Coupling system based on hydrogen storage and retired thermal power auxiliary renewable energy power generation grid connection

Abstract

The invention discloses a coupling system based on hydrogen storage and decommissioning thermal power auxiliary renewable energy power generation grid connection. The coupling system comprises an electrolytic energy storage system integrating filtering, a hydrogen-fired gas-steam combined cycle power generation system and a water recycling system. The hydrogen-fired gas-steam combined cycle power generation system comprises a gas turbine and a steam turbine; the water recycling system comprises waste liquid treatment equipment, a waste heat boiler and waste gas purification equipment, the waste heat boiler is used for providing steam for the steam turbine and recycling waste gas exhausted by the gas turbine, the waste liquid treatment equipment is used for treating dead steam exhausted by the steam turbine and conveying the dead steam to the waste heat boiler for recycling, and the waste gas purification equipment communicates with the waste heat boiler. The device is used for treating exhaust smoke of the waste heat boiler. According to the coupling system based on hydrogen storage and retired thermal power auxiliary renewable energy power generation grid connection, the economic benefits and environmental benefits of the whole system are improved through efficient energy conversion, resource utilization, water treatment circulation, flue gas purification and other energy saving and emission reduction technologies.

Description

Technical Field

[0001] The present invention relates to the technical field of power generation, and particularly to a coupling system for auxiliary renewable energy power generation and grid connection based on hydrogen storage and retired thermal power. Background Art

[0002] In the existing power generation systems, there are problems of resource and energy waste, such as the inability to reasonably utilize the exhaust gas of gas turbines and the exhausted steam of steam turbines. In addition, using fossil fuels such as coal for power generation is also accompanied by energy problems, economic problems and environmental benefit problems, and cannot meet the requirements of energy conservation, emission reduction and environmental protection. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a coupling system for auxiliary renewable energy power generation and grid connection based on hydrogen storage and retired thermal power. The coupling system for auxiliary renewable energy power generation and grid connection based on hydrogen storage and retired thermal power significantly improves the economic and environmental benefits of the entire system through efficient energy conversion, resource utilization, water treatment cycle, flue gas purification and other energy conservation and emission reduction technologies.

[0004] The coupling system for auxiliary renewable energy power generation and grid connection based on hydrogen storage and retired thermal power according to an embodiment of the present invention includes: an integrated filtering electrolytic energy storage system, a hydrogen-fired gas-steam combined cycle power generation system and a water cycle reuse system. The integrated filtering electrolytic energy storage system is used for electrolyzing water to generate hydrogen and oxygen; the hydrogen-fired gas-steam combined cycle power generation system includes a gas turbine and a steam turbine, and the gas turbine uses the hydrogen and oxygen generated by the integrated filtering electrolytic energy storage system for combustion to generate power; the water cycle reuse system includes: waste liquid treatment equipment, a waste heat boiler and waste gas purification equipment. The waste heat boiler is used to provide steam to the steam turbine to drive the steam turbine to generate power. The waste heat boiler is connected to the gas turbine and is used for recovering the exhaust gas discharged by the gas turbine. The waste liquid treatment equipment is used for storing and treating the exhausted steam discharged by the steam turbine and transporting it to the waste heat boiler for reuse. The waste gas purification equipment is connected to the waste heat boiler and is used for treating the flue gas discharged by the waste heat boiler.

[0005] According to the coupling system based on hydrogen storage and retired thermal power assisting renewable energy power generation grid connection of the embodiments of the present invention, hydrogen and oxygen generated by electrolyzing water through integrating a filtered electrolytic energy storage system are transported into a gas turbine for mixed combustion to drive power generation, which can save fossil fuels such as coal. A waste heat boiler recovers and utilizes the high-temperature and high-pressure waste gas of the gas turbine and generates steam to supply a steam turbine to drive power generation. At the same time, a waste liquid treatment device stores and treats the exhausted steam discharged by the steam turbine and transports it to the waste heat boiler for reuse, which can realize the recyclable utilization of water and increase the feed water temperature of the waste heat boiler, improve the utilization rate of the waste gas of the gas turbine and the exhausted steam of the steam turbine, reduce the fuel consumption of the waste heat boiler and improve the thermal efficiency, optimize the thermodynamic cycle process, and achieve efficient energy conservation and emission reduction power generation. In addition, through an exhaust gas purification device, the flue gas and the like discharged by the waste heat boiler are purified, avoiding the generation of pollutants, and meeting the requirements of energy conservation, emission reduction and environmental protection.

