Nuclear wind, light and hydrogen power generation co-production system and working method thereof

Abstract

The invention discloses a nuclear wind, light and hydrogen power generation co-production system and a working method thereof, and the system comprises an electrical load, a pressurized water reactor power generation device, a photovoltaic power generation device, an electrolytic cell hydrogen production device and a fuel cell-gas turbine power generation device, the photovoltaic power generation device is connected with the pressurized water reactor power generation device, the electrolytic cell hydrogen production device and the fuel cell-gas turbine power generation device, and the electrolytic cell hydrogen production device is connected with the fuel cell-gas turbine power generation device. And the electrical load is connected with the pressurized water reactor power generation device, the photovoltaic power generation device, the electrolytic cell hydrogen production device and the fuel cell-gas turbine power generation device. According to the system and the working method thereof, hydrogen is used as an energy carrier to carry out nuclear-wind energy hydrogen storage power generation co-production.

Description

Technical Field

[0001] The present invention belongs to the technical field of nuclear power for hydrogen production, and relates to a nuclear-wind-solar-hydrogen combined power generation system and its working method. Background Art

[0002] The utilization of nuclear energy is an important support for building a new power system, and it has significant advantages in terms of technical maturity, economy, and sustainability. In recent years, the installed capacity of nuclear power in China has been continuously increasing. As of 2022, the installed scale of nuclear power in China reached 55.63 million kilowatts, accounting for 2.2% of the total installed power supply. As a clean energy source, nuclear energy can provide electricity for large-scale hydrogen production. The nuclear reactor can be coupled with wind-solar-hydrogen storage to improve the reliability, flexibility, and economy of the power supply system.

[0003] China has rich onshore wind power resources. The total reserves of onshore wind energy resources at a height of 10m above the ground are about 4.35 billion kW, ranking first in the world. In recent years, the cost of renewable energy has decreased significantly. In 2022, the cost per kilowatt-hour of onshore wind power in China was about 0.17 yuan / kWh. The economic benefits of using onshore wind power to produce hydrogen have been significantly improved. Focus on the development of renewable energy for hydrogen production, and strictly control hydrogen production from fossil energy. By 2025, the hydrogen production from renewable energy will reach 100,000 - 200,000 tons / year, becoming an important part of the newly added hydrogen energy consumption.

[0004] The large consumption of fossil energy has brought environmental pollution problems. Hydrogen energy has the advantages of rich resources, high calorific value, efficient conversion into other forms of energy, and no harmful emissions in its products. It is a recognized clean energy source. Hydrogen energy is gradually becoming an important link to promote the clean and efficient utilization of traditional fossil energy and support the large-scale development of renewable energy. In addition, relying on devices such as gas turbines or fuel cells, hydrogen energy can be efficiently and quickly converted into electrical energy. Currently, the application proportion of hydrogen fuel in the power industry is less than 0.2% of the global electricity generation. Therefore, it is of great significance to design a nuclear-wind-hydrogen storage combined power generation system with hydrogen as the energy carrier. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above-mentioned disadvantages of the prior art, and provides a nuclear-wind-solar-hydrogen combined power generation system and its working method, which use hydrogen as the energy carrier for nuclear-wind-hydrogen storage combined power generation.

[0006] To achieve the above object, the present invention discloses a nuclear-wind-solar-hydrogen combined power generation system, which includes an electrical load, a pressurized water reactor power generation device, a photovoltaic power generation device, an electrolytic cell hydrogen production device, and a fuel cell-gas turbine power generation device. Among them, the photovoltaic power generation device is connected to the pressurized water reactor power generation device, the electrolytic cell hydrogen production device, and the fuel cell-gas turbine power generation device. The electrolytic cell hydrogen production device is connected to the fuel cell-gas turbine power generation device. The electrical load is connected to the pressurized water reactor power generation device, the photovoltaic power generation device, the electrolytic cell hydrogen production device, and the fuel cell-gas turbine power generation device.

[0007] Further, the photovoltaic power generation device includes a solar collector, an evaporator, a turbine, a photovoltaic generator, a regenerator, a working fluid pump, a condenser, #1 heat exchanger, #2 heat exchanger, and a domestic hot water load;

[0008] The solar collector is connected to the primary side of the evaporator. The secondary side outlet of the evaporator is connected to the secondary side inlet of the evaporator through the turbine, the primary side of the regenerator, the primary side of the condenser, the working fluid pump, and the secondary side of the regenerator. The turbine is connected to the drive shaft of the photovoltaic generator, and the output end of the photovoltaic generator is connected to the electrical load.

