Rail-mounted rotating paddle wing caisson energy storage power generation system and control method

Abstract

This invention provides a track-mounted rotating propeller caisson energy storage and power generation system and its control method. A cylindrical caisson is anchored within the seabed. The system utilizes the process of water intake during pump / turbine power generation and water drainage during energy storage. The water flow is constrained by a guide pipe. Simultaneously, the hydrophobic material treatment on the inner wall of the cylindrical caisson allows for efficient water rotation, generating angular kinetic energy. This drives a propeller blade coaxial with the cylindrical caisson, or a foldable blade, similar to a wind turbine, where the water rotation generates electricity. This reuses the kinetic energy that was not utilized during turbine power generation and pump drainage, improving the efficiency of the caisson energy storage and power generation system. This invention allows the caisson energy storage to further generate electricity from the generator on top of turbine power generation, thereby increasing the efficiency of the caisson energy storage system and its power density. The system also considers structural support for the cylindrical caisson, utilizing structural support units to support the caisson dome.

Description

Technical Field

[0001] This invention belongs to the field of energy storage, and specifically relates to a track-mounted rotary propeller caisson energy storage and power generation system and its control method. Background Technology

[0002] With the rapid development of offshore wind power, various industries relying on the marine environment or utilizing the characteristics of seawater, in addition to electricity demand, are advancing rapidly. These include offshore energy islands, underwater data centers, underwater converter stations, offshore oil and gas platforms, and marine pollution control, all of which require wind power. However, the uncertainty and instability of wind power generation are hindering the rapid development of these industries. It is necessary to rely on existing mature technologies on land, such as frequency regulation and peak shaving thermal power, compressed air energy storage, chemical energy storage, and pumped storage power stations, to ensure grid stability. Pumped storage is characterized by high power output and long discharge time, with an efficiency between 60% and 70%, including pumping efficiency, power generation efficiency, and residual evaporation. Pumped storage power stations are important regulating tools for the power system, offering advantages such as flexible start-up and fast regulation speed. They are technologically mature, reliable, and relatively economical peak-shaving and energy storage power sources, but they have specific geological environmental requirements.

[0003] Carbon emissions from thermal power plants that regulate frequency and peak loads remain a problem, while the small capacity of compressed air energy storage and chemical energy storage cannot meet the requirements for supporting existing wind power.

[0004] A method similar to pumped-storage hydroelectric power, known as "underwater caisson drainage energy storage," utilizes surplus electricity generated from renewable energy sources that cannot be transmitted externally to drain water from an underwater caisson. When power is needed, the water pressure drives a turbine generator on the caisson to generate electricity. It is the reverse process of pumped-storage hydroelectric power. It offers advantages such as not occupying land area, no water loss due to evaporation, large capacity, and no need for pumped-storage reservoirs. Furthermore, it allows for the allocation of capacity based on the marine environment or the characteristics of seawater to provide stable power supply locally, significantly reducing line losses, while also providing a stable power source for offshore wind power grid connection. Simultaneously, it drives innovation and development in related industries, such as water management (floating debris removal, etc.), seawater desalination, large-scale cooling, offshore platforms, underwater oil pipeline heating and pressurization, underwater data centers, and underwater converter stations.

[0005] Given that underwater caisson-based energy storage has a 100-year lifespan, issues such as corrosion prevention, biological parasitism, buoyancy, stability, and manufacturing costs must be considered. If 30% of the 70% system conversion efficiency of underwater caisson-based energy storage is not utilized, further improving the power generation efficiency of underwater caisson-based energy storage is crucial. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention proposes a track-mounted rotating propeller caisson energy storage and power generation system and its control method. It utilizes the process of water intake during pump / turbine power generation and water drainage during energy storage within the caisson, fully reusing the unused kinetic energy generated by the pump / turbine energy storage. By constraining the inlet and outlet water flow of the pump / turbine, angular kinetic energy is generated by water rotation, causing the water within the cylindrical caisson to rotate. Simultaneously, the use of superhydrophobic materials achieves corrosion prevention and overcomes aquatic organism parasitism, while also reducing the viscous force of the rotating water on the bottom and walls of the cylindrical caisson, thereby improving the stability of the caisson and the energy storage output power density.

