Hydrogen-electricity-heat coupling system based on multiple water electrolysis hydrogen production technologies

Abstract

The invention discloses a hydrogen-electricity-heat coupling system based on various water electrolysis hydrogen production technologies. The system comprises a wind-light fluctuating energy output module, a heat / cold storage module, a wind-light side electricity conversion / energy storage module, a water electrolysis hydrogen production module, a hydrogen / oxygen storage module, a hydrogen fuel cell power generation module, a load side electricity energy storage module and a pure water treatment module. According to the system, coupling efficient utilization and storage of multiple energy forms of electric energy, heat energy and hydrogen energy with wind / light fluctuating energy as an initial energy supply end are achieved, and a brand new solution is provided for application of clean energy. The AWEamp is used for the AWEamp; pEMECamp, PEMECamp; the collaborative output and operation scheduling strategy of the SOEC hybrid hydrogen production system has important significance. According to the wind / light fluctuation energy electricity-heat-hydrogen coupling system integrated master control platform, a system optimal guarantee mechanism is established, so that balance of various kinds of energy in the system is achieved, and optimal control over system operation scheduling is provided.

Description

Technical Field

[0001] The present invention relates to the field of hydrogen energy and clean energy technology, and in particular to a hydrogen-electric-thermal coupling system based on a variety of water electrolysis hydrogen production technologies. Background Art

[0002] The hydrogen-electric-thermal coupling system with complementary wind-solar fluctuating energy refers to an energy network that converts hydrogen energy, electric energy and thermal energy into each other and works together efficiently. It converts clean energy such as wind and light into hydrogen energy storage during low electricity consumption, and generates electricity through hydrogen fuel cells during peak electricity consumption, which can achieve peak-shaving and valley-filling of wind-solar fluctuating energy. Hydrogen-electricity-heat synergy can effectively solve the contradiction between high-proportion intermittent and fluctuating energy and rigid loads while giving full play to their respective advantages and promoting the consumption of clean energy, and ensure the safe and stable operation of new clean power / thermal systems.

[0003] At present, the main water electrolysis hydrogen production technology routes coupled with wind and solar fluctuating energy sources include alkaline water electrolysis hydrogen production (ALK), proton exchange membrane water electrolysis hydrogen production (PEMEC) and solid oxide water electrolysis hydrogen production (SOEC). The three technologies have their own advantages and disadvantages:

[0004] ALK is the most mature hydrogen production technology at this stage, with obvious advantages in cost, life, accuracy and reliability, but it has a long start-stop response time, low current density, and is weak in coupling with renewable energy and achieving efficient and stable operation under fluctuating power input;

[0005] PEMEC has a faster startup time, a five-fold increase in current density, and is more flexible in operation, which is conducive to rapid load changes and is well matched with offshore wind power, which has strong volatility and intermittency. In addition, the electrolyzer has a compact structure, a smaller footprint, a small size, a fast response speed, and is more environmentally friendly, but the cost is relatively high, and its key components and precious metal applications have shortcomings;

[0006] SOEC has the highest efficiency, but has a high operating temperature (700-900℃), a short lifespan, and is inconvenient to start and stop the electrolyzer. It is suitable for use in specific occasions with external heating, and can effectively utilize steam to further improve the economic efficiency of hydrogen production.

[0007] Electricity-hydrogen coupling systems based on the complementary fluctuating energy sources of wind and solar power are common, but electricity-hydrogen-heat coupling systems that consider the comprehensive utilization of solar and thermal energy are relatively rare; and it is difficult to simultaneously regulate the three hydrogen production systems of ALK, PEMEC, and SOEC in the existing solutions.

