CN115021418A - Container type renewable energy electricity, heat and hydrogen co-production energy storage system and working method - Google Patents
Container type renewable energy electricity, heat and hydrogen co-production energy storage system and working method Download PDFInfo
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 190
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 190
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 178
- 238000004146 energy storage Methods 0.000 title claims abstract description 117
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- 230000005611 electricity Effects 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims description 9
- 238000010248 power generation Methods 0.000 claims abstract description 68
- 238000005338 heat storage Methods 0.000 claims abstract description 39
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 18
- 150000002431 hydrogen Chemical class 0.000 claims abstract description 11
- 210000004027 cell Anatomy 0.000 claims description 130
- 239000000446 fuel Substances 0.000 claims description 80
- 230000003197 catalytic effect Effects 0.000 claims description 63
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 58
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 53
- 239000001301 oxygen Substances 0.000 claims description 53
- 229910052760 oxygen Inorganic materials 0.000 claims description 53
- 239000007789 gas Substances 0.000 claims description 33
- 210000000352 storage cell Anatomy 0.000 claims description 22
- 238000001816 cooling Methods 0.000 claims description 21
- 238000002485 combustion reaction Methods 0.000 claims description 12
- 238000003487 electrochemical reaction Methods 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract 1
- 238000013461 design Methods 0.000 description 5
- 238000005485 electric heating Methods 0.000 description 5
- 230000017525 heat dissipation Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J15/00—Systems for storing electric energy
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/20—Wind motors characterised by the driven apparatus
- F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J15/00—Systems for storing electric energy
- H02J15/008—Systems for storing electric energy using hydrogen as energy vector
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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Abstract
The invention relates to the technical field of renewable energy devices, in particular to a container type renewable energy electricity, heat and hydrogen co-production energy storage system, which comprises a box body, wherein a wind energy power generation unit, a photovoltaic power generation unit and a direct current bus are arranged outside the box body; power converter locates in the box, wind power generation unit and photovoltaic power generation unit pass through direct current bus is connected with power converter, power converter is connected with auxiliary assembly and electric load, energy storage battery, electrolysis trough, energy storage battery is connected with heat exchanger A and heat storage tank, power converter conversion's electric energy is partly do auxiliary assembly and electric load provide electric power, and this container formula renewable energy electricity heat hydrogen coproduction energy storage system can the decoupling zero renewable energy power generation, produce hydrogen, heat production process, and the electric heat hydrogen of system is synthesized and is supplied with the flexibility ratio height, and renewable energy electricity generation and electric heat hydrogen load matching nature are good, and energy consumption rate and energy conversion rate are high, and different grade heat loads supply with the adaptability good.
Description
Technical Field
The invention relates to the technical field of renewable energy devices, in particular to a container type renewable energy electricity, heat and hydrogen co-production energy storage system and a working method.
Background
In order to solve the increasingly severe global warming problem, energy-saving and emission-reducing policy measures are proposed in all countries in the world, China vigorously promotes energy structure adjustment, reduces the use amount of fossil energy, improves the utilization thermal efficiency of the fossil energy, and improves the consumption proportion of renewable energy in primary energy.
The continents and sea areas in China are vast, quite abundant wind energy and solar energy resources are distributed in the three-north areas and coastal areas, according to the evaluation of meteorological departments, the development amount of wind energy at 70 m height on the land in China is 50 billion kilowatts, the theoretical storage amount of the land solar energy resources is 1.86 trillion kilowatts, and the total installed capacity of wind power and solar power generation in China reaches more than 12 billion kilowatts by 2030 years.
In the utilization of renewable energy, there are many technical difficulties: firstly, due to uncertainty of wind energy and solar energy resources, renewable energy power generation and user load cannot be matched; the uncertainty of wind energy and solar energy resources causes great fluctuation of electricity generation, and grid connection is difficult, so that a great amount of wind and light abandoning phenomena are caused; thirdly, the wind-solar power generation system is high in energy management difficulty and low in energy conversion utilization rate; the wind-solar hybrid power generation system can provide electric energy supply and hydrogen energy supply meeting requirements, but only can meet low-grade (lower than 100 ℃) heat supply by means of working heat dissipation of all parts in the system, and at present, a technology for meeting higher-grade (higher than 100 ℃) heat requirements is lacked.
Disclosure of Invention
Therefore, the invention mainly aims at the technical difficulties that the power generation and the user load are difficult to match, the system energy utilization rate is low, the requirement of high heat load cannot be met and the like in the utilization process of renewable energy sources such as wind energy, solar energy and the like in the prior art, so that the invention provides the container type renewable energy source electricity-heat-hydrogen co-generation energy storage system and the working method.