[0007] The principle of this invention is as follows: A cylindrical caisson is anchored to or embedded in the seabed. The potential energy of the water head is used to drive a turbine to generate electricity by pumping water into the caisson. Excess electricity is also used to power the pump to drain the water from the caisson, storing energy during this process. Because the water inside and outside the cylindrical caisson is separated, the water flow is constrained by the inlet and outlet pipes of the pump / turbine. Simultaneously, the smooth circular structure of the inner wall of the cylindrical caisson allows for efficient rotation of the water flow, generating angular kinetic energy. For example, by adding a horizontal impeller coaxial with the water rotation at the bottom of the caisson, the kinetic energy generated by the water rotation, similar to a wind turbine, drives electricity generation. This reuses the kinetic energy not previously utilized during the turbine's water intake and pump's drainage, improving the efficiency of the caisson's energy storage and power generation system.

[0008] Because the gas inside the caisson is compressed into an air bladder in the same water area with minimal loss during the water intake and energy storage process, the compressed gas is released during the drainage process to help the water pump drain water, while at the same time providing constant temperature and humidity gas inside the cylindrical caisson, ensuring the long service life of the caisson structure.

[0009] Considering that the cylindrical caisson is placed on the bottom of the water, buoyancy and water flow have a great impact on the structural stability of the cylindrical caisson. Therefore, based on the principle of suction anchor, the cylindrical caisson is embedded in the silt at the bottom of the water. At the same time, based on the principle of gyro-axis stabilization, the rotation of the water inside the cylindrical caisson is used to further ensure the stability of the cylindrical caisson.

[0010] Among them, based on the rotational kinetic energy formula ,in, For the quality of water, Let be the angular velocity of the water body's rotation. The rotational kinetic energy of the water body. Let ω be the moment of inertia of the water body, and r be the perpendicular distance between the mass and the center of the cylindrical caisson. The angular velocity of the water body due to the viscosity of the water is... This reduces the rotational kinetic energy of the water body. Simultaneously considering the corrosion prevention and aquatic organism parasitism issues of cylindrical caissons, and fully utilizing the corrosion-preventing and water viscosity-reducing properties of hydrophobic materials, the surface treatment of cylindrical caissons is carried out using hydrophobic materials, which overcomes the rotational kinetic energy of the water body. This not only avoids losses but also solves the problems of corrosion prevention and aquatic organism parasitism, achieving high-efficiency wind turbine power generation and flywheel energy storage. By rotating the water body to drive the impeller to generate electricity, it can quickly support the power grid in the event of insufficient new energy generation. This effective acquisition of kinetic energy increases the power density of the caisson energy storage.

[0011] To achieve the above objectives, the present invention adopts the following technical solution: A track-mounted rotary propeller caisson energy storage and power generation system includes a cylindrical caisson unit, a structural support unit, a track-mounted rotary propeller unit, an energy storage and power generation unit, caisson inlet and outlet pipes, and a compressed gas unit. The structural support unit, the track-mounted rotary propeller unit, and the energy storage and power generation unit are located inside the cylindrical caisson unit, while the compressed gas unit is located outside the cylindrical caisson unit and is anchored to the top of the cylindrical caisson unit based on the minimum head depth or the water body where the cylindrical caisson unit is located. The structural support unit is located at the center of the cylindrical caisson unit, passes through the caisson dome and connects to the caisson dome, and provides support for the caisson dome; the caisson's air intake and exhaust pipes are attached to the inner wall of the structural support unit; the track-type rotating propeller unit is installed in the inner wall area of ​​the cylindrical caisson body near the cylindrical caisson unit, and is slidably connected by the upper chain track fixed to the caisson dome of the cylindrical caisson unit and the lower chain track at the bottom of the caisson. The cylindrical caisson unit is a cylindrical tank structure, including a cylindrical caisson body, an upper caisson dome, and a multi-chamber suction anchor structure at the bottom of the caisson. The multi-chamber suction anchor structure is integrally manufactured and connected to the bottom of the cylindrical caisson unit. The multi-chamber suction anchor structure is embedded in the silt layer at the bottom of the water body, and anchors the cylindrical caisson unit to the bottom of the water body based on the suction anchor principle. The caisson dome is structurally supported by a structural support unit that is vertically placed at the center of the multi-chamber suction anchor structure. The energy storage power generation unit includes an integrated motor / generator and an integrated water pump / turbine; The integrated pump / turbine unit is installed inside the pump / turbine nacelle. Furthermore, the structural support unit includes an energy storage power generation inlet and outlet channel, an energy storage power generation inlet and outlet, an annular cylindrical isolation chamber, and a water pump / turbine chamber; The structural support unit is a cylindrical structure, manufactured as a single unit. From top to bottom, it consists of an energy storage power generation inlet and outlet channel, an annular cylindrical isolation chamber, and a water pump / turbine chamber. The energy storage power generation caisson inlet and outlet pipe runs through the entire structural support unit from top to bottom and is connected to the water pump / turbine inlet and outlet of the energy storage power generation unit in the water pump / turbine chamber. The water pump / turbine nacelle at the bottom of the structural support unit is installed at the center of the caisson bottom; The annular cylindrical isolation chamber is installed vertically and vertically with the pump / turbine nacelle, and is sealed and independent of each other. The inner ring of the annular cylindrical isolation chamber is the energy storage and power generation inlet and outlet channel, and an inner ring sealing door is installed on the inner ring wall and an outer ring sealing door is installed on the outer ring wall. A pump / turbine sealing door is installed between the bottom of the annular cylindrical isolation chamber and the top of the pump / turbine nacelle.

