Pumped storage device and operating method thereof

Abstract

The present invention discloses a pumped-storage device and its operating method. The device consists of two sealed upper and lower tanks, a gravity vortex elimination rectifier plate, a movable pulley system, a hydro-turbine generator unit, a booster motor, a vacuum pressure pump and its frequency conversion system, a pressure PLC feedback system, and seamless high-pressure pipelines. A gravity vortex elimination rectifier plate A is provided in the upper tank, and a gravity vortex elimination rectifier plate B is provided in the lower tank. Gravity vortex elimination rectifier plate A is heavier than gravity vortex elimination rectifier plate B. During power generation, the water in the upper tank generates electricity through the hydro-turbine generator unit, while the vacuum pressure pump pumps air from the lower tank to the upper tank to maintain a high-pressure environment. During pumping operation, the water pump unit pumps water from the lower tank to the upper tank, and the gravity vortex elimination rectifier plate is returned to its original position by the booster motor and movable pulley system. The advantages of the present invention are: improved energy conversion efficiency, adaptability, flexibility, recovery effect, and environmental performance, and reduced maintenance cost and complexity.

Description

Technical Field

[0001] The present invention relates to the technical field of power and energy storage, and in particular to a small composite high-efficiency pumped storage device and a working method thereof. Background Art

[0002] In recent years, wind and solar power generation has steadily increased, and the installed capacity of renewable energy in the power system has continued to grow. To balance energy supply and demand and address temporal and spatial fluctuations in electricity demand, pumped storage projects have become a highly sought-after solution. In particular, the construction of medium- and large-scale pumped storage projects has been fully underway, and they are crucial for maintaining a balanced energy mix and the security of the power grid.

[0003] However, pumped storage projects are not suitable for flexible, on-the-go deployment due to their large scale, regional nature (the construction of medium- to large-scale pumped storage plants requires strict geographical conditions and initial and replenishment water sources), and transmission losses. Furthermore, some other chemical energy storage solutions may present environmental issues, such as battery recycling and waste disposal. Summary of the Invention

[0004] In response to the deficiencies of the prior art, the present invention provides a pumped storage device and its working method, which can arbitrarily increase or decrease the number of units according to the needs of the local power grid or individual needs to achieve the purpose of composite high-efficiency pumped storage. The high efficiency of this system is reflected in: the system uses a movable pulley system, gravity vortex elimination rectifier plates of varying weights, a straight tapered tailwater pipe turbine generator set with better energy recovery, a power-assisting motor, a vacuum pressure pump and its frequency conversion system, a pressure PLC feedback system, etc. to achieve efficient pumped storage in the system operation. The different energy storage liquids in the upper and lower tanks of this invention can also be replaced with different working fluids as needed to achieve more efficient energy storage. Because the system is closed, liquids of different densities or industrial use can also be used at the right time for the purpose of safety and efficiency.

[0005] In order to achieve the above object of the invention, the technical solution adopted by the present invention is as follows:

[0006] A pumped storage device includes: a sealed tank body 3, a movable pulley system 4, a gravity vortex elimination rectifier plate A1, a turbine support platform 5, a turbine generator unit 6, a booster motor, a vacuum pressure pump and its frequency conversion system 8, a pressure PLC feedback system 9, a seamless high-pressure air supply pipeline 10, a gravity vortex elimination rectifier plate B2, a water pumping pump group 11, and a seamless high-pressure water pumping pipeline 12.

[0007] The sealed tank body 3 is divided into an upper tank body and a lower tank body;

[0008] A movable pulley system 4 is installed at the top of the upper tank within the sealed tank 3. The pulley system connects gravity vortex elimination rectifier plates A1 and B2 to the power-assisted motor via steel or carbon fiber ropes. This system is used to achieve the vertical movement of gravity vortex elimination rectifier plates A1 and B2. Because the movable pulley system is more labor-saving, it can achieve unequal gravity between A1 and B2, saving energy consumption in the power-assisted motor and improving system efficiency.