[0006] According to some embodiments of the present invention, the coupling system based on hydrogen storage and retired thermal power assisting renewable energy power generation grid connection further includes a renewable energy power generation system for converting renewable energy into electric energy, and at least part of the electric energy used by the integrated and filtered electrolytic energy storage system for electrolyzing water comes from the renewable energy power generation system.

[0007] In some embodiments of the present invention, the renewable energy power generation system includes: a wind power generation set, a photovoltaic power generation set, and a biomass power generation set, and the wind power generation set, the photovoltaic power generation set, and the biomass power generation set are respectively used for converting renewable wind energy, solar energy, and biomass energy into electric energy.

[0008] In some embodiments of the present invention, the hydrogen-fired gas-steam combined cycle power generation system is further provided with retired thermal power facilities in a retired thermal power plant for recycling, and the retired thermal power facilities include a generator and a battery storage unit. The power output ends of the gas turbine and the steam turbine are connected to the generator; the battery storage unit is used for storing the electric energy output by the generator, and the first output end of the battery storage unit is connected to the power grid for supplying power to the power grid.

[0009] In some embodiments of the present invention, the battery storage unit is connected to the renewable energy power generation system for storing the electric energy output by the renewable energy power generation system.

[0010] In some embodiments of the present invention, the second output end of the battery storage unit is connected to the integrated and filtered electrolytic energy storage system for supplying power to the integrated and filtered electrolytic energy storage system.

[0011] According to some embodiments of the present invention, the integrated filtering electrolytic energy storage system includes an electrolytic hydrogen production device and an energy storage device. The electrolytic hydrogen production device is used for electrolyzing water to generate hydrogen and oxygen; the energy storage device is used for storing the hydrogen, oxygen and waste liquid generated by the electrolytic hydrogen production device.

[0012] In some embodiments of the present invention, the integrated filtering electrolytic energy storage system further includes a digital filter, which is used to divide the electric energy required by the electrolytic hydrogen production device into a high-frequency electric power part and a low-frequency electric power part by using a first-order inertial filtering method; the electrolytic hydrogen production device includes an alkaline electrolytic cell and a proton exchange membrane electrolytic cell. The alkaline electrolytic cell is supplied with the low-frequency electric power part, and the proton exchange membrane electrolytic cell is supplied with the high-frequency electric power part.

[0013] In some embodiments of the present invention, the energy storage device includes a hydrogen storage tank and an oxygen storage tank. The hydrogen storage tank is used for storing the hydrogen generated by the electrolytic hydrogen production device, and the hydrogen storage tank is communicated with the gas turbine; the oxygen storage tank is used for storing the oxygen generated by the electrolytic hydrogen production device, and the oxygen storage tank is communicated with the gas turbine.

[0014] In some embodiments of the present invention, the energy storage device further includes a liquid storage tank for storing the waste liquid generated by the electrolytic hydrogen production device. The liquid storage tank is communicated with the waste liquid treatment device, and the waste liquid treatment device treats the waste liquid discharged from the liquid storage tank and transports it to the waste heat boiler for reuse.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 is a block diagram of the component relationship of a coupling system for grid connection of renewable energy power generation assisted by hydrogen storage and retired thermal power according to an embodiment of the present invention;

[0018] Figure 2 is a schematic structural diagram of a coupling system for grid connection of renewable energy power generation assisted by hydrogen storage and retired thermal power according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0020] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0022] The following refers to Figure 1 - Figure 2 Describe a coupling system for hydrogen storage and retired thermal power assisting renewable energy power generation and grid connection according to an embodiment of the present invention.

