Hydrogen energy interaction multi-region electro-hydrogen coupling comprehensive energy system

Abstract

The invention discloses a hydrogen energy interaction multi-region electricity-hydrogen coupling comprehensive energy system, and relates to the field of hydrogen energy manufacturing and hydrogen energy application. Photovoltaic power generation equipment is electrically connected with PEM hydrogen production equipment and a national grid line; a power distribution system is arranged on a national power grid line, and the power distribution system is used for performing power distribution on the PEM hydrogen production equipment and the integrated supercharging hydrogen storage equipment; the PEM hydrogen production equipment is communicated with the gas inlet end of the integrated pressurizing hydrogen storage equipment through a hydrogen pipeline; the gas transmission end of the integrated booster is respectively connected with the hydrogen fuel cell and the hydrogen filling machine through a hydrogen pipeline; the hydrogen fuel cell is electrically connected with electric equipment and is communicated with the heating system through a water flow pipeline; the control system is electrically connected with the photovoltaic power generation equipment, the PEM hydrogen production equipment, the integrated pressurizing hydrogen storage equipment and the hydrogen fuel cell respectively; and heat and electricity are generated through the fuel cell, peak regulation is carried out on an electric power system, environment-friendly operation is achieved, and consumption of redundant energy is assisted.

Description

Technical Field

[0001] The present invention relates to the field of hydrogen energy manufacturing and hydrogen energy application, and specifically to a hydrogen energy interactive multi-region electric-hydrogen coupled integrated energy system. Background Art

[0003] Adhere to energy conservation first, and improve the dual control system of total energy consumption and intensity. Increase the proportion of renewable energy utilization, vigorously promote the development of wind power and photovoltaic power generation, and develop hydropower, geothermal energy, ocean energy, hydrogen energy, biomass energy, and solar thermal power generation according to local conditions. Accelerate the research and development and promotion of large-capacity energy storage technology, and improve the power grid's aggregation and transmission capabilities. Increase the supply of clean energy in rural areas and promote the development of biomass energy in rural areas.

[0004] As a clean, efficient, safe and sustainable secondary energy source, hydrogen energy can provide deep decarbonization for traditional industries such as chemical industry, smelting, power fuel, energy storage, and construction. Green hydrogen produced by various renewable energy sources such as solar photovoltaic, wind power, and hydropower is the ultimate energy source that may replace traditional fossil energy. The rapid power modulation characteristics of hydrogen can increase the safety and stability of the power grid, and the energy storage characteristics of hydrogen can play a role in "peak shaving and valley flattening", breaking the bottleneck of renewable energy development. In the future, electricity and hydrogen energy will jointly serve as the terminal form of green energy, and the electric hydrogen energy system will become one of the ways to build a modern energy system.

[0005] Key technologies such as the production, storage, transportation and use of hydrogen energy have not yet formed an integrated construction, resulting in certain risks in the utilization and safety of hydrogen energy, leading to waste of resources, low efficiency in hydrogen energy production, and safety risks during transportation.

[0006] In view of the above problems, the present invention provides a hydrogen energy interactive multi-region electric-hydrogen coupled integrated energy system to solve the above problems. Summary of the invention

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a hydrogen energy interactive multi-regional electric-hydrogen coupling integrated energy system, comprising: photovoltaic power generation equipment, PEM hydrogen production equipment, integrated pressurized hydrogen storage equipment, hydrogen fuel cell, and control system;

[0008] The photovoltaic power generation equipment is electrically connected to the PEM hydrogen production equipment and the national power grid line; a power distribution system is provided on the national power grid line, and the power distribution system is used to distribute electricity to the PEM hydrogen production equipment and the integrated pressurized hydrogen storage equipment;

[0009] The PEM hydrogen production equipment is connected to the gas inlet end of the integrated pressurized hydrogen storage equipment through a hydrogen pipeline, and the integrated pressurized hydrogen storage equipment is used to dry, high-pressure treat and store the hydrogen produced by the PEM hydrogen production equipment;

[0010] The integrated pressurized gas transmission end is provided with an interface, which is connected to the hydrogen fuel cell and the hydrogen filling machine through a hydrogen pipeline and a hydrogen pipeline respectively; the hydrogen fuel cell is electrically connected to the electrical equipment and is connected to the heating system through a water pipeline;

[0011] The control system is electrically connected to the photovoltaic power generation equipment, the PEM hydrogen production equipment, the integrated pressurized hydrogen storage equipment, and the hydrogen fuel cell respectively.

