Hydraulic compressed air energy storage power generation device system

Abstract

The utility model provides a hydraulic compressed air energy storage power generation device system which comprises an air energy storage module, a power generation module and a turnover water tank. The air energy storage module comprises an air compression device, an air storage container and a water storage container, the air compression device is respectively communicated with the air storage container and the water storage container, the air storage container is connected with the water storage container through an air expansion pipe network, and the water storage container is connected with the turnover water tank through an energy storage water injection pipe network; the power generation module comprises a high-voltage hydroelectric generation device, a low-voltage hydroelectric generation device and a frequency conversion rectifying device, one end of the high-voltage hydroelectric generation device is connected with the water storage container through an energy releasing water conveying pipe network, and the other end of the high-voltage hydroelectric generation device is connected with the turnover water tank. The frequency conversion rectifying device is electrically connected with the high-voltage hydroelectric generation device and the low-voltage hydroelectric generation device. According to the utility model, hydraulic power is used for compressing air to store energy, the energy storage density is large, the power generation efficiency is high, and the output power is stable through variable-frequency rectification regulation.

Description

Technical Field

[0001] This utility model belongs to the field of energy storage and power generation technology, and relates to a hydraulic compressed air energy storage and power generation device system. Background Technology

[0002] Currently, the energy storage field mainly includes battery energy storage, compressed air energy storage, and pumped storage energy storage. Among them, battery energy storage is relatively flexible in scale and mainly stores electrical energy. Compressed air energy storage converts electrical energy into physical mechanical energy, while pumped storage energy storage utilizes gravity based on the elevation difference of the site. With technological advancements, compressed air energy storage technology, due to its high stability and large capacity, has been continuously innovated and is widely used in various energy storage and release sites.

[0003] CN203783858U discloses a compressed air energy storage and power generation device, including an air compressor unit, an electric motor, a cooler, an air storage tank, a heating device, a turbine expander unit, and a generator. The electric motor is connected to the air compressor unit, which is sequentially connected to the cooler, the air storage tank, the heating device, and the turbine expander unit. The turbine expander unit is connected to the generator. The outlet of the air compressor unit is connected to the cooler through a first pipeline. The compressed air energy storage and power generation device also includes a pressure measuring device and a shut-off valve installed on the first pipeline. The pressure measuring device is installed at the outlet of the air compressor unit. A booster pipeline is connected in parallel at both ends of the shut-off valve. A booster baffle and a booster device are installed on the booster pipeline. It makes full use of off-peak electricity and abandoned electricity, and can compress air to the maximum pressure that the air storage tank can withstand, so that the compressed air can expand better to generate electricity.

[0004] CN219774208U discloses an energy storage distributed utilization system based on an industrial compressed air system, including an air booster system with an air storage device. The air storage device is connected to a first compressed air utilization system, a second compressed air utilization system, and a third compressed air utilization system. Each of the first to third compressed air utilization systems includes a heater, an expander, a cold energy heat exchanger, and a compressed air storage tank. In this way, the cold energy heat exchanger is used to exchange heat with the low-pressure gas after energy release for power generation, so as to produce cold energy to supply cooling for industrial users and even buildings in the surrounding area, reducing the peak load on the power grid. At the same time, with the setting of the three compressed air utilization systems, low-pressure gas with different pressure values ​​is stored, so that it can be distributed to the required compressed gas with different pressure values ​​for energy release and power generation again.

[0005] However, existing compressed air energy storage systems require large pressurized space volumes, have stringent site selection requirements, and are costly. Furthermore, the use of air expanders for power generation results in low efficiency, high energy consumption, and increased production investment and operating costs. In addition, the structural limitations of these energy storage systems lead to unstable power output, which can cause grid fluctuations. Therefore, it is necessary to improve compressed air energy storage systems to enhance their power generation efficiency and address the problem of unstable power supply fluctuations. Utility Model Content