In order to solve the technical problem, the invention provides a container type renewable energy cogeneration of electric heat and hydrogen energy storage system, which comprises: the box body is externally provided with a wind energy power generation unit, a photovoltaic power generation unit and a direct current bus; the power converter is arranged in the box body, the wind power generation unit and the photovoltaic power generation unit are connected with the power converter through a direct current bus, the power converter is connected with auxiliary equipment, an electric load, an energy storage battery and an electrolytic cell, the energy storage battery is connected with the heat exchanger A and the heat storage tank, one part of electric energy converted by the power converter provides electric power for the auxiliary equipment and the electric load, the other part of electric energy is stored in the energy storage battery, heat in the energy storage battery is brought into the heat exchanger A through circulating cooling A, the heat is taken away after heat exchange, and then the electric energy enters the heat exchanger B for further heat exchange; the water treatment unit is connected with the electrolytic cell, the electric energy of the rest part of the power converter provides electric power for the electrolytic cell, water is electrolyzed by the electrolytic cell to generate hydrogen and oxygen and release a large amount of heat, the electrolytic cell is connected with the hydrogen storage tank and the oxygen storage tank, the hydrogen enters the hydrogen storage tank to be stored, the oxygen enters the oxygen storage tank to be stored, the heat of the electrolytic cell is brought into the heat exchanger B by the circulating cooling B, the heat is taken away by the low-temperature water after heat exchange and then enters the catalytic combustor to further exchange heat, and the grade of heat supply is improved; the hydrogen storage tank is connected with the fuel cell, a part of hydrogen in the hydrogen storage tank enters the fuel cell to generate electrochemical reaction to generate electric energy and simultaneously generate heat, the generated electric energy is supplied back to the direct current bus through the power converter, tail gas generated by the fuel cell enters the catalytic combustor to be combusted, the heat of residual hydrogen in the tail gas is released, the heat generated by the fuel cell is brought into the heat exchanger C through the circulating cooling C, the heat is taken away by the low-temperature water after heat exchange, the low-temperature water enters the catalytic combustor to further exchange heat, and the heat grade of the low-temperature water is improved; when a higher-grade heat load is needed, part of hydrogen is directly introduced from the hydrogen storage tank to the catalytic combustor for combustion and heat release, heat released by combustion of the hydrogen in the catalytic combustor is taken away by the preliminary heat exchange low-temperature water flowing in from the heat exchanger B and the heat exchanger C and is finally stored in the heat storage tank, and the heat storage tank is connected with the heat load.
Further, the number of the power converters is four, and the four power converters are respectively connected with auxiliary equipment, an electric load, an energy storage battery, an electrolysis bath and a fuel cell.
Further, the solar water heater further comprises a control cabinet, wherein the control cabinet is arranged in the box body and is connected with the wind power generation unit, the photovoltaic power generation unit, the water treatment unit, the electrolytic cell, the hydrogen storage tank, the fuel cell, the catalytic combustor, the heat storage tank, the energy storage cell, the auxiliary equipment, the heat exchanger A, the heat exchanger B, the heat exchanger C, the electric load, the heat load and the oxygen storage tank.
Further, the wind power generation unit, the photovoltaic power generation unit, the electrolysis bath, the fuel cell, the energy storage cell, the auxiliary equipment and the electrical load are connected through wires.
Further, the water treatment unit, the electrolytic cell, the hydrogen storage tank, the fuel cell, the catalytic burner, the heat storage tank, the heat exchanger A, the heat exchanger B, the heat exchanger C, the heat load and the oxygen storage tank are connected through pipelines.
Further, the heat exchanger A, the heat exchanger B, the heat exchanger C and the catalytic combustor are connected in series and in parallel through pipelines.
Further, the auxiliary equipment includes fan, water pump, motorised valve.
Furthermore, the wind power generation unit is a wind power generator, and the photovoltaic power generation unit is a photovoltaic generator.
Further, the hydrogen storage tank is a high-pressure hydrogen storage tank, and the oxygen storage tank is a high-pressure oxygen storage tank.
The invention also provides a working method of the container type renewable energy cogeneration of electric heat and hydrogen energy storage system, which is characterized by comprising the following steps:
the wind power generation unit and the photovoltaic power generation unit are connected with a direct current bus, the direct current bus is connected with a power converter arranged in the box body, the wind power generation unit and the photovoltaic power generation unit are connected with the power converter arranged in the box body through the direct current bus, the power converter is connected with auxiliary equipment, an electric load, an energy storage battery and an electrolytic bath, the energy storage battery exchanges heat with the heat storage tank through a heat exchanger A, one part of electric energy converted by the power converter provides electric power for the auxiliary equipment and the electric load, and the other part of the electric energy is stored in the energy storage battery; the water treatment unit is connected with the electrolytic cell, the rest electric energy of the power converter provides electric power for the electrolytic cell, hydrogen, oxygen and heat are generated by water after electrolysis of the electrolytic cell, the hydrogen enters the hydrogen storage tank for storage, the oxygen enters the oxygen storage tank for storage, and the heat enters the heat exchanger B through the circulating cooling B for heat exchange and then is taken away; a part of hydrogen in the hydrogen storage tank enters a fuel cell to generate electrochemical reaction to generate electric energy, the generated electric energy is supplied back to a direct current bus through a power converter, tail gas generated by the fuel cell enters a catalytic combustor to be combusted, heat of residual hydrogen in the tail gas is released, the heat released by the fuel cell enters a heat exchanger C through circulating cooling C and is taken away, then the tail gas enters the catalytic combustor, heat in the heat exchanger A, the heat exchanger B, the heat exchanger C and the catalytic combustor is taken into a heat storage tank through circulating cooling D, and the heat storage tank is connected with a heat load;
according to the magnitude of renewable energy power generation and user side electric load demand, the operation mode of the system can be divided into two modes, namely: when the generated energy of the renewable energy is larger than the electric load demand of a user side, the fuel cell stops running, redundant electric quantity firstly charges the energy storage cell to ensure that the energy storage cell is in a full state, and after the energy storage cell is fully charged, the redundant electric quantity is used for hydrogen production by electrolysis of the electrolytic cell, and generated hydrogen is stored in the high-pressure hydrogen storage tank; if the heat supply grade in the system is lower than the heat load requirement, the hydrogen in the high-pressure hydrogen storage tank is introduced into the catalytic combustor to be combusted and release heat so as to improve the heat supply grade; and a second mode: when the renewable energy generated energy is less than the user side electric load demand, the electrolysis trough stops working, fuel cell utilizes the hydrogen in the hydrogen storage tank to produce the electric energy, the electric energy that produces is returned and is supplied to the direct current generating line, be used for user's electric load and system auxiliary assembly power consumption demand, also can charge for energy storage battery, fuel cell tail gas lets in catalytic combustor, the heat of hydrogen in the abundant release tail gas, equally, can not satisfy the user demand when current heat supply grade, directly let in catalytic combustor with the hydrogen of high pressure hydrogen storage tank and burn and improve the heat supply grade. The electrolysis bath and the fuel cell can not work simultaneously, the energy storage cell can support the dynamic smooth transition of the electrolysis bath and the fuel cell when the renewable energy fluctuates, and the energy storage cell can also provide power load for users.