[0012] Further, preferably, the PEM hydrogen production equipment comprises: a deionized water system, a power regulator, and a PEM electrolyzer;

[0013] The water inlet end of the deionized water system is connected to the tap water interface through a water pipeline, and the water outlet end is connected to the water inlet end of the PEM electrolyzer through a water pipeline. The deionized water system is used to process and filter tap water; one end of the power regulator is electrically connected to the photovoltaic power generation equipment and the national grid line, and the other end is electrically connected to the wiring terminal of the PEM electrolyzer. The PEM electrolyzer is connected to the integrated pressurized hydrogen storage device through a hydrogen pipeline.

[0014] Further, preferably, the power regulator switches the power of the photovoltaic power generation equipment and the power distribution system; when the power generation of the photovoltaic power generation equipment is insufficient, the power of the distribution system is mobilized to ensure the normal power demand of the PEM electrolyzer.

[0015] Further, preferably, the integrated pressurized hydrogen storage device comprises: a hydrogen-water separator, a liquid drive pressurization system, and a hydrogen storage bottle;

[0016] The input end of the hydrogen-water separator is connected to the hydrogen output end of the PEM electrolyzer through a hydrogen pipeline, so as to dry the hydrogen; the input end of the liquid drive boosting system is connected to the output end of the hydrogen-water separator through a hydrogen pipeline, so as to boost the pressure of the hydrogen after drying;

[0017] The input end of the hydrogen storage bottle is connected to the output end of the liquid-driven boosting system through a hydrogen pipeline, and is used to store pressurized hydrogen; the output end of the hydrogen storage bottle is provided with a connector, and the connector is connected to the hydrogen fuel cell and the hydrogen filling machine through a hydrogen pipeline.

[0018] Further, preferably, the integrated pressurized hydrogen storage device also includes a monitoring module, and the monitoring module includes: a hydrogen concentration sensor, a flame detector, a temperature sensor, and a lighting device.

[0019] Further, preferably, the hydrogen fuel cell includes: a thermoelectric unit, a control unit, a power adjustment unit, an energy storage unit, a hydrogen leakage detection unit, and a fire protection system;

[0020] The hydrogen inlet of the thermoelectric unit is connected to the hydrogen storage bottle; the energy storage unit is electrically connected to the power transmission end of the thermoelectric unit; the input end of the power regulating unit is electrically connected to the energy storage unit, and the output end is electrically connected to the electrical equipment;

[0021] The hydrogen leakage detection unit is used to monitor the hydrogen concentration around the thermoelectric unit; the fire protection system is used to prevent fire;

[0022] The control unit is electrically connected to the thermoelectric unit, power regulation unit, energy storage unit, hydrogen leakage detection unit, and fire protection system respectively, and is used to adjust, control, and record their operating status; the control unit is also electrically connected to the control system to receive and process the control system instructions.

[0023] Furthermore, preferably, the thermoelectric unit is also connected to a heating system through a water pipeline, and the heating system utilizes the residual heat of the thermoelectric unit to heat the working area.

[0024] Further, preferably, the hydrogen filling machine is composed of a solenoid valve, a safety valve, a pressure gauge, a mass flow meter, a hydrogenation hose, and a TK16 hydrogenation gun and a TK25 hydrogenation gun;

[0025] It can be manually shut off and unloaded. The mass flow meter is used to measure hydrogen during filling. The safety valve is configured to ensure that the system is not over-pressurized. The solenoid valve cuts off the passage after the TK16 hydrogenation gun and the TK25 hydrogenation gun complete hydrogen filling;

[0026] The pressure gauge is used to display the hydrogen filling pressure to prevent abnormal filling pressure.

[0027] Furthermore, preferably, the control system adopts a high-performance PLC machine as the system monitoring host, configures a photovoltaic power generation system to control the photovoltaic power generation equipment, configures a water electrolysis hydrogen production-hydrogen storage system to control the PEM hydrogen production equipment and the integrated pressurized hydrogen storage equipment, configures a hydrogen fuel cell system to control the hydrogen fuel cell, configures a hydrogen refueling system to control the hydrogen filling machine, and configures a heating software system to control the heating equipment; at the same time, RS485 / Ethernet communication is adopted between each device, and the stable and efficient operation of the system is guaranteed by managing, monitoring, controlling and optimizing the operating data.