[0009] The domestic hot water load is connected to the electrolytic cell hydrogen production device III through the tube side of the #2 heat exchanger. The secondary side of the condenser is connected to the fuel cell-gas turbine power generation device through the shell side of the #2 heat exchanger. The pressurized water reactor power generation device is connected to the fuel cell-gas turbine power generation device through the shell side of the #1 heat exchanger. The tube side of the #1 heat exchanger is connected to the electrolytic cell hydrogen production device.

[0010] Further, the pressurized water reactor power generation device includes a reactor, a pressurizer, a steam generator, a main pump, a main steam control valve, a high-pressure cylinder, a moisture separator reheater, a high-pressure heater, a low-pressure cylinder inlet control valve, a low-pressure cylinder, a nuclear reactor generator, a condenser, a condensate pump, #1 low-pressure heater, #2 low-pressure heater, #3 low-pressure heater, #4 low-pressure heater, a deaerator, a feed water pump, #1 high-pressure heater, and #2 high-pressure heater;

[0011] The outlet of the reactor is connected to the inlet of the reactor through the pressurizer, the heat release side of the steam generator, and the main pump. The outlet of the heat absorption side of the steam generator is divided into two paths. One path is connected to the shell side of the high-pressure heater and the shell side of the #1 heat exchanger. The other path is connected to the inlet of the moisture separator reheater through the main steam control valve and the high-pressure cylinder. The steam outlet of the moisture separator reheater is connected to the inlet of the condenser through the low-pressure cylinder inlet control valve and the low-pressure cylinder in sequence. The water outlet of the moisture separator reheater is connected to the inlet of the deaerator.

[0012] The outlet of the condenser is successively connected to the inlet of the deaerator through a condensate pump, the tube side of the #1 low-pressure heater, the tube side of the #2 low-pressure heater, the tube side of the #3 low-pressure heater, and the tube side of the #4 low-pressure heater. The outlet of the deaerator is successively connected to the inlet of the heat absorption side of the steam generator through a feed water pump, the tube side of the #1 high-pressure heater, and the tube side of the #2 high-pressure heater.

[0013] The outlet of the low-pressure cylinder is connected to the shell side inlets of the #1 low-pressure heater, the #2 low-pressure heater, the #3 low-pressure heater, and the #4 low-pressure heater. The shell side outlet of the #4 low-pressure heater is connected to the shell side inlet of the #3 low-pressure heater. The shell side outlet of the #2 low-pressure heater is connected to the shell side inlet of the #1 low-pressure heater. The shell side outlet of the #1 low-pressure heater is connected to the inlet of the condenser.

[0014] The extraction ports of the high-pressure cylinder are respectively connected to the shell side inlets of the high-pressure heater, the shell side inlet of the #2 high-pressure heater, the shell side inlet of the #1 high-pressure heater, and the inlet of the deaerator. The shell side outlet of the high-pressure heater is connected to the shell side inlet of the #1 high-pressure heater. The shell side outlet of the #1 high-pressure heater is connected to the inlet of the condenser.

[0015] Furthermore, the electrolytic cell hydrogen production device includes a wind turbine, a wind turbine generator, a power grid, a transformer, an electrolytic cell, a hydrogen cooler, a hydrogen separator, a hydrogen transmission regulating valve, a hydrogen purification device, a hydrogen storage tank, and a water storage tank.

[0016] Among them, the output shaft of the wind turbine is connected to the drive shaft of the wind turbine generator. The output end of the wind turbine generator is connected to the power supply interface and the electrical load of the electrolytic cell. The power grid is connected to the power supply interface of the electrolytic cell through a transformer. The tube side outlet of the #1 heat exchanger is connected to the inlet of the electrolytic cell. The hydrogen outlet of the electrolytic cell is successively connected to the hydrogen storage tank through a hydrogen cooler, a hydrogen separator, a hydrogen transmission regulating valve, and a hydrogen purification device. The outlet of the hydrogen storage tank is connected to the fuel cell-gas turbine power generation device. The water outlet of the electrolytic cell is connected to the water storage tank.

[0017] Furthermore, the fuel cell-gas turbine power generation device includes a #1 compressor, a #2 compressor, a #3 compressor, a #4 compressor, a #1 preheater, a #2 preheater, a #3 preheater, a #4 preheater, a solid oxide fuel cell, a combustion chamber, a #1 turbine, a #2 turbine, and a fuel cell-gas turbine generator.