[0023] As Figure 1 and Figure 2 shown, the coupling system for hydrogen storage and retired thermal power assisting renewable energy power generation and grid connection according to an embodiment of the present invention includes an integrated filtering electrolytic energy storage system, a hydrogen-fired gas-steam combined cycle power generation system, and a water cycle reuse system.

[0024] Specifically, the integrated filtering electrolytic energy storage system is used to electrolyze water to generate hydrogen and oxygen. The hydrogen-fired gas-steam combined cycle power generation system includes a gas turbine and a steam turbine. The gas turbine uses the hydrogen and oxygen generated by the integrated filtering electrolytic energy storage system for combustion to generate electricity.

[0025] The water cycle reuse system includes waste liquid treatment equipment, a waste heat boiler, and waste gas purification equipment. The waste heat boiler is used to supply steam to the steam turbine to drive the steam turbine to generate electricity. The waste heat boiler is connected to the gas turbine and is used to recover the waste gas discharged by the gas turbine. The waste liquid treatment equipment is used to store and treat the exhausted steam discharged by the steam turbine and transport it to the waste heat boiler for reuse. The waste gas purification equipment is connected to the waste heat boiler and is used to treat the flue gas of the waste heat boiler.

[0026] The hydrogen and oxygen produced by electrolyzing water in the integrated filter electrolytic energy storage system can be transported through pipelines to the hydrogen-fired gas-steam combined cycle power generation system for mixed combustion to generate high-temperature and high-pressure gas, and the high-temperature and high-pressure gas is used to drive a gas turbine to generate electricity. In this way, electrolyzing water can be used to replace fossil fuels such as coal, saving fossil fuels and facilitating energy conservation and emission reduction.

[0027] Furthermore, the gas turbine includes a compressor, a combustion chamber, and a turbine. The oxygen produced by electrolyzing water in the integrated filter electrolytic energy storage system is transported into the compressor of the gas turbine, compressed to a relatively high pressure, and then sent into the combustion chamber. The hydrogen produced by electrolyzing water is injected into the combustion chamber and mixed with oxygen as fuel for combustion to generate high-temperature and high-pressure gas. The high-temperature and high-pressure gas then rushes into the turbine to expand and do work, driving the turbine to rotate, and the rotation of the turbine drives the compressor and an external load (such as a generator, etc.) to rotate together. Thus, the chemical energy of hydrogen and oxygen is converted into mechanical energy, realizing the function of driving the gas turbine to generate electricity.

[0028] The intake input end of the waste heat boiler is connected to the gas turbine through a gas pipeline. The exhaust gas formed after the high-temperature and high-pressure gas in the gas turbine does work is transported into the waste heat boiler through the gas pipeline. Thus, the waste heat boiler can recover and reuse the high-temperature and high-pressure exhaust gas of the gas turbine, improving the utilization rate of the high-temperature and high-pressure exhaust gas of the gas turbine, reducing the fuel consumption of the waste heat boiler and increasing the thermal efficiency, and optimizing the thermal cycle process.

[0029] The steam output end of the waste heat boiler is connected to the input end of the steam turbine through a steam pipeline. The waste heat boiler generates high-temperature and high-pressure steam and supplies it to the steam turbine through the steam pipeline. The steam turbine uses the steam to expand in the cylinder to drive the blades of the steam turbine to rotate, thereby converting the thermal energy of the steam into mechanical energy and then driving the generator to generate electricity, thus realizing the function of driving the steam turbine to generate electricity.