The technical scheme of the invention has the following advantages:
1. the invention provides a container type renewable energy electric heating hydrogen co-production energy storage system, which comprises: the box body is externally provided with a wind energy power generation unit, a photovoltaic power generation unit and a direct current bus; the power converter is arranged in the box body, the wind power generation unit and the photovoltaic power generation unit are connected with the power converter through a direct current bus, the power converter is connected with auxiliary equipment, an electric load, an energy storage battery and an electrolytic cell, the energy storage battery is connected with the heat exchanger A and the heat storage tank, one part of electric energy converted by the power converter provides electric power for the auxiliary equipment and the electric load, the other part of electric energy is stored in the energy storage battery, heat in the energy storage battery is brought into the heat exchanger A through circulating cooling A, the heat is taken away after heat exchange, and then the electric energy enters the heat exchanger B for further heat exchange; the water treatment unit is connected with the electrolytic cell, the electric energy of the rest part of the power converter provides electric power for the electrolytic cell, water is electrolyzed by the electrolytic cell to generate hydrogen and oxygen and release a large amount of heat, the electrolytic cell is connected with the hydrogen storage tank and the oxygen storage tank, the hydrogen enters the hydrogen storage tank to be stored, the oxygen enters the oxygen storage tank to be stored, the heat of the electrolytic cell is brought into the heat exchanger B by the circulating cooling B, the heat is taken away by the low-temperature water after heat exchange and then enters the catalytic combustor to further exchange heat, and the heat grade is improved; the hydrogen storage tank is connected with the fuel cell, a part of hydrogen in the hydrogen storage tank enters the fuel cell to generate electrochemical reaction to generate electric energy and simultaneously generate heat, the generated electric energy is supplied back to the direct current bus through the power converter, tail gas generated by the fuel cell enters the catalytic combustor to be combusted, the heat of residual hydrogen in the tail gas is released, the heat generated by the fuel cell is brought into the heat exchanger C through the circulating cooling C, the heat is taken away by the low-temperature water after heat exchange, and the low-temperature water enters the catalytic combustor to further exchange heat, so that the heat grade is improved; when a higher-grade heat load is needed, part of hydrogen is directly introduced from the hydrogen storage tank to the catalytic combustor for combustion and heat release, heat released by combustion of the hydrogen in the catalytic combustor is taken away by the preliminary heat exchange low-temperature water flowing in from the heat exchanger B and the heat exchanger C and is finally stored in the heat storage tank, and the heat storage tank is connected with the heat load.
The container type renewable energy electric heat and hydrogen co-production energy storage system stores electric energy by adopting the energy storage battery, and is convenient for restarting the system when the container type renewable energy electric heat and hydrogen co-production energy storage system is shut down due to faults and is shut down in severe weather. Meanwhile, the catalytic combustor is adopted to combust the tail gas of the fuel cell and the hydrogen in the hydrogen storage tank, so that on one hand, the energy of the hydrogen which is not utilized in the tail gas of the fuel cell is fully utilized, the integral heat efficiency of the system is improved, the heat energy supply of different grades of heat grades is met, and on the other hand, the power generation of the fuel cell and the heat supply of the system are decoupled; the container type renewable energy electric heat hydrogen co-production energy storage system recovers the heat of the energy storage battery, the fuel battery and the electrolytic cell, and improves the overall heat efficiency of the system; this container formula renewable energy electricity heat hydrogen coproduction energy storage system locates each part in the box, adopts container formula integrated design, improves the security and the compactedness of system, the transportation of the system of being convenient for. This container formula renewable energy electricity heat hydrogen coproduction energy storage system can decouple the renewable energy and produce electricity, produce hydrogen, heat production process, and the energy supply flexibility ratio of system is high, and then has improved matching nature, energy rate of consumption, heat load flexibility ratio.
The size of the container type renewable energy electric heating hydrogen co-production energy storage system is determined according to the wind and light consumption level, if the wind and light consumption level is low, the size of the container type renewable energy electric heating hydrogen co-production energy storage system is small, and the whole system can be integrated in a container; if the wind and light consumption level is high, the system is large in size, and components except the heat storage tank and the hydrogen storage tank can be optionally integrated in one container. All the parts are reasonably arranged on the container space, the structure is compact, the occupied area is small, and the transportation can be flexible; the container type design is convenient for transportation and management. The invention realizes the large-scale utilization of renewable energy sources, reduces the carbon emission to the environment and effectively solves the problem of continuous and stable energy source supply in remote areas.
