Wind-electricity hybrid driven water pumping and compressed air hybrid energy storage system and method

Abstract

The invention relates to a wind-electricity hybrid driven water pumping and compressed air hybrid energy storage system and method, and belongs to the technical field of energy storage. Comprising a wind wheel, a water pump, a water-gas co-containing tank, a water turbine, a generator, a water pool, a compressor and a first motor, the water pump, the water-gas co-containing tank, the water turbine and the water pool are sequentially and circularly connected to form a water path system, the water-gas co-containing tank is connected with the compressor to form a gas path system, and the output ends of the wind wheel and the first motor are connected with the input end of the water pump to form a driving system; the output end of the water turbine is connected with the input end of the generator to form an energy release system. The system can be driven by wind energy and residual electric energy of a power grid, and energy sources are flexible; an artificial container can be used for storing energy, site selection is flexible, the structure is ingenious, and operation and maintenance are convenient.

Description

Technical Field

[0001] The invention relates to a wind-electric hybrid-driven water-pumping compressed air hybrid energy storage system and method, belonging to the technical field of energy storage. Background Art

[0002] As two major renewable energy sources, wind and solar power have shown great potential in reducing greenhouse gas emissions and mitigating climate change. However, the power generation characteristics of these energy sources are obviously unstable and intermittent, which makes them face challenges in meeting electricity demand. Therefore, energy storage technology has emerged as an important means to solve this problem.

[0003] At present, various energy storage technologies such as physical energy storage, electrochemical energy storage and electromagnetic energy storage have gradually matured and have been widely used. These technologies can not only balance the difference between power generation and power consumption, but also enhance the flexibility of the power grid and improve the system's ability to respond to emergencies. In terms of physical energy storage, pumped storage technology and compressed air energy storage technology have large-scale and long-term energy storage potential and have been vigorously developed. However, the site selection of pumped storage is relatively demanding, and the round-trip efficiency of compressed air energy storage technology is low. Therefore, researchers combined pumped storage and compressed air energy storage technologies and proposed a pumped water compressed air hybrid energy storage technology. For example, the publication number is CN117989097A, and the name of the invention is a pumped storage coupled compressed air energy storage system and method for a wind turbine tower. Its technical solution proposes a pumped compressed air hybrid energy storage system used in an abandoned wind tower, and the application scenario is relatively limited. The publication number is CN119103082A, and the name of the invention is Compressed Air Pumped Energy Storage System. Its technical solution proposes a pumped compressed air energy storage system with a three-stage compressor, a two-stage expander, a heat exchanger, a water pump, a turbine and other equipment, which is relatively complex.

[0004] Therefore, there is an urgent need to propose a wind-electric hybrid driven water-pumped compressed air hybrid energy storage system and method to solve the above technical problems. Summary of the invention

[0005] In order to solve the above problems, a wind-electric hybrid drive water-compressed air hybrid energy storage system and method are provided. A brief overview of the invention is given below to provide a basic understanding of certain aspects of the invention. It should be understood that this overview is not an exhaustive overview of the invention. It is not intended to determine the key or important parts of the invention, nor is it intended to limit the scope of the invention.

[0006] The technical solution of the present invention:

[0007] A wind-electric hybrid-driven water-pumping compressed air hybrid energy storage system comprises a wind wheel, a water pump, a water-gas co-container tank, a water turbine, a generator, a water tank, a compressor and a first electric motor. The water pump, the water-gas co-container tank, the water turbine and the water tank are connected in a circular manner to form a water system. The water-gas co-container tank is connected to the compressor to form an air system. The output ends of the wind wheel and the first electric motor are connected to the input end of the water pump to form a driving system. The output end of the water turbine is connected to the input end of the generator to form an energy release system.

[0008] Preferably: in the water system, the lower part of the water-gas co-containment tank has a water outlet and a water inlet, the water inlet of the water-gas co-containment tank is connected to the outlet of the water pump, the water outlet of the water-gas co-containment tank is connected to the inlet of the turbine, and the outlet end of the first connecting pipe connecting the water pool and the water pump is located below the water surface in the water pool.

