy storage modules and the hydrogen production power of the hydrogen and oxygen production modules in real time. Based on the power deviation value, it controls the charging and discharging process of the electrochemical energy storage module and schedules the transmission or extraction of electrical energy to the grid. Based on the process cold load and heat load data of the hydrogen and oxygen production module, the operating status of the hydrogen power generation module is dynamically adjusted. Through start-stop control, the waste heat utilization module recovers the high-temperature waste heat generated by hydrogen power generation, realizing the cascade utilization of cooling and heating, and simultaneously operating the cold and heat storage module to store or release cold and heat energy. Based on seasonal external load characteristics, the operating priority sequence of waste heat utilization module, cold and heat storage module and electric refrigeration unit is set, and the energy supply is switched when the load fluctuates to optimize the overall energy efficiency and economy of the system.

[0006] Optionally, when the power generation of the wind and solar power generation and energy storage modules is greater than the hydrogen production power of the hydrogen and oxygen production modules, the operating control module controls the electrochemical energy storage module to enter the charging mode and feeds the remaining electrical energy into the grid through the step-up substation.

[0007] Optionally, during the cooling season, when the operation control module detects that the sum of the process cooling load and the cooling load of the hydrogen production station cooling system is lower than the cooling capacity of the cold and heat storage module, the cold and heat storage module will provide independent cooling; when the sum of the process cooling load and the cooling load of the hydrogen production station cooling system is higher than the cooling capacity of the cold and heat storage module, the electric cooling device will be started to provide cooling, and the electric cooling device will be used only for cooling after the cooling capacity of the cold and heat storage module is exhausted. During the heating season, the operation control module utilizes the cold and heat storage modules to provide heat and starts the electric refrigeration unit to provide cooling for the process cooling load. When the operation control module is running during the transition season, if it detects that the process cooling load is lower than the cooling capacity of the cold and heat storage module, it will only use the cold and heat storage module for cooling; if the process cooling load is higher than the cooling capacity of the cold and heat storage module, it will start the electric cooling device for cooling, and after the cooling capacity of the cold and heat storage module is exhausted, it will only use the electric cooling device for cooling.

[0008] Optionally, when the power generation of the wind and solar power generation and energy storage modules is less than the hydrogen production power of the hydrogen and oxygen production modules, the operation control module controls the electrochemical energy storage module to enter the discharge mode, and at the same time starts the hydrogen power generation module to perform peak power generation.

[0009] Optionally, during the cooling season, when the operation control module detects that the sum of the process cooling load and the cooling load of the hydrogen production station cooling system is lower than the cooling capacity of the waste heat utilization module, the waste heat utilization module will independently supply cooling and store the remaining cooling capacity in the cold and heat storage module; when the sum of the process cooling load and the cooling load of the hydrogen production station cooling system is higher than the cooling capacity of the waste heat utilization module, the cold and heat storage module will be controlled to release the cooling capacity, and the electric refrigeration device will be started to supplement the cooling capacity after the cooling capacity is exhausted. During the heating season, when the operation control module detects that the heat load of the hydrogen production station's heating system is lower than the heating capacity of the waste heat utilization module, the waste heat utilization module will provide heat and store the remaining heat in the cold and heat storage module; when the heat load of the hydrogen production station's heating system is higher than the heating capacity of the waste heat utilization module, the module will control the waste heat utilization module and the cold and heat storage module to provide heat together; and the waste heat utilization module will work in conjunction with the electric chiller to provide cooling. When the operation control module is running during the transition season, if it detects that the process cooling load is lower than the cooling capacity of the waste heat utilization module, the waste heat utilization module will prioritize cooling and store the remaining cooling capacity in the cold and heat storage module; when the process cooling load is higher than the cooling capacity of the waste heat utilization module, the cold and heat storage module will be controlled to release the cooling capacity, and the electric refrigeration unit will be started to supplement the cooling after the cooling capacity is exhausted.

[0010] Optionally, the remaining capacity of the electrochemical energy storage module is monitored. When the remaining capacity is lower than a preset minimum threshold, the discharge circuit of the electrochemical energy storage module is blocked and the system is switched to purchase power from the grid to ensure continuous operation of the system.

[0011] According to a second aspect of this application, an operation method for an integrated wind-solar-hydrogen storage and combustion energy supply system is provided, comprising: Monitor and compare the power generation of the wind and solar power generation and energy storage modules with the hydrogen production power of the hydrogen and oxygen production modules, and dynamically switch the system operation mode based on the comparison results; Based on the operating mode and the seasonal load characteristics of the cooling season, heating season, and transition season, the operation control module executes preset cooling and heating strategies to coordinate the start-up and shutdown of multiple devices and energy storage and utilization.

[0012] Optionally, monitor and compare the power generation of the wind and solar power generation and energy storage modules with the hydrogen production power of the hydrogen and oxygen production modules; When the power generation capacity is greater than the hydrogen production capacity, the operation mode will be switched to pure hydrogen non-power generation operation and energy supply mode. The pure hydrogen non-power generation operation and energy supply mode includes controlling the electrochemical energy storage module to enter the charging mode and feeding the remaining electrical energy into the grid through the step-up substation. When the power generation is less than the hydrogen production, the operation mode will be switched to the pure hydrogen combined power generation operation mode. The pure hydrogen combined power generation operation mode includes controlling the electrochemical energy storage module to enter the discharge mode, and at the same time starting the hydrogen power generation module to perform peak power generation.

[0013] Optionally, in the pure hydrogen non-power generation operation mode: During the cooling season, if the sum of the process cooling load and the cooling load of the hydrogen production station cooling system is lower than the cooling capacity of the cold and heat storage module, the cold and heat storage module will provide cooling independently; if the sum of the process cooling load and the cooling load of the hydrogen production station cooling system is higher than the cooling capacity of the cold and heat storage module, the electric cooling device will be started for cooling, and the electric cooling device will be used for cooling only after the cooling capacity of the cold and heat storage module is exhausted. During the heating season, heat storage modules are used for heating, and electric refrigeration units are started to provide cooling for process loads. During the transitional season, if the process cooling load is lower than the cooling capacity of the cold and heat storage modules, only the cold and heat storage modules are used for cooling; if the process cooling load is higher than the cooling capacity of the cold and heat storage modules, the electric refrigeration unit is started for cooling, and only the electric refrigeration unit is used for cooling after the cooling capacity of the cold and heat storage modules is exhausted.

[0014] Optionally, in the pure hydrogen combined power generation operation mode: During the cooling season, if the sum of the process cooling load and the cooling load of the hydrogen production station cooling system is lower than the cooling capacity of the waste heat utilization module, the waste heat utilization module will provide cooling independently and store the remaining cooling capacity in the cold and heat storage module; if the sum of the process cooling load and the cooling load of the hydrogen production station cooling system is higher than the cooling capacity of the waste heat utilization module, the cold and heat storage module will be controlled to release the cooling capacity, and the electric cooling device will be started to supplement the cooling after the cooling capacity is exhausted. During the heating season, if the heat load of the hydrogen production station's heating system is lower than the heating capacity of the waste heat utilization module, the waste heat utilization module will provide heat and store the remaining heat in the cold and heat storage module; if the heat load of the hydrogen production station's heating system is higher than the heating capacity of the waste heat utilization module, the waste heat utilization module and the cold and heat storage module will be controlled to provide heat together; and the waste heat utilization module will be used in conjunction with the electric chiller for cooling. During the transition season, if the process cooling load is lower than the cooling capacity of the waste heat utilization module, the waste heat utilization module will prioritize cooling and store the remaining cooling capacity in the cold and heat storage module; if the process cooling load is higher than the cooling capacity of the waste heat utilization module, the cold and heat storage module will release the cooling capacity, and the electric refrigeration unit will be started to supplement the cooling after the cooling capacity is exhausted.

[0015] This application provides a high-efficiency integrated wind, solar, hydrogen, storage, and combustion energy supply system and its operation method, comprising: an operation control module, a power generation and energy storage subsystem, a hydrogen and oxygen production subsystem, a pure hydrogen combined power generation and combustion system, and a steam waste heat cooling and heating subsystem; the operation control module is communicatively connected to the power generation and energy storage subsystem, the hydrogen and oxygen production subsystem, the pure hydrogen combined power generation and combustion system, and the steam waste heat cooling and heating subsystem, respectively, for real-time monitoring of the operating parameters, load demand, and energy status of each subsystem, dynamically switching the system operation mode, coordinating the start-up and shutdown priorities of multiple devices, and executing preset threshold judgments and optimized control strategies; the power generation and energy storage subsystem is connected to the hydrogen and oxygen production subsystem, for collecting wind and solar energy and converting it into electrical energy to provide clean green electricity for the hydrogen and oxygen production subsystem, while storing excess electrical energy generated by wind and solar power generation, and feeding excess electrical energy exceeding the storage capacity into the grid; the hydrogen and oxygen production subsystem is connected to the pure hydrogen combined power generation and combustion system... The combined power generation and energy storage system is connected to convert the green electricity provided by the power generation and energy storage subsystem into hydrogen and oxygen. The generated hydrogen and oxygen are separated, purified, cooled, and stored, while fuel hydrogen that meets combustion requirements is supplied to the pure hydrogen combined power generation and energy storage system. The pure hydrogen combined power generation and energy storage system is connected to the steam waste heat cooling and heating subsystem to use the hydrogen supplied by the hydrogen and oxygen production subsystem as fuel to generate electricity through a combined cycle of gas turbine and steam turbine to achieve system peak shaving and provide stable rotational inertia. The high-temperature waste heat generated during the power generation process is recovered to provide a heat source for the steam waste heat cooling and heating subsystem. The steam waste heat cooling and heating subsystem is connected to the hydrogen and oxygen production subsystem to recover the waste heat of the pure hydrogen combined power generation and energy storage system. Combined with refrigeration and heating equipment, it operates in stages for the cooling season, heating season, and transition season to meet the process cooling needs of the hydrogen production station and the building cooling needs in summer and the building heating needs in winter. This application constructs a highly efficient integrated wind-solar-hydrogen-storage-fuel energy supply system comprising wind and solar power generation and storage modules, hydrogen and oxygen production modules, hydrogen power generation modules, waste heat utilization modules, cold and heat storage modules, and an operation control module. The operation control module can monitor the output power of the wind and solar power generation and storage modules and the hydrogen production power of the hydrogen and oxygen production modules in real time to control charging and discharging and power dispatch. Based on the cold and heat load data of the hydrogen and oxygen production modules, it dynamically adjusts the operating status of the hydrogen power generation module and realizes cascade utilization of waste heat and cold and heat storage operations. Simultaneously, it sets the operating priority sequence of relevant modules according to seasonal external load characteristics to switch energy supply during load fluctuations. Therefore, it can solve the problems of unstable wind and solar output, low energy utilization efficiency, weak ability to cope with load fluctuations, and poor system economy caused by the lack of a multi-energy module collaborative control mechanism, the inability to effectively recover waste heat from hydrogen power generation, and the difficulty in optimizing energy supply strategies according to load characteristics in related technologies. This achieves the technical effects of stabilizing wind and solar power output, improving comprehensive energy utilization efficiency, enhancing the system's adaptability to load fluctuations, and optimizing the overall energy efficiency and economy of the system.