[0009] The gravity vortex elimination rectifier A1 floats on the water surface in the upper tank body, supported by buoyancy, and exerts pressure on the water due to its own gravity. Rope holes and water pumping pipe holes are provided on the surface of the gravity vortex elimination rectifier A1.

[0010] The gravity vortex elimination rectifier B2 floats on the water surface in the lower tank body, exerting pressure on the water due to its own gravity, and is used for pumping conditions. A tailwater pipe hole is provided at the center of the surface of the gravity vortex elimination rectifier B2.

[0011] The gravity vortex elimination rectifier plate A1 is heavier than the gravity vortex elimination rectifier plate B2.

[0012] The turbine support platform 5 is used to support the turbine generator set 6 and is located below the water surface in the upper tank. The turbine generator set 6 is installed on the turbine support platform 5 and is driven by water flow to generate electricity.

[0013] The booster motor is installed on the side of the lower tank below the turbine support platform 5 to assist the rise of the gravity plate.

[0014] One end of the steel wire rope or carbon fiber rope is fixed on the surface of the gravity vortex elimination rectifier A1, and the other end passes through the gravity vortex elimination rectifier A1 and the turbine support platform 5 to connect to the power-boosting motor. The rope is then fixed to the upper surface of the gravity vortex elimination rectifier B2 through the power-boosting motor.

[0015] The vacuum pressure pump and its frequency conversion system 8 are arranged next to the sealed tank body 3, and are connected to the upper tank body and the lower tank body respectively through a seamless high-pressure gas supply pipeline 10, which is used to replenish the gas in the upper tank body or the lower tank body, and to maintain the high-pressure environment in the upper tank body to achieve dynamic balance of the system gas volume.

[0016] The pressure PLC feedback system 9 is used to monitor the pressure value in the lower tank in real time.

[0017] Seamless high-pressure air supply pipeline 10: connects the vacuum pressure pump and its frequency conversion system 8 with the upper tank body, and is used to replenish the gas in the upper tank body. The air supply volume and rate are obtained by PLC feedback information and are achieved by controlling the speed of the vacuum pressure pump.

[0018] A water pump assembly 11 is mounted at the bottom of the lower tank body and is used to pump water. A seamless high-pressure water pumping line 12 connects the water pump assembly 11 to the upper sealed tank body 3 and is used to pump water to the upper tank body. After entering the upper sealed tank body 3, the seamless high-pressure water pumping line 12 passes through the gravity vortex elimination rectifier A1 and delivers water to the bottom of the gravity vortex elimination rectifier A1.

[0019] Furthermore, the seamless high-pressure air supply pipeline 10 is divided into two paths. One end of the first path is connected to the upper position of the gravity vortex elimination rectifier A1 in the upper tank body, and the other end is connected to the upper position of the gravity vortex elimination rectifier B2 in the lower tank body. An air check valve 16 is provided in the middle of the first path;

[0020] The second circuit is connected in parallel with the first circuit, and the second circuit is sequentially provided with a vacuum pressure pump and its frequency conversion system 8, an air check valve 16 and a standby pressure-boosting pump 17. The standby pressure-boosting pump 17 supplies additional pressure to the upper tank body when the pressure is insufficient.

[0021] Furthermore, a system backup drain valve 13 is provided at the bottom of the sealed tank body 3 for use as a backup measure for drainage or maintenance.

[0022] Furthermore, a system backup vent valve 14 is provided on the top of the sealed tank body 3 for emergency removal of gas in the tank body to maintain system pressure balance safety and a safe pressure environment during maintenance.

[0023] Furthermore, a plurality of trapezoidal protrusions are arranged on the lower surfaces of the gravity vortex elimination rectifier plates A1 and B2 to prevent the generation of liquid surface vortexes during the water level drop, thereby ensuring the efficiency of the hydro-generator unit 6 and the system stability.

[0024] Furthermore, a straight conical tailwater pipe 15 is provided below the turbine, and the conical diffusion angle is between 7 degrees and 14 degrees. The straight conical tailwater pipe 15 collides with the tailwater pipe hole of the gravity vortex elimination rectifier B2. The gravity vortex elimination rectifier B2 contacts or cooperates with the hole of the straight conical tailwater pipe 15 during the up and down movement to ensure that the water level drops smoothly.

