Wind power and photovoltaic-hydrogen supply system

Abstract

The invention relates to a wind power and photovoltaic-hydrogen supply system which comprises a power generation unit used for converting wind energy and solar energy into electric power; the energy storage unit is used for storing the electric power prepared by the power generation unit; and the hydrogen supply unit is used for receiving the electric power from the power generation unit and the energy storage unit and converting the received electric power into hydrogen energy. The device has the advantages that zero emission is achieved in the hydrogen production and storage process, meanwhile, the utilization efficiency of wind power and photovoltaics in remote areas is improved, redundant abandoned electricity which cannot be consumed by a power grid is converted into hydrogen energy, liquid hydrogen can be conveniently transported to a power generation center for power generation, the requirements for energy conservation and environmental protection are met, and carbon neutralization is facilitated.

Description

Technical Field

[0001] The invention relates to the field of new energy technology, in particular to a wind power and photovoltaic-hydrogen supply system. Background Art

[0002] Wind power generation is the use of wind to drive the windmill blades to rotate, and the speed increaser is used to increase the rotation speed to drive the generator to generate electricity; solar photovoltaic power generation is a technology that uses solar cells to directly convert sunlight into electrical energy. It is an important direction for the development of green energy. Solar photovoltaic power generation has the advantages of being green, environmentally friendly, low-cost, and renewable. It will occupy a major position in energy supply in the future. Wind power generation and photovoltaic power generation do not produce any pollutants, are environmentally friendly, and help reduce greenhouse gas emissions.

[0003] As the dual carbon targets are approaching, carbon emissions in the transportation sector are receiving more and more attention, and it is imperative to reduce carbon emissions in the transportation sector. In order to solve the environmental and energy problems brought about by traditional fuel vehicles and fossil energy, the development of hydrogen vehicles and the use of hydrogen energy have received strong support from the country.

[0004] Hydrogen vehicles produce mainly water vapor during operation, with almost no pollutant emissions, so they are considered a zero-emission means of transportation. Hydrogen, as a fuel for hydrogen vehicles, is an efficient energy medium with the advantages of abundant resources and renewable nature. However, as a major producer and consumer of hydrogen, my country's main source of hydrogen is fossil fuels and byproduct hydrogen, which will generate additional carbon emissions during the manufacturing and transportation process. Summary of the invention

[0005] In view of the technical problems existing in the prior art, the present invention provides a wind power and photovoltaic-hydrogen supply system, which fully utilizes renewable resources to supply hydrogen and reduces carbon emissions at the same time.

[0006] The technical solution of the present invention to solve the above technical problems is as follows: A wind power, photovoltaic-hydrogen supply system comprises: a power generation unit for converting wind energy and solar energy into electricity; An energy storage unit, used to store the electricity generated by the power generation unit; The hydrogen supply unit is used to receive electricity from the power generation unit and the energy storage unit, and convert the received electricity into hydrogen energy.

[0007] As a further technical solution, the power generation unit includes a wind power generation device, a photovoltaic power generation device, and a power distribution device. The power output end of the wind power generation device and the power output end of the photovoltaic power generation device are both connected to the power input end of the power distribution device, and the two power output ends of the power distribution device are respectively connected to the energy storage unit and the hydrogen supply unit.

[0008] As a further technical solution, the power generation unit further includes a combiner box, and the power generated by the wind power generation device and the photovoltaic power generation device is collected in the combiner box and then transmitted to the power distribution device.

[0009] As a further technical solution, the energy storage unit includes an energy storage system and a control system connected to an output end of the energy storage system, and the output end of the control system transmits the electricity stored in the energy storage system to the hydrogen supply unit to be converted into hydrogen energy; The energy storage system is dynamically coupled to the power distribution device.

[0010] As a further technical solution, the energy storage system is composed of a plurality of energy storage modules to dynamically adjust the energy storage capacity of the energy storage system and achieve dynamic response through the control system.

[0011] As a further technical solution, the hydrogen supply unit includes a hydrogen production device, a hydrogen buffer tank, a hydrogen liquefaction system, and a liquid hydrogen storage system connected in sequence. The two power input ends of the hydrogen production device are respectively connected to the power output end of the power distribution device and the power output end of the control system.

[0012] As a further technical solution, the working pressure level of the hydrogen buffer tank is 1.6 Mpa, and the hydrogen liquefaction system liquefies 5 tons of hydrogen per day.

[0013] As a further technical solution, the energy storage system is a battery energy storage system or a vanadium liquid flow battery energy storage system.