[0018] The outlet of the hydrogen storage tank is successively connected to the hydrogen inlet of the solid oxide fuel cell through the #1 compressor, the #2 compressor, the tube side of the #1 preheater and the tube side of the #2 preheater. The outlet of the #3 compressor is connected to the oxygen inlet of the solid oxide fuel cell through the #4 compressor, the #3 preheater and the #4 preheater. The output end of the solid oxide fuel cell is connected to the inlet of the combustion chamber. The outlet of the combustion chamber is connected to the #2 turbine through the #1 turbine. The shell side outlet of the #1 heat exchanger is connected to the shell side of the #3 preheater through the shell side of the #1 preheater. The outlet of the #2 turbine is connected to the shell side of the #2 heat exchanger through the shell side of the #4 preheater and the shell side of the #2 preheater.

[0019] Furthermore, the fuel cell - gas turbine generator, the #2 turbine, the #1 turbine, the #4 compressor, the #3 compressor, the #2 compressor and the #1 compressor are coaxially arranged.

[0020] Furthermore, the output end of the fuel cell - gas turbine generator is connected to the electrical load.

[0021] Furthermore, the electrolyzer is a solid oxide electrolyzer.

[0022] The present invention discloses a working method of a nuclear - wind - solar - hydrogen combined power generation system, including:

[0023] The reactor generates steam to drive the nuclear reactor generator to generate electricity at full load, and the photovoltaic generator and the wind turbine generator operate at variable loads;

[0024] When the electricity generated by the nuclear - wind - solar - hydrogen combined power generation system meets the electrical load demand, the excess electricity is supplied to the electrolyzer for hydrogen production, and the hydrogen is purified and compressed into the hydrogen storage tank;

[0025] When the electricity generated by the nuclear - wind - solar - hydrogen combined power generation system cannot meet the electrical load demand, the fuel cell - gas turbine generator is started to generate electricity. When the fuel cell - gas turbine generator cannot meet the load gap, electricity is purchased from the power grid;

[0026] Furthermore, the minimum operating power of the electrolyzer is 10% of the rated power;

[0027] When the hydrogen storage in the hydrogen storage tank is lower than 20% of the rated capacity, the fuel cell - gas turbine power generation device uses natural gas and air as fuels for power generation.

[0028] The present invention has the following beneficial effects:

[0029] When the nuclear-wind-solar-hydrogen combined power generation system and its working method described in the present invention are specifically operated, it includes an electrical load, a pressurized water reactor power generation device, a photovoltaic power generation device, an electrolytic cell hydrogen production device, and a fuel cell-gas turbine power generation device. Among them, the photovoltaic power generation device is connected to the pressurized water reactor power generation device, the electrolytic cell hydrogen production device, and the fuel cell-gas turbine power generation device. The electrolytic cell hydrogen production device is connected to the fuel cell-gas turbine power generation device. Hydrogen is provided by the electrolytic cell hydrogen production device, and combined power generation is achieved by using the fuel cell-gas turbine power generation device, the pressurized water reactor power generation device, the photovoltaic power generation device, and the electrolytic cell hydrogen production device, realizing the purpose of nuclear-wind energy hydrogen storage power generation co-production with hydrogen as the energy carrier, and it has extremely strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The specification drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0031] Figure 1 is the structural diagram of the present invention;

[0032] Figure 2 is the method flow chart of the present invention.

[0033] Among them, Ⅰ is the pressurized water reactor power generation device, Ⅱ is the photovoltaic power generation device, Ⅲ is the electrolytic cell hydrogen production device, IV is the fuel cell-gas turbine power generation device, 1 is the reactor, 2 is the pressurizer, 3 is the steam generator, 4 is the main pump, 5 is the main steam regulating valve, 6 is the high-pressure cylinder, 7 is the moisture separator reheater, 8 is the high-pressure heater, 9 is the low-pressure cylinder inlet regulating valve, 10 is the low-pressure cylinder, 11 is the nuclear reactor generator, 12 is the condenser, 13 is the condensate pump, 14 is the #1 low-pressure heater, 15 is the #2 low-pressure heater, 16 is the #3 low-pressure heater, 17 is the #4 low-pressure heater, 18 is the deaerator, 19 is the feed water pump, 20 is the #1 high-pressure heater, 21 is the #2 high-pressure heater, 22 is the solar collector, 23 is the evaporator, 24 is the turbine, 25 is the photovoltaic generator, 26 is the regenerator, 27 is the working fluid pump, 28 is the condenser, 29 is the #1 heat exchanger, 30 is the #2 heat exchanger, 31 is the domestic hot water load, 32 is the electrical load, 33 is the wind turbine, 34 is the wind turbine generator, 35 is the power grid, 36 is the transformer, 37 is the electrolytic cell, 38 is the hydrogen cooler, 39 is the hydrogen separator, 40 is the hydrogen transmission regulating valve, 41 is the hydrogen purification device, 42 is the hydrogen storage tank, 43 is the water storage tank, 44 is the #1 compressor, 45 is the #2 compressor, 46 is the #3 compressor, 47 is the #4 compressor, 48 is the #1 preheater, 49 is the #2 preheater, 50 is the #3 preheater, 51 is the #4 preheater, 52 is the solid oxide fuel cell, 53 is the combustion chamber, 54 is the #1 turbine, 55 is the #2 turbine, 56 is the fuel cell-gas turbine generator. Detailed implementation mode