[0030] The liquid intake input end of the waste heat boiler is connected to the output end of the waste liquid treatment equipment through a water pipeline. The waste liquid treatment equipment is used to store and treat the exhausted steam discharged from the steam turbine and transport it to the waste heat boiler through the water pipeline for reuse, which can increase the feed water temperature of the waste heat boiler, improve the utilization rate of the exhausted steam of the steam turbine, reduce the fuel consumption of the waste heat boiler and increase the thermal efficiency. It can optimize the thermal cycle process and ensure the overall stable operation of the coupled system based on hydrogen storage and retired thermal power-assisted renewable energy power generation and grid connection.

[0031] A first pipeline for water treatment and recovery is fixedly connected between the input end of the waste liquid treatment device and the waste liquid end of the steam turbine for discharging exhausted steam. After the waste liquid treatment device recovers exhausted steam and waste liquid and conducts water treatment, the water is circulated and transported to the waste heat boiler, enabling the waste heat boiler to produce high-pressure thermal steam for waste heat utilization and supplying the high-temperature and high-pressure steam to the steam turbine for steam power generation.

[0032] Meanwhile, the smoke exhaust output end of the waste heat boiler is fixedly connected to the waste gas purification device through a flue. The waste gas purification device purifies the flue gas and waste gas discharged by the waste heat boiler, etc., which can meet the requirements of energy conservation, emission reduction, and environmental protection. Through the water treatment of the waste liquid treatment device and the waste gas purification of the waste gas purification device, the recyclable utilization of water can be realized, and efficient energy conservation, emission reduction, and power generation can be achieved. The generation of pollutants is avoided, and deep energy conservation and carbon reduction in the whole process of energy conversion are realized.

[0033] This application significantly improves the economic and environmental benefits of the entire system through energy-saving and emission-reduction technologies such as efficient energy conversion, resource utilization, water treatment recycling, and flue gas purification.

[0034] According to the coupling system for hydrogen storage and retired thermal power-assisted renewable energy power generation and grid connection based on the embodiments of the present invention, the hydrogen and oxygen generated by electrolyzing water through the integrated and filtered electrolytic energy storage system are transported into the gas turbine for mixed combustion to achieve driving power generation, which can save fossil fuels such as coal. The waste heat boiler recovers and utilizes the high-temperature and high-pressure waste gas of the gas turbine and generates steam to supply the steam turbine to achieve driving power generation. At the same time, the waste liquid treatment device stores and treats the exhausted steam discharged by the steam turbine and transports it to the waste heat boiler for reuse, which can realize the recyclable utilization of water and increase the feed water temperature of the waste heat boiler, improve the utilization rate of the waste gas of the gas turbine and the exhausted steam of the steam turbine, reduce the fuel consumption of the waste heat boiler and improve the thermal efficiency, optimize the thermal cycle process, and achieve efficient energy conservation, emission reduction, and power generation. In addition, the waste gas purification device purifies the flue gas and other emissions from the waste heat boiler, avoiding the generation of pollutants and meeting the requirements of energy conservation, emission reduction, and environmental protection.

[0035] In some embodiments of the present invention, as Figure 1 and Figure 2 shown, the coupling system for hydrogen storage and retired thermal power-assisted renewable energy power generation and grid connection further includes a renewable energy power generation system for converting renewable energy into electrical energy, and at least part of the electrical energy used by the integrated and filtered electrolytic energy storage system for electrolyzing water comes from the renewable energy power generation system.

[0036] Renewable energy power generation systems can utilize renewable and infinitely recyclable energy resources in nature for power production. Renewable energy includes, but is not limited to, solar energy, wind energy, hydropower, biomass energy, geothermal energy, ocean energy, etc. Compared with traditional power generation using fossil fuels such as coal, renewable energy can not only be continuously regenerated in nature but also reduce greenhouse gas and pollutant emissions. By using a renewable energy power generation system to assist a hydrogen-fired gas-steam combined cycle power generation system in power generation, the loads on the gas turbine and steam turbine can be reduced and fuel consumption can be decreased.