[0008] Wind and solar fluctuating energy has the disadvantages of intermittent and random volatility. The coupling with hydrogen production technology involves the energy conversion of wind / solar-electricity-hydrogen-heat, which significantly increases the complexity of the entire system and also puts forward higher requirements for the real-time control of the entire system. The existing coupling system control scheme is mainly based on distributed control of each sub-module, but lacks a unified and efficient coordinated control method for the entire system and a dynamic adaptive optimization control strategy, which is not conducive to improving the energy efficiency and economy of the system. Summary of the invention

[0009] In order to overcome the shortcomings and deficiencies of the prior art, the present invention provides a hydrogen-electric-thermal coupling system based on a variety of water electrolysis hydrogen production technologies. The system includes: a wind-solar fluctuating energy output module, a heat storage / cold module, a wind-solar side electric conversion / energy storage module, a water electrolysis hydrogen production module, a hydrogen / oxygen storage module, a hydrogen fuel cell power generation module, a load side electric energy storage module and a pure water treatment module;

[0010] The wind-solar fluctuating energy output module is used to convert the fluctuating solar energy in the photovoltaic power generation system into electrical energy, and connect it to the DC bus terminal through the DCDC DC converter; the wind power generation system converts the fluctuating wind energy into electrical energy, and connects it to the DC bus terminal through the ACDC inverter; the solar heating system converts the fluctuating solar energy into thermal energy, and stores it in the heat storage / cold storage module through process processing, so as to provide heat or cold for the load side;

[0011] The DCDC converter in the wind-solar side power conversion / energy storage module is used to directly provide a portion of the electric energy provided by the wind-solar fluctuating energy output module to the water electrolysis hydrogen production module, and the other portion of the electric energy is stored in the energy storage battery, which is used for peak and valley smoothing of wind / solar / electric energy and power support when the electric energy required by the hydrogen storage system is insufficient;

[0012] The water electrolysis hydrogen production module converts the electric energy provided by the wind / solar power generation system into hydrogen and oxygen, and includes three types of hydrogen production modules: an alkaline water electrolysis system, a proton exchange membrane water electrolysis system, and a high-temperature solid oxide water electrolysis system. According to the characteristics of different hydrogen production technologies, the proton exchange membrane water electrolysis system utilizes the wind / solar / electric energy directly provided by the DCDC direct current converter, and the electric energy supply of the alkaline water electrolysis system and the high-temperature solid oxide water electrolysis system is provided by the wind / solar / electric energy provided by the energy storage battery;

[0013] The hydrogen / oxygen storage module includes a hydrogen storage system and an oxygen storage system, which are used to store hydrogen and oxygen generated by the water electrolysis hydrogen production module, wherein a part of the hydrogen storage system is used by the hydrogen fuel cell module, and the other part of the hydrogen storage system and the oxygen storage system are used by the load side hydrogen and oxygen;

[0014] The hydrogen fuel cell power generation module is used to convert the hydrogen provided by the water electrolysis hydrogen production module into electrical energy;

[0015] The load-side electric energy storage module is used to store the electric energy provided by the hydrogen fuel cell power generation module, a part of which is provided to the pure water treatment module, and the other part is used for the load-side electricity;

[0016] The pure water treatment module is used to provide the product water output by the hydrogen fuel cell power generation system and the pure water through the pure water treatment process via electric energy to the electrolytic water system for electrolytic hydrogen production.

[0017] Furthermore, the system controls and regulates the overall system through the integrated master control platform of wind / solar fluctuating energy electricity-heat-hydrogen coupling system, including:

[0018] The integrated master control platform uses the wind-solar maximum power point tracking complementary control strategy to track the real-time power demand of the hydrogen production system fed back by the voltage converter control system to regulate the photovoltaic or wind power AGC / AVC power or voltage output, and adjust the system to make the wind-solar power generation system operate in the maximum output power and efficiency point;

[0019] The hydrogen production control system is used to distribute and adjust the output sequence and duration of three types of water electrolysis hydrogen production equipment, namely, the alkaline water electrolysis system, the proton exchange membrane water electrolysis system, and the high-temperature solid oxide water electrolysis system, according to the real-time demand for hydrogen / oxygen production and the real-time value of wind and solar power fed back by the hydrogen / oxygen storage control system, and to absorb the power, and formulate a rotation optimization control strategy for the electrolysis equipment;

[0020] The hydrogen / oxygen storage control system is used to regulate the hydrogen / oxygen supply rate of the hydrogen / oxygen storage system according to the hydrogen / oxygen demand on the hydrogen / oxygen load side and the hydrogen fuel cell system, and to feed back the demand to the hydrogen production system in real time when the reserves are insufficient.