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "include" and "comprise" indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations.

[0036] It should also be understood that the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0037] It should be further understood that the term "and / or" used in the specification of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the related listed items, and includes these combinations. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present invention generally represents an "or" relationship between the preceding and following related objects.

[0038] It should be understood that although the terms first, second, third, etc. may be used in the embodiments of the present invention to describe preset ranges, etc., these preset ranges should not be limited to these terms. These terms are only used to distinguish the preset ranges from each other. For example, without departing from the scope of the embodiments of the present invention, the first preset range can also be referred to as the second preset range, and similarly, the second preset range can also be referred to as the first preset range.

[0039] Depending on the context, the word "if" as used herein can be interpreted as "when" or "while" or "in response to determining" or "in response to detecting". Similarly, depending on the context, the phrase "if determined" or "if detecting (stated condition or event)" can be interpreted as "when determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)".

[0040] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the present invention described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0041] Various schematic structural diagrams according to the disclosed embodiments of the present invention are shown in the drawings. These figures are not drawn to scale, where for the purpose of clear expression, some details are enlarged and some details may be omitted. The shapes of various regions and layers shown in the figures and their relative sizes and positional relationships are merely exemplary. In practice, there may be deviations due to manufacturing tolerances or technical limitations, and those skilled in the art can design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0042] Referring to Figure 1 , the nuclear-wind-solar-hydrogen power generation co-production system of the present invention includes a pressurized water reactor power generation device I, a photovoltaic power generation device II, an electrolytic cell hydrogen production device III, and a fuel cell-gas turbine power generation device IV. Among them, the photovoltaic power generation device II is connected to the pressurized water reactor power generation device I, the electrolytic cell hydrogen production device III, and the fuel cell-gas turbine power generation device IV. The electrolytic cell hydrogen production device III is connected to the fuel cell-gas turbine power generation device IV. The electrical load 32 is connected to the pressurized water reactor power generation device I, the photovoltaic power generation device II, the electrolytic cell hydrogen production device III, and the fuel cell-gas turbine power generation device IV.

[0043] The photovoltaic power generation device II includes a solar collector 22, an evaporator 23, a turbine 24, a photovoltaic generator 25, a recuperator 26, a working fluid pump 27, a condenser 28, a #1 heat exchanger 29, a #2 heat exchanger 30, and a domestic hot water load 31. Among them, the solar collector 22 is connected to the primary side of the evaporator 23. The secondary side outlet of the evaporator 23 is connected to the secondary side inlet of the evaporator 23 through the turbine 24, the primary side of the recuperator 26, the primary side of the condenser 28, the working fluid pump 27, and the secondary side of the recuperator 26. The turbine 24 is connected to the drive shaft of the photovoltaic generator 25, and the output end of the photovoltaic generator 25 is connected to the electrical load 32. The domestic hot water load 31 is connected to the electrolytic cell hydrogen production device III through the tube side of the #2 heat exchanger 30. The secondary side of the condenser 28 is connected to the fuel cell-gas turbine power generation device IV through the shell side of the #2 heat exchanger 30. The pressurized water reactor power generation device I is connected to the fuel cell-gas turbine power generation device IV through the shell side of the #1 heat exchanger 29. The tube side of the #1 heat exchanger 29 is connected to the electrolytic cell hydrogen production device III.