[0014] As a further technical solution, the hydrogen production device, the hydrogen buffer tank, the hydrogen liquefaction system, and the liquid hydrogen storage system are located in the same station.

[0015] The beneficial effects of the present invention are: making the hydrogen production and storage process zero-emission, while improving the utilization efficiency of wind power and photovoltaics in remote areas, converting excess abandoned electricity that cannot be absorbed by the power grid into hydrogen energy, facilitating the transportation of liquid hydrogen to power generation centers for power generation, meeting energy-saving and environmental protection requirements, and helping to achieve carbon neutrality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structural connection of a wind power and photovoltaic-hydrogen supply system of the present invention.

[0017] In the accompanying drawings, the components represented by the reference numerals are listed as follows: Power generation unit 1, wind power generation device 11, photovoltaic power generation device 12, power distribution device 13, combiner box 14; Energy storage unit 2, energy storage system 21, control system 22; Hydrogen supply unit 3, hydrogen production device 31, hydrogen buffer tank 32, hydrogen liquefaction system 33, liquid hydrogen storage system 34. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0019] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0020] In the description of the present application, the term "for example" is used to mean "used as an example, illustration or description". Any embodiment described as "for example" in the present application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is given to enable any technician in the field to implement and use the present invention. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present invention can be implemented without using these specific details. In other examples, well-known structures and processes will not be elaborated in detail to avoid unnecessary details to obscure the description of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in the present application.

[0021] Example 1 In order to achieve zero emission in the process of manufacturing hydrogen energy and transporting hydrogen, this embodiment provides a wind power and photovoltaic-hydrogen supply system. The system produces hydrogen through green energy and is particularly suitable for remote areas with abundant wind and solar resources to establish a comprehensive hydrogen storage and energy storage station to meet the requirements of energy conservation and environmental protection. Figure 1 , including: A power generation unit 1, used for converting wind energy and solar energy into electricity; An energy storage unit 2, used to store the electricity generated by the power generation unit 1; The hydrogen supply unit 3 is used to receive electricity from the power generation unit 1 and the energy storage unit 2, and convert the received electricity into hydrogen energy.

[0022] In this system, the power generation unit 1 first distributes electricity to the hydrogen supply unit 3 to prepare hydrogen energy, and when there is excess electricity, the excess electricity is distributed to the energy storage unit 2 for storage. When the hydrogen supply unit 3 receives insufficient electricity from the power generation unit 1, the energy storage unit 2 transmits the stored electricity to the hydrogen supply unit 3. At this time, the power generation unit 1 only supplies electricity to the hydrogen supply unit 3. That is, using wind energy and solar energy as the power source, no carbon emissions will be generated in the process of hydrogen supply (such as hydrogen production and storage), which is low-carbon and environmentally friendly.

[0023] For example, the hydrogen produced by the hydrogen supply unit 3 can be stored or transported to a hydrogen refueling station or a hydrogen-fired power generation center.

[0024] In the specific implementation process, the power generation unit 1 includes a wind power generation device 11, a photovoltaic power generation device 12, and a power distribution device 13. The power output end of the wind power generation device 11 and the power output end of the photovoltaic power generation device 12 are both connected to the power input end of the power distribution device 13, and the two power output ends of the power distribution device 13 are respectively connected to the energy storage unit 2 and the hydrogen supply unit 3.

[0025] For example, the wind power generation device 11 is a device that converts wind power into electricity, and mainly includes a wind rotor, a nacelle, and a tower. When wind blows toward the wind rotor, the blades rotate due to the action of wind energy. The rotation of the wind rotor is transmitted to the speed-increasing gearbox through the low-speed shaft. After speed increase, the generator is driven to rotate through the high-speed shaft, and the generator converts mechanical energy into electrical energy.

[0026] The device for converting solar energy into electricity on the photovoltaic power generation device 12 mainly includes a solar panel, an inverter, a bracket system, and an electrical connection to a monitoring system. When the cells in the solar panel are exposed to sunlight, photons interact with electrons in the semiconductor material to produce a photovoltaic effect, causing electrons to form a potential difference inside the cell, thereby generating direct current. The direct current is transmitted to the inverter through a cable, and the inverter converts the direct current into alternating current that meets the requirements, and then transmits the electric energy to the power grid or local load through an electrical connection (such as transmitting the electric energy to the power distribution device 13 in this application and then entering the energy storage unit 2 and the hydrogen supply unit 3). In this process, the bracket system ensures that the solar panel can effectively receive sunlight, and the monitoring system monitors and controls the operating status of the entire device.