[0021] Furthermore, the system controls and regulates the overall system through the integrated master control platform of the wind / solar fluctuating energy electricity-heat-hydrogen coupling system, and also includes:

[0022] The fuel cell control system is used for the energy storage control system to adjust the output power and operation mode of the hydrogen fuel cell according to the real-time feedback data of the user-side power demand and the power demand of the pure water control system;

[0023] The pure water control system is used to adjust the water production rate and working mode of the pure water system according to the real-time feedback data of the electrolysis water demand of the hydrogen production system, and feed back the power demand to the energy storage control system;

[0024] The solar heating electric control system is used to adjust the solar heating power and system working mode in real time according to the feedback from the heat storage control system;

[0025] The heat storage control system is used to adjust the output power of the heat storage / cooling system in real time according to the heat / cooling demand feedback data of the load side and the heat feedback data of the high-temperature solid oxide water electrolysis system hydrogen production system.

[0026] Furthermore, the system is implemented through an integrated control method, including:

[0027] The electric energy storage monitoring system determines whether P*n>Ps based on the power P*n fed back by the power demand and the reserve power Ps currently monitored by the energy storage system: if so, the fuel cell system is controlled in the rated power generation mode and the energy storage system is controlled in the charging mode and enters the next step; otherwise, the electric energy storage system is controlled in the discharge mode according to the load side demand;

[0028] The hydrogen / oxygen storage monitoring system will provide feedback F*H based on the hydrogen / oxygen flow demand. 2 / F*O 2 The current monitoring reserve FH of the hydrogen / oxygen storage system 2 / FO 2 Judge F*H 2 >FH 2 or F*O 2 >FO 2 Is it established: If yes, the hydrogen production system is controlled in the rated electrolysis mode, the hydrogen / oxygen storage system is controlled in the supplementary mode, and the pure water production system is controlled in the water production mode and enters the next step. If no, the hydrogen / oxygen storage system is controlled in the gas supply mode according to the load side demand;

[0029] The proton exchange membrane water electrolysis system is controlled in the rated electrolysis mode and the photovoltaic / wind power system is controlled in the rated power generation mode according to the maximum power point tracking complementary strategy;

[0030] Furthermore, the system is implemented by an integrated control method, and also includes:

[0031] The electric energy storage monitoring system is based on the feedback power P required for the rated operation of the alkaline electrolysis water system. ALK and the current battery charge value P BMS Judge P ALK >P BMS Is it established: If yes, the photovoltaic / wind power system is controlled in power generation mode according to the wind-solar maximum power tracking complementary strategy and the BMS system is controlled in charging mode and enters the next step. If no, the BMS system controls the discharge amount according to the power demand of the alkaline water electrolysis system;

[0032] The electric energy storage monitoring system is based on the feedback power P required for the rated operation of the high-temperature solid oxide water electrolysis system. SOEC and the current battery charge value P BMS Judge P SOEC >P BMS The heat storage monitoring system is based on the feedback heat Q required for the rated operation of the high-temperature solid oxide water electrolysis system. SOEC Determine Q with the current heat of the heat storage system QS SOEC>Whether QS is established: If yes, the photovoltaic / wind power system is controlled in the rated power generation mode according to the wind-solar maximum power point tracking complementary strategy and the BMS system is controlled in the charging mode and enters the next step. If no, the BMS system controls the discharge amount according to the power demand of the alkaline water electrolysis system;

[0033] The heat storage monitoring system monitors and determines whether Q*n>Qs based on the heat energy demand feedback Q*n and the current reserve heat Qs of the heat storage system: if so, the solar heating system is controlled in the rated working mode and the heat storage system is controlled in the heat storage mode and proceeds to the next step; otherwise, the solar heating system is controlled in the rated working mode and the heat storage system is controlled in the heating mode according to the load side demand.