[0025] Furthermore, there are four power-assisting motors, which are fixed at four diagonal corners of the inner wall of the lower tank. Or a larger number of motors can be flexibly arranged according to the size and weight of the system.

[0026] The present invention also discloses a working method based on the above-mentioned pumped storage device, including: power generation working condition and pumping working condition;

[0027] The power generation operation includes the following steps:

[0028] Initial state: the upper tank body of the sealed tank body 3 is filled with water, and the gravity vortex elimination rectifier plate A1 floats on the water surface in the upper tank body due to buoyancy, generating pressure on the water due to its own gravity.

[0029] Through the movable pulley system 4 and the steel wire rope or carbon fiber rope, the gravity vortex elimination rectifier plate B2 in the lower tank body of the sealed tank body 3 is located at the bottom of the lower tank body.

[0030] Power generation start: Turn on the hydro-generator unit 6, the water in the upper tank body impacts the hydro-generator unit 6, and starts to generate electricity and output electrical energy to the outside.

[0031] Gas replenishment: close the air circuit and the air check valve 16, and open the vacuum pressure pump and its frequency conversion system 8 and the air check valve 16.

[0032] The vacuum pressure pump and its frequency conversion system 8 pump the air in the lower tank body and enter the upper tank body through the seamless high-pressure air supply pipeline 10.

[0033] The pressure PLC feedback system 9 monitors the pressure value in the lower tank in real time and dynamically adjusts the frequency conversion system of the vacuum pressure pump to maintain the dynamic balance of the gas volume and the high-pressure environment in the upper tank.

[0034] High pressure maintenance and pressure compensation: If the pressure in the upper tank is insufficient, the backup pressure compensation pump 17 will continue to compensate for the pressure.

[0035] The water level in the upper tank drops due to power generation, and the gravity vortex elimination rectifier A1 exerts additional pressure on the water due to gravity, compensating for the low power conversion efficiency caused by insufficient height difference.

[0036] System balance: During power generation, the check valve of the seamless high-pressure pumping pipeline 12 is closed and the pumping circuit is closed.

[0037] After the water flows into the lower tank, the exhausted gas enters the upper tank through the loop, achieving system pathway balance.

[0038] The pumping operation includes the following steps:

[0039] Initial state: The lower tank body of the sealed tank body 3 is filled with water. The gravity vortex elimination rectifier plate B2 floats on the water surface in the lower tank body due to buoyancy, generating pressure on the water due to its own gravity, thereby assisting the pumping process.

[0040] Pumping start: open the pumping pump group 11 and the check valve, and the water flows into the upper sealed tank body 3 through the seamless high-pressure pumping pipeline 12.

[0041] Open the air circuit and the air check valve 16 to allow the air in the upper tank to enter the lower tank through the circuit. Under the pumping condition, the turbine generator unit 6 is closed and the upper and lower tanks are partially isolated.

[0042] Power-assist motor operation: The weight of the gravity vortex elimination rectifier plate A1 is greater than that of the gravity vortex elimination rectifier plate B2, and the power-assist motor realizes the descent of the gravity vortex elimination rectifier plate B2 and the ascent of the gravity vortex elimination rectifier plate A1.

[0043] System balance: During the pumping process, the check valve of the seamless high-pressure air supply pipeline 10 is closed, and this circuit is closed.

[0044] Compared with the prior art, the advantages of the present invention are:

[0045] 1. Modular design: The present invention is based on a small composite pumped storage device, which can be flexibly combined according to installation requirements, adapted to different usage scenarios and power generation needs, and improve the adaptability and flexibility of the device.

[0046] 2. Efficient Energy Conversion: Two gravity plates of unequal weight are used, returned to their original position through a movable pulley system and a power-assisted motor, minimizing energy loss and improving system energy conversion efficiency. The gravity vortex-eliminating rectifier design effectively suppresses undesirable flow patterns and vortices generated during the liquid level drop, ensuring the efficiency of the turbine generator and pumping units, while reducing system vibration and adverse consequences.