[0012] Furthermore, the caisson's air intake and exhaust pipes are attached to the inner pipe wall of the structural support unit. The caisson's air intake and exhaust pipes are equipped with five air intake and exhaust branch pipes and valves, namely, atmospheric air intake and exhaust branch pipes and valves, annular cylindrical isolation chamber air intake and exhaust branch pipes and valves, water pump / turbine nacelle air intake and exhaust branch pipes and valves, cylindrical caisson body air intake and exhaust branch pipes and valves, and compressed gas unit air intake and exhaust branch pipes and valves. The intake and exhaust branch pipes and valves of the cylindrical caisson body pass through the dome of the caisson body and are connected to the internal gas of the cylindrical caisson body. The gas in and out of the cylindrical caisson body is controlled by the electrically controlled valves.

[0013] Furthermore, an integrated pump / turbine unit is installed inside the pump / turbine nacelle. The inlet of the turbine and the outlet of the pump are the same pump / turbine inlet / outlet, which is connected to the energy storage power generation inlet / outlet channel. The outlet of the turbine is connected to the interior of the cylindrical caisson through a turbine guide pipe passing through the pump / turbine nacelle. The inlet of the pump is connected to the interior of the cylindrical caisson through a pump guide pipe passing through the pump / turbine nacelle. The turbine guide pipe and the pump guide pipe are horizontally placed along the outer circumference of the pump / turbine nacelle. A turbine guide check valve is embedded in the turbine guide pipe, and a pump guide check valve is embedded in the pump guide pipe. The outlets of the turbine guide pipe and the pump guide pipe are on the same radius circle and face the same direction.

[0014] Furthermore, the track-type rotating propeller unit includes an upper chain track, a lower chain track, several propellers, and a ring chain; The upper and lower chain tracks are concentric circular tracks of a cylindrical caisson body, with annular chains embedded within them. The upper chain track is fixedly installed on the dome of the cylindrical caisson body, while the lower chain track is fixedly installed on the bottom of the caisson. The annular chain inside the upper chain track is connected to a transmission gear, which is connected to the motor / generator of the energy storage and power generation unit via a transmission shaft passing through the dome of the caisson. Several propeller blades are installed at equal intervals between the upper and lower chain tracks; the propeller blades consist of blades and blades, with the blades fixedly installed on one side of the semi-cylindrical blade plane, and the two ends of the blades fixedly connected to the inner ring chains of the upper and lower chain tracks respectively.

[0015] Furthermore, the compressed gas unit includes an air bladder and an air bladder inlet and outlet pipe; Based on the minimum water head height or the top depth of the cylindrical caisson, the airbag uses the cylindrical caisson as an anchor pile to anchor it in the top or surrounding water of the cylindrical caisson. The airbag is connected to the caisson's airbag intake and exhaust pipes through the airbag intake and exhaust pipes and the compressed gas unit intake and exhaust branch pipes, which controls the compressed gas entering and exiting the airbag.