[0006] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a hydraulic compressed air energy storage and power generation device system. By using hydraulic compressed air energy storage, the energy storage density and power generation efficiency are improved, while the problem of unstable power output is solved.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] This utility model provides a hydraulic compressed air energy storage and power generation system, including an air energy storage module, a power generation module, and a transfer water tank. The air energy storage module includes an air compressor, an air storage container, and a water storage container. The air compressor is connected to both the air storage container and the water storage container. The air storage container is connected to the water storage container via a gas expansion pipeline network. The water storage container is connected to the transfer water tank via an energy storage water injection pipeline network. A regulating pump group is installed on the energy storage water injection pipeline network. The power generation module includes a high-pressure hydraulic power generation device, a low-pressure hydraulic power generation device, and a frequency converter. One end of the high-pressure hydraulic power generation device is connected to the water storage container via an energy release water supply pipeline network, and the other end is connected to the transfer water tank. The low-pressure hydraulic power generation device is connected in parallel with the high-pressure hydraulic power generation device. The frequency converter is electrically connected to both the high-pressure and low-pressure hydraulic power generation devices.

[0009] This invention utilizes an air compressor to provide compressed air, employs a pressure vessel to store the compressed air, and increases the pressure of the compressed air through hydraulic compression, thereby enhancing the energy storage density. It replaces air expansion power generation with hydroelectric power generation, effectively improving power generation efficiency. At the same time, it uses a power generation device with high and low pressure heads to improve energy conversion efficiency, and sets up a frequency converter to regulate the power supply current of the power generation device, solving the problem of stable power output.

[0010] As a preferred embodiment of this utility model, the regulating pump group includes a high-pressure pump assembly and a low-pressure pump assembly arranged in parallel.

[0011] This invention switches between the high-pressure pump assembly and the low-pressure pump assembly based on the air pressure inside the gas storage container and the water storage container, ensuring stable water pressure changes and improving energy conversion efficiency.

[0012] As a preferred embodiment of this invention, a throttling device is provided on the gas expansion pipeline.

[0013] This invention, by setting a throttling device to adjust the flow rate of compressed air output, maintains a stable water pressure entering the power generation module, which is beneficial to maintaining the stability and smooth fluctuation of the power output of the power generation device.

[0014] As a preferred embodiment of this utility model, the outer peripheral walls of the gas storage container and the water storage container are independently provided with heat exchange components.

[0015] This invention utilizes the heat generated by the compression of air during energy storage through the setting of heat exchange components for heating or other purposes, and achieves a cooling function based on the principle that air expands and absorbs heat when releasing energy.

[0016] As a preferred embodiment of the present invention, the gas storage container includes at least one gas storage tank, and the water storage container includes a plurality of water storage tanks arranged in parallel and / or in series.

[0017] As a preferred embodiment of this utility model, the top of the water storage tank is connected to the gas expansion pipeline network, and the bottom of the water storage tank is connected to the energy release water pipeline network.

[0018] As a preferred embodiment of this utility model, an atomizing spray assembly is provided at the top of the inner cavity of the water storage tank, and the atomizing spray assembly is connected to the energy storage water injection network.

[0019] This invention enhances the heat exchange between water and air through atomized spraying. During energy storage, it can fully absorb the heat generated by air compression and release the heat into the air in a timely manner during energy release, thereby maintaining a constant air temperature. This solves the problem of automatic energy storage and release based on the heat release process of air expansion and heat absorption process of compression.

[0020] In a preferred embodiment of this invention, the air compressor is connected to the air storage tank via a first air pipe, and the air storage tank is connected to the water storage tank via a second air pipe.

[0021] As a preferred embodiment of this utility model, the air compressor device includes an air compressor or a high-pressure blower.

[0022] As a preferred embodiment of this utility model, the gas expansion pipeline, the energy storage water injection pipeline, and the energy release water delivery pipeline are each equipped with an independent regulating valve.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] This utility model provides a hydraulic compressed air energy storage and power generation system that is flexible in scale and independent of geological conditions. By using hydraulic compressed air energy storage, the energy storage density is increased. By utilizing the real-time heat exchange between water and air, near-isothermal compression and isothermal expansion of air are achieved, thereby improving the energy conversion rate. At the same time, by combining energy storage with the hydropower generation device, high-efficiency conversion of electrical energy is achieved. Furthermore, a frequency converter and rectifier are set up to ensure the stability and smooth fluctuation of the power output of the power generation device, resulting in a power generation efficiency of over 80%, which greatly improves the working efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the hydraulic compressed air energy storage and power generation device system provided in Embodiment 1 of this utility model.