[0047] 3. Optimized Design: The turbine tailwater pipe of the hydro-generator unit adopts a straight tapered design for better energy recovery. The cone diffusion angle ranges from 7 to 14 degrees, achieving optimal energy recovery. The seamless high-pressure pumping and air supply lines feature smooth transitions, avoiding hydraulic losses caused by right-angle bends and ensuring efficient operation.

[0048] 4. Intelligent Control: PLC programming intelligently controls the upper tank's pressure-replenishing flow rate, maintaining a stable high-pressure environment within the upper tank and providing optimal power generation conditions for the hydro-generator unit. The system is equipped with external power transmission transformers for convenient serial and grid-connected operation.

[0049] 5. Efficient operation and maintenance: The modular concept of the system embodies high efficiency and ease of operation, facilitates system operation and maintenance, and reduces maintenance costs and complexity.

[0050] 6. Environmentally friendly: Compared with other chemical energy storage methods, the pumped storage device of the present invention avoids environmental problems and has higher environmental performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 1 is a schematic structural diagram of a pumped storage device according to an embodiment of the present invention;

[0052] Figure 2 1 is a schematic structural diagram of a gravity vortex elimination rectifier plate A according to an embodiment of the present invention;

[0053] Figure 3 It is a structural schematic diagram of the gravity vortex elimination rectifier plate B according to an embodiment of the present invention. DETAILED DESCRIPTION

[0054] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and examples.

[0055] like Figure 1 The pumped storage device shown includes: a sealed tank body 3, a movable pulley system 4, a gravity vortex elimination rectifier plate A1, a turbine support platform 5, a turbine generator unit 6, a booster motor, a vacuum pressure pump and its frequency conversion system 8, a pressure PLC feedback system 9, a seamless high-pressure air supply pipeline 10, a gravity vortex elimination rectifier plate B2, a water pump unit 11, and a seamless high-pressure water pumping pipeline 12.

[0056] The sealed tank body 3 is divided into an upper tank body and a lower tank body;

[0057] The movable pulley system 4 is arranged at the top of the upper tank body inside the sealed tank body 3. The pulley system connects the gravity vortex elimination rectifier plate A1, the gravity vortex elimination rectifier plate B2 and the power-assisting motor through a steel wire rope or a carbon fiber rope. The movable pulley system 4 is used to realize the up and down movement of the gravity vortex elimination rectifier plate A1 and the gravity vortex elimination rectifier plate B2.

[0058] like Figure 2 As shown, the gravity vortex elimination rectifier A1 floats on the water surface in the upper tank body, supported by buoyancy, and exerts pressure on the water due to its own gravity. Rope holes and water pumping pipe holes are provided on the surface of the gravity vortex elimination rectifier A1.

[0059] like Figure 3 As shown, the gravity vortex elimination rectifier B2 floats on the water surface in the lower tank body, exerts pressure on the water due to its own gravity, and is used for pumping conditions. A tailwater pipe hole is provided in the center of the surface of the gravity vortex elimination rectifier B2.

[0060] The turbine support platform 5 is used to support the turbine generator set 6 and is located below the water surface in the upper tank. The turbine generator set 6 is installed on the turbine support platform 5 and is driven by water flow to generate electricity.

[0061] The booster motor is installed on the side of the lower tank below the turbine support platform 5 to assist the rise of the gravity plate.

[0062] One end of the steel wire rope or carbon fiber rope is fixed on the surface of the gravity vortex elimination rectifier A1, and the other end passes through the gravity vortex elimination rectifier A1 and the turbine support platform 5 to connect to the power-boosting motor. The rope is then fixed to the upper surface of the gravity vortex elimination rectifier B2 through the power-boosting motor.