[0034] Beneficial effects:

[0035] The purpose of the present invention is to provide a hydrogen-electric-thermal coupling system based on a variety of water electrolysis hydrogen production technologies, which realizes the coupling and efficient utilization and storage of multiple energy forms such as electric energy, thermal energy and hydrogen energy with wind / solar fluctuating energy as the initial energy supply end, and provides a new solution for the application of clean energy.

[0036] The integrated control method of the hydrogen-electric-thermal coupling system based on multiple water electrolysis hydrogen production technologies described in the present invention can realize real-time monitoring and dynamic control of the long-term stable operating state between the slowly changing process (electrolysis hydrogen production system / hydrogen fuel cell system) and the fast response demand (wind and solar fluctuating energy) under strong ripple / fluctuating power input such as wind / solar energy, which can ensure that the system can stably and reliably meet the load demand, realize efficient utilization of energy, multi-energy synergy and reasonable distribution of load, and has high operating efficiency and economic benefits, which is of great significance to the coordinated output and operation scheduling strategy of the AWE&PEMEC&SOEC hybrid hydrogen production system.

[0037] The integrated master control platform of the wind / solar fluctuating energy electricity-heat-hydrogen coupling system described in the present invention includes a system self-learning optimization configuration strategy, an efficient and stable edge collaborative adaptive control strategy, and a system full parameter optimization process control and other high-reliability energy management control strategies for the entire process. It establishes a system optimal guarantee mechanism to achieve a balance of various types of energy within the system and provide optimal control of system operation scheduling. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a system architecture diagram of the present invention;

[0039] Figure 2 It is a system control flow architecture diagram of the present invention;

[0040] Figure 3 It is a flow chart of the integrated control method of the present invention;

[0041] Figure 4This is a system grid-connected mode architecture diagram of the present invention. DETAILED DESCRIPTION

[0042] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other. The present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0043] The main purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art and disclose a hydrogen-electric-thermal coupling system based on a variety of water electrolysis hydrogen production technologies.

[0044] The invention proposes the coupled efficient utilization and storage of multiple energy forms such as electric energy, thermal energy and hydrogen energy with wind / solar fluctuating energy as the initial energy supply, which provides a new solution for the application of clean energy. While realizing the absorption of wind and solar power, it ensures the safe, efficient and reliable operation of the entire wind / solar-electricity-heat-hydrogen integrated energy system.

[0045] The integrated control method of the hydrogen-electric-thermal coupling system based on a variety of water electrolysis hydrogen production technologies proposed in the present invention aims to ensure that the system can stably and reliably meet the load demand, realize efficient energy utilization, multi-energy synergy and reasonable load distribution, with the ultimate goal of optimizing configuration, stability of process control and life extension control management, to build a more reasonable, efficient and stable energy management strategy.

[0046] The overall system architecture of the hydrogen-electric-thermal coupling system based on various water electrolysis hydrogen production technologies is shown below: Figure 1 , including wind and solar fluctuating energy output module, heat / cold storage module, wind and solar side electricity conversion / energy storage module, water electrolysis hydrogen production module, hydrogen / oxygen storage module, hydrogen fuel cell power generation module, load side electricity storage module and pure water treatment module. The specific implementation plan includes the following steps:

[0047] The photovoltaic power generation system in the wind-solar fluctuating energy output module converts fluctuating solar energy into electrical energy, and connects it to the DC bus terminal through the DCDC converter. The wind power generation system converts fluctuating wind energy into electrical energy, and connects it to the DC bus terminal through the ACDC inverter. The solar heating system converts fluctuating solar energy into thermal energy, and stores it in the heat storage / cold storage system through process processing to provide heat or cold for the load side.