[0028] Furthermore, preferably, an integrated energy management system is also provided in the control system, which provides data management, monitoring, control and optimization for dispatch control to ensure stable and efficient operation of the energy storage system. The integrated energy management system provides power and voltage set points for each energy controller within each system to ensure that each system meets the operation agreement between each system.

[0029] Compared with the prior art, the present invention provides a hydrogen energy interactive multi-regional electric-hydrogen coupling integrated energy system, which has the following beneficial effects:

[0030] In this invention, valley electricity generated by renewable energy (solar energy) will be fully utilized to produce hydrogen, which can be used to charge hydrogen buses and provide hydrogen sources for industrial hydrogen units in the park. In the future, hydrogen can be transported through pipelines for end users. Non-renewable electricity can also be used to electrolyze water on site to produce hydrogen and then store it, and then generate heat and power through fuel cells to regulate the peak of the power system, achieve environmentally friendly green operations, and help to absorb excess energy.

[0031] The modular containerized photovoltaic PEM hydrogen production - hydrogen storage - hydrogen refueling - hydrogen fuel cell cogeneration integrated hydrogen energy comprehensive utilization can verify the full range of hydrogen energy scenarios such as photovoltaic direct hydrogen production, high-pressure hydrogen storage, hydrogen fuel cell cogeneration, and hydrogen energy transportation.

[0032] The cost of producing hydrogen through photovoltaic power generation is roughly equivalent to the cost of industrial by-product hydrogen, which will help strengthen carbon tax transactions in green certificates and carbon trading in the future. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is an overall schematic diagram of a hydrogen energy interactive multi-regional electricity-hydrogen coupling integrated energy system;

[0034] Figure 2 A schematic diagram of a hydrogen energy application framework for a hydrogen energy interactive multi-regional electricity-hydrogen coupling integrated energy system;

[0035] Figure 3 It is a schematic diagram of the framework of a PEM hydrogen production equipment for a hydrogen energy interactive multi-regional electric-hydrogen coupling integrated energy system;

[0036] Figure 4 It is a flow chart of a hydrogen fuel cell cogeneration system for a hydrogen energy interactive multi-regional electricity-hydrogen coupling integrated energy system;

[0037] Figure 5 It is an integrated pressurized hydrogen storage and refueling framework process for a hydrogen energy interactive multi-regional electric-hydrogen coupled integrated energy system;

[0038] Figure 6 It is the overall framework of a 100kW hydrogen fuel cell cogeneration system for a hydrogen energy interactive multi-regional electricity-hydrogen coupling integrated energy system;

[0039] Figure 7 This is a schematic diagram of the PEM electrolyzer structure of a hydrogen energy interactive multi-region electric-hydrogen coupled integrated energy system.

[0040] In the figure: 1. Photovoltaic power generation equipment; 2. PEM hydrogen production equipment; 21. Deionized water system; 22. Power regulator; 23. PEM electrolyzer; 231. Anode electrode plate; 232. Cathode electrode plate; 233. Cathode hydrogen outlet; 234. Cathode fixture; 235. Cathode bipolar plate; 236. Cathode diffusion layer; 237. Cathode catalyst; 238. PEM membrane; 239. Anode catalyst; 2310. Anode diffusion layer; 2311. Anode bipolar plate; 2312. Anode fixture; 2313. Anode water inlet; 2314. Anode oxygen / water outlet; 2315. Anode electrode plate; 3. Integrated pressurized hydrogen storage equipment; 31. Hydrogen-water separator; 32. Liquid-driven pressurization system; 33. Hydrogen storage bottle; 4. Hydrogen fuel cell; 5. Hydrogen filling machine; 6. Hydrogen fuel cell; 61. Thermoelectric unit; 62. Energy storage unit; 63. Hydrogen storage bottle; 64. Hydrogen leak detection unit; 65. Control unit; 66. Power regulation unit; 7. Electrical equipment; 8. Heating system; 9. Control system. DETAILED DESCRIPTION

[0041] Reference Figures 1 to 7 , the present invention provides a technical solution: a hydrogen energy interactive multi-regional electric hydrogen coupling integrated energy system, comprising: photovoltaic power generation equipment 1, PEM hydrogen production equipment 2, integrated pressurized hydrogen storage equipment 3, hydrogen fuel cell 6, control system 9;

[0042] The photovoltaic power generation equipment 1 is electrically connected to the PEM hydrogen production equipment 2 and the national grid line; a power distribution system 10 is provided on the national grid line, and the power distribution system 10 is used to distribute electricity to the PEM hydrogen production equipment 2 and the integrated pressurized hydrogen storage equipment 3;