[0016] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description

[0017] To more clearly illustrate the embodiments of this application, the accompanying 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.

[0018] Figure 1 This is a schematic diagram of the structure of an integrated wind, solar, hydrogen, and fuel storage energy supply system provided in an embodiment of this application; Figure 2 This is a schematic diagram of another high-efficiency integrated wind, solar, hydrogen storage and combustion energy supply system provided in the embodiments of this application; Figure 3 A flowchart illustrating the operation method of an integrated wind, solar, hydrogen, and fuel storage energy supply system provided in this application embodiment; Figure 4 This is a flowchart illustrating the operation method of another high-efficiency integrated wind, solar, hydrogen, and fuel storage energy supply system provided in this application embodiment.

[0019] In the diagram: 1. Wind power generation unit; 2. Photovoltaic power generation unit; 3. Wind-solar booster station; 4. Electrochemical energy storage unit; 5. Power grid; 6. Transformer group of hydrogen production station; 7. Rectifier; 8. Electrolyzer; 9. Oxygen separator; 10. Oxygen scrubber; 11. Oxygen cooler; 12. Oxygen storage tank; 13. Hydrogen separator; 14. Hydrogen scrubber; 15. Hydrogen cooler; 16. Hydrogen purification system; 17. Hydrogen compression system; 18. Hydrogen storage tank; 19. Hydrogen filling station; 20. Hydrogen pressure regulating station; 21. Air compressor; 22. Combustion chamber; 23. Gas turbine; 24. Steam, hot water, and waste heat boiler; 25. Steam turbine; 26. Heating system of hydrogen production station; 27. Steam-type lithium bromide unit; 28. Cold and heat storage tank; 29. ​​Electric refrigeration unit; 30. Cooling tower; 31. Hydrogen production. Station cooling system; F-1, heating water distributor; F-2, chilled water supply water distributor; F-3, chilled water return water distributor; H-1, chilled water supply manifold; H-2, chilled water return manifold; P-1, heating water supply pump 1; P-2, heating water supply pump 2; P-3, heating water return pump; P-4, chilled water supply pump 1; P-5, chilled water storage pump; P-6, chilled water supply pump 2; P-7, chilled water supply pump 3; P-8, chilled water return pump 1; P-9, chilled water return pump 2; P-10, circulating cooling water supply pump; P-11, circulating cooling water return pump; a, electric valve a; b, electric valve b; c, electric valve c; d, electric valve d; e, electric valve e; f, electric valve f; g, electric valve g; h, electric valve h; i, electric valve i; j, electric valve j. Detailed Implementation

[0020] The following description, in conjunction with the accompanying drawings, illustrates exemplary embodiments of this application, including various details to aid understanding. These should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0021] The following description, with reference to the accompanying drawings, illustrates an efficient integrated wind, solar, hydrogen, and fuel storage energy supply system and its operation method, according to embodiments of this application.

[0022] Figure 1 This is a schematic diagram of the structure of an integrated wind, solar, hydrogen, and fuel storage energy supply system provided in an embodiment of this application, as shown below. Figure 1 As shown, the system includes: a wind and solar power generation and energy storage module, a hydrogen and oxygen production module, a hydrogen power generation module, a waste heat utilization module, a cold and heat storage module, and an operation control module; The operation control module is configured as follows: The system monitors the output power of the wind and solar power generation and energy storage modules and the hydrogen production power of the hydrogen and oxygen production modules in real time. Based on the power deviation value, it controls the charging and discharging process of the electrochemical energy storage module and schedules the transmission or extraction of electrical energy to the grid. Based on the process cold load and heat load data of the hydrogen and oxygen production module, the operating status of the hydrogen power generation module is dynamically adjusted. Through start-stop control, the waste heat utilization module recovers the high-temperature waste heat generated by hydrogen power generation, realizing the cascade utilization of cooling and heating, and simultaneously operating the cold and heat storage module to store or release cold and heat energy. Based on seasonal external load characteristics, the operating priority sequence of waste heat utilization module, cold and heat storage module and electric refrigeration unit is set, and the energy supply is switched when the load fluctuates to optimize the overall energy efficiency and economy of the system.

[0023] In this embodiment, the high-efficiency wind-solar-hydrogen-storage-gas integrated energy supply system includes a wind and solar power generation and storage module, a hydrogen and oxygen production module, a hydrogen power generation module, a waste heat utilization module, a cold and heat storage module, and an operation control module. The wind and solar power generation and storage module consists of wind power generation equipment, photovoltaic power generation modules, and an electrochemical energy storage module. The wind power generation equipment and photovoltaic modules capture wind energy and solar energy respectively and convert them into electrical energy. The electrochemical energy storage module is used to temporarily store excess electrical energy generated during system operation. The hydrogen and oxygen production module is mostly based on water electrolysis technology, using the system's electrical energy to decompose water into hydrogen and oxygen, providing raw materials for subsequent hydrogen energy utilization. The hydrogen power generation module converts the chemical energy of hydrogen into electrical energy through fuel cells or gas turbines, supplementing the overall power supply demand of the system. The waste heat utilization module specifically collects the high-temperature waste heat generated during hydrogen power generation, preventing direct energy loss. The cold and heat storage module can store the cold and heat generated during system operation and release them during peak demand to balance supply and demand. The operation control module, as the core control unit of the system, is responsible for coordinating the orderly operation of each module. The operation control module is specifically configured with three core functions: First, it collects the actual output power of the wind and solar power generation and energy storage modules, and the actual hydrogen production power of the hydrogen and oxygen production modules in real time, calculates the deviation between these two power values ​​and the preset target values, and controls the charging and discharging operation of the electrochemical energy storage module based on the deviation values—initiating charging when there is excess power and initiating discharging when there is insufficient power, while simultaneously scheduling the interaction between electrical energy and the grid, transmitting excess electrical energy to the grid, and extracting supplementary energy from the grid when there is a shortage; Second, it acquires the process cold load (such as the cooling requirements for equipment cooling and reaction cooling) and heat load (such as the heat requirements for reaction heating and equipment insulation) data of the hydrogen and oxygen production modules, and dynamically adjusts the operating status of the hydrogen power generation module (such as adjusting the power generation capacity and start / stop timing) based on this data, and controls the start / stop operation through start / stop control. The system utilizes waste heat recovery modules to reclaim high-temperature waste heat generated by hydrogen power generation. This waste heat is first used to meet the system's heat load requirements, and then the remaining waste heat drives refrigeration equipment for cooling, achieving tiered utilization of cooling and heating. Simultaneously, cold and heat storage modules operate concurrently, storing heat when it is sufficient and releasing it when demand increases. Thirdly, considering the external load characteristics of different seasons (e.g., significantly increased cooling load in summer and substantial increase in heating load in winter), a priority sequence is set for the operation of the waste heat recovery modules, cold and heat storage modules, and electric refrigeration devices. When external load fluctuates, energy supply is switched according to the priority sequence (e.g., when the cooling load surges in summer, the cold storage module is activated first to release cooling capacity, and the electric refrigeration device is activated to supplement if insufficient), thereby optimizing the overall energy efficiency and operational economy of the system. Through the coordinated operation of each module and the precise control of the operation control module, the output fluctuations of wind and solar power generation can be stabilized, improving the comprehensive energy utilization efficiency, while enhancing the system's adaptability to seasonal and sudden load fluctuations, effectively optimizing the overall energy efficiency and operational economy of the system.

[0024] This application discloses a high-efficiency integrated wind, solar, hydrogen, and fuel storage energy supply system, characterized by comprising: a wind and solar power generation and storage module, a hydrogen and oxygen production module, a hydrogen power generation module, a waste heat utilization module, a cold and heat storage module, and an operation control module. The operation control module is configured to: monitor the output power of the wind and solar power generation and storage module and the hydrogen production power of the hydrogen and oxygen production module in real time; control the charging and discharging process of the electrochemical energy storage module based on the power deviation value; and schedule the transmission or extraction of electrical energy to the grid. Based on the process cold and heat load data of the hydrogen and oxygen production module, it dynamically adjusts the operating status of the hydrogen power generation module; through start-stop control, it enables the waste heat utilization module to recover the high-temperature waste heat generated by hydrogen power generation, achieving cascade utilization of cooling and heating; and simultaneously operates the cold and heat storage module to store or release cold and heat energy. Based on seasonal external load characteristics, it sets the operating priority sequence of the waste heat utilization module, the cold and heat storage module, and the electric refrigeration device, switching energy supply during load fluctuations to optimize the overall energy efficiency and economy of the system. It can solve the problems of unstable wind and solar power output, low energy utilization efficiency, weak ability to cope with load fluctuations and poor system economy caused by the lack of multi-energy module coordinated control mechanism, inability to effectively recover waste heat from hydrogen power generation, and difficulty in optimizing energy supply strategy according to load characteristics. It can achieve the technical effects of stabilizing wind and solar power output, improving comprehensive energy utilization efficiency, enhancing system adaptability to load fluctuations, and optimizing overall system energy efficiency and economy.

[0025] In this embodiment, the operation control module includes a parameter monitoring module, a mode switching module, a load matching module, and an optimization control module; The parameter monitoring module is used to collect real-time data on wind and solar power generation, hydrogen production, operating parameters of various equipment, process cooling load, process heat load, and remaining energy storage capacity. The mode switching module is used to dynamically switch between pure hydrogen combined power generation and pure hydrogen non-power generation operation mode based on the difference between wind and solar power generation and hydrogen production power and the preset power threshold. The load matching module is used to coordinate the start-up and shutdown of cold and heat storage tanks, steam-type lithium bromide units and electric refrigeration units based on the difference between process cooling load, process heating load and equipment power supply load and preset heating load threshold. The optimization control module is used to perform multi-device operation priority sorting, giving priority to waste heat drive equipment. When the remaining energy of electrochemical energy storage is lower than the preset minimum energy storage threshold, the energy storage discharge mode is turned off and grid power purchase is initiated.