[0027] The power of the power distribution device 13 is transmitted to the energy storage unit 2 through the transformer module.

[0028] In detail, the power generation unit 1 also includes a junction box 14. The power generated by the wind power generation device 11 and the photovoltaic power generation device 12 is collected in the junction box 14 and then transmitted to the power distribution device 13, that is, the direct current is collected together to reduce the number of subsequent connection lines. The power distribution device 13 reasonably distributes the power generated by the wind power generation device 11 and the photovoltaic power generation device 12 and outputs it to the hydrogen supply unit 3.

[0029] In the specific implementation process, the energy storage unit 2 includes an energy storage system 21 and a control system 22 connected to the output end of the energy storage system 21. The output end of the control system 22 transmits the electricity stored in the energy storage system 21 to the hydrogen supply unit 3 for conversion into hydrogen energy; the energy storage system 21 is dynamically coupled with the power distribution device 13, and can simultaneously provide power to the hydrogen supply unit 3 and maintain its operation.

[0030] For example, the energy storage system 21 is a battery energy storage system or a vanadium liquid flow battery energy storage system 21, which is a high-power, long-term energy storage system 21, has no impact on the power grid, and the stored electricity and released power are sufficient to maintain the long-term operation of the hydrogen supply unit 3. Furthermore, the energy storage system 21 is composed of a plurality of energy storage modules, and the energy storage capacity of the energy storage system 21 is dynamically adjusted by increasing or decreasing a single module, and a dynamic response is achieved through the control system 22. When the energy is fully stored, the hydrogen production device 31 can be maintained to operate for a long time when the wind power generation device 11 and the photovoltaic power generation device 12 are not working.

[0031] The control system 22 is used to control the power distribution of the energy storage system 21. For example, when the power distributed by the power distribution device 13 to the hydrogen supply unit 3 is insufficient to support the use of the hydrogen supply unit 3, the control system 22 transmits the power stored in the energy storage system 21 to the hydrogen supply unit 3 for use. It can be seen that the power distribution device 13 gives priority to meeting the power demand of the hydrogen supply unit 3, and when there is excess power, it is stored in the energy storage unit 2.

[0032] In the specific implementation process, the hydrogen supply unit 3 includes a hydrogen production device 31, a hydrogen buffer tank 32, a hydrogen liquefaction system 33, and a liquid hydrogen storage system 34 which are connected in sequence. The two power input ends of the hydrogen production device 31 are respectively connected to the power output end of the power distribution device 13 and the power output end of the control system 22. The hydrogen production device 31, the hydrogen buffer tank 32, the hydrogen liquefaction system 33, and the liquid hydrogen storage system 34 are located in the same station to save land costs.

[0033] It can be seen that the hydrogen supply unit 3 can be provided for energy vehicles, and can also be used for power generation through combustion. Hydrogen combustion power generation does not produce any pollutants and is environmentally friendly. At the same time, the combustion value of hydrogen is high, about three times that of gasoline of the same weight. That is, the hydrogen supply unit 3 integrates hydrogen production and hydrogen storage.

[0034] The hydrogen production device 31 has a certain ability to resist fluctuation interference. For example, the hydrogen production device 31 can be a water electrolysis hydrogen production device 31. The principle is: it is based on the electrochemical principle, and under the action of direct current, water is decomposed into hydrogen and oxygen; its main structural components include: electrolytic cell, power supply system, gas separation and purification system, circulation system, etc.

[0035] For example, the hydrogen buffer tank 32 is used to store the hydrogen produced by the hydrogen production device 31, and has the function of buffering and stabilizing the hydrogen pressure and flow rate. The working pressure level of the hydrogen buffer tank 32 is 1.6 Mpa; the hydrogen liquefaction system 33 is a device for converting gaseous hydrogen into liquid hydrogen, and its liquefied hydrogen capacity is 5 tons / day.

[0036] The structure of the liquid hydrogen storage system 34 mainly includes a storage container (such as a large liquid hydrogen spherical tank), a safety device, and ancillary equipment (such as a booster system and a filling system). The liquid hydrogen is stored in the inner tank in a liquid state at an extremely low temperature. The insulation layer prevents the external heat from entering and keeps the liquid hydrogen at a low temperature as much as possible. When liquid hydrogen is needed, the booster system is used to make the liquid hydrogen reach a suitable pressure and then transport it out through the filling system; the safety device always monitors the pressure and liquid level in the container. Once an abnormal situation occurs (such as excessive pressure or abnormal liquid level), the corresponding safety measures are immediately taken, such as opening a safety valve or sounding an alarm.