[0009] Preferably: the water system also includes a first safety valve, a third safety valve, a first electric valve, a second electric valve, a third electric valve, a fourth electric valve, a one-way valve, a first accumulator and a second accumulator. The first safety valve, the first accumulator and the third electric valve are sequentially arranged on the second connecting pipe connecting the outlet of the water pump and the water inlet of the water-gas co-containing tank. The first accumulator and the second connecting pipe are connected through the first electric valve. The third connecting pipe connecting the water outlet of the water-gas co-containing tank and the inlet of the turbine are sequentially arranged with the third safety valve, the fourth electric valve and the second accumulator. The second accumulator is connected to the third connecting pipe through the second electric valve, and the first connecting pipe is provided with a one-way valve.

[0010] Preferably: in the gas circuit system, the upper portion of the water-gas co-containment tank has an opening, and the opening of the water-gas co-containment tank is connected to the compressor;

[0011] It also includes a fifth electric valve, and the compressor is connected to the opening of the water-gas co-containment tank through the fifth electric valve.

[0012] Preferably: it also includes a liquid level gauge, a blade, a pressure sensor, a second motor and a second safety valve, the top of the inner cavity of the water-gas co-containment tank is provided with a blade, the output end of the second motor is connected to the blade, the upper end of the water-gas co-containment tank is provided with a second safety valve, the inner cavity side wall of the water-gas co-containment tank is provided with a pressure sensor and a liquid level gauge, the liquid level gauge has an upper limit water level detection end and a lower limit water level detection end, the height of the upper limit water level detection end is greater than the height of the pressure sensor and greater than the height of the lower limit water level detection end.

[0013] Preferably: the energy storage system further includes a planetary gear speed increasing device, a first clutch and a second clutch, the wind wheel output end, the planetary gear speed increasing device, the first clutch and the input end of the water pump are connected in sequence, and the output end of the first motor is connected to the input end of the water pump through the second clutch.

[0014] Preferably, the first motor and the second motor are both powered by a power grid.

[0015] A wind-electric hybrid drive water pumping compressed air hybrid energy storage method, using the wind-electric hybrid drive water pumping compressed air hybrid energy storage system, comprises the following steps:

[0016] Pressure prefabrication conditions;

[0017] Wind-driven energy storage conditions;

[0018] Electric drive energy storage conditions;

[0019] Power generation conditions;

[0020] Wind-driven energy storage and power generation operate in parallel.

[0021] Preferred: Pressure prefabrication condition: before the system is operated for the first time, the system will operate in the pressure prefabrication condition; the fifth electric valve is opened, and other valves are closed; the compressor is started to fill the water-gas co-container with gas, and when the pressure of the water-gas co-container reaches the set value p1, the pressure prefabrication process ends;

[0022] Wind-driven energy storage working condition: When wind energy resources are abundant and the water level in the water-gas co-containment tank is less than the set upper limit water level h2, this system can operate under the wind-driven energy storage working condition; the first clutch is connected, the second clutch is disconnected, the first electric valve, the third electric valve and the one-way valve are opened, and other valves are closed; the wind energy drives the wind wheel to rotate, and after the planetary gear speed increase device increases the speed, it drives the water pump to rotate to draw water from the pool into the water-gas co-containment tank to compress the air for energy storage; when the liquid level value measured by the liquid level meter reaches the set upper limit liquid level h2, the wind-driven energy storage process ends;

[0023] Electric-driven energy storage condition: When the power grid is abundant, the wind energy resource intensity is average, and the water level in the water-gas storage tank is less than the upper limit water level h2, the system operates in the power grid-driven energy storage condition; the first clutch is disconnected, the second clutch is connected, the first electric valve, the third electric valve and the one-way valve are opened, and the other valves are closed; the remaining electric energy in the power grid drives the first motor to rotate, driving the water pump to rotate and pump water, and the water in the pool is pumped into the water-gas co-container tank to compress the air for energy storage; when the liquid level value measured by the level meter reaches the set upper limit liquid level h2, the electric-driven energy storage process ends;

[0024] Power generation condition: When the water level in the water-gas co-containment tank is greater than the lower limit water level h1 and the power grid is insufficient, the system operates in the power generation condition; the second electric valve and the fourth electric valve are opened, the air in the water-gas co-containment tank expands, and the water at the bottom of the water-gas co-containment tank is discharged to the turbine, driving the turbine to rotate and drive the generator to rotate and generate electricity; when the liquid level value measured by the liquid level meter is less than the set lower limit liquid level h1, the power generation operation process ends;

[0025] Wind-driven energy storage and power generation operate in parallel: When wind energy resources are abundant and grid electricity is insufficient, the system operates in a wind-driven energy storage and power generation parallel operation condition; under this condition, the first clutch is connected, the second clutch is disconnected, the first electric valve, the second electric valve, the third electric valve, the fourth electric valve and the one-way valve are opened, and the other valves are closed; the wind energy drives the water pump to rotate to draw water from the pool into the water-gas co-container tank to compress air for energy storage, and the water at the bottom of the water-gas co-container tank is discharged to the turbine to generate power, and the water after power generation is returned to the pool.