[0026] In this embodiment, the operation control module consists of a parameter monitoring module, a mode switching module, a load matching module, and an optimization control module. Each module has a clearly defined function and works together to support the efficient operation of the system. The parameter monitoring module can collect key system data in real time. Among them, wind and solar power generation power is the total electrical power output of wind turbines and photovoltaic modules; hydrogen production power is the electrical power required for the operation of core hydrogen production equipment such as electrolyzers and rectifiers; equipment operating parameters include the current and voltage of the electrolyzer, the speed of the gas turbine, and the operating status of the steam-type lithium bromide unit; process cooling load refers to the cooling requirements of hydrogen production process equipment such as oxygen coolers and hydrogen coolers; process heat load refers to the heat requirements such as heating of the hydrogen production station building; and the remaining energy storage capacity is the current state of charge of the electrochemical energy storage equipment (reflecting the remaining stored electrical energy). The mode switching module uses the difference between wind and solar power generation and hydrogen production power as the core judgment criterion, combined with preset power thresholds (e.g., a positive difference indicates excess power, a negative difference indicates insufficient power), to dynamically switch between a pure hydrogen combined power generation operation mode (starting to supplement power when power is insufficient) and a pure hydrogen non-power generation operation mode (starting to avoid waste when power is excessive). The load matching module coordinates equipment start-up and shutdown based on the difference between process cooling load, process heating load, and the power supply load of equipment such as cold storage tanks and steam-type lithium bromide units, with reference to preset heating load thresholds. For example, when the process cooling load is lower than the equipment power supply load, cold storage tanks are prioritized; when the load exceeds the load, electric chillers are started. The optimization control module is responsible for executing the priority ranking of multiple equipment operations, prioritizing the use of waste heat driven equipment (such as steam-type lithium bromide units operating on waste heat from power generation) to reduce additional energy consumption. When the remaining energy of electrochemical energy storage is lower than the preset minimum energy storage threshold, the energy storage discharge mode is shut down, and grid power is purchased to supplement power, preventing damage to the energy storage equipment from excessive discharge. This operation control module can accurately monitor the system's operating status, effectively improve energy utilization efficiency, and ensure energy supply stability.

[0027] In this embodiment, when the power generation of the wind and solar power generation and energy storage modules is greater than the hydrogen production power of the hydrogen and oxygen production modules, the operation control module controls the electrochemical energy storage module to enter the charging mode and feeds the remaining electrical energy into the power grid through the step-up substation.

[0028] In this embodiment, when the operation control module performs regulation operations under specific power conditions, it first acquires two key parameters in real time: the power generation power of the wind and solar power generation and energy storage module and the hydrogen production power of the hydrogen and oxygen production module. The power generation power of the wind and solar power generation and energy storage module refers to the total electrical power output by the wind power generation equipment in the module after capturing and converting wind energy, and the photovoltaic power generation components after absorbing and converting solar energy. The hydrogen production power of the hydrogen and oxygen production module is the electrical power consumed by the module to maintain the stable operation of the water electrolysis hydrogen production process and ensure the continuous production of hydrogen. The operation control module compares the two types of power data in real time. When it determines that the power generation of the wind and solar power generation and energy storage module is greater than the hydrogen production power of the hydrogen and oxygen production module, it immediately generates corresponding control commands: On the one hand, it sends a start signal to the electrochemical energy storage module to control it to switch to charging mode. At this time, the energy storage battery pack in the electrochemical energy storage module will receive the excess electrical energy generated by the power difference between the two types through a preset charging circuit, and store this electrical energy in the form of chemical energy inside the battery to avoid the idle waste of electrical energy in this stage; on the other hand, for the electrical energy that is still left after being stored by the electrochemical energy storage module, the operation control module will guide it to the step-up substation. The step-up substation will use its internal power transformer to raise the voltage level of this part of the electrical energy to a voltage that meets the public grid access standard (such as 110kV, 220kV, etc., depending on the grid access requirements), and then feed the electrical energy into the grid through a dedicated transmission line to realize the effective external transmission of excess electrical energy. It can efficiently utilize the excess electricity generated by wind and solar power, avoid energy waste, and improve energy utilization efficiency; at the same time, it can achieve coordinated dispatch with the power grid, supplement the power grid with electricity, and store electricity through energy storage modules to ensure energy supply when power is insufficient in the future.

[0029] In this embodiment of the application, when the operation control module is running during the cooling season, and when it is detected that the sum of the process cooling load and the cooling load of the hydrogen production station cooling system is lower than the cooling capacity of the cold and heat storage module, the cold and heat storage module provides independent cooling; when it is detected that the sum of the process cooling load and the cooling load of the hydrogen production station cooling system is higher than the cooling capacity of the cold and heat storage module, the electric cooling device is started to provide cooling, and the electric cooling device is used only for cooling after the cooling capacity of the cold and heat storage module is exhausted. During the heating season, the operation control module utilizes the cold and heat storage modules to provide heat and starts the electric refrigeration unit to provide cooling for the process cooling load. When the operation control module is running during the transition season, if it detects that the process cooling load is lower than the cooling capacity of the cold and heat storage module, it will only use the cold and heat storage module for cooling; if the process cooling load is higher than the cooling capacity of the cold and heat storage module, it will start the electric cooling device for cooling, and after the cooling capacity of the cold and heat storage module is exhausted, it will only use the electric cooling device for cooling.

[0030] In this embodiment, the operation control module will execute differentiated cooling and heating regulation logic according to seasonal differences. The process cooling load refers to the cooling capacity required to maintain the reaction temperature and heat dissipation of the production processes such as hydrogen and oxygen production in the system. The cooling load of the hydrogen production station cooling system is the cooling capacity required by the cooling system specifically designed to ensure the stable operation of the core equipment of the hydrogen production station. The cooling capacity of the cold and heat storage module is the maximum cooling capacity that the module can output through the energy storage medium and heat exchange structure. During the cooling season, the operation control module continuously collects data on the process cooling load and the cooling load of the hydrogen production station's cooling system and calculates their sum. At the same time, it monitors the current cooling capacity of the cold and heat storage modules in real time. When the sum of the two types of cooling loads is lower than the cooling capacity of the cold and heat storage modules, the module will cut off the circuits of other cooling equipment and only instruct the cold and heat storage modules to transport the stored cold energy to the cooling-requiring links through the heat exchange device to achieve independent cooling. When the sum of the two types of cooling loads is higher than the cooling capacity of the cold and heat storage modules, the electric refrigeration device (a device that uses electricity to drive the compressor to generate cold energy) will be started immediately to provide cooling in coordination with the cold and heat storage modules. When the cold energy of the cold and heat storage modules is subsequently monitored to drop to the minimum threshold (i.e., the cold energy is exhausted), the cooling channel of the cold and heat storage modules will be automatically shut off, and only the electric refrigeration device will continue to provide cooling. During the heating season, the operation control module switches the cold and heat storage modules to heat storage release mode, transferring the stored heat to areas requiring heat (such as process insulation and ambient heating) through heat exchange pipelines. Simultaneously, considering the ongoing process cooling load demand during the heating season, an electric refrigeration unit is activated separately to provide cooling for the processes requiring cooling, preventing the cooling load from affecting heating stability. During the transition season (a period of seasonal change with relatively small fluctuations in cooling and heating loads), the module simplifies monitoring, collecting only process cooling load data and comparing it with the cooling capacity of the cold and heat storage modules. When the process cooling load is lower than the cooling capacity, only the cold and heat storage modules are controlled to provide cooling; when the process cooling load is higher than the cooling capacity, the electric refrigeration unit is activated first to provide cooling in conjunction with the cold and heat storage modules. Once the cooling capacity of the cold and heat storage modules is exhausted, the module switches to electric refrigeration unit-only cooling. This precise control adapts to different seasonal load characteristics, prioritizing the use of energy from the cold and heat storage modules, reducing ineffective energy consumption of the electric refrigeration units, improving energy utilization efficiency, and ensuring a stable supply of cooling and heating demand in each season.

[0031] In this embodiment, when the power generation of the wind and solar power generation and energy storage modules is less than the hydrogen production power of the hydrogen and oxygen production modules, the operation control module controls the electrochemical energy storage module to enter the discharge mode, and at the same time starts the hydrogen power generation module to perform peak power generation.

[0032] In this embodiment, when the operation control module performs power regulation operations, it first collects two types of key power data in real time: one is the power generation of the wind and solar power generation and energy storage modules, which is the total output power of electrical energy generated by the wind power generation equipment capturing wind energy and the photovoltaic power generation components absorbing solar energy within the modules after energy conversion; the other is the hydrogen production power of the hydrogen and oxygen production modules, which is the electrical energy consumption power required by the hydrogen and oxygen production modules to maintain the stable operation of the water electrolysis hydrogen production process and ensure continuous hydrogen production. The operation control module compares the two types of power data in real time. When it is determined that the power generation of the wind and solar power generation and energy storage modules is less than the hydrogen production power of the hydrogen and oxygen production modules, that is, the current power supply of the system cannot meet the hydrogen production demand, it will simultaneously generate two core control commands. One instruction is sent to the electrochemical energy storage module, controlling it to switch from standby mode to discharge mode. At this time, the energy storage battery pack within the electrochemical energy storage module releases previously stored electrical energy (mostly stored energy from excess wind and solar power generation) into the system's power grid through a preset discharge circuit, directly supplementing the current power gap and providing partial power support for the hydrogen and oxygen production modules. The other instruction is used to activate the hydrogen power generation module. Upon receiving the instruction, the hydrogen power generation module converts the chemical energy of hydrogen previously produced and stored by the hydrogen and oxygen production module into electrical energy through core equipment such as fuel cells or gas turbines. This electrical energy is directly connected to the system's power grid, working together with the electricity released by the electrochemical energy storage module to compensate for insufficient wind and solar power generation, achieving peak power generation and ensuring a stable and sufficient power supply for the hydrogen and oxygen production modules. This prevents interruptions or efficiency drops in the hydrogen production process due to insufficient power. This method can quickly compensate for power shortages caused by insufficient wind and solar power generation, ensuring the operational stability of the hydrogen and oxygen production modules, while efficiently utilizing energy storage resources and hydrogen energy, improving the system's power supply reliability and energy utilization flexibility.

[0033] In this embodiment, during the cooling season, when the operation control module detects that the sum of the process cooling load and the cooling load of the hydrogen production station cooling system is lower than the cooling capacity of the waste heat utilization module, the waste heat utilization module independently supplies cooling and stores the remaining cooling capacity in the cold and heat storage module; when the sum of the process cooling load and the cooling load of the hydrogen production station cooling system is higher than the cooling capacity of the waste heat utilization module, the cold and heat storage module is controlled to release the cooling capacity, and the electric cooling device is started to supplement the cooling capacity after the cooling capacity is exhausted. During the heating season, when the operation control module detects that the heat load of the hydrogen production station's heating system is lower than the heating capacity of the waste heat utilization module, the waste heat utilization module will provide heat and store the remaining heat in the cold and heat storage module; when the heat load of the hydrogen production station's heating system is higher than the heating capacity of the waste heat utilization module, the module will control the waste heat utilization module and the cold and heat storage module to provide heat together; and the waste heat utilization module will work in conjunction with the electric chiller to provide cooling. When the operation control module is running during the transition season, if it detects that the process cooling load is lower than the cooling capacity of the waste heat utilization module, the waste heat utilization module will prioritize cooling and store the remaining cooling capacity in the cold and heat storage module; when the process cooling load is higher than the cooling capacity of the waste heat utilization module, the cold and heat storage module will be controlled to release the cooling capacity, and the electric refrigeration unit will be started to supplement the cooling after the cooling capacity is exhausted.