[0026] Among them, 1-air compressor; 2-air storage tank; 31-first water storage tank; 32-second water storage tank; 33-third water storage tank; 4-first heat exchange component; 5-second heat exchange component; 6-high-pressure hydroelectric power generation device; 7-low-pressure hydroelectric power generation device; 8-frequency conversion rectifier device; 9-throttling device; 10-transfer water tank; 11-atomizing spray component; 12-high-pressure pump component; 13-low-pressure pump component. Detailed Implementation

[0027] It should be understood that in the description of this utility model, the terms "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0028] It should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] Those skilled in the art should understand that this utility model necessarily includes the necessary pipelines, conventional valves and general pump equipment for achieving complete process, but the above content is not the main improvement of this utility model. Those skilled in the art can add layouts based on the process flow and equipment structure selection. This utility model does not make any special requirements or specific limitations in this regard.

[0030] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0031] In one specific embodiment, this utility model provides a hydraulic compressed air energy storage and power generation device system, including an air energy storage module, a power generation module, and a transfer water tank. The air energy storage module includes an air compressor, an air storage container, and a water storage container. The air compressor is connected to both the air storage container and the water storage container, and is used to inject compressed air into both containers. The air storage container is connected to the water storage container via a gas expansion pipeline network, and the water storage container is connected to the transfer water tank via an energy storage water injection pipeline network. A regulating pump set is installed on the energy storage water injection pipeline network. The transfer water tank stores water. During energy storage, water is injected into the water storage container and undergoes sufficient heat exchange with the compressed air, causing the compressed air to be compressed to high pressure at a near-constant temperature for storage.

[0032] The power generation module includes a high-pressure hydroelectric generator, a low-pressure hydroelectric generator, and a frequency converter. One end of the high-pressure hydroelectric generator is connected to the water storage container via an energy release water supply network, and the other end is connected to the transfer water tank. The low-pressure hydroelectric generator is connected in parallel with the high-pressure hydroelectric generator. During energy release, compressed air pushes water through the energy release water supply network into either the high-pressure or low-pressure hydroelectric generator, using water power to drive the power generation equipment to generate electricity. After the power generation is complete, the water returns to the transfer water tank to begin the next energy storage cycle. The frequency converter is electrically connected to both the high-pressure and low-pressure hydroelectric generators. During energy release, the compressed air in the air storage container expands, driving the water in the water storage container to power the high-pressure hydroelectric generator. After the power generation is complete, the water flows into the transfer water tank. When the pressure drops below a first preset value, the high-pressure hydroelectric generator stops generating electricity, while the low-pressure hydroelectric generator starts until the pressure drops to a second preset value, ending the power generation process. Furthermore, throughout the power generation process, the electricity generated by the high-pressure and low-pressure hydroelectric power generation devices is stably output through a frequency converter and rectifier to improve energy conversion efficiency. This invention does not specifically limit the first and second preset values; those skilled in the art can adjust them according to actual process requirements.

[0033] In some embodiments, the air storage container includes at least one air tank for storing compressed air. The water storage container includes several water tanks arranged in parallel and / or series for storing compressed air and water, and both the air tank and the water tank are closed high-pressure containers, allowing heat exchange between water and air under approximately constant temperature conditions. This invention does not impose specific limitations on the number, volume, and shape of the air tank and water tank; those skilled in the art can make adjustments according to actual conditions.

[0034] The top of the gas storage tank is connected to one end of the gas expansion pipeline network, and the top of the water storage tank is connected to the other end of the gas expansion pipeline network. During energy storage, the water in the water storage tank hydraulically compresses the air, causing the compressed air to enter the gas storage tank through the gas expansion pipeline network. The gas expansion pipeline network can consist of multiple branch pipes connecting the gas storage tank and the water storage tank, and those skilled in the art can install regulating valves on the branch pipes for control according to process requirements.

[0035] Furthermore, a throttling device is installed on the gas expansion pipeline to maintain a stable water pressure entering the hydroelectric power generation device. Simultaneously, the electricity generated by the hydroelectric power generation device is stabilized through a frequency converter and rectifier. After power generation ends, the system enters the next energy storage cycle, thus performing energy storage and generation as needed. This invention does not specifically limit the structure of the throttling device; any throttling device well-known to those skilled in the art can be used. For example, the throttling device can consist of at least two throttling valves connected in parallel on the gas expansion pipeline. By throttling and reducing the pressure of the air in the gas expansion pipeline, the flow rate of the compressed air output is adjusted to maintain a pressure difference, thereby stabilizing the water pressure entering the power generation module.