[0044] The pressurized water reactor power generation device I includes a reactor 1, a pressurizer 2, a steam generator 3, a main pump 4, a main steam regulating valve 5, a high-pressure cylinder 6, a steam-water separation and reheater 7, a high-pressure heater 8, a low-pressure cylinder inlet regulating valve 9, a low-pressure cylinder 10, a nuclear reactor generator 11, a condenser 12, a condensate pump 13, a #1 low-pressure heater 14, a #2 low-pressure heater 15, a #3 low-pressure heater 16, a #4 low-pressure heater 17, a deaerator 18, a feed water pump 19, a #1 high-pressure heater 20, and a #2 high-pressure heater 21;

[0045] The outlet of the reactor 1 is connected to the inlet of the reactor 1 through the pressurizer 2, the heat release side of the steam generator 3, and the main pump 4. The outlet of the heat absorption side of the steam generator 3 is divided into two paths. One path is connected to the shell side of the high-pressure heater 8 and the shell side of the #1 heat exchanger 29, and the other path is connected to the inlet of the steam-water separation and reheater 7 through the main steam regulating valve 5 and the high-pressure cylinder 6. The steam outlet of the steam-water separation and reheater 7 is successively connected to the inlet of the condenser 12 through the low-pressure cylinder inlet regulating valve 9 and the low-pressure cylinder 10. The water outlet of the steam-water separation and reheater 7 is connected to the inlet of the deaerator 18.

[0046] The outlet of the condenser 12 is successively connected to the inlet of the deaerator 18 through the condensate pump 13, the tube side of the #1 low-pressure heater 14, the tube side of the #2 low-pressure heater 15, the tube side of the #3 low-pressure heater 16, and the tube side of the #4 low-pressure heater 17. The outlet of the deaerator 18 is successively connected to the inlet of the heat absorption side of the steam generator 3 through the feed water pump 19, the tube side of the #1 high-pressure heater 20, and the tube side of the #2 high-pressure heater 21.

[0047] The outlet of the low-pressure cylinder 10 is communicated with the shell-side inlets of the #1 low-pressure heater 14, the #2 low-pressure heater 15, the #3 low-pressure heater 16 and the #4 low-pressure heater 17. The shell-side outlet of the #4 low-pressure heater 17 is communicated with the shell-side inlet of the #3 low-pressure heater 16. The shell-side outlet of the #2 low-pressure heater 15 is communicated with the shell-side inlet of the #1 low-pressure heater 14. The shell-side outlet of the #1 low-pressure heater 14 is communicated with the inlet of the condenser 12.

[0048] The extraction ports of the high-pressure cylinder 6 are respectively communicated with the shell-side inlet of the high-pressure heater 8, the shell-side inlet of the #2 high-pressure heater 21, the shell-side inlet of the #1 high-pressure heater 20 and the inlet of the deaerator 18. The shell-side outlet of the high-pressure heater 8 is communicated with the shell-side inlet of the #1 high-pressure heater 20. The shell-side outlet of the #1 high-pressure heater 20 is communicated with the inlet of the condenser 12.

[0049] The electrolytic cell hydrogen production device III includes a wind turbine 33, a wind turbine generator 34, a power grid 35, a transformer 36, an electrolytic cell 37, a hydrogen cooler 38, a hydrogen separator 39, a hydrogen delivery regulating valve 40, a hydrogen purification device 41, a hydrogen storage tank 42 and a water storage tank 43;

[0050] Wherein, the output shaft of the wind turbine 33 is connected to the drive shaft of the wind turbine generator 34. The output end of the wind turbine generator 34 is connected to the power supply interface of the electrolytic cell 37 and the electrical load 32. The power grid 35 is connected to the power supply interface of the electrolytic cell 37 via the transformer 36. The tube-side outlet of the #1 heat exchanger 29 is communicated with the inlet of the electrolytic cell 37. The hydrogen outlet of the electrolytic cell 37 is successively communicated with the hydrogen storage tank 42 via the hydrogen cooler 38, the hydrogen separator 39, the hydrogen delivery regulating valve 40 and the hydrogen purification device 41. The outlet of the hydrogen storage tank 42 is connected to the fuel cell-gas turbine power generation device IV. The water outlet of the electrolytic cell 37 is connected to the water storage tank 43.

[0051] The fuel cell-gas turbine power generation device IV includes a #1 compressor 44, a #2 compressor 45, a #3 compressor 46, a #4 compressor 47, a #1 preheater 48, a #2 preheater 49, a #3 preheater 50, a #4 preheater 51, a solid oxide fuel cell 52, a combustion chamber 53, a #1 turbine 54, a #2 turbine 55, and a fuel cell-gas turbine generator 56. Among them, the outlet of the hydrogen storage tank 42 is successively connected to the hydrogen inlet of the solid oxide fuel cell 52 through the #1 compressor 44, the #2 compressor 45, the tube side of the #1 preheater 48, and the tube side of the #2 preheater 49. The outlet of the #3 compressor 46 is connected to the oxygen inlet of the solid oxide fuel cell 52 through the #4 compressor 47, the #3 preheater 50, and the #4 preheater 51. The output end of the solid oxide fuel cell 52 is connected to the inlet of the combustion chamber 53. The outlet of the combustion chamber 53 is connected to the #2 turbine 55 through the #1 turbine 54. The shell side outlet of the #1 heat exchanger 29 is connected to the shell side of the #3 preheater 50 through the shell side of the #1 preheater 48. The outlet of the #2 turbine 55 is connected to the shell side of the #2 heat exchanger 30 through the shell side of the #4 preheater 51 and the shell side of the #2 preheater 49.