2. According to the container type renewable energy electric heat and hydrogen co-production energy storage system provided by the invention, the heat exchanger A, the heat exchanger B, the heat exchanger C and the catalytic combustor are connected in series and parallel through pipelines, so that heat in the energy storage battery, the electrolytic cell and the fuel cell and combustion heat release in the catalytic combustor are brought into the heat storage tank; the heat exchanger A, the heat exchanger B, the heat exchanger C and the catalytic combustor are connected in series and in parallel reasonably, so that the pipeline redundancy is reduced, and the compactness of the system is improved.
This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the disclosure, nor is it intended to be used to limit the scope of the disclosure.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic flow diagram of a container type renewable energy cogeneration energy storage system provided by the invention;
fig. 2 is a layout diagram of components of the container type renewable energy cogeneration of electricity, heat and hydrogen energy storage system provided by the invention.
Description of reference numerals:
1. a wind power generation unit; 2. a photovoltaic power generation unit; 3. a water treatment unit; 4. an electrolytic cell; 5. a hydrogen storage tank; 6. a fuel cell; 7. a catalytic combustor; 8. a heat storage tank; 9. an energy storage battery; 10. an auxiliary device; 11. a heat exchanger A; 12. a heat exchanger B; 13. a heat exchanger C; 14. An electrical load; 15. a thermal load; 16. an oxygen storage tank.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Referring to fig. 1 to 2, the present invention provides a container type renewable energy cogeneration of heat and hydrogen energy storage system, comprising: the photovoltaic power generation device comprises a box body, wherein a wind power generation unit 1, a photovoltaic power generation unit 2 and a direct current bus are arranged outside the box body; the power supply converter is arranged in the box body, the wind power generation unit 1 and the photovoltaic power generation unit 2 are connected with the power supply converter through the direct current bus, the power supply converter is connected with the auxiliary equipment 10, the electric load 14, the energy storage battery 9 and the electrolytic cell 4, the energy storage battery 9 is connected with the heat exchanger A11, the heat exchanger A11 is connected with the heat storage tank 8, and heat in the energy storage battery 9 is taken away through the heat exchanger A11; one part of the electric energy converted by the power converter provides electric power for the auxiliary equipment 10 and the electric load 14, the other part of the electric energy is stored in the energy storage battery 9, heat in the energy storage battery 9 is brought into a heat exchanger A11 through circulating cooling A, and is taken away after heat exchange, and then enters a heat exchanger B for further heat exchange; the water treatment unit 3 is connected with the electrolytic cell 4, the rest electric energy of the power converter provides electric power for the electrolytic cell 4, water is electrolyzed by the electrolytic cell 4 to generate hydrogen and oxygen, and a large amount of heat is released, the electrolytic cell 4 is connected with a hydrogen storage tank 5 and an oxygen storage tank 16, the hydrogen enters the hydrogen storage tank 5 for storage, the oxygen enters the oxygen storage tank 16 for storage, the oxygen enters the oxygen storage tank for storage, the heat of the electrolytic cell is brought into a heat exchanger B12 by a circulating cooling B, the heat is taken away by low-temperature water after heat exchange, and then enters the catalytic combustor 7 for further heat exchange, so that the heat grade is improved; the hydrogen storage tank 5 is connected with the fuel cell 6, a part of hydrogen in the hydrogen storage tank 5 enters the fuel cell 6 to generate electrochemical reaction to generate electric energy and generate heat, the generated electric energy is supplied back to the direct current bus through the power converter, tail gas generated by the fuel cell 6 enters the catalytic combustor 7 to be combusted, the heat of residual hydrogen in the tail gas is released, the heat generated by the fuel cell 6 is brought into the heat exchanger C13 through the circulating cooling C, the heat is taken away by low-temperature water after heat exchange, and the low-temperature water enters the catalytic combustor 7 to further exchange heat, so that the heat grade is improved;
when a higher-grade heat load is needed, a part of hydrogen is directly introduced from the hydrogen storage tank 5 to the catalytic combustor 7 for combustion and heat release, heat released by combustion of the hydrogen in the catalytic combustor 7 is taken away by the primary heat exchange low-temperature water flowing from the heat exchanger B12 and the heat exchanger C13 and is finally stored in the heat storage tank 8, and the heat storage tank 8 is connected with the heat load 15.
Wind energy and solar energy respectively generate electric energy in the wind energy generating unit 1 and the photovoltaic generating unit 2, one part of the electric energy is supplied to the auxiliary equipment 10 and the electric load 14 through the power supply converter, the other part of the electric energy is stored in the energy storage battery 9, the heat energy released by the energy storage battery 9 is taken away through the heat exchanger A11, and the rest part of the electric energy is supplied to the electrolytic tank 4 to electrolyze water to prepare hydrogen. Outside water gets into electrolysis trough 4 after water treatment unit 3 purifies, produces hydrogen, oxygen and heat through electrolysis trough 4 electrolysis aquatic products, and hydrogen lets in hydrogen storage tank 5 and stores, and hydrogen can also be exported, is connected with other external equipment to utilize. The oxygen is introduced into the oxygen storage tank for storage, and the oxygen can be output, connected with other external equipment and utilized. Part of oxygen can be introduced into the catalytic combustor 7 for oxygen-enriched combustion, and heat is taken away by primarily heated low-temperature water flowing into the heat exchanger B and the heat exchanger C; hydrogen in the hydrogen storage tank 5 is introduced into the fuel cell 6 to generate electricity, electric energy generated by the fuel cell 6 is supplied back to the direct current bus, tail gas of the fuel cell 6 is introduced into the catalytic combustor 7 to be combusted to release heat in the residual hydrogen, and the heat of the fuel cell 6 is taken away through the heat exchanger C; the catalytic combustor 7 can burn the tail gas of the fuel cell 6 and the hydrogen in the hydrogen storage tank 5, and the released heat energy is stored in the heat storage tank 8, so that the residual energy in the tail gas can be fully utilized, the overall efficiency of the system is improved, and the hydrogen input from the hydrogen storage tank 5 can be additionally burnt according to the user requirements to supply higher-grade heat energy.