[0063] The vacuum pressure pump and its frequency conversion system 8 are arranged next to the sealed tank body 3, and are connected to the upper tank body and the lower tank body respectively through a seamless high-pressure gas supply pipeline 10, which is used to replenish the gas in the upper tank body or the lower tank body, and to maintain the high-pressure environment in the upper tank body to achieve dynamic balance of the system gas volume.

[0064] The pressure PLC feedback system 9 is used to monitor the pressure value in the lower tank.

[0065] Seamless high-pressure gas supply pipeline 10: connects the vacuum pressure pump and its frequency conversion system 8 with the upper tank body, and is used to supplement the gas in the upper tank body.

[0066] A water pump assembly 11 is mounted at the bottom of the lower tank body and is used to pump water. A seamless high-pressure water pumping line 12 connects the water pump assembly 11 to the upper sealed tank body 3 and is used to pump water to the upper tank body. After entering the upper sealed tank body 3, the seamless high-pressure water pumping line 12 passes through the gravity vortex elimination rectifier A1 and delivers water to the bottom of the gravity vortex elimination rectifier A1.

[0067] System Operation: During power generation, the upper portion of sealed tank 3 is filled with water. Buoyancy forces gravity vortex elimination rectifier A1 to the surface of the water within the upper portion, exerting pressure on the water due to its own gravity. Using movable pulley system 4 and a connected steel wire rope (charcoal fiber rope), gravity vortex elimination rectifier B2, located within the lower portion of sealed tank 3, is positioned at the bottom of the lower portion. When hydro-generator unit 6 is activated, the water within the upper portion impacts the hydro-generator unit 6, generating electricity and simultaneously outputting the electrical energy. At this time, the air circuit and the check valve 2 are closed, and the medium vacuum pressure pump and its frequency conversion system 8, and the air check valve 16 are opened to pump the air in the lower tank into the upper tank through the seamless high-pressure air supply pipeline 10. During this process, the pressure value in the lower tank is monitored in real time by the pressure PLC feedback system 9. The vacuum pressure pump and its frequency conversion system 8 are dynamically adjusted according to this value, and then the speed of the vacuum pressure pump is adjusted to achieve dynamic balance of the volume of gas pumped in the lower tank, thereby reducing the pressure in the upper tank caused by the outflow of water. At the same time, the gas pumped by the vacuum pressure pump maintains the high-pressure environment in the upper tank. This high-pressure environment compensates for the low power conversion efficiency caused by the insufficient height difference between the upper and lower tanks due to the insufficient system height. If insufficient pressure occurs during this process, the standby pressure pump 17 can continue to supply sufficient pressure to the upper tank. On the other hand, as the water level in the upper tank drops, gravity-induced pressure is applied to the water inside the upper tank by the force of gravity. This further compensates for the low energy conversion efficiency caused by the insufficient height difference between the upper and lower tanks, creating a greater potential energy difference between the upper and lower tanks and increasing power generation. Furthermore, the lower surface of the gravity-induced pressure-eliminating ...

[0068] The gas discharged from the lower tank after the water flows into it enters the upper tank through this loop, thus achieving system pathway balance.

[0069] The system works in the pumping condition: At this time, the lower tank body of the sealed tank body 3 is filled with water, and the gravity vortex elimination rectifier plate B2 floats on the water surface in the lower tank body due to the buoyancy, exerting a pressure effect on the water due to its own gravity, which helps the water pump unit to pump water efficiently during the pumping process. At the same time, a hole is opened in the middle of the gravity vortex elimination plate 2 to prevent it from colliding with the straight tapered tailwater pipe of the turbine during its up and down movement. During the pumping process, the water pump unit and the check valve are turned on, and the water flows into the upper sealed tank body 3 through the seamless high-pressure pumping pipeline 12 due to the pumping action of the water pump unit. At the same time, the air circuit and the check valve are opened to allow the air in the upper tank body to pass through this circuit into the lower tank body (in the pumping condition, the turbine generator unit is shut down, and the upper and lower tank bodies are partially isolated). During this process, because gravity vortex elimination rectifier plate A1 is designed to weigh more than gravity vortex elimination rectifier plate B2, a number of booster motors, equal to the number of steel cables (or carbon fibers), are installed near the lower surface of the turbine support platform 5 to achieve the process of gravity vortex elimination plate 2 descending and gravity vortex elimination plate 1 ascending. Furthermore, due to the use of a labor-saving movable pulley system 4, this process reduces the energy consumption of the booster motor (the booster motor is only required during pumping operation; during power generation, gravity plate 1 weighs more than gravity plate 2), further improving the system's energy storage efficiency. Furthermore, to prevent the water level in the lower tank from dropping, which could deteriorate the inflow conditions of the pumping unit, several linearly distributed trapezoidal protrusions are arranged on the lower surface of gravity vortex elimination rectifier plate B2. These prevent the liquid surface vortices generated during the water level drop from being drawn into the pumping unit, which could result in reduced pumping unit efficiency and system vibration. Furthermore, due to its flat plate effect, gravity vortex elimination rectifier plate B2 allows the water level to descend steadily, ensuring smooth and safe operation of the entire system. During the pumping process, the check valve of the seamless high-pressure air supply pipeline 10 is closed and this circuit is closed.