[0043] The PEM hydrogen production device 2 is connected to the gas inlet end of the integrated pressurized hydrogen storage device 3 through a hydrogen pipeline, and the integrated pressurized hydrogen storage device 3 is used to dry, high-pressure treat and store the hydrogen produced by the PEM hydrogen production device 2;

[0044] The integrated supercharger gas transmission end is provided with an interface, which is connected to the hydrogen fuel cell 6 and the hydrogen filling machine 5 through a hydrogen pipeline and a hydrogen pipeline respectively; the hydrogen fuel cell 6 is electrically connected to the electrical equipment 7, and is connected to the heating system 8 through a water pipeline;

[0045] The control system 9 is electrically connected to the photovoltaic power generation equipment 1 , the PEM hydrogen production equipment 2 , the integrated pressurized hydrogen storage equipment 3 , and the hydrogen fuel cell 6 , respectively.

[0046] As a preferred embodiment, the PEM hydrogen production equipment 2 includes: a deionized water system 21, a power regulator 22, and a PEM electrolyzer 23;

[0047] The water inlet end of the deionized water system 21 is connected to the tap water interface through a water pipeline, and the water outlet end is connected to the water inlet end of the PEM electrolyzer 23 through a water pipeline. The deionized water system 21 is used to process and filter tap water; one end of the power regulator 22 is electrically connected to the photovoltaic power generation equipment 1 and the national grid line, and the other end is electrically connected to the wiring terminal of the PEM electrolyzer 23. The PEM electrolyzer 23 is connected to the integrated pressurized hydrogen storage device 3 through a hydrogen pipeline.

[0048] As a preferred embodiment, the power regulator 22 switches the power of the photovoltaic power generation equipment 1 and the power distribution system 10; when the power generation of the photovoltaic power generation equipment 1 is insufficient, the power of the power distribution system 10 is mobilized to ensure the normal power demand of the PEM electrolyzer 23.

[0049] It should be noted that the tap water flows into the deionized water system 21 through the waterway pipe, and the tap water is purified and deionized by the deionized water system 21. The tap water after purification and deionization meets the requirements of hydrogen production by electrolysis of the PEM electrolyzer, that is, pure water. Then the pure water flows into the PEM electrolyzer through the waterway pipe.

[0050] The PEM electrolyzer uses a perfluorosulfonic acid proton exchange membrane with good chemical stability, proton conductivity, and gas separation as a solid electrolyte to replace the asbestos membrane, which can effectively prevent electron transfer and improve the safety of the electrolyzer. The main components of the PEM electrolyzer are the proton exchange membrane, the cathode and anode catalyst layer, the cathode and anode gas diffusion layer, and the cathode and anode end plates from the inside to the outside. The diffusion layer, the catalyst layer, and the proton exchange membrane form the membrane electrode, which is the main place for material transmission and electrochemical reaction in the entire water electrolyzer. The membrane electrode characteristics and structure directly affect the performance and life of the PEM water electrolyzer.

[0051] During electrolysis, pure water flows from the anode water inlet 2313 to the anode bipolar plate 2311, passes through the anode diffusion layer 2310 to make the mass transfer uniform, and then contacts the anode catalyst 239. Under the action of voltage, water dissociates to produce O 2 , H + and electrons. The electrons are led out along the external circuit (power supply), O 2 The H + Under the action of the electric field force, the hydrogen passes through the PEM membrane to reach the cathode catalyst 237 , combines with electrons provided by the external circuit on the surface of the cathode catalyst 237 , and is discharged along the cathode hydrogen outlet 233 of the cathode bipolar plate 235 .

[0052] The anode electrode plate 231 and the cathode electrode plate 232 are connected to the external circuit to provide the electrons required for hydrolysis of hydrogen; the cathode clamp 234 and the anode clamp 2312 reinforce the electrolytic cell to improve the contact effect between each catalyst and the diffusion layer.

[0053] The PEM electrolyzer uses a PEM membrane 238 with a thickness of only 0.1 mm between the cathode and the anode to achieve H + High-speed ion conduction for the medium. PEM membrane 238 has the characteristics of high strength and ultra-low permeability, which makes PEM electrolysis have significant advantages over traditional alkaline solution electrolysis, such as compact structure, small ohmic loss, low required voltage, high current density (1-3A / cm2), no need for regular shutdown maintenance, short start-up time, adaptability to wide power fluctuations and fast power change response.