[0026] The present invention has the following beneficial effects:

[0027] The present invention adopts a mixed drive mode of wind energy and grid electric energy. When wind energy resources are insufficient, the surplus electric energy of the grid can be used for energy storage; when wind energy resources are abundant, wind energy can be used for energy storage.

[0028] The present invention can utilize artificial containers to store energy, has flexible site selection, ingenious structure, convenient operation and maintenance, and can monitor the pressure water level in real time.

[0029] The present invention replaces the compressor with a water pump and replaces the expander with a water turbine, and the large-scale electric-electric conversion efficiency is higher.

[0030] The present invention promotes the flow of air in the water-gas co-containment tank by rotating the blades on the top of the tank, thereby enhancing the heat transfer performance between air and water, realizing a near-isothermal compression and expansion process of the system, and improving the round-trip efficiency of the system.

[0031] The present invention does not require additional fossil fuel input during each operation process of the system, and is more environmentally friendly.

[0032] The present invention is used to absorb wind energy and has good application prospects under the background of green and low-carbon transformation of energy structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of a wind-electric hybrid-driven water-pumped compressed air hybrid energy storage system described in a specific implementation manner of the present invention.

[0034] Figure 2 It is a schematic diagram of a pressure prefabrication working condition operation method of a wind-electric hybrid drive water-pumped compressed air hybrid energy storage system described in a specific embodiment of the present invention.

[0035] Figure 3 It is a schematic diagram of a wind-driven energy storage and electric-driven energy storage operating method of a wind-electric hybrid-driven water-pumped compressed air hybrid energy storage system described in a specific embodiment of the present invention.

[0036] Figure 4It is a schematic diagram of a method for operating a wind-electric hybrid drive water-pumped compressed air hybrid energy storage system in a power generation condition according to a specific embodiment of the present invention.

[0037] Figure 5 It is a schematic diagram of a method for operating wind-driven energy storage and power generation in parallel in a wind-electric hybrid-driven water-pumped compressed air hybrid energy storage system according to a specific embodiment of the present invention.

[0038] In the figure, 1-wind wheel, 2-planetary gear speed increasing device, 31-first clutch, 32-second clutch, 4-water pump, 51-first motor, 52-second motor, 61-first safety valve, 62-second safety valve, 63-third safety valve, 71-first electric valve, 72-second electric valve, 73-third electric valve, 74-fourth electric valve, 75-fifth electric valve, 76-check valve, 81-first accumulator, 82-second accumulator, 9-water-gas co-containment tank, 10-turbine, 11-generator, 12-water tank, 13-power grid, 14-liquid level meter, 15-blade, 16-compressor, 17-pressure sensor. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below by the specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0040] Specific implementation method 1: Combination Figure 1 The present embodiment is described. A wind-electric hybrid-driven water-pumping compressed air hybrid energy storage system of the present embodiment comprises a wind wheel 1, a water pump 4, a water-gas co-containment tank 9, a water turbine 10, a generator 11, a water tank 12, a compressor 16 and a first motor 51. The water pump 4, the water-gas co-containment tank 9, the water turbine 10 and the water tank 12 are sequentially connected through a pipeline loop to form a water system. The water-gas co-containment tank 9 is connected to the compressor 16 to form an air system. The driving output ends of the wind wheel 1 and the first motor 51 are connected to the driving input end (water pump shaft) of the water pump 4 to form a driving system. The driving output end (water turbine shaft) of the water turbine 10 is connected to the driving input end (generator shaft) of the generator 11 to form an energy release system. The present invention can utilize the water-gas co-containment tank 9, and the site selection is more flexible. The present invention replaces the compressor with a water pump and replaces the expander with a water turbine. The large-scale electric-electric conversion efficiency is higher.