[0070] System high efficiency features and advantages:

[0071] Gravity plates: Two unequally weighted gravity plates are used, with rectifier plate 1 weighing more than gravity vortex-eliminating rectifier plate B2. This increases the energy of the upper tank water during power generation, further boosting the power generation capacity. A movable pulley system 4 and a power-assisted motor simultaneously return the two unequally weighted gravity plates to their original positions, minimizing energy loss during the return process and improving the system's energy conversion efficiency.

[0072] Vortex elimination and rectifying plates: They prevent the generation of adverse flow patterns and vortices during the lowering of the water level in the upper and lower tanks, which in turn cause adverse consequences such as reduced efficiency and unit vibration on the turbine generator set and the water pump set, affecting the operating efficiency and safety of the entire system.

[0073] The tailwater pipe of the turbine of the hydro-generator unit adopts a straight tapered pipe. In actual engineering, in order to avoid a large excavation depth, an elbow-shaped tailwater pipe is used. The present invention adopts a tailwater pipe with a tailwater solution design, which can adopt a straight tapered tailwater pipe with better energy recovery effect than the elbow-shaped tailwater pipe. The cone diffusion angle is between 7 degrees and 14 degrees, which can achieve the purpose of optimal energy recovery.

[0074] The bends in the seamless high-pressure water pumping pipeline 12 require smooth transitions to avoid right-angle bends that would cause significant hydraulic losses and reduce the hydraulic efficiency of the entire system. The seamless high-pressure air supply pipeline 10 adopts the same design principles. The seamless pipeline is designed to prevent water and air pressure leakage in these high-pressure water pumping and air supply pipelines.

[0075] Backup air valves and backup drain valves are backup measures for system maintenance or timely shutdown. The system's turbine generator units and pump units should be optimized with background knowledge in hydraulic machinery, fluid mechanics, and related fields to ensure the highest energy conversion efficiency of the entire system.

[0076] It is recommended to use a mixed flow turbine generator set and a centrifugal single-stage pump. If the flow rate and the system tank radius cannot meet the needs of a mixed flow turbine generator set and a centrifugal single-stage pump set, an impact turbine generator set and a multi-stage centrifugal pump set can also be selected. In this case, the system efficiency is not the highest.

[0077] The energy storage liquid in this system can also be replaced with energy storage liquids of different densities as needed to achieve more efficient energy storage. Because the system is closed, liquids of different densities or industrial use can also be used at the right time for the purpose of safety and efficiency.

[0078] Those skilled in the art will appreciate that the embodiments described herein are intended to help readers understand the implementation methods of the present invention, and it should be understood that the scope of protection of the present invention is not limited to such specific descriptions and embodiments. Those skilled in the art can make various other specific variations and combinations based on the technical teachings disclosed in the present invention without departing from the essence of the present invention, and such variations and combinations are still within the scope of protection of the present invention.