[0054] As a preferred embodiment, the integrated pressurized hydrogen storage device 3 includes: a hydrogen-water separator 31, a liquid-driven pressurization system 32, and a hydrogen storage bottle 33;

[0055] The input end of the hydrogen-water separator 31 is connected to the hydrogen output end of the PEM electrolyzer 23 through a hydrogen pipeline, so as to dry the hydrogen; the input end of the liquid drive boosting system 32 is connected to the output end of the hydrogen-water separator 31 through a hydrogen pipeline, so as to boost the pressure of the hydrogen after drying;

[0056] The input end of the hydrogen storage bottle 33 is connected to the output end of the liquid-driven boosting system 32 through a hydrogen pipeline, and is used to store pressurized hydrogen; the output end of the hydrogen storage bottle 33 is provided with a connector, and the connector is connected to the hydrogen fuel cell 6 and the hydrogen filling machine 5 through a hydrogen pipeline.

[0057] As a preferred embodiment, the integrated pressurized hydrogen storage device 3 further includes a monitoring module 4, and the monitoring module 4 includes: a hydrogen concentration sensor, a flame detector, a temperature sensor, and a lighting device.

[0058] It should be explained that the hydrogen produced by the PEM electrolyzer 23 passes through the hydrogen pipeline and a very small amount of water is separated under the action of the hydrogen-water separator 21, and the water is discharged so that the hydrogen remains dry.

[0059] It should be noted that the liquid-driven boosting system 32 has a low operating frequency and a long service life under the same output efficiency. It has a relatively simple structure and is easy to maintain. Under the same power state, it has a smaller volume and a higher efficiency.

[0060] The liquid-driven boosting system 32 main engine configured in the scheme is driven by a motor to drive the hydraulic oil pump to drive the piston to reciprocate and compress hydrogen. The compressor cylinder is uniquely designed and adopts a three-stage compression form. The single-stage compression ratio is low, the exhaust temperature is low, and the compression efficiency is high. It can boost the low-pressure (2.0-3.0MPa) hydrogen to 35MPa; the compression system is equipped with a variable frequency motor, which can output a maximum of 50Nm3 / h of high-pressure hydrogen according to demand.

[0061] After the hydrogen is pressurized, it is stored in the hydrogen storage bottle 32 through the hydrogen pipeline for temporary storage.

[0062] As a preferred embodiment, the hydrogen fuel cell 6 includes: a thermoelectric unit 61, a control unit 65, a power adjustment unit 66, an energy storage unit 62, a hydrogen leakage detection unit 64, and a fire protection system 63;

[0063] The hydrogen inlet of the thermoelectric unit is connected to the hydrogen storage bottle 33; the energy storage unit 62 is electrically connected to the power transmission end of the thermoelectric unit 61; the input end of the power regulating unit 66 is electrically connected to the energy storage unit 62, and the output end is electrically connected to the electrical equipment;

[0064] The hydrogen leakage detection unit 64 is used to monitor the hydrogen concentration around the thermoelectric unit 61; the fire protection system 63 is used to prevent fire;

[0065] The control unit 65 is electrically connected to the thermoelectric unit 61, the power adjustment unit 66, the energy storage unit 62, the hydrogen leakage detection unit 64, and the fire protection system 63, respectively, for adjusting, controlling, and recording their operating states; the control unit 65 is also electrically connected to the control system 9 to receive and process instructions from the control system 9.

[0066] As a preferred embodiment, the thermoelectric unit is also connected to a heating system through a water pipeline, and the heating system uses the residual heat of the thermoelectric unit to heat the working area.

[0067] It should be noted that a hydrogen fuel cell is a power generation device that directly converts the chemical energy of hydrogen into electrical energy and thermal energy in an electrochemical manner. The system inputs hydrogen and air and outputs electrical energy and pure water. The thermoelectric unit is the basic component of the fuel cell cogeneration system. Each thermoelectric unit contains independent control, monitoring, humidification and gas supply components, and the total cogeneration efficiency is ≥85%. The hydrogen fuel cell system is composed of a coordinated stack (core), a hydrogen supply circulation system, an air circulation system, a water and heat management system, an electronic control system, and an intelligent monitoring system.