[0041] In the water system, the lower part of the water-gas co-containment tank 9 has a water outlet and a water inlet, the water inlet of the water-gas co-containment tank 9 is connected to the outlet of the water pump 4, the water outlet of the water-gas co-containment tank 9 is connected to the inlet of the turbine 10, the outlet end of the first connecting pipe connecting the water pool 12 and the water pump 4 is located below the water surface in the water pool 12, and has a gap with the bottom of the water pool 12, and the inlet end of the first connecting pipe is located above the water surface in the water pool 12;

[0042] The water system also includes a first safety valve 61, a third safety valve 63, a first electric valve 71, a second electric valve 72, a third electric valve 73, a fourth electric valve 74, a one-way valve 76, a first accumulator 81 and a second accumulator 82. The first safety valve 61, the first accumulator 81 and the third electric valve 73 are sequentially arranged on the second connecting pipe connecting the outlet of the water pump 4 and the water inlet of the water-gas co-containment tank 9. The first accumulator 81 is connected to the second connecting pipe through the first electric valve 71. The third safety valve 63, the fourth electric valve 74 and the second accumulator 82 are sequentially arranged on the third connecting pipe connecting the water outlet of the water-gas co-containment tank 9 and the inlet of the turbine 10. The second accumulator 82 is connected to the third connecting pipe through the second electric valve 72. The one-way valve 76 is arranged on the first connecting pipe.

[0043] In the gas circuit system, the upper portion of the water-gas co-containment tank 9 has an opening, and the opening of the water-gas co-containment tank 9 is connected to the compressor 16;

[0044] The gas circuit system further includes a fifth electric valve 75, through which the compressor 16 is connected to the opening of the water-gas co-container tank 9;

[0045] It also includes a liquid level gauge 14, a blade 15, a pressure sensor 17, a second motor 52 and a second safety valve 62. The top of the inner cavity of the water-gas co-containment tank 9 is provided with a blade 15, and the output end of the second motor 52 is connected to the blade 15. The upper end of the water-gas co-containment tank 9 is provided with a second safety valve 62. The inner cavity side wall of the water-gas co-containment tank 9 is provided with a pressure sensor 17 and a liquid level gauge 14. The liquid level gauge 14 has an upper limit water level detection end and a lower limit water level detection end. The height of the upper limit water level detection end is greater than the height of the pressure sensor 17 and the height of the lower limit water level detection end, and is used to detect the pressure and liquid level of the water-gas co-containment tank 9. The present invention promotes the flow of air in the tank by rotating the blades on the top of the water-gas co-containment tank, thereby enhancing the heat transfer performance between air and water, realizing the near-isothermal compression and expansion process of the system, and improving the round-trip efficiency of the system.

[0046] The energy storage system further includes a planetary gear speed increasing device 2, a first clutch 31 and a second clutch 32. The output end of the wind wheel 1, the planetary gear speed increasing device 2, the first clutch 31 and the input end of the water pump 4 are connected in sequence, and the output end of the first motor 51 is connected to the input end of the water pump 4 through the second clutch 32.

[0047] Both the first motor 51 and the second motor 52 can be powered by the power grid 13; the present invention adopts a mixed drive mode of wind energy and power grid electricity. When wind energy resources are insufficient, the remaining power of the power grid can be used to drive the system for energy storage; when wind energy resources are abundant, wind energy can be used to drive the system for energy storage.

[0048] Specific implementation method 2: Combination Figure 2-4 The present embodiment is described. A wind-electric hybrid drive water pumping compressed air hybrid energy storage method of the present embodiment adopts a wind-electric hybrid drive water pumping compressed air hybrid energy storage system, including a wind wheel, a planetary gear speed increasing device, a clutch, a water pump, an electric motor, an accumulator, a water-gas co-container tank, a water turbine, a generator and other equipment;

[0049] The wind wheel 1 is coaxially connected with the planetary gear speed increaser 2; the planetary gear speed increaser 2 is connected to one end of the rotating shaft of the water pump 4 through the first clutch 31, and the first motor 51 is connected to the other end of the rotating shaft of the water pump 4 through the second clutch 32; the wind wheel 1 is used to capture wind energy and convert it into rotational mechanical energy; the planetary gear speed increaser 2 is used to increase the rotation speed provided by the wind wheel 1; the water pump 4 is used to draw water from the water pool 12 into the water-gas co-container 9 to compress air for energy storage; the first motor 51 is used to convert electrical energy into rotational mechanical energy;