[0034] In this embodiment, under specific power conditions (i.e., when the power generation of the wind and solar power generation and energy storage modules is less than the hydrogen production power of the hydrogen and oxygen production modules, the operation control module has controlled the electrochemical energy storage module to enter the discharge mode and started the hydrogen power generation module for peak power generation), it will execute differentiated cooling and heating control logic according to seasonal differences. Among them, the process cooling load refers to the cooling capacity required by the core production processes such as hydrogen and oxygen production in the system to maintain stable reaction temperatures and meet the heat dissipation requirements of the equipment; the cooling load of the hydrogen production station cooling system is the cooling capacity required by the cooling system specifically designed to ensure that the key equipment (such as electrolyzers and hydrogen purification devices) of the hydrogen production station operates in a suitable temperature environment; the heating load of the hydrogen production station heating system is the heat required to ensure the insulation of the hydrogen production station equipment and the heating of the process reaction; the cooling capacity of the waste heat utilization module is the maximum cooling capacity that can be output after the module recovers the high-temperature waste heat generated during the hydrogen power generation process and converts it through heat exchange, and its heating capacity is the maximum heat capacity that can be converted and output after recovering the high-temperature waste heat.

[0035] During the cooling season, the operation control module continuously collects data on the process cooling load and the cooling load of the hydrogen production station's cooling system and calculates their sum. Simultaneously, it monitors the current cooling capacity of the waste heat recovery module in real time. When the sum of the two cooling loads is lower than the cooling capacity of the waste heat recovery module, the module instructs the module to independently undertake the cooling task, converting the recovered high-temperature waste heat into cooling capacity and delivering it to the cooling-required areas. Simultaneously, any unused remaining cooling capacity is transported through heat exchange pipelines to the cold and heat storage module for storage, ready for later use. When the sum of the two cooling loads exceeds the cooling capacity of the waste heat recovery module, a command to release cooling capacity is first sent to the cold and heat storage module. This utilizes the previously stored cooling capacity to supplement the cooling gap in the waste heat recovery module. Once the cooling capacity of the cold and heat storage module drops to the minimum threshold (i.e., the cooling capacity is exhausted), the electric refrigeration unit (a device that uses electricity to drive a compressor to compress refrigerant and generate cooling capacity) is activated to supplement the cooling supply, ensuring that the cooling capacity meets the demand.

[0036] During the heating season, the operation control module will focus on collecting heat load data of the hydrogen production station's heating system and comparing it with the heating capacity of the waste heat utilization module. When the heat load of the hydrogen production station's heating system is detected to be lower than the heating capacity of the waste heat utilization module, the waste heat utilization module will convert the recovered high-temperature waste heat into heat to provide heating services for the hydrogen production station independently, while transferring the excess heat to the cold and heat storage module for storage. When the heat load of the hydrogen production station's heating system is detected to be higher than the heating capacity of the waste heat utilization module, the module will instruct the waste heat utilization module and the cold and heat storage module to operate in coordination. The cold and heat storage module will release the previously stored heat, which, together with the heat output from the waste heat utilization module, will meet the heating demand. At the same time, considering that there is still a process cooling load demand during the heating season, the operation control module will start the electric chiller, allowing the waste heat utilization module (if it has spare capacity to convert some cooling capacity) to work in coordination with the electric chiller to ensure that the process cooling load is stably met.

[0037] During the transitional season (a period of seasonal change and relatively stable fluctuations in heating and cooling loads), the operation control module simplifies the monitoring dimensions, collecting only process cooling load data and comparing it with the cooling capacity of the waste heat utilization module. When the process cooling load is detected to be lower than the cooling capacity of the waste heat utilization module, the waste heat utilization module will prioritize converting the recovered high-temperature waste heat into cooling capacity for supply, while storing the excess cooling capacity in the cold and heat storage module. When the process cooling load is detected to be higher than the cooling capacity of the waste heat utilization module, the cold and heat storage module will first release the stored cooling capacity to supplement the cooling supply. After the cold and heat storage module has exhausted its cooling capacity, the electric refrigeration unit will be started to continue supplementing the cooling supply, ensuring the stability of the process cooling load.

[0038] Prioritize the use of waste heat resources for cooling and heating, reduce reliance on energy-consuming equipment such as electric refrigeration units, and store excess energy through cold and heat storage modules to adapt to different seasonal load characteristics, ensuring stable cooling and heating supply and effectively improving energy utilization and system operation economy.

[0039] In this embodiment, the remaining capacity of the electrochemical energy storage module is monitored. When the remaining capacity is lower than a preset minimum threshold, the discharge circuit of the electrochemical energy storage module is blocked and the system is switched to purchase power from the grid to ensure continuous operation of the system.

[0040] In this embodiment, the operation control module continuously monitors the remaining capacity of the electrochemical energy storage module. The remaining capacity refers to the total amount of electrical energy that the battery pack within the module can currently release, typically expressed as a percentage of the rated capacity or a specific energy value (e.g., kilowatt-hours). The preset minimum threshold is a lower limit of the remaining capacity (e.g., 10% to 20% of the rated capacity) pre-set based on the charge-discharge cycle life of the energy storage battery, safe operation requirements, and system emergency power supply needs. During monitoring, the operation control module collects parameters such as the battery pack's terminal voltage, charge-discharge current, and temperature in real time through voltage sensors, current sensors, and the battery management unit connected to the electrochemical energy storage module. It then dynamically calculates and updates the remaining capacity data using preset battery capacity algorithms (e.g., ampere-hour integration method, open-circuit voltage method), and compares the calculation results with the preset minimum threshold in real time. When the remaining capacity is detected to be below a preset minimum threshold, the operation control module immediately executes two linked operations: First, it sends a blocking command to the discharge circuit of the electrochemical energy storage module, controlling the electronic switching elements (such as high-voltage contactors and solid-state relays) in the discharge circuit to disconnect the circuit, preventing the energy storage battery pack from being damaged by over-discharge, resulting in electrode structure damage, permanent capacity decay, or safety risks (such as battery bulging or leakage); Second, it simultaneously initiates the grid power purchase switching process, controlling the access interface unit between the control system and the public grid, closing the switching devices of the grid power supply circuit, and switching the system's power supply source from the electrochemical energy storage module to the public grid, ensuring that core equipment such as the hydrogen and oxygen production module and the hydrogen power generation module can still obtain stable power, and ensuring the continuous operation of the entire power supply system without interruption. This embodiment can effectively avoid damage to the electrochemical energy storage module due to over-discharge, extend its service life and ensure operational safety, while ensuring uninterrupted power supply to the core equipment of the system by timely switching to grid power purchase, maintaining overall operational continuity.

[0041] Figure 2 This is a schematic diagram of a high-efficiency integrated wind, solar, hydrogen, and fuel storage energy supply system further provided in the embodiments of this application, as shown below. Figure 2 As shown: In this embodiment, the wind and solar power generation and energy storage module includes a wind power generation unit (1), a photovoltaic power generation unit (2), a wind and solar booster station (3), an electrochemical energy storage unit (4), and a power grid (5). The output terminals of the wind power generation unit (1) and the photovoltaic power generation unit (2) are connected to the wind-solar booster station (3), and the wind-solar booster station (3) is connected to the electrochemical energy storage unit (4), the power grid (5) and the hydrogen production station transformer group (6), respectively.

[0042] The hydrogen and oxygen production module includes a hydrogen production station transformer group (6), a rectifier (7), an electrolyzer (8), an oxygen separation and storage unit, a hydrogen separation and storage unit, and a hydrogen filling station (19). The transformer group (6) of the hydrogen production station is connected to the power grid (5) and the rectifier (7) respectively. The rectifier (7) is connected to the electrolyzer (8). The electrolyzer (8) is connected to the oxygen separation and storage unit and the hydrogen separation and storage unit respectively. The hydrogen separation and storage unit is connected to the hydrogen filling station (19).

[0043] The oxygen separation and storage unit includes an oxygen separator (9), an oxygen scrubber (10), an oxygen cooler (11), and an oxygen storage tank (12) connected in sequence; the hydrogen separation and storage unit includes a hydrogen separator (13), a hydrogen scrubber (14), a hydrogen cooler (15), a hydrogen purification system (16), a hydrogen compression system (17), and a hydrogen storage tank (18) connected in sequence; the hydrogen storage tank (18) is connected to a hydrogen filling station (19) and a hydrogen pressure regulating station (20) respectively.

[0044] The hydrogen power generation module includes a hydrogen pressure regulating station (20), an air compressor (21), a combustion chamber (22), a gas turbine (23), a steam hot water waste heat boiler (24), and a steam turbine (25). The hydrogen pressure regulating station (20) is connected to the combustion chamber (22), which is connected to the air compressor (21) and the gas turbine (23). The gas turbine (23) is connected to the steam hot water waste heat boiler (24), which is connected to the steam turbine (25), the heating water supply pump 1 (P-1), and the heating return water pump (P-3). The steam hot water waste heat boiler (24) is also connected to the steam type lithium bromide unit (27) through electric valve a.

[0045] The waste heat utilization module includes a steam-type lithium bromide unit (27), an electric refrigeration unit (29), a steam hot water waste heat boiler (24), a hydrogen production station heating system (26), a hydrogen production station cooling system (31), a chilled water cooling pump 1 (P-4), a chilled water return pump 1 (P-8), a heating water supply pump 1 (P-1), a heating water return pump (P-3), a circulating cooling water supply pump (P-10), a circulating cooling water return pump (P-11), a cooling tower (30), a chilled water supply manifold (H-1), a chilled water return diverter (F-3), a heating diverter (F-1), an electric valve a, an electric valve g, an electric valve i, and an electric valve j.

[0046] The steam hot water waste heat boiler (24) outputs steam and connects to the steam type lithium bromide unit (27), and outputs hot water and connects to the heating water supply pump 1 (P-1); the steam type lithium bromide unit (27) is connected to the chilled water cooling pump 1 (P-4) and the chilled water return diverter (F-3) respectively.

[0047] Chilled water supply pump 1 (P-4) is connected to chilled water supply manifold (H-1); chilled water supply manifold (H-1) is connected to chilled water supply pump 3 (P-7) via electric valve g, and then connected to electric chiller unit (29); electric chiller unit (29) is connected to circulating cooling water supply pump (P-10), cooling tower (30), and circulating cooling water return pump (P-11) in sequence via electric valve j to form a cooling cycle; chilled water return diverter (F-3) is connected to steam-type lithium bromide unit (27) and electric valve i respectively, and electric valve i is connected to chilled water return pump 2 (P-9) and then connected to electric chiller unit (29).