[0048] The DCDC converter in the wind-solar power conversion / energy storage module is used to directly provide part of the power provided by the wind-solar fluctuating energy output module to the water electrolysis hydrogen production module, and the other part of the power is stored in the energy storage battery, which is used to smooth the peak and valley of wind and solar power and provide power support when the power required by the hydrogen storage system is insufficient;

[0049] The water electrolysis hydrogen production module converts the electric energy provided by the wind / solar power generation system into hydrogen and oxygen, including three types of hydrogen production modules: alkaline water electrolysis system (ALK), proton exchange membrane water electrolysis system (PEMEC), and high-temperature solid oxide water electrolysis system (SOEC). According to the characteristics of different hydrogen production technologies, PEMEC can use wind / photovoltaic energy directly provided by the DCDC DC converter, while the power supply of ALK and SOEC is provided by wind / photovoltaic energy provided by energy storage batteries;

[0050] The hydrogen / oxygen storage module includes a hydrogen storage system and an oxygen storage system, which are used to store hydrogen and oxygen generated by the water electrolysis hydrogen production module, wherein a part of the hydrogen storage system is used by the hydrogen fuel cell module, and the other part of the hydrogen storage system and the oxygen storage system are used by the load side.

[0051] The hydrogen fuel cell power generation module is used to convert the hydrogen provided by the water electrolysis hydrogen production module into electrical energy;

[0052] The load-side electric energy storage module is used to store the electric energy provided by the hydrogen fuel cell power generation module, a part of which is provided to the pure water treatment module, and the other part is used for the load-side electricity;

[0053] The pure water treatment module is used to provide the product water output by the hydrogen fuel cell power generation system and the pure water provided by the electric energy through the pure water treatment process to the electrolysis water system for electrolysis hydrogen production.

[0054] like Figure 2 As shown, the hydrogen-electric-thermal coupling system based on various water electrolysis hydrogen production technologies provided by the present invention controls and adjusts the overall system through an integrated master control platform of a wind / solar fluctuating energy electricity-heat-hydrogen coupling system. The specific implementation scheme includes the following steps:

[0055] The integrated master control platform uses the wind-solar maximum power point tracking complementary control strategy to track the real-time power demand of the hydrogen production system fed back by the voltage converter control system to regulate the photovoltaic or wind power AGC / AVC power or voltage output, and adjust the system to make the wind-solar power generation system operate in the maximum output power and efficiency point;

[0056] The hydrogen production control system is used to distribute and adjust the output sequence and duration of the three types of water electrolysis hydrogen production equipment, ALK, PEMEC, and SOEC, according to the real-time demand for hydrogen / oxygen production fed back by the hydrogen / oxygen storage control system and the real-time value of wind and solar power to absorb power, and formulate an electrolysis equipment rotation optimization control strategy to balance the operating time and output level of each electrolysis equipment unit under different states such as rated power, fluctuating power, and shutdown, so as to improve the life of the electrolysis system and the safety and reliability of hydrogen production;

[0057] The hydrogen / oxygen storage control system is used to regulate the hydrogen / oxygen supply rate of the hydrogen / oxygen storage system according to the hydrogen / oxygen demand on the hydrogen / oxygen load side and the hydrogen fuel cell system, and to feed back the demand to the hydrogen production system in real time when the reserve is insufficient, so as to ensure sufficient supply on the hydrogen / oxygen side;

[0058] The fuel cell control system is used for the energy storage control system to adjust the output power and operation mode of the hydrogen fuel cell according to the real-time feedback data of the user-side power demand and the power demand of the pure water control system;

[0059] The pure water control system is used to adjust the water production rate and working mode of the pure water system according to the real-time feedback data of the electrolysis water demand of the hydrogen production system, and feed back the power demand to the energy storage control system;

[0060] The solar heating electric control system is used to adjust the solar heating power and system working mode in real time according to the feedback from the heat storage control system;

[0061] The heat storage control system is used to adjust the output power of the heat storage / cooling system in real time according to the heat / cooling demand feedback data of the load side and the heat feedback data of the SOEC hydrogen production system.