[0052] The fuel cell-gas turbine generator 56, the #2 turbine 55, the #1 turbine 54, the #4 compressor 47, the #3 compressor 46, the #2 compressor 45, and the #1 compressor 44 are coaxially arranged. The output end of the fuel cell-gas turbine generator 56 is connected to the electrical load 32.

[0053] Reference Figure 2 , the working method of the nuclear-wind-solar-hydrogen combined power generation system described in the present invention includes the following steps:

[0054] 1) The reactor 1 generates steam to drive the nuclear reactor generator 11 to generate electricity at full load, and the photovoltaic generator 25 and the wind turbine generator 34 operate at variable loads;

[0055] 2) When the electricity generated by the nuclear-wind-solar-hydrogen combined power generation system meets the demand of the electrical load 32, the surplus electricity is supplied to the electrolyzer 37 to produce hydrogen, and the hydrogen is purified and compressed into the hydrogen storage tank 42;

[0056] 3) When the electricity generated by the nuclear-wind-solar-hydrogen combined power generation system cannot meet the demand of the electrical load 32, the fuel cell-gas turbine generator 56 is started to generate electricity. When the fuel cell-gas turbine generator 56 cannot meet the load gap, electricity is purchased from the power grid 35;

[0057] In addition, it is evaluated whether the electrolyzer 37 is in a safe and continuous operation state. When it is evaluated that the electrolyzer 37 is not in a safe and continuous operation state, based on the allowable start-stop times and the minimum operating power, the power of the fuel cell-gas turbine generator 56 is preferentially increased to produce hydrogen, and then electricity is purchased from the grid to produce hydrogen;

[0058] In this embodiment, the electrolyzer 37 is a solid oxide electrolyzer. The judgment criteria for operation continuity and safety are that the operating power of the electrolyzer 37 is higher than the minimum standard, and the start-stop times meet the planned values.

[0059] In this embodiment, the minimum operating power of the electrolyzer 37 is 10% of the rated power, and the planned annual start-stop times are 2.

[0060] In this embodiment, when the hydrogen storage capacity of the hydrogen storage tank 42 is lower than 20% of the rated capacity, the fuel cell-gas turbine power generation device IV uses natural gas and air as fuels for power generation.

[0061] The present invention couples a pressurized water reactor with wind power, photovoltaic power, and hydrogen energy, further improving the reliability, flexibility, and economy of the power supply system. At the same time, the system fully considers the waste heat at all levels and demand matching, uses the heat of the pressurized water reactor to supply the electrolyzer 37 and the fuel cell, cascades the waste heat of the gas turbine turbine, and increases the domestic hot water temperature of the solar collector 22. By the present invention, several subsystems are coupled into a combined system, realizing the efficient utilization of renewable energy and nuclear energy, and also achieving the dual goals of safety and low carbon, helping to build a new power system for a low-carbon economy.

[0062] After considering the specification and the disclosure of the invention, those skilled in the art will readily think of other embodiments of the present invention. This application aims to cover any variations, uses, or adaptations of the present invention, which follow the general principles of the present invention and include the common general knowledge or conventional technical means in the technical field not disclosed by the present invention. The specification and the embodiments are only regarded as exemplary, and the true scope and spirit of the present invention are pointed out by the following claims.

[0063] It should be understood that the present invention is not limited to the exact structure already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

[0064] The above are only the preferred embodiments of the present invention, and do not impose any limitation on the present invention. Any simple modifications, changes, and equivalent structural changes made to the above embodiments according to the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A nuclear wind solar hydrogen power generation system, characterized in that: The invention comprises an electric load (32), a pressurized water reactor power generation device (I), a photovoltaic power generation device (II), an electrolyzer hydrogen production device (III) and a fuel cell-gas turbine power generation device (IV), wherein the photovoltaic power generation device (II) is connected to the pressurized water reactor power generation device (I), the electrolyzer hydrogen production device (III) and the fuel cell-gas turbine power generation device (IV), the electrolyzer hydrogen production device (III) is connected to the fuel cell-gas turbine power generation device (IV), and the electric load (32) is connected to the pressurized water reactor power generation device (I), the photovoltaic power generation device (II), the electrolyzer hydrogen production device (III) and the fuel cell-gas turbine power generation device (IV).