[0037] In addition, an integrated filtering electrolytic energy storage system can use the excess electric energy generated by the renewable energy power generation system to electrolyze water to produce hydrogen, which can reduce the power burden generated by electrolyzing water.

[0038] In some embodiments of the present invention, as Figure 1 shown, the renewable energy power generation system includes: a wind power generation set, a photovoltaic power generation set, and a biomass power generation set. The wind power generation set, the photovoltaic power generation set, and the biomass power generation set are respectively used to convert renewable wind energy, solar energy, and biomass energy into electric energy. Using wind energy, solar energy, and biomass energy to generate electricity can reduce greenhouse gas and pollutant emissions. Multiple renewable energies cooperate with each other. When the power generation power is unstable due to factors such as weather conditions affecting one of the renewable energies, other renewable energies can achieve complementarity, thereby improving the stability of power supply.

[0039] In some embodiments of the present invention, as Figure 1 and Figure 2 shown, the hydrogen-fired gas-steam combined cycle power generation system is also provided with recycled retired thermal power facilities in a retired thermal power plant. The retired thermal power facilities include a generator and a battery storage unit. The power output ends of the gas turbine and the steam turbine are connected to the generator. The battery storage unit is used to store the electric energy output by the generator. The first output end of the battery storage unit is connected to the power grid for supplying power to the power grid. The retired thermal power facilities are the generator, the battery storage unit, and related power transmission and distribution facilities in the retired thermal power plant. By recycling the retired thermal power facilities, social resource waste is reduced and resource utilization rate is improved.

[0040] In some embodiments of the present invention, as Figure 2 shown, the battery storage unit is connected to the renewable energy power generation system and is used to store the electric energy output by the renewable energy power generation system. The electric energy of both the generator and the renewable energy power generation system is stored in the battery storage unit for use by the power grid, etc., which can improve the utilization rate of renewable energy power generation and also solve the seasonal fluctuations and energy storage problems of renewable energy power generation. When the supply of renewable energy is insufficient, it is convenient for the hydrogen-fired gas-steam combined cycle power generation system to assist or take over, so that the randomness and volatility of renewable energy can be effectively addressed.

[0041] In some embodiments of the present invention, as Figure 2 shown, the second output terminal of the power storage unit is connected to the electrolytic energy storage system with integrated filtering, and is used to supply power to the electrolytic energy storage system with integrated filtering. The first output terminal and the second output terminal of the power storage unit are respectively fixedly connected to the power grid and the electrolytic energy storage system with integrated filtering to supply power. In this way, the surplus power in the power storage unit can be used for electrolytic water hydrogen production, reducing the power burden of electrolytic water. At the same time, it is possible to realize the simultaneous power supply of the power grid and the electrolytic water hydrogen production using the surplus grid power of the renewable energy power generation system, achieving green zero-carbon in the power generation and power production processes, and being more energy-saving and environmentally friendly.

[0042] In some embodiments of the present invention, as Figure 1 and Figure 2 shown, the electrolytic energy storage system with integrated filtering includes an electrolytic hydrogen production device and an energy storage device. The electrolytic hydrogen production device is used for electrolyzing water to generate hydrogen and oxygen, and the energy storage device is used for storing the hydrogen, oxygen and waste liquid generated by the electrolytic hydrogen production device. The electrolytic hydrogen production device may be provided with an electrolytic cell, etc., to provide the necessary implementation conditions for electrolyzing water. The energy storage device is connected to the electrolytic hydrogen production device and can store hydrogen, oxygen and waste liquid respectively for subsequent use.

[0043] In some embodiments of the present invention, as Figure 1 shown, the electrolytic energy storage system with integrated filtering further includes a digital filter, which is used to divide the electric energy required by the electrolytic hydrogen production device into a high-frequency electric power part and a low-frequency electric power part by using the first-order inertia filtering method. The electrolytic hydrogen production device includes an alkaline electrolytic cell and a proton exchange membrane electrolytic cell. The alkaline electrolytic cell is supplied with the low-frequency electric power part of the electric energy, and the proton exchange membrane electrolytic cell is supplied with the high-frequency electric power part of the electric energy.