[0062] like Figure 3 As shown, the hydrogen-electric-thermal coupling system based on various water electrolysis hydrogen production technologies proposed in the present invention is realized by an integrated control method, and the specific implementation method includes the following steps:

[0063] The electric energy storage monitoring system determines whether P*n>Ps based on the power P*n fed back by the power demand and the reserve power Ps currently monitored by the energy storage system: if so, the fuel cell system is controlled in the rated power generation mode and the energy storage system is controlled in the charging mode and enters the next step; otherwise, the electric energy storage system is controlled in the discharge mode according to the load side demand;

[0064] The hydrogen / oxygen storage monitoring system will provide feedback F*H based on the hydrogen / oxygen flow demand. 2 / F*O 2 The current monitoring reserve FH of the hydrogen / oxygen storage system 2 / FO 2 Judge F*H 2 >FH 2 or F*O 2 >FO 2 Is it established: If yes, the hydrogen production system is controlled in the rated electrolysis mode, the hydrogen / oxygen storage system is controlled in the supplementary mode, and the pure water production system is controlled in the water production mode and enters the next step. If no, the hydrogen / oxygen storage system is controlled in the gas supply mode according to the load side demand;

[0065] The PEMEC system is controlled in the rated electrolysis mode and the PV / wind power system is controlled in the rated generation mode according to the maximum power point tracking complementary strategy;

[0066] The electric energy storage monitoring system is based on the feedback power P required for the rated operation of the alkaline electrolysis water system. ALK and the current battery charge value P BMS Judge P ALK >P BMS Is it established: If yes, the photovoltaic / wind power system is controlled in power generation mode according to the wind-solar maximum power tracking complementary strategy and the BMS system is controlled in charging mode and enters the next step. If no, the BMS system controls the discharge amount according to the power demand of the alkaline water electrolysis system;

[0067] The electric energy storage monitoring system is based on the feedback power P required for the rated operation of the high-temperature solid oxide water electrolysis system. SOEC and the current battery charge value P BMS Judge P SOEC >P BMS The heat storage monitoring system is based on the feedback heat Q required for the rated operation of the high-temperature solid oxide water electrolysis system. SOEC Determine Q with the current heat of the heat storage system QS SOEC >Whether QS is established: If yes, the photovoltaic / wind power system is controlled in the rated power generation mode according to the wind-solar maximum power point tracking complementary strategy and the BMS system is controlled in the charging mode and enters the next step. If no, the BMS system controls the discharge amount according to the power demand of the alkaline water electrolysis system;

[0068] The heat storage monitoring system monitors and determines whether Q*n>Qs based on the heat energy demand feedback Q*n and the current reserve heat Qs of the heat storage system: if so, the solar heating system is controlled in the rated working mode and the heat storage system is controlled in the heat storage mode and proceeds to the next step; otherwise, the solar heating system is controlled in the rated working mode and the heat storage system is controlled in the heating mode according to the load side demand.

[0069] In particular, the above-mentioned hydrogen-electric-thermal coupling system based on various water electrolysis hydrogen production technologies is a typical off-grid system. The method described in the invention is also applicable to some scenarios where grid connection is required. The grid-connected system architecture is as follows: Figure 4 shown.