[0037] It should be noted that during the operation of the present invention: when the electric power generated by the wind power generation device 11 and the photovoltaic power generation device 12 is greater than the requirements of the hydrogen production device 31 and the liquid hydrogen storage system 34, the electric power generated by the energy storage system 21 is simultaneously supplied to the hydrogen production device 31; when the electric power generated by the wind power generation device 11 and the photovoltaic power generation device 12 does not meet the requirements of the hydrogen production device 31, the wind power generation device 11, the photovoltaic power generation device 12 and the energy storage unit 2 simultaneously supply power to the hydrogen production device 31; when the wind power generation device 11 and the photovoltaic power generation device 12 are not working, the energy storage system 21 provides power to the hydrogen production device 31.

[0038] That is, the energy storage system 21 can store electricity during the peak power generation period of the wind power generation device 11 and the photovoltaic power generation device 12, and can also provide the stored electricity to the hydrogen production device 31 through the control system 22 when the wind power generation device 11 and the photovoltaic power generation device 12 are in the low power generation period.

[0039] The present invention makes full use of renewable energy, and can realize low-cost green hydrogen production and energy storage in areas with sufficient wind and sunlight. The "abandoned electricity" generated by wind power generation and photovoltaic power generation in remote areas that cannot be connected to the grid can be converted into green hydrogen that is convenient for transportation and storage. The production and use of green hydrogen can reduce carbon emissions. The use of the energy storage system can effectively store excess electricity and provide electricity to the hydrogen production device when wind and sunlight are insufficient. It can be promoted and used in northwest windy areas with sufficient sunlight.

[0040] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and for parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0041] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0042] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A wind power and photovoltaic-hydrogen supply system, characterized in that: include A power generation unit (1) for converting wind energy and solar energy into electricity; An energy storage unit (2) for storing the electricity generated by the power generation unit (1); The hydrogen supply unit (3) is used to receive electricity from the power generation unit (1) and the energy storage unit (2), and convert the received electricity into hydrogen energy.

2. A wind power, photovoltaic-hydrogen supply system according to claim 1, characterized in that: The power generation unit (1) comprises a wind power generation device (11), a photovoltaic power generation device (12), and a power distribution device (13); the power output end of the wind power generation device (11) and the power output end of the photovoltaic power generation device (12) are both connected to the power input end of the power distribution device (13); and the two power output ends of the power distribution device (13) are respectively connected to the energy storage unit (2) and the hydrogen supply unit (3).

3. A wind power, photovoltaic-hydrogen supply system according to claim 2, characterized in that: The power generation unit (1) further comprises a combiner box (14), and the power generated by the wind power generation device (11) and the photovoltaic power generation device (12) is collected in the combiner box (14) and then transmitted to the power distribution device (13).

4. A wind power, photovoltaic-hydrogen supply system according to claim 2, characterized in that: The energy storage unit (2) comprises an energy storage system (21), and a control system (22) connected to an output end of the energy storage system (21), wherein the output end of the control system (22) transmits the electricity stored in the energy storage system (21) to the hydrogen supply unit (3) for conversion into hydrogen energy; The energy storage system (21) is dynamically coupled to the power distribution device (13).

5. A wind power, photovoltaic-hydrogen supply system according to claim 4, characterized in that: The energy storage system (21) is composed of a plurality of energy storage modules, so as to dynamically adjust the energy storage capacity of the energy storage system (21) and realize dynamic response through the control system (22).

6. A wind power, photovoltaic-hydrogen supply system according to claim 4, characterized in that: The hydrogen supply unit (3) comprises a hydrogen production device (31), a hydrogen buffer tank (32), a hydrogen liquefaction system (33), and a liquid hydrogen storage system (34) which are connected in sequence, and two power input ends of the hydrogen production device (31) are respectively connected to the power output end of the power distribution device (13) and the power output end of the control system (22).

7. A wind power, photovoltaic-hydrogen supply system according to claim 6, characterized in that: The working pressure level of the hydrogen buffer tank (32) is 1.6 Mpa, and the hydrogen liquefaction system (33) liquefies hydrogen in an amount of 5 tons per day.

8. A wind power, photovoltaic-hydrogen supply system according to claim 4, characterized in that: The energy storage system (21) is a battery energy storage system or a vanadium liquid flow battery energy storage system (21).

9. A wind power, photovoltaic-hydrogen supply system according to claim 6, characterized in that: The hydrogen production device (31), the hydrogen buffer tank (32), the hydrogen liquefaction system (33), and the liquid hydrogen storage system (34) are located in the same station.

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