Wind and light storage coupled hydrogen production-hydrogen storage-hydrogen utilization system

Abstract

The utility model relates to a wind and light storage coupled hydrogen production-hydrogen storage-hydrogen utilization system which comprises a renewable energy power generation system, a load system, an energy storage system, a hydrogen production system, a hydrogen storage system, a hydrogen utilization system and a central controller, the renewable energy power generation system is connected with the load system, the energy storage system and the hydrogen production system; the renewable energy power generation system and the load system are connected with a power grid; the hydrogen production system is connected with the hydrogen using system through the hydrogen storage system; the hydrogen utilization system comprises a fuel cell and a green ammonia synthesis device, and the fuel cell is connected with the load system; the renewable energy power generation system, the load system, the energy storage system and the hydrogen production system are connected with the central controller through pressure and concentration sensors; the hydrogen storage system is connected with the hydrogen refueling station and is connected with the central controller through a concentration and liquid level sensor; and the hydrogen using system is connected with the central controller. According to the utility model, the problems of lack of hydrogen absorption scenes and unstable output of renewable energy sources can be solved, and the energy utilization efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the field of energy technology, and in particular relates to a wind-solar-storage coupled hydrogen production-storage-use system. Background Art

[0002] With the vigorous development of renewable energy and hydrogen energy industries, the future development trend of clean energy is to combine renewable energy with hydrogen energy, build an integrated energy system, and achieve efficient utilization and sustainable development of energy. The expansion of the scale of hydrogen production from renewable energy makes the storage, transportation and consumption of hydrogen more prominent. Therefore, it is an urgent problem to combine renewable energy with hydrogen energy, establish a systematic energy management strategy (EMS), and form a complementary coupled "wind, light, hydrogen storage" integrated energy system. Utility Model Content

[0003] The purpose of the utility model is to provide a wind-solar-storage coupled hydrogen production-storage-use system to solve the above technical problems.

[0004] The utility model provides a wind-solar-storage coupled hydrogen production-storage-use system, including a renewable energy power generation system, a load system, an energy storage system, a hydrogen production system, a hydrogen storage system, a hydrogen use system, and a central controller;

[0005] The renewable energy power generation system is connected to the load system, energy storage system and hydrogen production system to provide power to the load system, energy storage system and hydrogen production system; the renewable energy power generation system and load system are connected to the power grid;

[0006] The hydrogen production system is connected to the hydrogen use system through the hydrogen storage system; the hydrogen use system includes a fuel cell and a green ammonia synthesis device, and the fuel cell is connected to the load system;

[0007] The renewable energy power generation system is connected to the central controller via current and power sensors, and is used to collect the power generation of renewable energy via the current and power sensors, and transmit it to the central controller via digital signals;

[0008] The load system is connected to the central controller via current and power sensors, and is used to collect instantaneous power load via the current and power sensors, and transmit the data to the central controller via digital signals;

[0009] The energy storage system is connected to the central controller via a current and power sensor, and is used to transmit the charging and discharging information of the energy storage system to the central controller via the current and power sensor;

[0010] The hydrogen production system is connected to the central controller via a pressure and concentration sensor, and is used to transmit pressure and concentration information of the hydrogen production system to the central controller via the pressure and concentration sensor;

[0011] The hydrogen storage system is connected to the hydrogen refueling station and is connected to the central controller through a concentration and liquid level sensor, and is used to transmit the concentration and liquid level information of the hydrogen storage system and the hydrogen capacity demand of the hydrogen refueling station to the central controller through the concentration and liquid level sensor;

[0012] The hydrogen system is connected to the central controller via a three-way valve and a pressure and flow sensor, and is used to transmit the pressure and flow information of the hydrogen system to the central controller via the pressure and flow sensor;

[0013] The central controller is used for:

[0014] When the power generation is less than the power load, the load supply mode is executed. First, the energy storage system discharges to meet the load. If the load requirement is still not met, the fuel cell is used as a power source to meet the load. If it still cannot meet the load requirement, electricity is purchased from the grid to meet the load.