[0036] The bottom of the water storage tank is connected to the power generation module via the energy release water supply network. During energy release, air pushes water through the energy release water supply network into the power generation module to drive the power generation device to perform work. The energy release water supply network can consist of multiple branch pipes connecting the water storage tank and the power generation module, and those skilled in the art can install regulating valves on the branch pipes for control according to process requirements.

[0037] Furthermore, an atomizing spray assembly is installed at the top of the inner cavity of the water storage tank. This atomizing spray assembly is connected to the transfer water tank via the energy storage water injection network. During energy storage, the regulating pump unit draws water from the transfer water tank into the energy storage water injection network and injects it into the atomizing spray assembly, atomizing the water and spraying it to ensure sufficient contact between the water and air for heat exchange, maintaining the air at a near-constant temperature. The energy storage water injection network can consist of multiple branch pipes connecting the transfer water tank to each atomizing spray assembly, and those skilled in the art can install regulating valves on the branch pipes for control according to process requirements.

[0038] In addition, the gas storage tank and water storage tank are also independently equipped with pressure sensing components for real-time detection of the pressure inside the tank.

[0039] Furthermore, the regulating pump set includes a high-pressure pump assembly and a low-pressure pump assembly connected in parallel. During application, the air compressor injects high-pressure air into the air storage tank and water storage tank. Once the air in each sealed tank reaches a preset first pressure, the low-pressure pump assembly operates, injecting water into the water storage tank through the energy storage water injection pipe. The water compresses the air in the water storage tank into the air storage tank. When the pressure rises to a certain value, the low-pressure pump assembly is stopped, and the high-pressure pump assembly is restarted to continue injecting water into the water storage tank. When each water storage tank is full, the pressure in the air storage tank reaches a preset second pressure, and energy storage ends. The heat generated during air compression is exchanged with the water and the atomizing spray assembly, keeping the air at approximately a constant temperature. This invention does not specifically limit the first and second pressures; those skilled in the art can adjust them according to actual process requirements.

[0040] In some embodiments, the outer peripheral walls of the gas storage container and the water storage container are independently equipped with heat exchange components. These components utilize the heat generated by the compression of air during energy storage for heating or other purposes, or utilize the work done by the expansion of air during energy release for cooling, particularly in summer. The heat exchange components can also use an external heat source to heat or cool the compressed air inside the gas or water storage tank to achieve this work. This invention does not specifically limit the structure of the heat exchange components; those skilled in the art can select appropriate heat exchange components according to actual process requirements. For example, the heat exchange components can be a shell structure fitted onto the gas or water storage tank, a tubular structure spirally wound around the outer peripheral wall of the gas or water storage tank, or other structures commonly used in the art.

[0041] In some embodiments, the air compressor is connected to the air storage tank via a first air pipe, and the air storage tank is connected to the water storage tank via a second air pipe. During application, the air compressor starts working, supplying high-pressure gas to each air storage tank through the first air pipe. The high-pressure gas injected into the air storage tank then enters the water storage tank through the second air pipe, and stops injecting gas after reaching a preset pressure. Specifically, the air compressor includes an air compressor or a high-pressure blower.

[0042] It should be noted that the device system provided by this utility model has necessary connecting pipelines and switch control valves. This utility model does not make any special limitations on these. Those skilled in the art should reasonably adjust, add or delete them according to actual production needs. It should be clarified that new technical solutions generated by deleting some unnecessary connecting pipelines and switch control valves, or replacing single-function switch control valves with multi-function integrated control valves, or using external automatic control systems electrically connected to the switch control valves to control the opening of the corresponding valves, etc., which are common and well-known technical means by those skilled in the art, also fall within the scope of disclosure and protection of this utility model.