[0044] The digital filter uses the first-order inertia filtering method to convert the electric energy into a digital signal, and separates the high-frequency and low-frequency components in the process. Different types of electrolytic cells have different adaptabilities to the electric energy frequency. The alkaline electrolytic cell is more suitable for processing stable low-frequency electric energy, while the proton exchange membrane electrolytic cell can make more effective use of the high-frequency electric energy with a fast response speed. By dividing the electric energy into low-frequency and high-frequency parts, the most suitable electrolytic cell can be supplied respectively, thereby improving the energy utilization efficiency. High-frequency electric energy has a higher energy density and a faster response speed, so it can drive the electrolytic reaction faster and improve the electrolysis speed. This is of great significance for increasing the hydrogen production and reducing the production cost. By optimizing the frequency distribution of the electric energy, the electrolytic cell can operate in a more efficient working state, thereby reducing the energy consumption.

[0045] In some embodiments of the present invention, as Figure 1 and Figure 2As shown, the energy storage device includes a hydrogen storage tank and an oxygen storage tank. The hydrogen storage tank is used to store the hydrogen generated by the electrolytic hydrogen production device. The hydrogen storage tank is connected to the gas turbine. The oxygen storage tank is used to store the oxygen generated by the electrolytic hydrogen production device. The oxygen storage tank is connected to the gas turbine. The electrolytic hydrogen production device is fixedly connected to the hydrogen storage tank and the oxygen storage tank respectively through a plurality of pipelines. The hydrogen storage tank and the oxygen storage tank are fixedly connected to the gas turbine through a hydrogen supply pipeline and an oxygen supply pipeline respectively. Thus, the hydrogen and oxygen generated by the electrolytic hydrogen production device electrolyzing water are respectively transported to the gas turbine through the hydrogen supply pipeline and the oxygen supply pipeline for mixed combustion to generate high-temperature and high-pressure gas, and the gas turbine is driven by the high-temperature and high-pressure gas to generate electricity, thereby realizing the efficient conversion of electrical energy.

[0046] In some embodiments of the present invention, as Figure 1 and Figure 2 shown, the energy storage device further includes a liquid storage tank for storing the waste liquid generated by the electrolytic hydrogen production device. The liquid storage tank is connected to the waste liquid treatment device. The waste liquid treatment device treats the waste liquid discharged from the liquid storage tank and transports it to the waste heat boiler for reuse. A second pipeline for water treatment and recovery is fixedly connected between the input end of the waste liquid treatment device and the liquid storage tank. By setting the liquid storage tank and connecting it to the waste liquid treatment device, the waste liquid treatment device can recycle the electrolytic water waste liquid and perform water treatment, and then the water is circulated and transported to the waste heat boiler, enabling the waste heat boiler to produce high-pressure thermal steam for waste heat utilization and supplying the high-temperature and high-pressure steam to the steam turbine for steam power generation. It can realize the recyclability of water, achieve efficient energy conservation and emission reduction in power generation, and realize deep energy conservation and carbon reduction in the whole process of energy conversion.

[0047] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0048] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A coupling system based on hydrogen storage and retired thermal power assisting renewable energy power generation and grid connection, characterized in that, Comprising: An integrated-filtered electrolytic energy storage system for electrolyzing water to generate hydrogen and oxygen; A hydrogen-fueled gas-steam combined cycle power generation system, which includes a gas turbine and a steam turbine. The gas turbine uses the hydrogen and oxygen generated by the integrated-filtered electrolytic energy storage system for combustion to generate electricity; A water cycle reuse system, which includes a waste liquid treatment device, a waste heat boiler, and an exhaust gas purification device. The waste heat boiler is used to provide steam to the steam turbine to drive the steam turbine to generate electricity. The waste heat boiler is connected to the gas turbine and is used to recover the exhaust gas discharged by the gas turbine. The waste liquid treatment device is used to store and treat the exhausted steam discharged by the steam turbine and transport it to the waste heat boiler for reuse. The exhaust gas purification device is connected to the waste heat boiler and is used to treat the flue gas of the waste heat boiler.