[0050] The water pump 4 includes a water inlet and a water outlet. The water inlet is connected to the water pool 12, and the water outlet is connected to the first safety valve 61, the first accumulator 81 and the water-gas co-container 9 in sequence; the first accumulator 81 is used to smooth the water pressure potential energy in the pipeline. When the water pressure potential energy in the pipeline is small, it is supplemented; when the water pressure potential energy in the pipeline is large, part of the water pressure potential energy is reduced;

[0051] The bottom of the water-gas co-container tank 9 includes a water inlet and a water outlet, the water inlet is connected to the water outlet of the water pump 4; the water outlet is connected to the water inlet of the turbine 10;

[0052] The water turbine 10 includes a water inlet end and a water outlet end, the water inlet end is connected to the second accumulator 82 and the third safety valve 63 in sequence and then connected to the water outlet of the water-gas co-containment tank 9; the water outlet end is connected to the water tank 12; the water turbine 10 is used to convert the water pressure potential energy in the water body discharged from the water-gas co-containment tank 9 into rotational mechanical energy; the water turbine 10 is coaxially connected to a generator 11, and the generator 11 can be used to convert the rotational mechanical energy provided by the water turbine 10 into electrical energy;

[0053] A blade 15 is installed on the top of the water-gas co-containment tank 9, which is coaxially connected to a second motor 52; during the energy storage and power generation process, the electric energy drives the motor 52 to rotate, driving the blade 15 to rotate, the air flow in the water-gas co-containment tank 9 is strengthened, the relative movement speed between the air and the water is increased, and the heat transfer performance between the air and the water is enhanced;

[0054] A compressor 16 is connected to one side of the water-gas co-containment tank 9, which can be used to fill the water-gas co-containment tank 9 with pressurized gas. A liquid level gauge 14 is installed on the side of the water-gas co-containment tank 9;

[0055] The method comprises the following steps:

[0056] Pressure prefabrication condition: before the system is operated for the first time, the system will operate in the pressure prefabrication condition; in this condition, the fifth electric valve 75 is opened and other valves are closed; the compressor 16 is started to fill the water-gas co-container tank 9 with pressurized gas, and when the pressure of the water-gas co-container tank 9 reaches the set value p1, the pressure prefabrication process ends;

[0057] Wind-driven energy storage working condition: When wind energy resources are abundant and the water level in the water-gas co-containment tank 9 is less than the set upper limit water level h2, the system can operate under the wind-driven energy storage working condition; at this time, the first clutch 31 is connected, the second clutch 32 is disconnected, the first electric valve 71, the third electric valve 73 and the one-way valve 76 are opened, and other valves are closed; the wind energy drives the wind wheel 1 to rotate, and after the planetary gear speed increaser 2 increases the speed, the water pump 4 is driven to rotate to extract the water in the pool 12 into the water-gas co-containment tank 9 to compress the air for energy storage; when the liquid level value measured by the liquid level meter 14 reaches the set upper limit liquid level h2, the wind-driven energy storage process ends; the present invention is used to absorb wind energy, and has good application prospects in the context of green and low-carbon transformation of energy structure;

[0058] Electric-driven energy storage condition: When the power grid is rich, the wind energy resource intensity is average, and the water level in the water-gas storage tank 9 is less than the upper limit water level h2, the system operates in the power grid-driven energy storage condition; at this time, the first clutch 31 is disconnected, the second clutch 32 is connected, the first electric valve 71, the third electric valve 73 and the one-way valve 76 are opened, and the other valves are closed; the remaining electric energy in the power grid 13 drives the first motor 51 to rotate, driving the water pump 4 to rotate and pump water, and the water in the pool 11 is drawn into the water-gas co-container tank 9 to compress the air for energy storage; when the liquid level value measured by the liquid level meter 14 reaches the set upper limit liquid level h2, the electric-driven energy storage process ends;

[0059] Power generation condition: when the water level in the water-gas co-containment tank 9 is greater than the lower limit water level h1 and the power grid is insufficient, the system operates in the power generation condition; at this time, the second electric valve 72 and the fourth electric valve 74 are opened, the air in the water-gas co-containment tank 9 expands, and the water at the bottom of the water-gas co-containment tank 9 is discharged to the turbine 10, driving the turbine 10 to rotate, driving the generator 11 to rotate and generate electricity; the power generated by the motor 11 can be transmitted to the power grid; when the liquid level value measured by the liquid level meter 14 is less than the set lower limit liquid level h1, the power generation operation process ends;