The container type renewable energy electric heat and hydrogen co-production energy storage system stores electric energy by the energy storage battery 9, and is convenient for restarting the system when the container type renewable energy electric heat and hydrogen co-production energy storage system is shut down due to faults and is shut down in severe weather. Meanwhile, the catalytic combustor 7 is adopted to combust the tail gas of the fuel cell 6 and the hydrogen in the hydrogen storage tank 5, so that on one hand, the energy of the hydrogen which is not utilized in the tail gas of the fuel cell 6 is fully utilized, the integral heat efficiency of the system is improved, and the heat energy supply of different grades of heat grades is met; on the other hand, the power generation and the system heat supply of the fuel cell 6 are decoupled; the container type renewable energy electric heat and hydrogen co-production energy storage system recovers the heat dissipation of the energy storage battery 9, the fuel battery 6 and the electrolytic cell 4, and improves the overall heat efficiency of the system; this container formula renewable energy electricity heat hydrogen coproduction energy storage system locates each part in the box, adopts container formula integrated design, improves the security and the compactedness of system, the transportation of the system of being convenient for. This container formula renewable energy electricity heat hydrogen coproduction energy storage system can decouple the renewable energy and produce electricity, produce hydrogen, heat production process, and the energy supply flexibility ratio of system is high, and then has improved matching nature, energy rate of consumption, heat load flexibility ratio.
The size of the container type renewable energy electric heating hydrogen co-production energy storage system is determined according to the wind and light consumption level, if the wind and light consumption level is low, the size of the container type renewable energy electric heating hydrogen co-production energy storage system is small, and the whole system can be integrated in a container; if the wind and light absorption level is high, the system is large in size, components except the heat storage tank 8 and the hydrogen storage tank 5 can be integrated in one container, the components are reasonably arranged in the container space, the structure is compact, the occupied area is small, and the system can be flexibly transported; the container type design is convenient for transportation and management. The invention realizes the large-scale utilization of renewable energy sources, reduces the carbon emission to the environment and effectively solves the problem of continuous and stable energy supply in remote areas.
Meanwhile, the form of renewable energy is not limited to the described wind energy and solar energy, and may be other forms of renewable energy such as biomass energy, water potential energy, tidal current energy, and the like, or a combination of renewable energy.
In some alternative embodiments, there are four power converters, the first of which is connected to the auxiliary equipment 10 and the electrical load 14, the second of which is connected to the energy storage battery 9, the third of which is connected to the electrolysis cell 4, and the fourth of which is connected to the fuel cell 6.
In some optional embodiments, the container type renewable energy cogeneration energy storage system further comprises a control cabinet, the control cabinet is arranged in the box body, and the control cabinet is connected with the wind power generation unit 1, the photovoltaic power generation unit 2, the water treatment unit 3, the electrolytic cell 4, the hydrogen storage tank 5, the fuel cell 6, the catalytic combustor 7, the heat storage tank 8, the energy storage cell 9, the auxiliary equipment 10, the heat exchanger a11, the heat exchanger B12, the heat exchanger C13, the electric load 14, the heat load 15 and the oxygen storage tank 16; the control cabinet is used for controlling the wind power generation unit 1, the photovoltaic power generation unit 2, the water treatment unit 3, the electrolytic cell 4, the hydrogen storage tank 5, the fuel cell 6, the catalytic combustor 7, the heat storage tank 8, the energy storage cell 9, the auxiliary equipment 10, the heat exchanger A11, the heat exchanger B12, the heat exchanger C13, the electric load 14, the heat load 15 and the oxygen storage tank 16, so that the operation of the container type renewable energy cogeneration energy storage system is accurately controlled.
In some alternative embodiments, the wind power generation unit 1, the photovoltaic power generation unit 2, the electrolyzer 4, the fuel cell 6, the energy storage battery 9, the auxiliary equipment 10 and the electrical load 14 are connected by wires; thereby realizing the connection of the wind power generation unit 1, the photovoltaic power generation unit 2, the electrolytic bath 4, the fuel cell 6, the energy storage battery 9, the auxiliary equipment 10 and the electric load 14. The electrical load 14 is an electrical load, that is, an external device connected to the power converter.
In some alternative embodiments, the water treatment unit 3, the electrolysis tank 4, the hydrogen storage tank 5, the fuel cell 6, the catalytic burner 7, the heat storage tank 8, the heat exchanger a11, the heat exchanger B12, the heat exchanger C13, the thermal load 15, and the oxygen storage tank 16 are connected by piping. The heat exchanger A11, the heat exchanger B12 and the heat exchanger C13 are used for respectively taking away heat in the energy storage battery 9, the electrolytic cell 4 and the fuel cell 6, the waste heat is further utilized, and the overall heat efficiency of the system is improved. Specifically, the heat exchanger A11, the heat exchanger B12, the heat exchanger C13 and the catalytic combustor 7 are connected in series and parallel, and heat in the energy storage battery 9, the electrolytic cell 4 and the fuel cell and heat released by combustion in the catalytic combustor 7 are brought into the heat storage tank 8; the heat exchanger A11, the heat exchanger B12, the heat exchanger C13 and the catalytic combustor 7 are reasonably connected in series and in parallel, so that the pipeline redundancy is reduced, and the compactness of the system is improved.