[0015] When the wind and solar power generation is greater than the power load, and this moment is the peak power consumption, the full-power grid-connected mode is implemented. In addition to meeting the power load of the park, the remaining power generation is connected to the grid; when this moment is the low power consumption, the full-power hydrogen production mode is implemented. The excess electricity is first used to charge the energy storage system, and then the hydrogen storage system is used to meet the needs of the hydrogen refueling station. After that, the remaining hydrogen produced is distributed to the fuel cell and the green ammonia synthesis device in proportion by controlling the three-way valve.

[0016] Furthermore, the energy storage system is a lithium battery energy storage module.

[0017] Furthermore, the hydrogen production system includes a PEM water electrolysis hydrogen production module.

[0018] Furthermore, the renewable energy power generation system includes a photovoltaic power generation module and a wind power generation module.

[0019] Through the above scheme, renewable energy and hydrogen energy are combined to build a comprehensive energy system through the wind-solar-storage coupled hydrogen production-storage-use system, which solves the emission problems of carbon dioxide and other pollutants in the hydrogen production process. The prepared hydrogen is used to supply fuel cells and chemical products (green ammonia) as raw materials, solving the problem of lack of hydrogen consumption scenarios. At the same time, in the system, renewable energy power generation is mainly used to produce hydrogen, and a lithium battery energy storage system is configured to smooth the output power of renewable energy (such as photovoltaic and wind power) and reduce its volatility, while hydrogen is used as a backup energy source for fuel cells to provide electricity when renewable energy is insufficient. This can effectively solve the problem of unstable output of renewable energy and improve energy utilization efficiency.

[0020] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the wind-solar-storage coupled hydrogen production-storage-use system of the utility model;

[0022] Figure 2 This is a wind-solar-storage coupled hydrogen production-storage-use route map in one embodiment of the utility model;

[0023] Figure 3 It is a green hydrogen application roadmap in one embodiment of the utility model;

[0024] Figure 4 This is a schematic diagram of wind-solar power generation in one embodiment of the utility model. DETAILED DESCRIPTION

[0025] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] Ginseng Figures 1 to 4 As shown, this embodiment provides a wind-solar-storage coupled hydrogen production-storage-use system, including a renewable energy power generation system, a load system, an energy storage system, a hydrogen production system, a hydrogen storage system, a hydrogen use system, and a central controller;

[0027] The renewable energy power generation system is connected to the load system, energy storage system and hydrogen production system to provide power to the load system, energy storage system and hydrogen production system; the renewable energy power generation system and load system are connected to the power grid;

[0028] The hydrogen production system is connected to the hydrogen use system through the hydrogen storage system; the hydrogen use system includes a fuel cell and a green ammonia synthesis device, and the fuel cell is connected to the load system;

[0029] The renewable energy power generation system is connected to the central controller via current and power sensors, and is used to collect the power generation of renewable energy via the current and power sensors, and transmit it to the central controller via digital signals;

[0030] The load system is connected to the central controller via current and power sensors, and is used to collect instantaneous power load via the current and power sensors, and transmit the data to the central controller via digital signals;

[0031] The energy storage system is connected to the central controller via a current and power sensor, and is used to transmit the charging and discharging information of the energy storage system to the central controller via the current and power sensor;

[0032] The hydrogen production system is connected to the central controller via a pressure and concentration sensor, and is used to transmit pressure and concentration information of the hydrogen production system to the central controller via the pressure and concentration sensor;

[0033] The hydrogen storage system is connected to the hydrogen refueling station and is connected to the central controller through a concentration and liquid level sensor, and is used to transmit the concentration and liquid level information of the hydrogen storage system and the hydrogen capacity demand of the hydrogen refueling station to the central controller through the concentration and liquid level sensor;

[0034] The hydrogen system is connected to the central controller via a three-way valve and a pressure and flow sensor, and is used to transmit the pressure and flow information of the hydrogen system to the central controller via the pressure and flow sensor;

[0035] The central controller is used for:

[0036] When the power generation is less than the power load, the load supply mode is executed. First, the energy storage system discharges to meet the load. If the load requirement is still not met, the fuel cell is used as a power source to meet the load. If it still cannot meet the load requirement, electricity is purchased from the grid to meet the load.