[0060] Wind-driven energy storage and power generation operating in parallel: When wind energy resources are abundant and grid electricity is insufficient, the system operates in wind-driven energy storage and power generation operating in parallel; under this condition, the first clutch 31 is connected, the second clutch 32 is disconnected, the first electric valve 71, the second electric valve 72, the third electric valve 73, the fourth electric valve 74 and the one-way valve 76 are opened, and the other valves are closed; the wind energy drives the water pump 4 to rotate to draw water from the pool 12 into the water-gas co-containment tank 9 for compressed air energy storage, and the water at the bottom of the water-gas co-containment tank 9 is discharged to the turbine 10 to generate power, and the water after power generation is returned to the pool 12; the present invention does not require additional fossil fuel input during the various operating processes of the system, and is more environmentally friendly.

[0061] It should be noted that in the above embodiments, as long as the technical solutions are not contradictory, they can be arranged and combined, and those skilled in the art can exhaust all possibilities based on the mathematical knowledge of arrangement and combination. Therefore, the present invention will no longer describe the technical solutions after arrangement and combination one by one, but it should be understood that the technical solutions after arrangement and combination have been disclosed by the present invention.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wind-electric hybrid drive water-pumping compressed air hybrid energy storage system, characterized by: The invention comprises a wind wheel (1), a water pump (4), a water-gas co-containment tank (9), a water turbine (10), a generator (11), a water tank (12), a compressor (16) and a first electric motor (51); the water pump (4), the water-gas co-containment tank (9), the water turbine (10) and the water tank (12) are connected in a circular manner in sequence to form a water system; the water-gas co-containment tank (9) is connected to the compressor (16) to form an air system; the output ends of the wind wheel (1) and the first electric motor (51) are connected to the input end of the water pump (4) to form a drive system; the output end of the water turbine (10) is connected to the input end of the generator (11) to form an energy release system.

2. A wind-electric hybrid drive water-pumped compressed air hybrid energy storage system according to claim 1, characterized in that: In the water system, the lower part of the water-gas co-containment tank (9) has a water outlet and a water inlet, the water inlet of the water-gas co-containment tank (9) is connected to the outlet of the water pump (4), the water outlet of the water-gas co-containment tank (9) is connected to the inlet of the turbine (10), and the outlet end of the first connecting pipe connecting the water pool (12) and the water pump (4) is located below the water surface in the water pool (12).

3. A wind-electric hybrid drive water-pumped compressed air hybrid energy storage system according to claim 2, characterized in that: The water system also includes a first safety valve (61), a third safety valve (63), a first electric valve (71), a second electric valve (72), a third electric valve (73), a fourth electric valve (74), a check valve (76), a first accumulator (81) and a second accumulator (82); the first safety valve (61), the first accumulator (81) and the third electric valve (73) are sequentially arranged on a second connecting pipe connecting the outlet of the water pump (4) and the water inlet of the water-gas co-containment tank (9); the first accumulator (81) and the second connecting pipe are connected via the first electric valve (71); the third safety valve (63), the fourth electric valve (74) and the second accumulator (82) are sequentially arranged on the third connecting pipe connecting the water outlet of the water-gas co-containment tank (9) and the inlet of the turbine (10); the second accumulator (82) is connected to the third connecting pipe via the second electric valve (72); and the check valve (76) is arranged on the first connecting pipe.

4. A wind-electric hybrid drive water-pumped compressed air hybrid energy storage system according to claim 2, characterized in that: In the gas circuit system, the upper portion of the water-gas co-containment tank (9) has an opening, and the opening of the water-gas co-containment tank (9) is connected to the compressor (16); It also includes a fifth electric valve (75), and the compressor (16) is connected to the opening of the water-gas co-containment tank (9) via the fifth electric valve (75).

5. A wind-electric hybrid drive water-pumped compressed air hybrid energy storage system according to any one of claims 1 to 4, characterized in that: The device also comprises a liquid level meter (14), a blade (15), a pressure sensor (17), a second motor (52) and a second safety valve (62); the blade (15) is arranged at the top of the inner cavity of the water-gas co-containment tank (9); the output end of the second motor (52) is connected to the blade (15); the upper end of the water-gas co-containment tank (9) is provided with a second safety valve (62); the inner cavity side wall of the water-gas co-containment tank (9) is provided with a pressure sensor (17) and a liquid level meter (14); the liquid level meter (14) has an upper limit water level detection end and a lower limit water level detection end; the height of the upper limit water level detection end is greater than the height of the pressure sensor (17) and the height of the lower limit water level detection end.