[0070] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", and "fix" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0071] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various equivalent changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Hydrogen-electric-thermal coupling system based on various water electrolysis hydrogen production technologies, characterized by ,The system includes: wind and solar fluctuating energy output module, heat / cold storage module, wind and solar side electricity conversion / energy storage module, water electrolysis hydrogen production module, hydrogen / oxygen storage module, hydrogen fuel cell power generation module, load side electricity storage module and pure water treatment module; The wind-solar fluctuating energy output module is used to convert the fluctuating solar energy in the photovoltaic power generation system into electrical energy, and connect it to the DC bus terminal through the DCDC DC converter; the wind power generation system converts the fluctuating wind energy into electrical energy, and connects it to the DC bus terminal through the ACDC inverter; the solar heating system converts the fluctuating solar energy into thermal energy, and stores it in the heat storage / cold storage module through process processing, so as to provide heat or cold for the load side; The DCDC converter in the wind-solar side power conversion / energy storage module is used to directly provide a portion of the electric energy provided by the wind-solar fluctuating energy output module to the water electrolysis hydrogen production module, and the other portion of the electric energy is stored in the energy storage battery, which is used for peak and valley smoothing of wind / solar / electric energy and power support when the electric energy required by the hydrogen storage system is insufficient; The water electrolysis hydrogen production module converts the electric energy provided by the wind / solar power generation system into hydrogen and oxygen, and includes three types of hydrogen production modules: an alkaline water electrolysis system, a proton exchange membrane water electrolysis system, and a high-temperature solid oxide water electrolysis system. According to the characteristics of different hydrogen production technologies, the proton exchange membrane water electrolysis system uses the wind / solar / electric energy directly provided by the DCDC direct current converter, and the power supply of the alkaline water electrolysis system and the high-temperature solid oxide water electrolysis system is provided by the wind / solar / electric energy provided by the energy storage battery; The hydrogen / oxygen storage module includes a hydrogen storage system and an oxygen storage system, which are used to store hydrogen and oxygen generated by the water electrolysis hydrogen production module, wherein a part of the hydrogen storage system is used by the hydrogen fuel cell module, and the other part of the hydrogen storage system and the oxygen storage system are used by the load side hydrogen and oxygen; The hydrogen fuel cell power generation module is used to convert the hydrogen provided by the water electrolysis hydrogen production module into electrical energy; The load-side electric energy storage module is used to store the electric energy provided by the hydrogen fuel cell power generation module, a part of which is provided to the pure water treatment module, and the other part is used for the load-side electricity; The pure water treatment module is used to provide the product water output by the hydrogen fuel cell power generation system and the pure water through the pure water treatment process via electric energy to the electrolytic water system for electrolytic hydrogen production.

2. The hydrogen-electric-thermal coupling system based on multiple water electrolysis hydrogen production technologies as claimed in claim 1, characterized in that: The system controls and regulates the entire system through the integrated control platform of wind / solar fluctuating energy electricity-heat-hydrogen coupling system, including: The integrated master control platform uses the wind-solar maximum power point tracking complementary control strategy to track the real-time power demand of the hydrogen production system fed back by the voltage converter control system to regulate the photovoltaic or wind power AGC / AVC power or voltage output, and adjust the system to make the wind-solar power generation system operate in the maximum output power and efficiency point; The hydrogen production control system is used to distribute and adjust the output sequence and duration of three types of water electrolysis hydrogen production equipment, namely, the alkaline water electrolysis system, the proton exchange membrane water electrolysis system, and the high-temperature solid oxide water electrolysis system, according to the real-time demand for hydrogen / oxygen production and the real-time value of wind and solar power fed back by the hydrogen / oxygen storage control system, and to absorb the power, and formulate a rotation optimization control strategy for the electrolysis equipment; The hydrogen / oxygen storage control system is used to regulate the hydrogen / oxygen supply rate of the hydrogen / oxygen storage system according to the hydrogen / oxygen demand on the hydrogen / oxygen load side and the hydrogen fuel cell system, and to feed back the demand to the hydrogen production system in real time when the reserves are insufficient.