2. The nuclear-wind-solar-hydrogen power generation system according to claim 1 is characterized in that: The photovoltaic power generation device II comprises a solar collector (22), an evaporator (23), a turbine (24), a photovoltaic generator (25), a heat regenerator (26), a working fluid pump (27), a condenser (28), a #1 heat exchanger (29), a #2 heat exchanger (30) and a domestic hot water load (31); The solar collector (22) is connected to the primary side of the evaporator (23); the secondary side outlet of the evaporator (23) is connected to the secondary side inlet of the evaporator (23) via the turbine (24), the primary side of the regenerator (26), the primary side of the condenser (28), the working fluid pump (27), and the secondary side of the regenerator (26); the turbine (24) is connected to the driving shaft of the photovoltaic generator (25), and the output end of the photovoltaic generator (25) is connected to the electric load (32); The domestic hot water load (31) is connected to the electrolyzer hydrogen production device (III) via the tube side of the #2 heat exchanger (30), the secondary side of the condenser (28) is connected to the fuel cell-gas turbine power generation device (IV) via the shell side of the #2 heat exchanger (30), the pressurized water reactor power generation device (I) is connected to the fuel cell-gas turbine power generation device (IV) via the shell side of the #1 heat exchanger (29), and the tube side of the #1 heat exchanger (29) is connected to the electrolyzer hydrogen production device (III).

3. The nuclear-wind-solar-hydrogen power generation system according to claim 2 is characterized in that: The pressurized water reactor power generation device (I) comprises a reactor (1), a pressurizer (2), a steam generator (3), a main pump (4), a main steam regulating valve (5), a high-pressure cylinder (6), a steam-water separation reheater (7), a high-pressure heater (8), a low-pressure cylinder inlet regulating valve (9), a low-pressure cylinder (10), a nuclear reactor generator (11), a condenser (12), a condensate pump (13), a #1 low-pressure heater (14), a #2 low-pressure heater (15), a #3 low-pressure heater (16), a #4 low-pressure heater (17), a deaerator (18), a feedwater pump (19), a #1 high-pressure heater (20) and a #2 high-pressure heater (21); The outlet of the reactor (1) is connected to the inlet of the reactor (1) via the stabilizer (2), the heat release side of the steam generator (3) and the main pump (4); the outlet of the heat absorption side of the steam generator (3) is divided into two paths, one of which is connected to the shell side of the high-pressure heater (8) and the shell side of the #1 heat exchanger (29); the other is connected to the inlet of the steam-water separation reheater (7) via the main steam regulating valve (5) and the high-pressure cylinder (6); the steam outlet of the steam-water separation reheater (7) is connected to the inlet of the condenser (12) via the low-pressure cylinder inlet regulating valve (9) and the low-pressure cylinder (10) in turn; and the water outlet of the steam-water separation reheater (7) is connected to the inlet of the deaerator (18); The outlet of the condenser (12) is connected to the inlet of the deaerator (18) via the condensate pump (13), the tube side of the #1 low-pressure heater (14), the tube side of the #2 low-pressure heater (15), the tube side of the #3 low-pressure heater (16) and the tube side of the #4 low-pressure heater (17) in sequence, and the outlet of the deaerator (18) is connected to the heat absorption side inlet of the steam generator (3) via the feed water pump (19), the tube side of the #1 high-pressure heater (20) and the tube side of the #2 high-pressure heater (21) in sequence; The outlet of the low-pressure cylinder (10) is connected to the shell side inlet of the #1 low-pressure heater (14), the shell side inlet of the #2 low-pressure heater (15), the shell side inlet of the #3 low-pressure heater (16) and the shell side inlet of the #4 low-pressure heater (17); the shell side outlet of the #4 low-pressure heater (17) is connected to the shell side inlet of the #3 low-pressure heater (16); the shell side outlet of the #2 low-pressure heater (15) is connected to the shell side inlet of the #1 low-pressure heater (14); and the shell side outlet of the #1 low-pressure heater (14) is connected to the inlet of the condenser (12); The steam extraction port of the high-pressure cylinder (6) is respectively connected to the shell side inlet of the high-pressure heater (8), the shell side inlet of the #2 high-pressure heater (21), the shell side inlet of the #1 high-pressure heater (20) and the inlet of the deaerator (18); the shell side outlet of the high-pressure heater (8) is connected to the shell side inlet of the #1 high-pressure heater (20); and the shell side outlet of the #1 high-pressure heater (20) is connected to the inlet of the condenser (12).