[0043] Example 1

[0044] This embodiment provides a hydraulic compressed air energy storage and power generation system, including an air energy storage module, a power generation module, and a transfer water tank 10. The air energy storage module includes an air compressor 1, an air storage container, and a water storage container. The air compressor 1 is an air compressor. Figure 1As shown, the gas storage container includes a gas storage tank 2, and the water storage container includes a first water storage tank 31, a second water storage tank 32, and a third water storage tank 33 arranged in parallel. The outer peripheral walls of the gas storage tank 2 and the water storage tank are respectively equipped with a first heat exchange component 4 and a second heat exchange component 5. The gas storage tank 2 is connected to an air compressor 1 via a first air pipe, and the bottom of the gas storage tank 2 is connected to the first water storage tank 31, the second water storage tank 32, and the third water storage tank 33 via a second air pipe. The gas storage tank 2 is connected to the first water storage tank 31, the second water storage tank 32, and the third water storage tank 33 via a gas expansion pipeline network, and a throttling device 9 is installed on the gas expansion pipeline network. The gas expansion pipeline network includes a first main pipe, a first expansion branch pipe, a second expansion branch pipe, and a third expansion branch pipe. One end of the first main pipe is connected to the top of the gas storage tank 2, and the other end is connected to the first, second, and third expansion branch pipes respectively. The first expansion branch pipe is connected to the top of the first water storage tank 31, the second expansion branch pipe is connected to the top of the second water storage tank 32, and the third expansion branch pipe is connected to the top of the third water storage tank 33. Each of the first, second, and third expansion branch pipes is equipped with a first regulating valve. Atomizing spray assembly 11 is installed at the bottom of the inner cavity of each of the first, second, and third water storage tanks 33. The atomizing spray assembly 11 is connected to the transfer water tank 10 via an energy storage water injection pipeline network. The energy storage water injection pipeline network includes a second main pipe, a first water injection branch pipe, a second water injection branch pipe, and a third water injection branch pipe. One end of the second main pipe is connected to the transfer water tank 10, and the other end is connected to the first, second, and third water injection branch pipes respectively. The second main pipe is equipped with a high-pressure pump assembly 12 and a low-pressure pump assembly 13 connected in parallel. The first water injection branch pipe is connected to the atomizing spray assembly 11 in the first water storage tank 31, the second water injection branch pipe is connected to the atomizing spray assembly 11 in the second water storage tank 32, and the third water injection branch pipe is connected to the atomizing spray assembly 11 in the third water storage tank 33. A second regulating valve is provided on the first, second, and third water injection branch pipes.

[0045] The power generation module includes a high-pressure hydroelectric generator 6, a low-pressure hydroelectric generator 7, and a frequency converter rectifier 8. One end of the high-pressure hydroelectric generator 6 is connected to the first water storage tank 31, the second water storage tank 32, and the third water storage tank 33 through the energy release water transmission network, and the other end is connected to the transfer water tank 10. The low-pressure hydroelectric generator 7 is connected in parallel with the high-pressure hydroelectric generator 6. The frequency converter rectifier 8 is electrically connected to the high-pressure hydroelectric generator 6 and the low-pressure hydroelectric generator 7 respectively. The energy-discharging water transmission network includes a third main pipe, a first water transmission branch pipe, a second water transmission branch pipe, and a third water transmission branch pipe. One end of the third main pipe is connected to the high-pressure hydroelectric generator 6, and the other end is connected to the first water transmission branch pipe, the second water transmission branch pipe, and the third water transmission branch pipe, respectively. The first water transmission branch pipe is connected to the bottom of the first water storage tank 31, the second water transmission branch pipe is connected to the bottom of the second water storage tank 32, and the third water transmission branch pipe is connected to the bottom of the third water storage tank 33. A third regulating valve is installed on the first water transmission branch pipe, the second water transmission branch pipe, and the third water transmission branch pipe.

[0046] The working principle of the hydraulic compressed air energy storage and power generation device system provided in this embodiment includes:

[0047] During energy storage, the air compressor 1 starts working, injecting high-pressure air into the air storage tank 2, the first water storage tank 31, the second water storage tank 32, and the third water storage tank 33, causing the air inside the tanks to reach the first pressure. The low-pressure pump assembly 13 is then activated, injecting water from the transfer water tank 10 into the first water storage tank 31, the second water storage tank 32, and the third water storage tank 33 respectively through the energy storage water injection network. This compresses the air into the air storage tank 2. When the pressure inside the tank rises to the second pressure, the low-pressure pump assembly 13 is deactivated, and the high-pressure pump assembly 12 is activated to continue injecting water into the water storage tanks. When the first water storage tank 31, the second water storage tank 32, and the third water storage tank 33 are full of water, the pressure inside the air storage tank 2 reaches the set value, completing the water injection energy storage. During this process, the heat generated by the air compression exchanges heat with the water in the atomizing spray assembly 11, keeping the air at a near-constant temperature.