Claims

1. A pumped storage device, characterized in that: include: Sealed tank (3), movable pulley system (4), gravity vortex elimination rectifier plate A (1), turbine support platform (5), turbine generator set (6), booster motor, vacuum pressure pump and frequency conversion system (8), pressure PLC feedback system (9), seamless high-pressure air supply pipeline (10), gravity vortex elimination rectifier plate B (2), water pumping pump set (11), seamless high-pressure water pumping pipeline (12); The sealed tank body (3) is divided into an upper tank body and a lower tank body; The movable pulley system (4) is arranged on the top of the upper tank body in the sealed tank body (3), and the pulley system is connected to the gravity vortex elimination rectifier plate A (1), the gravity vortex elimination rectifier plate B (2) and the power-assisting motor through a steel wire rope or a carbon fiber rope. The movable pulley system (4) is used to realize the up and down movement of the gravity vortex elimination rectifier plate A (1) and the gravity vortex elimination rectifier plate B (2); The gravity vortex elimination rectifier plate A (1) floats on the water surface in the upper tank body and is supported by buoyancy, exerting pressure on the water due to its own gravity. A rope hole and a water pumping pipe hole are provided on the surface of the gravity vortex elimination rectifier plate A (1); The gravity vortex elimination rectifier plate B (2) floats on the water surface in the lower tank body and exerts pressure on the water due to its own gravity. It is used for pumping operation. A tailwater pipe hole is provided at the center of the surface of the gravity vortex elimination rectifier plate B (2); The gravity vortex elimination rectifier plate A (1) is heavier than the gravity vortex elimination rectifier plate B (2); The turbine support platform (5) is used to support the turbine generator set (6) and is located below the water surface in the upper tank body; the turbine generator set (6) is installed on the turbine support platform (5) and is driven by water flow to generate electricity; The booster motor is installed on the side of the lower tank below the turbine support platform (5) to assist the rise of the gravity plate; One end of the steel wire rope or carbon fiber rope is fixed to the surface of the gravity vortex elimination rectifier plate A (1), and the other end passes through the gravity vortex elimination rectifier plate A (1) and the turbine support platform (5) to connect to the booster motor, and the rope is fixed to the upper surface of the gravity vortex elimination rectifier plate B (2) through the booster motor; The vacuum pressure pump and its frequency conversion system (8) are arranged beside the sealed tank body (3), and are respectively connected to the upper tank body and the lower tank body through a seamless high-pressure gas supply pipeline (10), and are used to replenish the gas in the upper tank body or the lower tank body, and to maintain the high-pressure environment in the upper tank body, so as to achieve a dynamic balance of the gas volume of the system; The pressure PLC feedback system (9) is used to monitor the pressure value in the lower tank in real time; The water pumping unit (11) is installed at the bottom of the lower tank body and is used for pumping water; the seamless high-pressure water pumping pipe (12) connects the water pumping unit (11) and the upper sealed tank body (3) and is used for pumping water to the upper tank body. After entering the upper sealed tank body (3), the seamless high-pressure water pumping pipe (12) passes through the gravity vortex elimination rectifier plate A (1) and sends the water to the bottom of the gravity vortex elimination rectifier plate A (1).

2. A pumped storage device according to claim 1, characterized in that: The seamless high-pressure air supply pipeline (10) is divided into two paths, one end of the first path is connected to the upper position of the gravity vortex elimination rectifier plate A (1) in the upper tank body, and the other end is connected to the upper position of the gravity vortex elimination rectifier plate B (2) in the lower tank body; an air check valve (16) is provided in the middle of the first path; The second route is connected in parallel with the first route, and a vacuum pressure pump and its frequency conversion system (8), an air check valve (16) and a spare pressure-boosting pump (17) are sequentially arranged in the second route; the spare pressure-boosting pump (17) supplies additional pressure to the upper tank body when the pressure is insufficient.

3. The pumped storage device according to claim 1, characterized in that: A system backup drain valve (13) is provided at the bottom of the sealed tank body (3) for use as a backup measure during drainage or maintenance.

4. The pumped storage device according to claim 1, characterized in that: A system standby vent valve (14) is provided on the top of the sealed tank body (3) for discharging gas in the tank body and maintaining system pressure balance.