In some alternative embodiments, the auxiliary device 10 comprises a fan and a water pump; of course, the auxiliary device 10 may also include other structures, such as solenoid valves, manual valves, check valves, etc.
In the present embodiment, the wind power generation unit 1 is a wind power generator, and the photovoltaic power generation unit 2 is a photovoltaic power generator.
In the present embodiment, the hydrogen tank 5 is a high-pressure hydrogen tank 5, and the oxygen tank 16 is a high-pressure oxygen tank 16.
The invention also provides a working method of the container type renewable energy cogeneration of electric heat and hydrogen energy storage system, which comprises the following steps: the wind power generation unit 1 and the photovoltaic power generation unit 2 are connected with a direct current bus, the direct current bus is connected with a power converter arranged in a box body, the wind power generation unit 1 and the photovoltaic power generation unit 2 are connected with the power converter arranged in the box body through the direct current bus, the power converter is connected with auxiliary equipment 10, an electric load 14, an energy storage battery 9 and an electrolytic bath 4, the energy storage battery 9 exchanges heat with a heat storage tank 8 through a heat exchanger A11, one part of electric energy converted by the power converter provides electric power for the auxiliary equipment 10 and the electric load 14, and the other part of electric energy is stored in the energy storage battery 9; the water treatment unit 3 is connected with the electrolytic cell 4, the rest electric energy of the power converter provides electric power for the electrolytic cell 4, hydrogen, oxygen and heat are generated by water after electrolysis of the electrolytic cell 4, the hydrogen enters the hydrogen storage tank 5 for storage, the oxygen enters the oxygen storage tank 16 for storage, and the heat enters the heat exchanger B12 for heat exchange through the circulating cooling B and is taken away; a part of hydrogen in the hydrogen storage tank 5 enters the fuel cell 6 to be combusted, the generated electric energy is supplied back to the direct current bus through the power converter, tail gas generated by the fuel cell 6 enters the catalytic combustor 7 to be combusted, heat of residual hydrogen in the tail gas is released, the heat released by the fuel cell 6 enters the heat exchanger C13 through the circulating cooling C and is taken away, and then enters the catalytic combustor 7, the heat in the heat exchanger A11, the heat exchanger B12, the heat exchanger C13 and the catalytic combustor 7 is taken into the heat storage tank 8 through the circulating cooling D, and the heat storage tank 8 is connected with the heat load 15; when the generated energy of the renewable energy is larger than the electric load demand of a user side, the fuel cell 6 stops running at the moment, redundant electric quantity firstly charges the energy storage cell 9 to ensure that the energy storage cell 9 is in a full state, when the energy storage cell 9 is fully charged, the redundant electric quantity is used for the electrolytic hydrogen production of the electrolytic cell 4, and the generated hydrogen is stored in the high-pressure hydrogen storage tank 16; if the grade of the heat produced in the system is lower than the requirement of heat load, the hydrogen in the high-pressure hydrogen storage tank 16 is introduced into the catalytic combustor 7 to be combusted for heat supply; when the generated energy of the renewable energy is smaller than the demand of the user side electric load, the electrolytic cell 4 stops working, the fuel cell 6 utilizes the hydrogen in the hydrogen storage tank to generate electric energy, the generated electric energy is supplied back to the direct current bus for the demand of the user electric load and the system auxiliary equipment, and can also charge the energy storage cell 9, the tail gas of the fuel cell 6 is introduced into the catalytic combustor 7 to fully release the heat of the hydrogen in the tail gas, and when the existing heat can not meet the demand of the user, the hydrogen in the high-pressure hydrogen storage tank 16 is directly introduced into the catalytic combustor 7 to be combusted and supplied with heat; the electrolytic cell 4 and the fuel cell 6 do not work simultaneously, the energy storage cell 9 can support the dynamic smooth transition of the electrolytic cell 4 and the fuel cell 6 when the renewable energy fluctuates, and the energy storage cell 9 can also provide power load for users.
The specific working method of the container type renewable energy electric heat hydrogen co-production energy storage system comprises the following steps: wind energy and solar energy respectively generate electric energy in the wind energy generating unit 1 and the photovoltaic generating unit 2, one part of the electric energy is supplied to the auxiliary equipment 10 and the electric load 14 through the power supply converter, the other part of the electric energy is stored in the energy storage battery 9, the heat energy released by the energy storage battery 9 is stored in the heat storage tank 8 through the heat exchanger A11, and the rest part of the electric energy is supplied to the electrolytic tank 4 to electrolyze water to prepare hydrogen. Outside water gets into electrolysis trough 4 after water treatment unit 3 purifies, produces hydrogen, oxygen and heat through electrolysis trough 4 electrolysis aquatic products, and hydrogen lets in hydrogen storage tank 5 and stores, and hydrogen can also be exported, is connected with other external equipment to utilize. The oxygen is introduced into the oxygen storage tank for storage, and the oxygen can be output, connected with other external equipment and utilized. A part of oxygen can be introduced into the catalytic combustor 7 for oxygen enrichment combustion, and heat can be stored in the heat storage tank 8 through a heat exchanger B12; hydrogen in the hydrogen storage tank 5 is introduced into the fuel cell 6 to generate electricity, electric energy generated by the fuel cell 6 is introduced into the direct current bus, tail gas of the fuel cell 6 is introduced into the catalytic combustor 7 to combust and release heat in the residual hydrogen, and the heat of the fuel cell 6 can be stored in the heat storage tank 8 through the heat exchanger C13; the catalytic combustor 7 can burn the tail gas of the fuel cell 6 and the hydrogen in the hydrogen storage tank 5, and the released heat energy is stored in the heat storage tank 8, so that the residual energy in the tail gas can be fully utilized, the overall efficiency of the system is improved, and the hydrogen input from the hydrogen storage tank 5 can be additionally burnt according to the user requirements to supply higher-grade heat energy.