6. A wind-electric hybrid drive water-pumped compressed air hybrid energy storage system according to claim 5, characterized in that: The energy storage system further comprises a planetary gear speed increasing device (2), a first clutch (31) and a second clutch (32); the output end of the wind wheel (1), the planetary gear speed increasing device (2), the first clutch (31) and the input end of the water pump (4) are connected in sequence; and the output end of the first motor (51) is connected to the input end of the water pump (4) via the second clutch (32).

7. A wind-electric hybrid drive water-pumped compressed air hybrid energy storage system according to claim 6, characterized in that: The first motor (51) and the second motor (52) are both powered by a power grid (13).

8. A wind-electric hybrid drive water-compressed air hybrid energy storage method, characterized by: A wind-electric hybrid drive water-pumped compressed air hybrid energy storage system according to any one of claims 1 to 7 comprises the following steps: Pressure prefabrication conditions; Wind-driven energy storage conditions; Electric drive energy storage conditions; Power generation conditions; Wind-driven energy storage and power generation operate in parallel.

9. A wind-electric hybrid drive water-compressed air hybrid energy storage method according to claim 8, characterized in that: Pressure prefabrication condition: before the system is operated for the first time, the system will operate in the pressure prefabrication condition; the fifth electric valve (75) is opened, and the other valves are closed; the compressor (16) is started to fill the water-gas co-container tank (9) with gas, and when the pressure of the water-gas co-container tank (9) reaches the set value p1, the pressure prefabrication process ends; Wind-driven energy storage working condition: when wind energy resources are abundant and the water level in the water-gas co-containment tank (9) is less than the set upper limit water level h2, the system can operate in the wind-driven energy storage working condition; the first clutch (31) is connected, the second clutch (32) is disconnected, the first electric valve (71), the third electric valve (73) and the one-way valve (76) are opened, and the other valves are closed; the wind energy drives the wind wheel (1) to rotate, and after the planetary gear speed increasing device (2) increases the speed, the water pump (4) is driven to rotate to draw water from the pool (12) into the water-gas co-containment tank (9) to compress the air for energy storage; when the liquid level value measured by the liquid level meter (14) reaches the set upper limit liquid level h2, the wind-driven energy storage process ends; Electric-driven energy storage condition: when the power grid is rich in electricity, the wind energy resource intensity is average, and the water level in the water-gas storage tank (9) is less than the upper limit water level h2, the system operates in the electric-driven energy storage condition; the first clutch (31) is disconnected, the second clutch (32) is connected, the first electric valve (71), the third electric valve (73) and the one-way valve (76) are opened, and the other valves are closed; the remaining electric energy in the electric grid (13) drives the first motor (51) to rotate, driving the water pump (4) to rotate and pump water, and the water in the pool (11) is pumped into the water-gas co-container tank (9) to compress the air for energy storage; when the liquid level value measured by the liquid level meter (14) reaches the set upper limit liquid level h2, the electric-driven energy storage process ends; Power generation condition: when the water level in the water-gas co-containment tank (9) is greater than the lower limit water level h1 and the power grid is insufficient, the system operates in the power generation condition; the second electric valve (72) and the fourth electric valve (74) are opened, the air in the water-gas co-containment tank (9) expands, and the water at the bottom of the water-gas co-containment tank (9) is discharged to the turbine (10), driving the turbine (10) to rotate, driving the generator (11) to rotate and generate electricity; when the liquid level value measured by the liquid level meter (14) is less than the set lower limit liquid level h1, the power generation operation process ends; Wind-driven energy storage and power generation operating in parallel: When wind energy resources are abundant and grid power is insufficient, the system operates in wind-driven energy storage and power generation operating in parallel; Under this working condition, the first clutch (31) is connected, the second clutch (32) is disconnected, the first electric valve (71), the second electric valve (72), the third electric valve (73), the fourth electric valve (74) and the one-way valve (76) are opened, and the other valves are closed; the wind energy drives the water pump (4) to rotate to draw water from the pool (12) into the water-gas co-container (9) to store compressed air energy, and the water at the bottom of the water-gas co-container (9) is discharged to the turbine (10) to generate electricity, and the water after power generation is returned to the pool (12).

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