[0048] Heating water pump 1 (P-1) is connected to heating water distributor (F-1); the hydrogen production station heating system (26) is connected to heating return water pump (P-3), and finally flows back to steam hot water waste heat boiler (24).

[0049] The cold and heat storage module includes a cold and heat storage tank (28), a chilled water cold storage pump (P-5), a chilled water supply pump 2 (P-6), a heating water supply pump 2 (P-2), electric valves b, c, d, e, f, and h, a chilled water supply diverter (F-2), and a chilled water return manifold (H-2).

[0050] The steam-type lithium bromide unit (27) is connected to the chilled water storage pump (P-5) via electric valve b, and then connected to the cold and heat storage tank (28); the cold and heat storage tank (28) is connected to the chilled water supply manifold (H-1) via the chilled water supply pump 2 (P-6) and electric valve f; the chilled water supply diverter (F-2) is connected to the hydrogen production station cooling system (31) via electric valve h, and then flows back to the chilled water return manifold (H-2).

[0051] The cold and heat storage tank (28) is connected to the hydrogen production station heating system (26) via the heating water supply pump 2 (P-2) and electric valve c; the heating water distributor (F-1) is connected to the cold and heat storage tank (28) via electric valve e, and the hydrogen production station heating system (26) is connected to the heating water distributor (F-1) via electric valve d.

[0052] The chilled water supply diverter (F-2) is connected to the oxygen cooler (11), hydrogen cooler (15), hydrogen purification system (16), and hydrogen compression system (17), respectively. The return water from the relevant equipment flows back to the chilled water return manifold (H-2), and then is connected to the chilled water return diverter (F-3) via the chilled water return pump 1 (P-8).

[0053] Accordingly, embodiments of this application provide an operation method for a high-efficiency integrated wind, solar, hydrogen, and fuel storage energy supply system, such as... Figure 3 As shown, the method includes: Step 301: Monitor and compare the power generation of the wind and solar power generation and energy storage modules with the hydrogen production power of the hydrogen and oxygen production modules, and dynamically switch the system operation mode based on the comparison results.

[0054] In some embodiments, the power generation of the wind and solar power generation and energy storage module refers to the total power output of the wind turbine generator (which captures airflow energy through blades and converts it into mechanical energy, which is then converted into electrical energy by the generator) and the photovoltaic array (which utilizes the photovoltaic effect of semiconductor materials to directly convert solar radiation energy into electrical energy) within the module. This also needs to be calculated in conjunction with the real-time charging and discharging status of the electrochemical energy storage unit within the module—if the energy storage unit is in a charging state, the power generation needs to deduct the charging power consumption; if it is in a discharging state, the power generation needs to be added to the discharging output power. The hydrogen production power of the hydrogen and oxygen production module is the electrical energy consumption power necessary for the module to maintain the stable operation of the water electrolysis hydrogen production process. Specifically, it needs to match the rated operating current and voltage of the electrolyzer and the actual hydrogen production requirements. For example, when it is necessary to increase hydrogen production, the hydrogen production power needs to be increased accordingly to meet the electrolysis reaction rate requirements.

[0055] During the execution of step 301, the system uses high-precision power sensors (such as Hall effect current sensors and voltage sensors) deployed on the output bus of the wind and solar power generation and energy storage modules to collect real-time current and voltage signals at a frequency of 15-30 seconds per acquisition, and dynamically calculates the power generation power using the power calculation formula. Simultaneously, the system collects real-time power consumption data of the hydrogen and oxygen production modules through intelligent energy metering devices in the power supply circuit, and converts this data into hydrogen production power. After the two types of power data are transmitted to the data analysis unit of the operation control module via industrial Ethernet, real-time numerical comparisons are performed. To avoid frequent mode switching caused by instantaneous power fluctuations, a power deviation allowable range of ±5% is set. When the comparison results show that the power generation is greater than the hydrogen production power and exceeds the deviation range, the system switches to the "energy storage + grid feed" mode. That is, the electrochemical energy storage unit is controlled to start charging and storing excess electrical energy. If there is still electrical energy left, it is fed into the public grid through the step-up substation. When the power generation is less than the hydrogen production power and exceeds the deviation range, the system switches to the "energy storage discharge + hydrogen energy replenishment" mode. That is, the electrochemical energy storage unit is controlled to release the stored electrical energy, and at the same time, the hydrogen energy power generation module is started (using the hydrogen stored in the previous hydrogen production stage, which is converted into electrical energy through fuel cells or gas turbines) to supplement the power gap. When the two types of power are basically equal within the allowable deviation range, the system maintains the "direct power supply" mode. That is, the electrical energy output from wind and solar power generation and the energy storage module is directly supplied to the hydrogen and oxygen production modules, without the need to start the energy storage charging and discharging or hydrogen energy power generation stages.

[0056] By monitoring and accurately comparing key power parameters in real time, the system can promptly detect imbalances in energy supply and demand, quickly switch to suitable operating modes, effectively avoid energy waste or insufficient power supply, ensure the balance of energy supply and demand in the system, and lay a stable foundation for the coordinated operation of subsequent modules.

[0057] Step 302: Based on the operating mode and the seasonal load characteristics of the cooling season, heating season, and transition season, execute the preset cooling and heating strategy through the operation control module to coordinate the start-up and shutdown of multiple devices and energy storage and utilization.

[0058] In some embodiments, step 302, based on the system operation mode determined in step 301, further incorporates the seasonal load characteristics of the cooling season, heating season, and transitional season. Through the operation control module, a preset cooling and heating strategy is implemented to achieve coordinated start-up and shutdown of multiple devices and precise control over energy storage and utilization. Seasonal load characteristics refer to the differences in the system's demand for cooling and heating in different seasons. During the cooling season, the process cooling load of the hydrogen and oxygen production modules (the cooling required to maintain stable electrolyzer reaction temperature and equipment heat dissipation) and the cooling load of the hydrogen production station's cooling system (the cooling required to ensure hydrogen purification and low-temperature operation of storage equipment) increase significantly, while the heating load is extremely low. During the heating season, the heating load of the hydrogen production station's heating system (the heat required for equipment insulation and process reaction heating) increases substantially, while the process cooling load only maintains basic needs. During the transitional season, both cooling and heating loads are at low levels and fluctuate gently. The preset cooling and heating strategy is a set of equipment operation priorities and energy scheduling rules pre-determined based on the load characteristics of different seasons. For example, during the cooling season, waste heat is prioritized for conversion into cooling capacity, and during the heating season, waste heat is prioritized for conversion into heating capacity, reducing the frequency of starting high-energy-consuming equipment.

[0059] In specific implementation, if step 301 switches to the "energy storage + grid feed" mode (sufficient power generation), during the cooling season, the operation control module will first monitor the total cooling load and the cooling capacity of the waste heat utilization module. If the cooling load is lower than the cooling capacity, only the waste heat utilization module will be activated for cooling, and excess cooling capacity will be stored in the cold and heat storage module. If the cooling load is higher, the cold and heat storage module will be used first to release cooling, and if insufficient, the electric cooling device will be activated. During the heating season, the heat load and the heating capacity of the waste heat utilization module will be monitored. If the heat load is low, waste heat will be used for heating and storage alone. If the heat load is high, waste heat and the cold and heat storage module will work together for heating, and electric cooling will be activated to meet the basic process cooling load. If step 301 switches to the "energy storage discharge + hydrogen energy supplementation" mode (insufficient power generation), the energy stored in the cold and heat storage module will be prioritized in each seasonal strategy to reduce the start-up and shutdown of high-energy-consuming equipment such as electric cooling. For example, when the cooling load is high during the transition season, cooling will be released first and then electric cooling will be activated to reduce additional power consumption. If it is a "direct power supply" mode (power balance), the seasonal basic strategy will be implemented to ensure the economy of equipment start-up and shutdown and energy utilization.

[0060] By adapting cooling and heating strategies to the system's operating mode and seasonal load, we can avoid equipment operating blindly, optimize energy scheduling, ensure stable cooling and heating demand, reduce energy consumption, and improve the overall operating efficiency of the system.

[0061] Figure 4 This application provides a further method for operating a high-efficiency integrated wind, solar, hydrogen, and fuel storage energy supply system, such as... Figure 4 As shown, the method includes: Step 401: Monitor and compare the power generation of the wind and solar power generation and energy storage modules with the hydrogen production power of the hydrogen and oxygen production modules.

[0062] In some embodiments, the power generation of the wind and solar power generation and energy storage module is not solely the output power of wind and solar power, but rather requires comprehensive calculation based on the operating status of multiple components within the module. Specifically, this includes the real-time output power of the wind turbine (which captures airflow energy, converts it into mechanical energy, and then into electrical energy via a generator), the real-time output power of the photovoltaic array (which utilizes the photovoltaic effect to convert solar radiation energy into electrical energy), and compensation for the charging and discharging power of the electrochemical energy storage unit within the module. If the energy storage unit is charging, the charging power consumption needs to be deducted from the total wind and solar power output; if it is discharging, the energy storage discharge power needs to be added to the total wind and solar power output to obtain the actual power generation that the module can provide. The hydrogen production power of the hydrogen and oxygen production module is the core energy consumption parameter for maintaining the electrolysis hydrogen production process. Its value needs to match the operating requirements of the electrolyzer, for example, adjusting the operating current and voltage of the electrolyzer according to the hydrogen production target to determine the required power consumption and ensure the continuous and stable hydrogen production process.

[0063] In practical implementation, the system deploys high-precision power monitoring devices (such as Hall current sensors and voltage transmitters) on the output buses of the wind and solar power generation and energy storage modules to collect real-time current and voltage signals at a frequency of 20-30 seconds per measurement. This data is then combined with power calculation formulas to dynamically calculate the power generation. Simultaneously, smart energy meters are installed on the power supply circuit of the hydrogen and oxygen production modules to collect real-time energy consumption data and convert it into hydrogen production power. Both types of power data are transmitted via an industrial bus (such as the Modbus protocol) to the data analysis unit of the operation control module, where they are compared in milliseconds. To avoid invalid comparisons caused by instantaneous power fluctuations (such as sudden changes in wind and solar power due to short-term gusts or cloud cover), a ±3% power deviation tolerance range is preset. Only when the comparison result exceeds this range is it determined that a significant change in energy supply and demand has occurred, providing accurate data for subsequent regulation. By accurately monitoring and comparing key power parameters in real time, the imbalance trend of energy supply and demand in the system can be captured in a timely manner, providing reliable data support for the subsequent formulation of control strategies and avoiding energy waste or insufficient power supply caused by power perception lag.

[0064] Step 402: When the power generation is greater than the hydrogen production, switch the operation mode to pure hydrogen non-power generation operation mode.