The container type renewable energy electric heat and hydrogen co-production energy storage system stores electric energy by the energy storage battery 9, and is convenient for restarting the system when the container type renewable energy electric heat and hydrogen co-production energy storage system is shut down due to faults and is shut down in severe weather. Meanwhile, the catalytic combustor 7 is adopted to combust the tail gas of the fuel cell 6 and the hydrogen in the hydrogen storage tank 5, so that on one hand, the energy of the hydrogen which is not utilized in the tail gas of the fuel cell 6 is fully utilized, the overall thermal efficiency of the system is improved, and the heat energy supply with different grades of heat grades is met; on the other hand, the power generation and the system heat supply of the fuel cell 6 are decoupled; the container type renewable energy electric heat and hydrogen co-production energy storage system recovers the heat dissipation of the energy storage battery 9, the fuel battery 6 and the electrolytic cell 4, and improves the overall heat efficiency of the system; this container formula renewable energy electricity heat hydrogen coproduction energy storage system locates each part in the box, adopts container formula integrated design, improves the security and the compactedness of system, the transportation of the system of being convenient for. The container type renewable energy electric heat and hydrogen co-production energy storage system can decouple the electricity, hydrogen and heat production processes of renewable energy, and the energy supply flexibility of the system is high.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. The utility model provides a container formula renewable energy electricity heat hydrogen coproduction energy storage system which characterized in that includes:
the box body is externally provided with a wind energy power generation unit (1), a photovoltaic power generation unit (2) and a direct current bus;
the power supply converter is arranged in the box body, the wind power generation unit (1) and the photovoltaic power generation unit (2) are connected with the power supply converter through a direct current bus, the power supply converter is connected with auxiliary equipment (10), an electric load (14), an energy storage battery (9) and an electrolytic bath (4), the energy storage battery (9) is connected with a heat exchanger A (11) and a heat storage tank (8), one part of electric energy converted by the power supply converter provides electric power for the auxiliary equipment (10) and the electric load (14), the other part of electric energy is stored in the energy storage battery (9), heat in the energy storage battery (9) is brought into the heat exchanger A (11) through circulating cooling A, the heat is taken away by low-temperature water after heat exchange, and the low-temperature water enters a heat exchanger B for further heat exchange;
the water treatment unit (3) is connected with the electrolytic cell (4), the electric energy of the rest part of the power converter provides electric power for the electrolytic cell (4), water is electrolyzed by the electrolytic cell (4) to generate hydrogen and oxygen, and a large amount of heat is released, the electrolytic cell (4) is connected with the hydrogen storage tank (5) and the oxygen storage tank (16), the hydrogen enters the hydrogen storage tank (5) for storage, the oxygen enters the oxygen storage tank (16) for storage, the heat of the electrolytic cell (4) is brought into the heat exchanger B (12) by the circulating cooling B, the heat is taken away by the low-temperature water after heat exchange, the low-temperature water enters the catalytic combustor (7) for heat absorption, and the hot product level of the low-temperature water is further improved;
the hydrogen storage tank (5) is connected with the fuel cell (6), a part of hydrogen in the hydrogen storage tank (5) enters the fuel cell (6) to generate electrochemical reaction to generate electric energy and generate heat, the generated electric energy is supplied back to the direct current bus through the power converter, tail gas generated by the fuel cell (6) enters the catalytic combustor (7) to be combusted, the heat of residual hydrogen in the tail gas is released, the heat generated by the fuel cell (6) is brought into the heat exchanger C (13) through the circulating cooling C, the heat is taken away by the low-temperature water after heat exchange, the low-temperature water enters the catalytic combustor (7) again to exchange heat, and the hot product level of the low-temperature water is further improved;
when a heat load with higher heat grade is needed, a part of hydrogen is directly introduced from the hydrogen storage tank (5) to the catalytic combustor (7) for combustion and heat release, the heat released by the combustion of the hydrogen in the catalytic combustor (7) is taken away by the primary heat exchange low-temperature water flowing from the heat exchanger B (12) and the heat exchanger C (13) and finally stored in the heat storage tank (8), and the heat storage tank (8) is connected with the heat load (15).
2. A container type renewable energy cogeneration energy storage system of hydrogen and heat according to claim 1, characterized in that the number of power converters is four, and the four power converters are respectively connected with the auxiliary equipment (10) and the electric load (14), the energy storage battery (9), the electrolyzer (4), and the fuel cell (6).
3. A container type renewable energy electric heat and hydrogen co-production energy storage system according to claim 3, characterized by further comprising a control cabinet, wherein the control cabinet is arranged in the box body, and is connected with the wind power generation unit (1), the photovoltaic power generation unit (2), the water treatment unit (3), the electrolytic cell (4), the hydrogen storage tank (5), the fuel cell (6), the catalytic combustor (7), the heat storage tank (8), the energy storage battery (9), the auxiliary equipment (10), the heat exchanger a (11), the heat exchanger B (12), the heat exchanger C (13), the electric load (14), the heat load (15) and the oxygen storage tank (16).