[0068] In this solution, a fuel cell thermoelectric unit is used to achieve the 100kW power output requirement. The H2E-100kW fuel cell cogeneration system is a set of energy supply systems mainly used for local independent power supply and heating equipment. The product generates direct current through electrochemical reaction of hydrogen and air, which is further inverted into alternating current through the power electronics system and sent to the grid for users. The waste heat generated by the product is recovered and supplied to users in the form of hot water.

[0069] The power demand of this project is 100kW, grid-connected output, and the system adopts an integrated design. The system mainly consists of hydrogen supply module, air supply module, fuel cell module, grid-connected control module, safety module, heating module, etc. The whole system is highly integrated, beautiful and safe. The main parameters of the system are shown in Table 1:

[0070]

[0071]

[0072] As a preferred embodiment, the hydrogen filling machine 5 is composed of a solenoid valve, a safety valve, a pressure gauge, a mass flow meter, a hydrogenation hose, and a TK16 hydrogenation gun and a TK25 hydrogenation gun;

[0073] It can be manually shut off and unloaded. The mass flow meter is used to measure hydrogen during filling. The safety valve is configured to ensure that the system is not over-pressurized. The solenoid valve cuts off the passage after the TK16 hydrogenation gun and the TK25 hydrogenation gun complete hydrogen filling;

[0074] The pressure gauge is used to display the hydrogen filling pressure to prevent abnormal filling pressure.

[0075] During hydrogenation, the computer control system automatically controls the opening or closing of the solenoid valve according to the working status, and the compressed hydrogen enters the TK16 hydrogenation gun or TK25 hydrogenation gun through the hydrogenation pipeline. The hydrogen flows through the mass flow meter solenoid valve and the hydrogenation gun in turn, and then is filled into the on-board hydrogen storage bottle through the hydrogenation port of the hydrogen fuel cell vehicle. When the pressure or flow reaches the target value, the computer control system closes the solenoid valve or gas control valve; the mass flow meter measures the mass, flow and other metering signals and transmits them to the computer control system. After calculation and processing, the corresponding mass and amount are obtained and displayed to the user in real time on the display screen, thereby completing a hydrogenation metering process.

[0076] As a preferred embodiment, the control system 9 adopts a high-performance PLC machine as the system monitoring host, configures a photovoltaic power generation system to control the photovoltaic power generation equipment 1, configures a water electrolysis hydrogen production-hydrogen storage system to control the PEM hydrogen production equipment 2 and the integrated pressurized hydrogen storage equipment 3, configures a hydrogen fuel cell system to control the hydrogen fuel cell 6, configures a hydrogenation system to control the hydrogen filling machine 5, and configures a heating software system to control the heating equipment; at the same time, RS485 / Ethernet communication is adopted between each device, and the stable and efficient operation of the system is guaranteed by managing, monitoring, controlling and optimizing the operating data.

[0077] As a preferred embodiment, an integrated energy management system is also provided in the control system 9, which provides data management, monitoring, control and optimization for dispatch control, and ensures the stable and efficient operation of the energy storage system. The integrated energy management system provides power and voltage set points for each energy controller in each system, ensuring that each system meets the operation agreement between each system.

[0078] It should be noted that the control system 9 has the following priorities: hydrogen energy system safety → independent stable and reliable operation of each energy mode → optimization and efficient combination linkage between each energy supply mode → internal working condition conversion of each energy supply mode. Maximize the utilization of comprehensive energy system efficiency.

[0079] Among them, the electrolysis of water hydrogen production and hydrogen storage system mainly includes: startup interface, process interface, photovoltaic power generation interface, hydrogen fuel power generation interface, alarm interface, setting interface, etc. The process interface shows the main process flow of the entire photovoltaic hydrogen production system, which requires that each link can be 100% corresponding to the number inside the equipment, and can display the action instructions of each valve and detailed parameters.

[0080] The alarm interface is equipped with an alarm information storage function, which can query the historical alarm information and current information of the equipment. The information here includes: overpressure alarm, water shortage alarm, hydrogen leakage alarm, water quality alarm, water temperature alarm, etc. The alarm here will be displayed in the alarm record of the equipment, and the total alarm of each subsystem will be transmitted to the user to remind the user to perform system maintenance work.

[0081] The hydrogen fuel cell system includes a voltage-stabilizing power supply, an electromagnetic valve, temperature detection, voltage detection, gas leakage, pressure detection, and remote control. When the system operating temperature is abnormal, the output voltage is too low, or hydrogen leakage or hydrogen gas outage occurs, the management personnel can be notified through an alarm. The management personnel can also shut down the hydrogen fuel cell stack to prevent the failure from expanding.