[0037] When the wind and solar power generation is greater than the power load, and this moment is the peak power consumption, the full-power grid-connected mode is implemented. Except for meeting the variable power load, the remaining power generation is connected to the grid; when this moment is the low power consumption, the full-power hydrogen production mode is implemented. The excess electricity is first used to charge the energy storage system, and then the hydrogen storage system is used to meet the needs of the hydrogen refueling station. After that, the remaining hydrogen produced is distributed to the fuel cell and the green ammonia synthesis device in proportion by controlling the three-way valve.

[0038] In this embodiment, the energy storage system is a lithium battery energy storage module.

[0039] In this embodiment, the hydrogen production system includes a PEM water electrolysis hydrogen production module. The PEM (proton exchange membrane) water electrolysis hydrogen production technology is a completely clean hydrogen production method, which solves the emission problems of carbon dioxide and pollutants in the hydrogen production process. At the same time, the hydrogen production technology has high adaptability to intermittent power sources, is easy to combine with renewable energy sources such as wind and solar power, and has low equipment operation and maintenance difficulty. PEM (proton exchange membrane) water electrolysis hydrogen production can obtain high-purity hydrogen.

[0040] In this embodiment, the renewable energy power generation system includes a photovoltaic power generation module and a wind power generation module.

[0041] Ginseng Figure 2 As shown, the wind and solar power generation module supplies adjustable electric loads after inverter rectification. At the same time, lithium batteries, fuel cells, and power grids are used in conjunction with PEM water electrolysis hydrogen production modules. The generated hydrogen is used as the energy source of the fuel cell and is also used to synthesize green ammonia. When the wind and solar power generation is sufficient, the green electricity generated by the wind and solar power generation module is first used to meet the power load, and the excess electricity is used for PEM water electrolysis hydrogen production. The lithium battery energy storage module is used to cooperate with the PEM water electrolysis hydrogen production module to avoid the waste of electricity caused by the slow start of the hydrogen production module. At the same time, when the wind and solar power generation reaches full power, the lithium battery energy storage module is used to store electricity; when the wind and solar power generation is insufficient, the lithium battery energy storage module is first used to meet the power load. When the lithium battery energy storage module reaches the maximum power discharge and still cannot meet the power load, the hydrogen fuel cell is used to provide electricity. If it still cannot meet the load, the grid is used to supply power to meet the load demand.

[0042] Ginseng Figure 3 As shown, the hydrogen generated by PEM electrolysis of water meets the hydrogen demand of the hydrogen filling station and passes through a three-way valve. 70% of the hydrogen is pressurized by a compressor and enters a 50MPa hydrogen storage tank as energy supply for the fuel cell; 30% of the hydrogen passes through a compressor and a transportation pipeline into a 5MPa storage tank and is used as a chemical reaction raw material to synthesize green ammonia.

[0043] Ginseng Figure 4 As shown, the system's renewable energy power generation is "connected to the grid but not connected to the grid". The green electricity generated is used to supply the load and electrolyze water to produce hydrogen. When the wind and solar power generation, lithium battery energy storage modules and fuel cells cannot meet the load demand, it is necessary to draw electricity from the grid.

[0044] The photovoltaic power generation module uses photovoltaic array panels, and the wind power generation uses variable speed wind turbines with double-fed induction generators. They are connected to the grid and loads through inverters and rectifiers. The green electricity generated is rectified to supply loads and hydrogen production. The input of the photovoltaic power generation module is the regional sunlight intensity change curve, and the input of the wind power generation module is the regional daily wind speed change curve.