4. A container type renewable energy electric heat and hydrogen co-generation energy storage system according to any one of claims 1 to 3, characterized in that the wind power generation unit (1), the photovoltaic power generation unit (2), the electrolyzer (4), the fuel cell (6), the energy storage cell (9), the auxiliary equipment (10) and the electric load (14) are connected by electric wires.
5. A container type renewable energy cogeneration energy storage system of hydrogen and heat according to claim 4, wherein the water treatment unit (3), the electrolytic cell (4), the hydrogen storage tank (5), the fuel cell (6), the catalytic burner (7), the heat storage tank (8), the heat exchanger A (11), the heat exchanger B (12), the heat exchanger C (13), the heat load (15) and the oxygen storage tank (16) are connected by a pipeline.
6. A container type renewable energy electric heat and hydrogen co-generation energy storage system according to claim 5, characterized in that the heat exchanger A (11), the heat exchanger B (12), the heat exchanger C (13) and the catalytic combustor (7) are connected in series and parallel.
7. A container type renewable energy cogeneration energy storage system of electric heat and hydrogen according to claim 6, characterized in that the auxiliary equipment (10) comprises a fan, a water pump, an electric valve.
8. A container type renewable energy electricity, heat and hydrogen co-generation energy storage system according to any one of claims 5 to 7, characterized in that the wind power generation unit (1) is a wind power generator and the photovoltaic power generation unit (2) is a photovoltaic generator.
9. A container type renewable energy cogeneration energy storage system of hydrogen and heat according to claim 8, wherein the hydrogen storage tank (5) is a high pressure hydrogen storage tank (5) and the oxygen storage tank (16) is a high pressure oxygen storage tank (16).
10. A method of operating a container-type renewable energy cogeneration energy storage system according to any one of claims 1 to 9, comprising the steps of:
the wind power generation unit (1) and the photovoltaic power generation unit (2) are connected with a direct current bus, the direct current bus is connected with a power converter arranged in a box body, the wind power generation unit (1) and the photovoltaic power generation unit (2) are connected with the power converter arranged in the box body through the direct current bus, the power converter is connected with auxiliary equipment (10), an electric load (14), an energy storage battery (9) and an electrolytic cell (4), the energy storage battery (9) exchanges heat with a heat storage tank (8) through a heat exchanger A (11), one part of electric energy converted by the power converter provides electric power for the auxiliary equipment (10) and the electric load (14), and the other part of electric energy is stored in the energy storage battery (9); the water treatment unit (3) is connected with the electrolytic bath (4), the rest electric energy of the power supply converter provides electric power for the electrolytic bath (4), water is electrolyzed by the electrolytic bath (4) to generate hydrogen, oxygen and heat, the hydrogen enters the hydrogen storage tank (5) for storage, the oxygen enters the oxygen storage tank (16) for storage, and the heat is taken away after entering the heat exchanger B (12) for heat exchange through the circulating cooling B; a part of hydrogen in the hydrogen storage tank (5) enters a fuel cell (6) to generate electrochemical reaction to generate electric energy, the generated electric energy is supplied back to a direct current bus through a power converter, tail gas generated by the fuel cell (6) enters a catalytic combustor (7) to be combusted, heat of residual hydrogen in the tail gas is released, the heat released by the fuel cell (6) enters a heat exchanger C (13) through circulating cooling C and then is taken away by low-temperature water, the low-temperature water enters the catalytic combustor (7) to absorb heat, the circulating cooling D brings heat in the heat exchanger A (11), the heat exchanger B (12), the heat exchanger C (13) and the catalytic combustor (7) into a heat storage tank (8), and the heat storage tank (8) is connected with a heat load (15);
according to the magnitude of renewable energy power generation and user side electric load demand, the operation mode of the system can be divided into two modes, namely: when the generated energy of the renewable energy is larger than the electric load demand of a user side, the fuel cell (6) stops running, redundant electric quantity firstly charges the energy storage cell (9) to ensure that the energy storage cell (9) is in a full state, after the energy storage cell (9) is fully charged, the redundant electric quantity is used for the electrolysis cell (4) to electrolyze to produce hydrogen, and the generated hydrogen is stored in the high-pressure hydrogen storage tank (16); if the heat supply grade in the system is lower than the heat load requirement, the hydrogen in the high-pressure hydrogen storage tank (16) is introduced into the catalytic combustor (7) to be combusted and release heat so as to improve the heat supply grade; and a second mode: when the generated energy of the renewable energy is smaller than the demand of the electric load on the user side, the electrolytic cell (4) stops working, the fuel cell (6) utilizes the hydrogen in the hydrogen storage tank to generate electric energy, the generated electric energy is supplied back to the direct current bus for the demand of the electric load of the user and the electric load of the system auxiliary equipment, and can also charge the energy storage cell (9), the tail gas of the fuel cell (6) is introduced into the catalytic combustor (7) to fully release the heat of the hydrogen in the tail gas, and similarly, when the existing heat supply grade can not meet the demand of the user, the hydrogen in the high-pressure hydrogen storage tank (16) is directly introduced into the catalytic combustor (7) to be combusted to improve the heat supply grade; the electrolytic cell (4) and the fuel cell (6) do not work simultaneously, the energy storage cell (9) can support the dynamic smooth transition of the electrolytic cell (4) and the fuel cell (6) when the renewable energy fluctuates, and the energy storage cell (9) can also provide power load for users.
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