[0065] In some embodiments, after monitoring and comparison reveals that the power generation capacity of the wind and solar power generation and energy storage modules is greater than the hydrogen production capacity of the hydrogen and oxygen production modules, the system performs regulation operations. This mainly involves switching the operating mode to a pure hydrogen non-power generation operation mode and implementing specific energy dispatch strategies under this mode. The "pure hydrogen non-power generation operation mode" refers to an operating condition where the system does not need to activate the hydrogen power generation module (i.e., it does not obtain electricity through the chemical energy conversion of hydrogen), and the energy generated solely by the wind and solar power generation and energy storage modules can meet the energy consumption requirements of the hydrogen and oxygen production modules. Simultaneously, excess electricity is stored and transmitted externally.

[0066] In this mode, the operation control module first performs charging mode control on the electrochemical energy storage module: As the core unit for temporary energy storage in the system, when the charging mode of the electrochemical energy storage module is started, the battery management system in the module will first detect the current remaining capacity and health status of the energy storage battery pack (such as whether there is abnormal voltage of individual cells). If the status is normal, the high-voltage switch in the charging circuit will be closed, and the first part of the excess electrical energy after deducting the hydrogen production power required by the hydrogen production and oxygen production module from the electrical energy generated by wind and solar power generation and energy storage module will be input into the energy storage battery pack through the preset charging circuit (equipped with rectifier and filter components to convert AC power into DC power suitable for the battery) to convert electrical energy into chemical energy for storage. At the same time, the charging current and voltage are monitored in real time to avoid battery capacity decay or safety risks due to overcharging.

[0067] For the second portion of electrical energy remaining after storage by the electrochemical energy storage module, the operation control module will initiate a grid feed-in process: This surplus electrical energy is first transmitted to a step-up substation, where the power transformer will boost the voltage level of this energy (typically, wind and solar power output voltage is low voltage, such as 380V) to a high voltage level that meets the public grid access standards (such as 110kV, 220kV, adjusted according to local grid requirements), ensuring that the electrical parameters match the grid. Subsequently, through a dedicated transmission line and access interface connecting the system to the public grid, the boosted electrical energy is smoothly fed into the public grid, realizing the external transmission of surplus electrical energy and avoiding idle and wasted energy within the system. Throughout the process, the operation control module will continuously monitor the dynamic changes in power generation, hydrogen production, energy storage module charging power, and feed-in power to ensure balanced power distribution in each stage and maintain stable operation.

[0068] By using a pure hydrogen-only mode to avoid unnecessary hydrogen consumption and reduce operating costs, the electrochemical energy storage module stores excess electricity as a backup when power is insufficient, thus improving power supply flexibility. Excess electricity is fed into the grid to achieve energy transmission, thereby improving overall energy utilization and avoiding waste.

[0069] Step 403: When the power generation is less than the hydrogen production, switch the operation mode to pure hydrogen combined power generation operation mode.

[0070] In some embodiments, the “pure hydrogen combined power generation operation mode” refers to the operating state in which the system relies solely on the electrochemical energy storage module to release stored electrical energy and the hydrogen power generation module to convert hydrogen chemical energy into electricity, jointly supplementing the power gap of wind and solar power generation, so as to meet the energy consumption requirements of the hydrogen and oxygen production module, without the need to introduce other energy sources (such as grid power purchase).

[0071] In this mode, the operation control module first performs discharge mode control on the electrochemical energy storage module: the module will first detect the current remaining capacity and health status of the energy storage battery pack (such as the voltage balance of individual cells and temperature) through the battery management unit. If the remaining capacity is higher than the preset minimum discharge threshold (to avoid over-discharge damage), it will send a start command to the discharge circuit, and the high-voltage contactor in the control circuit will close, so that the energy storage battery pack converts the stored DC power into AC power that matches the system power supply network through the inverter, and then delivers the power to the power supply bus of the hydrogen and oxygen production module to directly supplement part of the power gap; at the same time, the module will monitor the discharge current and voltage in real time to ensure stable discharge power and avoid the hydrogen production process from being affected by sudden changes in current.

[0072] Simultaneously, the operation control module activates the hydrogen power generation module for peak power generation: Upon receiving the instruction, the hydrogen power generation module first opens the solenoid valve of the hydrogen supply pipeline, delivering the hydrogen produced by the hydrogen and oxygen production module and stored in the hydrogen storage tank to the fuel cell stack (or gas turbine) at a preset flow rate. If fuel cell technology is used, hydrogen will undergo an electrochemical reaction with air (or oxygen) inside the battery, directly converting chemical energy into electrical energy. If a gas turbine is used, hydrogen will generate high-temperature and high-pressure gas through combustion, driving the turbine to rotate and generating electricity. The generated electricity is rectified and stabilized before being connected to the system power supply bus, working in conjunction with the electricity released by the electrochemical energy storage module to precisely compensate for the remaining power gap. When the power gap is detected to be narrowing, the module will reduce the hydrogen supply to reduce power generation, and vice versa, to achieve peak power generation and ensure that the hydrogen and oxygen production module obtains a continuous and stable power supply.

[0073] The beneficial effects are as follows: by combining energy storage discharge with hydrogen power generation to supplement energy, the power gap of wind and solar power generation can be quickly and accurately made up for, ensuring the continuous and stable operation of hydrogen and oxygen production modules; at the same time, the peak-shaving function of hydrogen power generation can flexibly adapt to changes in power demand, improve the reliability and flexibility of the system's energy supply, and avoid hydrogen production interruptions due to insufficient power supply.

[0074] Step 404: In the pure hydrogen non-power generation operation mode, implement the pure hydrogen non-power generation cooling and heating strategy.

[0075] In some embodiments, during the cooling season, if the sum of the process cooling load and the cooling load of the hydrogen production station cooling system is lower than the cooling capacity of the cold and heat storage module, the cold and heat storage module provides cooling independently; if the sum of the process cooling load and the cooling load of the hydrogen production station cooling system is higher than the cooling capacity of the cold and heat storage module, the electric cooling device is started for cooling, and the electric cooling device is used for cooling only after the cooling capacity of the cold and heat storage module is exhausted.

[0076] During the cooling season, when the sum of the process cooling load Q1 and the cooling load Q2 of the hydrogen production station cooling system (Q1 + Q2) is less than the cooling load Q3 of the steam-type lithium bromide unit, only the steam-type lithium bromide unit is used for cooling, and the excess cooling capacity of the steam-type lithium bromide unit is stored in the cold and heat storage tanks. When Q1 + Q2 > the cooling load Q3 of the steam-type lithium bromide unit, the cold and heat storage tanks are started first for cooling. After the cooling capacity of the cold and heat storage tanks is used up, the electric refrigeration unit is started for cooling. That is, the wind and solar power generation system and photovoltaic power generation unit generate electricity, the electrochemical energy storage unit is in discharge mode, the electrolyzer is partially operating, the produced hydrogen is stored in the hydrogen storage tank after passing through the hydrogen separator, hydrogen scrubber, hydrogen cooler, hydrogen purification system and hydrogen compression system, and the produced oxygen is stored in the oxygen storage tank after passing through the oxygen separator, oxygen scrubber and oxygen cooler. The hydrogen pressure regulating station, air compressor, combustion chamber, gas turbine and steam... When the steam-heated waste heat boiler, steam turbine, and steam-type lithium bromide unit are operating, if Q1+Q2 < the cooling load Q3 of the steam-type lithium bromide unit, only electric valves a, b, and h are opened to start chilled water supply pump 1, chilled water storage pump, and chilled water return pump 1, utilizing only the steam-type lithium bromide unit for cooling. Excess cooling capacity of the steam-type lithium bromide unit is stored in a cold storage tank. If Q1+Q2 > the cooling load Q3 of the steam-type lithium bromide unit, electric valve b and the chilled water storage pump are closed, and electric valve f is opened to start chilled water supply pump 2, utilizing the cold and heat storage tank for cooling. After the cooling capacity of the cold and heat storage tank is used up, electric valve f and chilled water supply pump 2 are closed, and then electric valves g, i, and j are opened to start the electric refrigeration unit, chilled water supply pump 3, chilled water return pump 2, circulating cooling water supply pump, and circulating cooling water return pump for cooling.

[0077] During the heating season, the cold and heat storage modules are used for heating, and the electric refrigeration unit is started to provide cooling for the process cooling load.

[0078] During the heating season, when the heat load Qr of the hydrogen production station's heating system is less than the heat load Qg of the steam-hot water waste heat boiler, the steam-hot water waste heat boiler is used for heating, and excess heat is stored in the cold storage and heat storage tanks. When the heat load Qr of the hydrogen production station's heating system is greater than the heat load Qg of the steam-hot water waste heat boiler, both the steam-hot water waste heat boiler and the cold storage and heat storage tanks are used for heating. At the same time, the process cooling load is supplied by a steam-type lithium bromide unit. When the cooling load is insufficient, the electric chiller is started to provide cooling for the process cooling load in conjunction with the process cooling load. The system consists of a wind and solar power generation system, a photovoltaic power generation unit generating electricity, an electrochemical energy storage unit operating in discharge mode, an electrolyzer section operating, a hydrogen production system producing hydrogen that is then stored in a hydrogen storage tank via a hydrogen separator, hydrogen scrubber, hydrogen cooler, hydrogen purification system, and hydrogen compression system, and an oxygen production system producing oxygen that is then stored in an oxygen storage tank via an oxygen separator, oxygen scrubber, and oxygen cooler. The system also includes a hydrogen pressure regulating station, an air compressor, a combustion chamber, a gas turbine, a steam-fired hot water waste heat boiler, a steam turbine, and a steam-type lithium bromide unit. When the heat load of the hydrogen production station's heating system Qr is less than the heat load of the steam-fired hot water waste heat boiler Qg, electric valves e and d are opened, and heating water supply pump 1 and heating return water pump are started to supply heat to the hydrogen production station's heating system. When the heat load of the hydrogen production station's heating system Qr is greater than the heat load of the steam-fired hot water waste heat boiler Qg, electric valve e is closed, electric valve c is opened, and heating water supply pump 2 is started to supply heat to the hydrogen production station's heating system. Meanwhile, when the process cooling load Q1 is less than the load Q3 of the steam-type lithium bromide unit, the chilled water supply pump 1 and the chilled water return pump 1 are started to supply cooling for the process cooling load; when the process cooling load Q1 is greater than the load Q3 of the steam-type lithium bromide unit, electric valves g, i and j are opened to start the electric refrigeration unit, chilled water supply pump 3, chilled water return pump 2, circulating cooling water supply pump and circulating cooling water return pump for cooling.

[0079] During the transitional season, if the process cooling load is lower than the cooling capacity of the cold and heat storage modules, only the cold and heat storage modules are used for cooling; if the process cooling load is higher than the cooling capacity of the cold and heat storage modules, the electric refrigeration unit is started for cooling, and only the electric refrigeration unit is used for cooling after the cooling capacity of the cold and heat storage modules is exhausted.