[0082] The hydrogenation system adopts an independent metering control system and uses a German Reniok mass flowmeter with pressure and temperature compensation functions. The maximum indication error of the 35MPa hydrogenation system is not less than 1.5 levels, and the metering repeatability is ≤1%. A first-line brand breakaway valve is used to ensure that the breakaway separation can be achieved by applying a force of no more than 68kg in any direction of vehicle movement. After the breakaway valve is separated under the action of external force, both ends are automatically sealed and will not leak hydrogen. A safety valve is configured with an overpressure protection function. When the filling pressure reaches the standard pressure value, it can automatically open and release to ensure the safety of the filled vehicle and personnel. A hydrogen detection probe is installed inside, with hydrogen leak detection, alarm and shutdown functions. When the filling pressure reaches the standard pressure value, the filling can be automatically stopped, and the filling pressure can be adjusted within the specified range.

[0083] The gas inlet of the hydrogenation system is equipped with a filter (filtration accuracy ≤ 5 microns), which can effectively protect the equipment from damage by particulate impurities. The hydrogenation system is equipped with a pipeline system purge function. The pipeline end is equipped with a pressure gauge and a pressure sensor to indicate the internal pressure of each pipeline. The hydrogenation system is equipped with an emergency shut-off valve. When the hydrogen content in the air reaches 0.4% (10% LEL), an alarm signal should be issued; when the hydrogen content in the air reaches 1.6% (40% LEL), a shutdown signal is issued to achieve interlocking shut-off.

[0084] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hydrogen energy interactive multi-regional electricity-hydrogen coupling integrated energy system, characterized by: include: Photovoltaic power generation equipment (1), PEM hydrogen production equipment (2), integrated pressurized hydrogen storage equipment (3), hydrogen fuel cell (6), control system (9); The photovoltaic power generation equipment (1) is electrically connected to the PEM hydrogen production equipment (2) and the national power grid line; a power distribution system (10) is provided on the national power grid line, and the power distribution system (10) is used to distribute electricity to the PEM hydrogen production equipment (2) and the integrated pressurized hydrogen storage equipment (3); The PEM hydrogen production device (2) is connected to the gas inlet end of the integrated pressurized hydrogen storage device (3) through a hydrogen pipeline, and the integrated pressurized hydrogen storage device (3) is used to dry, high-pressure treat and store the hydrogen produced by the PEM hydrogen production device (2); The integrated pressurized gas transmission end is provided with an interface, and the interface is connected to the hydrogen fuel cell (6) and the hydrogen filling machine (5) through a hydrogen pipeline and a hydrogen pipeline respectively; the hydrogen fuel cell (6) is electrically connected to the electrical equipment (7) and is connected to the heating system (8) through a water pipeline; The control system (9) is electrically connected to the photovoltaic power generation equipment (1), the PEM hydrogen production equipment (2), the integrated pressurized hydrogen storage equipment (3), and the hydrogen fuel cell (6) respectively.

2. The hydrogen energy interactive multi-regional electricity-hydrogen coupling integrated energy system according to claim 1 is characterized by: The PEM hydrogen production equipment (2) comprises: a deionized water system (21), a power regulator (22), and a PEM electrolyzer (23); The water inlet of the deionized water system (21) is connected to the tap water interface through a water pipeline, and the water outlet is connected to the water inlet of the PEM electrolyzer (23) through a water pipeline. The deionized water system (21) is used to process and filter tap water. One end of the power regulator (22) is electrically connected to the photovoltaic power generation equipment (1) and the national power grid line, and the other end is electrically connected to the connection terminal of the PEM electrolyzer (23). The PEM electrolyzer (23) is connected to the integrated pressurized hydrogen storage device (3) through a hydrogen pipeline.

3. A hydrogen energy interactive multi-regional electricity-hydrogen coupling integrated energy system according to claim 2, characterized in that: The power regulator (22) switches the power between the photovoltaic power generation device (1) and the power distribution system (10); when the power generation of the photovoltaic power generation device (1) is insufficient, the power of the power distribution system (10) is mobilized to ensure the normal power demand of the PEM electrolyzer (23).