3. The hydrogen-electric-thermal coupling system based on multiple water electrolysis hydrogen production technologies as claimed in claim 1, characterized in that: The system controls and regulates the entire system through the integrated master control platform of the wind / solar fluctuating energy electricity-heat-hydrogen coupling system, which also includes: The fuel cell control system is used for the energy storage control system to adjust the output power and operation mode of the hydrogen fuel cell according to the real-time feedback data of the user-side power demand and the power demand of the pure water control system; The pure water control system is used to adjust the water production rate and working mode of the pure water system according to the real-time feedback data of the electrolysis water demand of the hydrogen production system, and feed back the power demand to the energy storage control system; The solar heating electric control system is used to adjust the solar heating power and system working mode in real time according to the feedback from the heat storage control system; The heat storage control system is used to adjust the output power of the heat storage / cooling system in real time according to the heat / cooling demand feedback data of the load side and the heat feedback data of the high-temperature solid oxide water electrolysis system hydrogen production system.

4. The hydrogen-electric-thermal coupling system based on multiple water electrolysis hydrogen production technologies as claimed in claim 1, characterized in that: The system is implemented through an integrated control method, including: The electric energy storage monitoring system determines whether P*n>Ps based on the power P*n fed back by the power demand and the reserve power Ps currently monitored by the energy storage system: if so, the fuel cell system is controlled in the rated power generation mode and the energy storage system is controlled in the charging mode and enters the next step; otherwise, the electric energy storage system is controlled in the discharge mode according to the load side demand; The hydrogen / oxygen storage monitoring system determines whether F*H2>FH2 or F*O2>FO2 is established based on the hydrogen / oxygen flow demand feedback F*H2 / F*O2 and the current monitored reserve FH2 / FO2 of the hydrogen / oxygen storage system: if so, the hydrogen production system is controlled in the rated electrolysis mode, the hydrogen / oxygen storage system is controlled in the replenishment mode, and the pure water production system is controlled in the water production mode and enters the next step; otherwise, the hydrogen / oxygen storage system is controlled in the gas supply mode according to the load side demand; The proton exchange membrane water electrolysis system is controlled in the rated electrolysis mode and the photovoltaic / wind power system is controlled in the rated power generation mode according to the maximum power point tracking complementary strategy.

5. The hydrogen-electric-thermal coupling system based on multiple water electrolysis hydrogen production technologies as claimed in claim 1, characterized in that: The system is implemented through an integrated control method, which also includes: The electric energy storage monitoring system is based on the feedback power P required for the rated operation of the alkaline electrolysis water system. ALK and the current battery charge value P BMS Judge P ALK >P BMS Is it established: If yes, the photovoltaic / wind power system is controlled in power generation mode according to the wind-solar maximum power tracking complementary strategy and the BMS system is controlled in charging mode and enters the next step. If no, the BMS system controls the discharge amount according to the power demand of the alkaline water electrolysis system; The electric energy storage monitoring system is based on the feedback power P required for the rated operation of the high-temperature solid oxide water electrolysis system. SOEC and the current battery charge value P BMS Judge P SOEC >P BMS The heat storage monitoring system is based on the feedback heat Q required for the rated operation of the high-temperature solid oxide water electrolysis system. SOEC Determine Q with the current heat of the heat storage system QS SOEC >Whether QS is established: If yes, the photovoltaic / wind power system is controlled in rated power generation mode according to the wind-solar maximum power point tracking complementary strategy and the BMS system is controlled in charging mode and enters the next step. Otherwise, the BMS system controls the discharge amount according to the power demand of the alkaline water electrolysis system; The heat storage monitoring system monitors and determines whether Q*n>Qs based on the heat energy demand feedback Q*n and the current reserve heat Qs of the heat storage system: if so, the solar heating system is controlled in the rated working mode and the heat storage system is controlled in the heat storage mode and proceeds to the next step; otherwise, the solar heating system is controlled in the rated working mode and the heat storage system is controlled in the heating mode according to the load side demand.

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