[0080] During the transition season, if the process cooling load Q1 is less than the load Q3 of the steam-type lithium bromide unit, the steam-type lithium bromide unit will be used for cooling first, and the excess cooling capacity of the steam-type lithium bromide unit will be stored in the cold and heat storage tank; if the process cooling load Q1 is greater than the load Q3 of the steam-type lithium bromide unit, the cold and heat storage tank will be started for cooling. When the cooling capacity of the cold and heat storage tank is used up, the electric refrigeration unit will be started for cooling. The system generates electricity from wind and solar power, and the photovoltaic power generation unit generates electricity. The electrochemical energy storage unit operates in discharge mode, and the electrolyzer section is in operation. Hydrogen is produced and stored in a hydrogen storage tank after passing through a hydrogen separator, hydrogen scrubber, hydrogen cooler, hydrogen purification system, and hydrogen compression system. Oxygen is produced and stored in an oxygen storage tank after passing through an oxygen separator, oxygen scrubber, and oxygen cooler. The hydrogen pressure regulating station, air compressor, combustion chamber, gas turbine, steam hot water waste heat boiler, steam turbine, and steam-type lithium bromide unit are in operation. When the process cooling load Q1 < the steam-type lithium bromide unit load Q3, electric valves a and b are opened to start the cooling system. Chilled water supply pump 1, chilled water return pump 1, and chilled water storage pump supply cooling for the process cooling load, with excess cooling capacity stored in the storage tank. When the process cooling load Q1 > the load Q3 of the steam-type lithium bromide unit, the electric valve b and the chilled water storage pump are closed, the electric valve f is opened, and the chilled water supply pump 2 is started to supply cooling using the storage tank. After the cooling capacity of the storage tank is used up, the electric valve f and the chilled water supply pump 2 are closed, and then the electric valves g, i, and j are opened to start the electric refrigeration unit, chilled water supply pump 3, chilled water return pump 2, circulating cooling water supply pump, and circulating cooling water return pump for cooling.

[0081] The cooling and heating strategy is implemented seasonally under the pure hydrogen non-power generation operation mode. First, during the cooling season, heating season, and transitional season, steam-type lithium bromide turbines (driven by waste heat from the pure hydrogen combined power generation system) are prioritized to meet cooling load or auxiliary heating needs, maximizing the recovery and utilization of waste heat generated during power generation (avoiding waste of high-temperature flue gas waste heat). Compared to directly relying on electric cooling or independent gas heating, this significantly reduces additional energy consumption and improves overall energy efficiency. Second, when the lithium bromide turbines have excess load, excess cooling or heating energy is stored in cold and heat storage tanks. This provides temporary energy buffering and allows for priority use of cold and heat storage tanks to supplement energy when the load exceeds the capacity of the lithium bromide turbines. This reduces the start-up frequency of electric cooling units, lowers electricity consumption and operating costs, and avoids damage caused by frequent equipment start-ups and shutdowns. Furthermore, the electrochemical energy storage unit, operating in discharge mode, can supplement potential power fluctuations from wind and solar power generation. Combined with the continuous production and storage of hydrogen and oxygen by the electrolyzer, this ensures uninterrupted hydrogen production, balancing energy supply and demand with the utilization of hydrogen resources. In addition, the strategy dynamically adjusts valve and pump start-up and shutdown and equipment coordination logic based on seasonal energy consumption characteristics (e.g., focusing on building and process cooling needs during the cooling season, balancing heating and process cooling needs during the heating season, and focusing only on process cooling needs during the transition season). This accurately matches the actual energy load in each season while ensuring a stable supply of energy for the hydrogen production process and buildings, avoiding energy interruptions due to load mismatch. Overall, this improves the system's operational stability, economic efficiency, and renewable energy absorption efficiency.

[0082] Step 405: In the pure hydrogen combined power generation operation mode, implement the pure hydrogen combined power generation cooling and heating strategy.

[0083] In some embodiments, during the cooling season, if the sum of the process cooling load and the cooling load of the hydrogen production station cooling system is lower than the cooling capacity of the waste heat utilization module, the waste heat utilization module will independently provide cooling and store the remaining cooling capacity in the cold and heat storage module; if the sum of the process cooling load and the cooling load of the hydrogen production station cooling system is higher than the cooling capacity of the waste heat utilization module, the cold and heat storage module will be controlled to release the cooling capacity, and the electric cooling device will be started to supplement the cooling after the cooling capacity is exhausted.

[0084] During the cooling season, when the sum of the process cooling load Q1 and the cooling load Q2 of the hydrogen production station cooling system (Q1 + Q2 < cooling load Q4 of the cold and heat storage tanks) is less than the cooling load Q4 of the cold and heat storage tanks, only the cold and heat storage tanks are activated for cooling. When Q1 + Q2 > the cooling load Q4 of the cold and heat storage tanks, the electric refrigeration units are activated for cooling. When the cold water in the cold storage tanks is depleted, only the electric refrigeration units are used for cooling. Specifically, the wind and solar power generation system and photovoltaic power generation unit generate electricity, the electrochemical energy storage unit is in charging mode, the booster station transmits excess electricity to the grid, all electrolyzers are operating, hydrogen is produced and stored in hydrogen storage tanks after passing through a hydrogen separator, hydrogen scrubber, hydrogen cooler, hydrogen purification system, and hydrogen compression system, and oxygen is produced and stored in oxygen storage tanks after passing through an oxygen separator, oxygen scrubber, and oxygen cooler. The hydrogen pressure regulating station, air compressor, combustion chamber, gas turbine, steam hot water waste heat boiler, steam turbine, and steam-type lithium bromide unit are not operating. When Q1 + Q2 < When the cold storage tank is under a cooling load of Q4, only electric valves h, b, and f are opened to start the chilled water supply pump 2 and the chilled water return pump 1, utilizing the cold storage tank for cooling. When Q1 + Q2 > the cold storage tank's cooling load Q4, electric valves g, i, and j are opened to start the electric refrigeration unit, chilled water supply pump 3, chilled water return pump 2, circulating cooling water supply pump, and circulating cooling water return pump for cooling. When the chilled water in the cold storage tank is depleted, electric valves b and f and the chilled water supply pump 2 are closed, and only the electric refrigeration unit is used for cooling.

[0085] During the heating season, if the heat load of the hydrogen production station's heating system is lower than the heating capacity of the waste heat utilization module, the waste heat utilization module will provide heat and store the remaining heat in the cold and heat storage module; if the heat load of the hydrogen production station's heating system is higher than the heating capacity of the waste heat utilization module, the waste heat utilization module and the cold and heat storage module will be controlled to provide heat together; and the waste heat utilization module will be used in conjunction with the electric chiller for cooling.

[0086] During the heating season, priority is given to using cold and hot storage tanks for heating until the hot water in the tanks is used up; simultaneously, electric refrigeration units are used for process cooling loads. This involves wind and solar power generation systems, photovoltaic power generation units generating electricity, electrochemical energy storage units in charging mode, a booster station supplying excess electricity to the grid, all electrolyzers operating, producing hydrogen which is then processed through a hydrogen separator, hydrogen scrubber, hydrogen cooler, hydrogen purification system, and hydrogen compression system before being stored in a hydrogen storage tank; producing oxygen which is processed through an oxygen separator, oxygen scrubber, and oxygen cooler before being stored in an oxygen storage tank. Other components include a hydrogen pressure regulating station, air compressor, combustion chamber, gas turbine, steam-hot water waste heat boiler, steam turbine, and steam-type bromine... The lithium-ion chiller units are not in operation. Only electric valves c, e, g, i, and j are opened to start the heating water supply pump 2, heating water return pump, electric chiller unit, chilled water supply pump 3, chilled water return pump 2, circulating cooling water supply pump, and circulating cooling water return pump. The cold and heat storage tanks are used for heating, and the electric chiller unit is used for cooling. When the hot water in the cold and heat storage tanks is used up, electric valves e and c, heating water supply pump 2, and heating water return pump are closed. Only the electric chiller unit provides cooling for the process cooling load.

[0087] During the transition season, if the process cooling load is lower than the cooling capacity of the waste heat utilization module, the waste heat utilization module will prioritize cooling and store the remaining cooling capacity in the cold and heat storage module; if the process cooling load is higher than the cooling capacity of the waste heat utilization module, the cold and heat storage module will release the cooling capacity, and the electric refrigeration unit will be started to supplement the cooling after the cooling capacity is exhausted.

[0088] During the transition season, when the process cooling load Q1 < the cooling load of the cold and heat storage tanks Q4, only the cold and heat storage tanks are activated for cooling; when Q1 > the cooling load of the cold and heat storage tanks Q4, the electric refrigeration units are activated for cooling; when the cold water in the cold storage tanks is depleted, only the electric refrigeration units are used for cooling. That is, the wind and solar power generation system and photovoltaic power generation unit generate electricity, the electrochemical energy storage unit is in charging mode, the booster station transmits excess electricity to the grid, all electrolyzers are operating, hydrogen is produced and stored in hydrogen storage tanks after passing through a hydrogen separator, hydrogen scrubber, hydrogen cooler, hydrogen purification system, and hydrogen compression system, and oxygen is produced and stored in oxygen storage tanks after passing through an oxygen separator, oxygen scrubber, and oxygen cooler. The hydrogen pressure regulating station, air compressor, combustion chamber, gas turbine, steam hot water waste heat boiler, steam turbine, and steam-type lithium bromide unit are all not operating. When Q1 + Q When the cold load of the cold storage tank is Q4, only electric valves b and f are opened to start the chilled water supply pump 2 and the chilled water return pump 1, using the cold storage tank for cooling. When Q1+Q2> the cold load of the cold storage tank is Q4, electric valves g, i and j are opened to start the electric refrigeration unit, chilled water supply pump 3, chilled water return pump 2, circulating cooling water supply pump and circulating cooling water return pump for cooling. When the cold water in the cold storage tank is used up, electric valves b and f and chilled water supply pump 2 are closed, and only the electric refrigeration unit is used for cooling.

[0089] The hydrogen power generation module's related equipment (hydrogen pressure regulating station, air compressor, combustion chamber, etc.) remains inactive throughout the entire process, avoiding unnecessary hydrogen combustion consumption and the additional energy consumption caused by equipment idling, effectively reducing system operating costs. During the cooling season, heating season, and transitional season, cold and heat storage tanks are prioritized to meet cooling and heating demands, significantly reducing the start-up frequency of electric chiller units and additional heating equipment. This reduces electricity consumption while balancing fluctuations in cooling and heating demands through the load buffering effect of the cold and heat storage tanks, avoiding energy waste. Simultaneously, wind and solar power generation and energy storage modules continuously generate electricity, the electrochemical energy storage unit is in charging mode, and excess electricity is fed into the grid via a booster station. The grid can maximize the absorption of excess electricity generated by wind and solar power, reduce the phenomenon of "wind and solar curtailment", and improve the utilization rate of renewable energy. The electrolyzer can efficiently convert excess wind and solar power into hydrogen and oxygen and store them in hydrogen and oxygen storage tanks, realizing the multi-form retention and resource utilization of energy. In addition, the strategy dynamically adapts the cooling and heating logic according to the season, adjusts the start-up and shutdown of equipment and valve pump control according to the characteristics of cooling and heating demand in different seasons, ensures that the cooling load of hydrogen production process and the cooling and heating demand of buildings are always stably met, avoids power supply interruption due to load mismatch, and improves the overall stability, economy and comprehensive energy utilization efficiency of the system operation.