5. The pumped storage device according to claim 1, characterized in that: A plurality of trapezoidal protrusions are arranged on the lower surfaces of the gravity vortex elimination rectifier plate A (1) and the gravity vortex elimination rectifier plate B (2) to prevent the generation of liquid surface vortexes during the water level drop, thereby ensuring the efficiency of the hydro-generator unit (6) and the system stability.

6. The pumped storage device according to claim 1, characterized in that: A straight tapered tailwater pipe (15) is provided below the turbine, and the tapered diffusion angle is between 7 degrees and 14 degrees. The straight tapered tailwater pipe (15) collides with the tailwater pipe hole of the gravity vortex elimination rectifier B (2). The gravity vortex elimination rectifier B (2) contacts or cooperates with the hole of the straight tapered tailwater pipe (15) during the upward and downward movement, thereby ensuring that the water level drops steadily.

7. The pumped storage device according to claim 1, characterized in that: There are four power-assisting motors, which are respectively fixed on four diagonal corners of the inner wall of the lower tank body.

8. An operating method of the pumped storage device according to any one of claims 1 to 7, comprising: Power generation conditions and pumping conditions; The power generation operation includes the following steps: Initial state: the upper tank body of the sealed tank body (3) is filled with water, and the gravity vortex elimination rectifier plate A (1) floats on the water surface in the upper tank body due to buoyancy, generating pressure on the water due to its own gravity; The gravity vortex elimination rectifier plate B (2) in the lower tank body of the sealed tank body (3) is located at the bottom of the lower tank body through a movable pulley system (4) and a steel wire rope or a carbon fiber rope; Power generation start: the hydro-generator unit (6) is turned on, and the water in the upper tank body impacts the hydro-generator unit (6), starting to generate electricity and output electrical energy to the outside; Gas replenishment: close the air circuit and the air check valve (16), and start the vacuum pressure pump and its frequency conversion system (8) and the air check valve (16); The vacuum pressure pump and its frequency conversion system (8) pump the air in the lower tank body and enter the upper tank body through the seamless high-pressure air supply pipeline (10); The pressure PLC feedback system (9) monitors the pressure value in the lower tank in real time and dynamically adjusts the frequency conversion system of the vacuum pressure pump to maintain the dynamic balance of the gas volume and the high-pressure environment in the upper tank; High pressure maintenance and pressure compensation: If the pressure in the upper tank is insufficient, the backup pressure compensation pump (17) will continue to compensate for the pressure; The water level in the upper tank drops due to power generation, and the gravity vortex elimination rectifier A (1) exerts additional pressure on the water due to gravity, compensating for the low power conversion efficiency caused by insufficient height difference; System balance: During power generation, the check valve of the seamless high-pressure pumping pipeline (12) is closed, and the pumping circuit is closed; After the water flows into the lower tank, the exhausted gas enters the upper tank through the loop, achieving system pathway balance; The pumping operation includes the following steps: Initial state: The lower tank body of the sealed tank body (3) is filled with water, and the gravity vortex elimination rectifier plate B (2) floats on the water surface in the lower tank body due to buoyancy, generating pressure on the water due to its own gravity, thereby assisting the pumping process; Pumping start: open the pumping pump unit (11) and the check valve, and the water flows into the upper sealed tank (3) through the seamless high-pressure pumping pipe (12); Open the air circuit and the air check valve (16) to allow the air in the upper tank to enter the lower tank through the circuit. The turbine generator unit (6) is closed under the pumping condition, and the upper and lower tanks are partially isolated. The power-assist motor operates: the weight of the gravity vortex elimination rectifier plate A (1) is greater than that of the gravity vortex elimination rectifier plate B (2), and the power-assist motor causes the gravity vortex elimination rectifier plate B (2) to descend and the gravity vortex elimination rectifier plate A (1) to ascend; System balance: During the pumping process, the check valve of the seamless high-pressure air supply pipeline (10) is closed, and this circuit is closed.

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