4. The hydrogen energy interactive multi-regional electricity-hydrogen coupling integrated energy system according to claim 3 is characterized by: The integrated pressurized hydrogen storage device (3) comprises: a hydrogen-water separator (31), a liquid-driven pressurization system (32), and a hydrogen storage bottle (33); The input end of the hydrogen-water separator (31) is connected to the hydrogen output end of the PEM electrolyzer (23) through a hydrogen pipeline, and is used to dry the hydrogen; the input end of the liquid drive boosting system (32) is connected to the output end of the hydrogen-water separator (31) through a hydrogen pipeline, and is used to boost the pressure of the hydrogen after drying; The input end of the hydrogen storage bottle (33) is connected to the output end of the liquid-driven boosting system (32) through a hydrogen pipeline, and is used to store pressurized hydrogen; the output end of the hydrogen storage bottle (33) is provided with a connector, and the connector is connected to the hydrogen fuel cell (6) and the hydrogen filling machine (5) through a hydrogen pipeline.

5. The hydrogen energy interactive multi-regional electricity-hydrogen coupling integrated energy system according to claim 4 is characterized by: The integrated pressurized hydrogen storage device (3) further comprises a monitoring module (4), wherein the monitoring module (4) comprises: a hydrogen concentration sensor, a flame detector, a temperature sensor, and a lighting device.

6. The hydrogen energy interactive multi-regional electricity-hydrogen coupling integrated energy system according to claim 4 is characterized by: The hydrogen fuel cell (6) comprises: a thermoelectric unit (61), a control unit (65), a power adjustment unit (66), an energy storage unit (62), a hydrogen leakage detection unit (64), and a fire protection system (63); The hydrogen inlet of the thermoelectric unit is in communication with the hydrogen storage bottle (33); the energy storage unit (62) is electrically connected to the power transmission end of the thermoelectric unit (61); the input end of the power regulating unit (66) is electrically connected to the energy storage unit (62), and the output end is electrically connected to the electrical equipment; The hydrogen leakage detection unit (64) is used to monitor the hydrogen concentration around the thermoelectric unit (61); the fire protection system (63) is used to prevent fire from occurring; The control unit (65) is electrically connected to the thermoelectric unit (61), the power adjustment unit (66), the energy storage unit (62), the hydrogen leakage detection unit (64), and the fire protection system (63) respectively, and is used to adjust, control, and record their operating states; the control unit (65) is also electrically connected to the control system (9) to receive and process instructions from the control system (9).

7. The hydrogen energy interactive multi-regional electricity-hydrogen coupling integrated energy system according to claim 6, characterized in that: The thermoelectric unit is also connected to a heating system through a water pipeline, and the heating system uses the residual heat of the thermoelectric unit to heat the working area.

8. The hydrogen energy interactive multi-regional electricity-hydrogen coupling integrated energy system according to claim 4 is characterized by: The hydrogen filling machine (5) is composed of a solenoid valve, a safety valve, a pressure gauge, a mass flow meter, a hydrogenation hose, and a TK16 hydrogenation gun and a TK25 hydrogenation gun; It can be manually shut off and unloaded. The mass flow meter is used to measure hydrogen during filling. The safety valve is configured to ensure that the system is not over-pressurized. The solenoid valve cuts off the passage after the TK16 hydrogenation gun and the TK25 hydrogenation gun complete hydrogen filling; The pressure gauge is used to display the hydrogen filling pressure to prevent abnormal filling pressure.

9. A hydrogen energy interactive multi-regional electricity-hydrogen coupling integrated energy system according to claims 1-7, characterized in that: The control system (9) uses a high-performance PLC machine as a system monitoring host, configures a photovoltaic power generation system to control the photovoltaic power generation equipment (1), configures a water electrolysis hydrogen production-hydrogen storage system to control the PEM hydrogen production equipment (2) and the integrated pressurized hydrogen storage equipment (3), configures a hydrogen fuel cell system to control the hydrogen fuel cell (6), configures a hydrogenation system to control the hydrogen filling machine (5), and configures a heating software system to control the heating equipment; at the same time, RS485 / Ethernet communication is used between each device to manage, monitor, control and optimize the operation data to ensure stable and efficient operation of the system.

10. The hydrogen energy interactive multi-regional electricity-hydrogen coupling integrated energy system according to claim 9, characterized in that: An integrated energy management system is also provided in the control system (9), which provides data management, monitoring, control and optimization for dispatch control, and ensures stable and efficient operation of the energy storage system. The integrated energy management system provides power and voltage set points for each energy controller in each system, ensuring that each system meets the operation agreement between each system.

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