[0090] The various numerical designations such as "first," "second," etc., used in this application are merely for ease of description and are not intended to limit the scope of the embodiments of this application, nor do they indicate the order of events.

[0091] At least one in this application can also be described as one or more, and multiple can be two, three, four or more, and this application does not impose any limitation. In the embodiments of this application, for a technical feature, the technical features in that technical feature are distinguished by "first", "second", "third", "A", "B", "C" and "D", and there is no order or size among the technical features described by "first", "second", "third", "A", "B", "C" and "D".

[0092] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this application can be achieved, and this is not limited herein.

[0093] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A high-efficiency integrated wind, solar, hydrogen storage, and fuel gas energy supply system, characterized in that, include: Wind and solar power generation and energy storage modules, hydrogen and oxygen production modules, hydrogen power generation modules, waste heat utilization modules, cold and heat storage modules, and operation control modules; The operation control module is configured as follows: The system monitors the output power of the wind and solar power generation and energy storage module and the hydrogen production power of the hydrogen and oxygen production module in real time, controls the charging and discharging process of the electrochemical energy storage module based on the power deviation value, and schedules the transmission or extraction of electrical energy to the grid. Based on the process cold load and heat load data of the hydrogen and oxygen production module, the operating status of the hydrogen power generation module is dynamically adjusted. The waste heat utilization module is used to recover the high-temperature waste heat generated by hydrogen power generation through start-stop control, so as to realize the cascade utilization of cooling and heating, and simultaneously operate the cold and heat storage module to store or release cold and heat energy. Based on seasonal external load characteristics, the operating priority sequence of the waste heat utilization module, the cold and heat storage module, and the electric refrigeration device is set, and the energy supply is switched when the load fluctuates to optimize the overall energy efficiency and economy of the system.

2. The high-efficiency wind-solar-hydrogen storage and combustion integrated energy supply system according to claim 1, characterized in that, When the power generation of the wind and solar power generation and energy storage module is greater than the hydrogen production power of the hydrogen and oxygen production module, the operation control module controls the electrochemical energy storage module to enter the charging mode and feeds the remaining electrical energy into the power grid through the step-up substation.

3. The high-efficiency wind-solar-hydrogen storage and combustion integrated energy supply system according to claim 2, characterized in that, Also includes: During the cooling season, when the operation control module detects that the sum of the process cooling load and the cooling load of the hydrogen production station cooling system is lower than the cooling capacity of the cold and heat storage module, the cold and heat storage module will provide cooling independently; when the sum of the process cooling load and the cooling load of the hydrogen production station cooling system is higher than the cooling capacity of the cold and heat storage module, the electric cooling device will be started to provide cooling, and the electric cooling device will be used only for cooling after the cooling capacity of the cold and heat storage module is exhausted. During the heating season, the operation control module utilizes the cold and heat storage modules to provide heat and activates the electric refrigeration unit to provide cooling for the process cooling load. When the operation control module is running during the transition season, if it detects that the process cooling load is lower than the cooling capacity of the cold and heat storage module, it will only use the cold and heat storage module for cooling; if the process cooling load is higher than the cooling capacity of the cold and heat storage module, it will start the electric cooling device for cooling, and after the cooling capacity of the cold and heat storage module is exhausted, it will only use the electric cooling device for cooling.

4. The high-efficiency wind-solar-hydrogen storage and combustion integrated energy supply system according to claim 1, characterized in that, When the power generation of the wind and solar power generation and energy storage module is less than the hydrogen production power of the hydrogen and oxygen production module, the operation control module controls the electrochemical energy storage module to enter the discharge mode, and at the same time starts the hydrogen power generation module to perform peak power generation.

5. The high-efficiency wind-solar-hydrogen storage and combustion integrated energy supply system according to claim 4, characterized in that, Also includes: During the cooling season, when the operation control module detects that the sum of the process cooling load and the cooling load of the hydrogen production station cooling system is lower than the cooling capacity of the waste heat utilization module, the waste heat utilization module independently supplies cooling and stores the remaining cooling capacity in the cold and heat storage module; when the sum of the process cooling load and the cooling load of the hydrogen production station cooling system is higher than the cooling capacity of the waste heat utilization module, the cold and heat storage module is controlled to release the cooling capacity, and the electric cooling device is started to supplement the cooling after the cooling capacity is exhausted. During the heating season, when the operation control module detects that the heat load of the hydrogen production station's heating system is lower than the heating capacity of the waste heat utilization module, the waste heat utilization module supplies heat and stores the remaining heat in the cold and heat storage module; when the heat load of the hydrogen production station's heating system is higher than the heating capacity of the waste heat utilization module, the module controls the waste heat utilization module and the cold and heat storage module to supply heat together; and the waste heat utilization module and the electric chiller work together to provide cooling. When the operation control module is running during the transition season, if it detects that the process cooling load is lower than the cooling capacity of the waste heat utilization module, the waste heat utilization module will prioritize cooling and store the remaining cooling capacity in the cold and heat storage module. When the process cooling load is higher than the cooling capacity of the waste heat utilization module, the cold and heat storage module will be controlled to release the cooling capacity, and the electric refrigeration device will be started to supplement the cooling after the cooling capacity is exhausted.

6. The high-efficiency wind-solar-hydrogen storage and combustion integrated energy supply system according to claim 1, characterized in that, The operation control module is also configured to: The remaining capacity of the electrochemical energy storage module is monitored. When the remaining capacity is lower than a preset minimum threshold, the discharge circuit of the electrochemical energy storage module is blocked and the system is switched to purchase power from the grid to ensure continuous operation of the system.

7. An operation method for a high-efficiency integrated wind-solar-hydrogen storage and combustion energy supply system, characterized in that, The method is applied to the high-efficiency wind-solar-hydrogen storage and combustion integrated energy supply system as described in any one of claims 1-6, comprising: The power generation of the wind and solar power generation and energy storage modules is monitored and compared with the hydrogen production power of the hydrogen production and oxygen production modules. The system operation mode is dynamically switched according to the comparison results. Based on the operating mode, and taking into account the seasonal load characteristics of the cooling season, heating season, and transition season, the operation control module executes preset cooling and heating strategies to coordinate the start-up and shutdown of multiple devices and energy storage and utilization.

8. The operation method of the high-efficiency wind-solar-hydrogen storage and combustion integrated energy supply system according to claim 7, characterized in that, The system monitors and compares the power generation of the wind and solar power generation and energy storage module with the hydrogen production power of the hydrogen and oxygen production module, and dynamically switches the system operation mode based on the comparison results, including: Monitor and compare the power generation of the wind and solar power generation and energy storage modules with the hydrogen production power of the hydrogen and oxygen production modules; When the power generation is greater than the hydrogen production, the operating mode is switched to a pure hydrogen non-power generation operation mode. The pure hydrogen non-power generation operation mode includes controlling the electrochemical energy storage module to enter the charging mode and feeding the remaining electrical energy into the power grid through the step-up substation. When the power generation is less than the hydrogen production, the operating mode is switched to a pure hydrogen combined power generation operation mode. The pure hydrogen combined power generation operation mode includes controlling the electrochemical energy storage module to enter the discharge mode and simultaneously starting the hydrogen power generation module for power generation peak shaving.

9. The operation method of the high-efficiency wind-solar-hydrogen storage and combustion integrated energy supply system according to claim 7, characterized in that, The step, based on the seasonal load characteristics of the cooling season, heating season, and transition season, and according to the operating mode, executes a preset cooling and heating strategy through the operation control module, including: In the pure hydrogen non-power generation operation mode, a pure hydrogen non-power generation cooling and heating strategy is implemented; The pure hydrogen non-power generation cooling and heating strategy includes: During the cooling season, if the sum of the process cooling load and the cooling load of the hydrogen production station cooling system is lower than the cooling capacity of the cold and heat storage module, the cold and heat storage module will provide cooling independently; if the sum of the process cooling load and the cooling load of the hydrogen production station cooling system is higher than the cooling capacity of the cold and heat storage module, the electric cooling device will be started for cooling, and the electric cooling device will be used for cooling only after the cooling capacity of the cold and heat storage module is exhausted. During the heating season, the cold and heat storage modules are used for heating, and the electric refrigeration unit is started to provide cooling for the process cooling load. During the transitional season, if the process cooling load is lower than the cooling capacity of the cold and heat storage module, only the cold and heat storage module is used for cooling; if the process cooling load is higher than the cooling capacity of the cold and heat storage module, the electric refrigeration device is started for cooling, and only the electric refrigeration device is used for cooling after the cooling capacity of the cold and heat storage module is exhausted.

10. The operation method of the high-efficiency wind-solar-hydrogen storage and combustion integrated energy supply system according to claim 7, characterized in that, The step, based on the seasonal load characteristics of the cooling season, heating season, and transition season, and according to the operating mode, executes a preset cooling and heating strategy through the operation control module, including: Under the pure hydrogen combined power generation operation mode, a pure hydrogen combined power generation cooling and heating strategy is implemented; The pure hydrogen combined power generation, cooling, and heating strategy includes: During the cooling season, if the sum of the process cooling load and the cooling load of the hydrogen production station cooling system is lower than the cooling capacity of the waste heat utilization module, the waste heat utilization module will independently provide cooling and store the remaining cooling capacity in the cold and heat storage module; if the sum of the process cooling load and the cooling load of the hydrogen production station cooling system is higher than the cooling capacity of the waste heat utilization module, the cold and heat storage module will be controlled to release the cooling capacity, and the electric cooling device will be started to supplement the cooling after the cooling capacity is exhausted. During the heating season, if the heat load of the hydrogen production station's heating system is lower than the heating capacity of the waste heat utilization module, the waste heat utilization module will provide heat and store the remaining heat in the cold and heat storage module; if the heat load of the hydrogen production station's heating system is higher than the heating capacity of the waste heat utilization module, the waste heat utilization module and the cold and heat storage module will be controlled to provide heat together; and the waste heat utilization module will be used in conjunction with the electric chiller for cooling. During the transition season, if the process cooling load is lower than the cooling capacity of the waste heat utilization module, the waste heat utilization module will prioritize cooling and store the remaining cooling capacity in the cold and heat storage module; if the process cooling load is higher than the cooling capacity of the waste heat utilization module, the cold and heat storage module will be controlled to release the cooling capacity, and the electric refrigeration device will be started to supplement the cooling after the cooling capacity is exhausted.

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