2. The coupled system for assisting renewable energy power generation and grid connection based on hydrogen storage and retired thermal power according to claim 1, wherein Also including: A renewable energy power generation system for converting renewable energy into electrical energy. At least part of the electrical energy used by the integrated-filtered electrolytic energy storage system for electrolyzing water comes from the renewable energy power generation system.

3. The coupled system for hydrogen storage and retired thermal power-assisted renewable energy power generation grid connection according to claim 2, wherein The renewable energy power generation system includes a wind power generation set, a photovoltaic power generation set, and a biomass power generation set. The wind power generation set, the photovoltaic power generation set, and the biomass power generation set are respectively used to convert renewable wind energy, solar energy, and biomass energy into electrical energy.

4. The coupled system for assisting renewable energy power generation and grid connection based on hydrogen storage and retired thermal power according to claim 2, wherein The hydrogen-fueled gas-steam combined cycle power generation system is also provided with recycled retired thermal power facilities in a retired thermal power plant. The retired thermal power facilities include: A generator, and the power output ends of the gas turbine and the steam turbine are connected to the generator; A battery energy storage system for storing the electrical energy output by the generator. The first output end of the battery energy storage system is connected to the power grid for supplying power to the power grid.

5. The coupled system for assisting renewable energy power generation and grid connection based on hydrogen storage and retired thermal power according to claim 4, wherein The battery energy storage system is connected to the renewable energy power generation system for storing the electrical energy output by the renewable energy power generation system.

6. The coupled system based on hydrogen storage and retired thermal power assisting renewable energy power generation and grid connection according to claim 5, wherein, The second output end of the battery energy storage system is connected to the integrated-filtered electrolytic energy storage system for supplying power to the integrated-filtered electrolytic energy storage system.

7. The coupled system for assisting renewable energy power generation and grid connection based on hydrogen storage and retired thermal power according to claim 1, wherein The integrated-filtered electrolytic energy storage system includes: An electrolytic hydrogen production device for electrolyzing water to generate hydrogen and oxygen; An energy storage device for storing the hydrogen, oxygen, and waste liquid generated by the electrolytic hydrogen production device.

8. The coupled system based on hydrogen storage and retired thermal power assisting renewable energy power generation for grid connection according to claim 7, wherein, The integrated-filtered electrolytic energy storage system also includes: A digital filter for dividing the electrical energy required by the electrolytic hydrogen production device into a high-frequency electric power part and a low-frequency electric power part by using a first-order inertia filtering method; The electrolytic hydrogen production device includes an alkaline electrolytic cell and a proton exchange membrane electrolytic cell. The alkaline electrolytic cell is supplied with the low-frequency electric power part of the electrical energy, and the proton exchange membrane electrolytic cell is supplied with the high-frequency electric power part of the electrical energy.

9. The coupled system based on hydrogen storage and retired thermal power assisting renewable energy power generation for grid connection according to claim 7, wherein The energy storage device includes: A hydrogen storage tank for storing the hydrogen generated by the electrolytic hydrogen production device. The hydrogen storage tank is connected to the gas turbine; An oxygen storage tank for storing the oxygen generated by the electrolytic hydrogen production device. The oxygen storage tank is connected to the gas turbine.

10. The coupled system for assisting renewable energy power generation and grid connection based on hydrogen storage and retired thermal power according to claim 9, characterized in that, The energy storage device also includes: A liquid storage tank for storing the waste liquid generated by the electrolytic hydrogen production equipment. The liquid storage tank is connected to the waste liquid treatment equipment, and the waste liquid treatment equipment treats the waste liquid discharged from the liquid storage tank and transports it to the waste heat boiler for reuse.

Images