[0048] During energy release, the compressed air in the air storage tank 2 expands, pushing the water in the water storage tank through the energy release water pipeline into the high-pressure hydroelectric power generation device 6, driving it to generate electricity. After the power is generated, the water flows into the transfer water tank 10. When the pressure inside the tank is lower than the first preset value, the high-pressure hydroelectric power generation device 6 stops, and the low-pressure hydroelectric power generation device 7 starts until the pressure drops to the second preset value, completing the energy release and power generation. During the energy release process, the air directly drives the water to have full contact and heat exchange, which is conducive to the constant temperature of the air during expansion, maintaining the expansion potential energy, and maintaining the system's high efficiency. By adjusting the throttling device 9, the water pressure entering the hydroelectric power generation device can be kept stable. The electricity generated by the power generation device is stabilized through the frequency converter rectifier 8.

[0049] This invention utilizes water as a carrier for compressing air and driving the power generation device to perform mechanical work. It also serves as a heat storage carrier during the air compression process to store energy and drive power generation, thus greatly improving energy conversion efficiency.

[0050] The applicant declares that the above description is only a specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model fall within the protection and disclosure scope of the present utility model.

Claims

1. A hydraulic compressed air energy storage and power generation system, characterized in that, It includes an air energy storage module, a power generation module, and a transfer water tank; the air energy storage module includes an air compressor, an air storage container, and a water storage container. The air compressor is connected to the air storage container and the water storage container respectively. The air storage container is connected to the water storage container through a gas expansion pipeline network. The water storage container is connected to the transfer water tank through an energy storage water injection pipeline network. A regulating pump set is installed on the energy storage water injection pipeline network. The power generation module includes a high-pressure hydroelectric power generation device, a low-pressure hydroelectric power generation device, and a frequency converter. One end of the high-pressure hydroelectric power generation device is connected to the water storage container through an energy release and water transmission pipeline network, and the other end is connected to the transfer water tank. The low-pressure hydroelectric power generation device is connected in parallel with the high-pressure hydroelectric power generation device. The frequency converter is electrically connected to both the high-pressure hydroelectric power generation device and the low-pressure hydroelectric power generation device.

2. The hydraulic compressed air energy storage and power generation system according to claim 1, characterized in that, The regulating pump set includes a high-pressure pump assembly and a low-pressure pump assembly arranged in parallel.

3. The hydraulic compressed air energy storage and power generation system according to claim 1 or 2, characterized in that, A throttling device is installed on the gas expansion pipeline.

4. The hydraulic compressed air energy storage and power generation system according to claim 1, characterized in that, The outer peripheral walls of the gas storage container and the water storage container are independently equipped with heat exchange components.

5. The hydraulic compressed air energy storage and power generation system according to claim 1, characterized in that, The gas storage container includes at least one gas storage tank, and the water storage container includes several water storage tanks arranged in parallel and / or in series.

6. The hydraulic compressed air energy storage and power generation system according to claim 5, characterized in that, The top of the water storage tank is connected to the gas expansion pipeline network, and the bottom of the water storage tank is connected to the energy release water delivery pipeline network.

7. The hydraulic compressed air energy storage and power generation system according to claim 5, characterized in that, The top of the inner cavity of the water storage tank is equipped with an atomizing spray assembly, which is connected to the energy storage water injection network.

8. The hydraulic compressed air energy storage and power generation system according to claim 5, characterized in that, The air compressor is connected to the air storage tank via a first air pipe, and the air storage tank is connected to the water storage tank via a second air pipe.

9. The hydraulic compressed air energy storage and power generation device system according to claim 1, characterized in that, The air compression device includes an air compressor or a high-pressure blower.

10. The hydraulic compressed air energy storage and power generation system according to claim 1, characterized in that, The gas expansion pipeline network, energy storage water injection pipeline network, and energy release water delivery pipeline network are each equipped with an independent regulating valve.

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