4. The nuclear-wind-solar-hydrogen power generation system according to claim 3 is characterized in that: The electrolyzer hydrogen production device (III) comprises a wind turbine (33), a wind turbine generator (34), a power grid (35), a transformer (36), an electrolyzer (37), a hydrogen cooler (38), a hydrogen separator (39), a hydrogen transfer regulating valve (40), a hydrogen purification device (41), a hydrogen storage tank (42) and a water storage tank (43); The output shaft of the wind turbine (33) is connected to the driving shaft of the wind turbine generator (34), the output end of the wind turbine generator (34) is connected to the power interface of the electrolyzer (37) and the electric load (32), the power grid (35) is connected to the power interface of the electrolyzer (37) via the transformer (36), the pipe side outlet of the #1 heat exchanger (29) is connected to the inlet of the electrolyzer (37), the hydrogen outlet of the electrolyzer (37) is connected to the hydrogen storage tank (42) via the hydrogen cooler (38), the hydrogen separator (39), the hydrogen transfer regulating valve (40), the hydrogen purification device (41), the outlet of the hydrogen storage tank (42) is connected to the fuel cell-gas turbine power generation device (IV), and the water outlet of the electrolyzer (37) is connected to the water storage tank (43).

5. The nuclear-wind-solar-hydrogen power generation system according to claim 4 is characterized in that: The fuel cell-gas turbine power generation device (IV) includes a #1 compressor (44), a #2 compressor (45), a #3 compressor (46), a #4 compressor (47), a #1 preheater (48), a #2 preheater (49), a #3 preheater (50), a #4 preheater (51), a solid oxide fuel cell (52), a combustion chamber (53), a #1 turbine (54), a #2 turbine (55) and a fuel cell-gas turbine generator (56); The outlet of the hydrogen storage tank (42) is connected to the hydrogen inlet of the solid oxide fuel cell (52) via the #1 compressor (44), the #2 compressor (45), the tube side of the #1 preheater (48) and the tube side of the #2 preheater (49) in sequence, and the outlet of the #3 compressor (46) is connected to the oxygen inlet of the solid oxide fuel cell (52) via the #4 compressor (47), the #3 preheater (50) and the #4 preheater (51). The output end of the pool (52) is connected to the inlet of the combustion chamber (53), the outlet of the combustion chamber (53) is connected to the #2 turbine (55) via the #1 turbine (54), the shell side outlet of the #1 heat exchanger (29) is connected to the shell side of the #3 preheater (50) via the shell side of the #1 preheater (48), and the outlet of the #2 turbine (55) is connected to the shell side of the #2 heat exchanger (30) via the shell side of the #4 preheater (51) and the shell side of the #2 preheater (49).

6. The nuclear-wind-solar-hydrogen power generation system according to claim 5 is characterized in that: The fuel cell-gas turbine generator (56), the #2 turbine (55), the #1 turbine (54), the #4 compressor (47), the #3 compressor (46), the #2 compressor (45) and the #1 compressor (44) are coaxially arranged.

7. The nuclear-wind-solar-hydrogen power generation system according to claim 5 is characterized in that: The output end of the fuel cell-gas turbine generator (56) is connected to the electrical load (32).

8. The nuclear-wind-solar-hydrogen power generation system according to claim 4 is characterized in that: The electrolytic cell (37) is a solid oxide electrolytic cell.

9. A working method of the nuclear-wind-solar-hydrogen power generation system according to any one of claims 1 to 8, characterized in that: include: The reactor (1) generates steam to drive the nuclear reactor generator (11) to generate electricity at full load, and the photovoltaic generator (25) and the wind turbine generator (34) operate at variable load; When the electricity generated by the nuclear-wind-solar-hydrogen power generation system meets the demand of the electric load (32), the excess electricity is supplied to the electrolyzer (37) to produce hydrogen, and the hydrogen is purified and compressed into the hydrogen storage tank (42); When the electricity generated by the nuclear, wind, solar and hydrogen power generation system cannot meet the demand of the electric load (32), the fuel cell-gas turbine generator (56) is started to generate electricity. When the fuel cell-gas turbine generator (56) cannot meet the load gap, electricity is purchased from the power grid (35).

10. The working method of the nuclear-wind-solar-hydrogen power generation system according to claim 9 is characterized in that: The minimum operating power of the electrolytic cell (37) is 10% of the rated power; When the hydrogen storage capacity of the hydrogen storage tank (42) is less than 20% of the rated capacity, the fuel cell-gas turbine power generation device (IV) uses natural gas and air as fuel to generate electricity.

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