[0045] Through the wind-solar-storage coupled hydrogen production-storage-use system, renewable energy is combined with hydrogen energy to build a comprehensive energy system, which solves the emission problem of carbon dioxide and other pollutants in the hydrogen production process. The prepared hydrogen is used to supply raw materials for fuel cells and chemical products (green ammonia), solving the problem of lack of hydrogen consumption scenarios. High-purity hydrogen can be used as an energy source for fuel cells. The reaction of hydrogen and oxygen in the fuel cell can generate electricity, and the only emission is water vapor. At the same time, ammonia can also be used as a hydrogen storage medium. The mature storage and transportation system is used to effectively solve the problems of difficult and high cost of hydrogen storage and transportation. Ammonia (green ammonia) is synthesized by electrolysis of hydrogen produced by wind and solar power generation, and then ammonia / ammonia is used to decompose hydrogen for terminal energy scenarios, which helps to achieve zero carbon emissions for the entire industry chain. At the same time, in the system, renewable energy power generation is mainly used to produce hydrogen, and a lithium battery energy storage system is configured to smooth the output power of renewable energy (such as photovoltaic and wind power) and reduce its volatility, while hydrogen is used as a backup energy source for fuel cells to provide electricity when renewable energy is insufficient. This can effectively solve the problem of unstable output of renewable energy and improve energy utilization efficiency.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. A wind-solar-storage coupled hydrogen production-storage-use system, characterized in that: Including renewable energy power generation system, load system, energy storage system, hydrogen production system, hydrogen storage system, hydrogen use system, and central controller; The renewable energy power generation system is connected to the load system, energy storage system and hydrogen production system to provide power to the load system, energy storage system and hydrogen production system; the renewable energy power generation system and load system are connected to the power grid; The hydrogen production system is connected to the hydrogen use system through the hydrogen storage system; the hydrogen use system includes a fuel cell and a green ammonia synthesis device, and the fuel cell is connected to the load system; The renewable energy power generation system is connected to the central controller via current and power sensors, and is used to collect the power generation of renewable energy via the current and power sensors, and transmit it to the central controller via digital signals; The load system is connected to the central controller via current and power sensors, and is used to collect instantaneous power load via the current and power sensors, and transmit the data to the central controller via digital signals; The energy storage system is connected to the central controller via a current and power sensor, and is used to transmit the charging and discharging information of the energy storage system to the central controller via the current and power sensor; The hydrogen production system is connected to the central controller via a pressure and concentration sensor, and is used to transmit pressure and concentration information of the hydrogen production system to the central controller via the pressure and concentration sensor; The hydrogen storage system is connected to the hydrogen refueling station and is connected to the central controller through a concentration and liquid level sensor, and is used to transmit the concentration and liquid level information of the hydrogen storage system and the hydrogen capacity demand of the hydrogen refueling station to the central controller through the concentration and liquid level sensor; The hydrogen system is connected to the central controller via a three-way valve and a pressure and flow sensor, and is used to transmit the pressure and flow information of the hydrogen system to the central controller via the pressure and flow sensor; The central controller is used for: When the power generation is less than the power load, the load supply mode is executed. First, the energy storage system discharges to meet the load. If the load requirement is still not met, the fuel cell is used as a power source to meet the load. If it still cannot meet the load requirement, electricity is purchased from the grid to meet the load. When the wind and solar power generation is greater than the power load, and this moment is the peak power consumption, the full-power grid-connected mode is implemented. In addition to meeting the power load of the park, the remaining power generation is connected to the grid; when this moment is the low power consumption, the full-power hydrogen production mode is implemented. The excess electricity is first used to charge the energy storage system, and then the hydrogen storage system is used to meet the needs of the hydrogen refueling station. After that, the remaining hydrogen produced is distributed to the fuel cell and the green ammonia synthesis device in proportion by controlling the three-way valve.

2. The wind-solar-storage coupled hydrogen production-storage-use system according to claim 1 is characterized in that: The energy storage system is a lithium battery energy storage module.

3. The wind-solar-storage coupled hydrogen production-storage-use system according to claim 1 is characterized in that: The hydrogen production system comprises a PEM water electrolysis hydrogen production module.

4. The wind-solar-storage coupled hydrogen production-storage-use system according to claim 1 is characterized in that: The renewable energy power generation system includes a photovoltaic power generation module and a wind power generation module.

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