[0016] Furthermore, the rotor blade is foldable and includes a sub-blade unit, a blade slide frame, and a blade frame; The sub-blade unit consists of several sub-blades and a traction buoy. The sub-blades are horizontal rectangular structures. A pivot is installed at 1 / 2 of the height of each side of the horizontal rectangular structure. Two hinges are fixedly placed on each of the two horizontal long sides of the horizontal rectangular structure. Each sub-blade is connected to the others by the hinges. Among them, the uppermost terminal blade and the lowermost terminal blade are 1 / 2 height sub-blades. The two ends of the 1 / 2 height sub-blades are not installed with shafts. The 1 / 2 height sub-blades are also fixed with two hinges on each of the two long sides. The upper end of the uppermost 1 / 2 height sub-blade is connected to the lower part of the traction buoy by a hinge, and the lower end of the 1 / 2 height sub-blade is connected to the lower end of the uppermost sub-blade by a hinge. The upper end of the bottom 1 / 2 height sub-blade is connected to the lower end of the next bottom sub-blade by a hinge, and the lower end of the 1 / 2 height sub-blade is connected to the lower edge of the blade slide frame by a hinge. The traction buoy is an inverted cylindrical sealed structure. To resist the gas pressure inside the cylindrical caisson, it is filled with gas at a certain pressure. The axial length of the traction buoy is the same as the width of the sub-blades. The axial center of the traction buoy is respectively equipped with the rotating shafts of the concentric sub-blades. The upper end of the 1 / 2-high blade is connected to the lower end of the traction buoy via a hinge.

[0017] Furthermore, the blade slide rail frame is a vertical rectangular frame, with two vertical side frames serving as sliding tracks for the traction buoy and sub-blades to move up and down. The height inside the blade slide rail frame is the longitudinal unfolded height of the sub-blade unit, and the width inside the frame is the same as the width of the sub-blade. The traction buoy in the sub-blade unit is at the top and is embedded into the sliding track of the blade slide rail frame along with each sub-blade via a pivot. After being folded, the sub-blade unit is placed horizontally on the bottom side of the blade slide rail frame.

[0018] Furthermore, a blade rib is installed at the center of the upper and lower frames of the blade slide frame and is fixedly connected to the annular chain inside the upper and lower chain tracks. The movement of several foldable blades is based on fluid dynamics and takes into account the generation of turbulent disturbances. The distance between the foldable blades is optimized and they are installed at equal intervals between the upper and lower chain tracks. The foldable blades are composed of sub-blades and blade ribs. The structure of the sub-blades is designed based on hydrodynamics. Since the hollow air-filled structure of the traction buoy has a certain buoyancy, the friction of the foldable blades on the lower chain track is reduced. The two ends of the blade rib are fixedly connected to the inner annular chain of the upper and lower chain tracks, respectively.

[0019] The present invention also provides a control method for a track-mounted rotary propeller caisson energy storage and power generation system, comprising the following steps: Step 1: In power generation mode, perform the following steps: Step 1.1 Close the valves of the inlet and outlet branch pipes of the annular cylindrical isolation chamber, the valves of the inlet and outlet branch pipes of the water pump / turbine nacelle, and the valves of the atmospheric inlet and outlet branch pipes. Open the valves of the inlet and outlet branch pipes of the cylindrical caisson and the valves of the inlet and outlet branch pipes of the compressed gas unit to enter the power generation state. According to the energy storage power generation control strategy, the sealing door of the energy storage power generation inlet and outlet is opened. Under the action of water head pressure, the water turbine in the integrated pump / turbine unit starts to generate electricity. At the same time, under the constraint of the water turbine guide pipe opening, the water body rotates in the cylindrical caisson. Step 1.2 As the water level inside the cylindrical caisson gradually increases, when the continuous rotational kinetic energy of the water exceeds the minimum rotational force of the track-type rotating propeller unit, the track-type rotating propeller unit rotates, driving the generator of the integrated motor / generator to generate electricity; at the same time, the active and reactive power output of the integrated motor / generator 43 is controlled according to the power grid management control strategy. Step 1.3 As the power generation of the turbine increases, the water level inside the cylindrical caisson gradually rises. When the gas pressure inside the cylindrical caisson reaches the anchor water depth pressure of the airbag, the gas inside the cylindrical caisson is compressed into the airbag through the cylindrical caisson inlet and outlet branch pipes and valves, the compressed gas unit inlet and outlet branch pipes and valves, and the airbag inlet and outlet pipes. Step 1.4 When the power output of the grid meets the load demand, according to the energy storage and power generation control strategy, control the switching of the integrated pump / turbine to standby mode, or to switch the pump to drainage and energy storage mode, or to switch the turbine to power generation mode. Step 1.5 When the turbine generates electricity, when the water level in the cylindrical caisson reaches the upper limit of the caisson water level, the water injection speed is reduced based on historical data analysis, optimized capacity allocation and control strategies of the water in the cylindrical caisson, and the turbine generator of the integrated pump / turbine unit is controlled to reduce the power output and maintain the basic rotation speed of the water in the cylindrical caisson. In step 2, during energy storage, the following steps are implemented: Step 2.1 When there is residual power, start the water pump in the integrated water pump / turbine unit. The water in the cylindrical caisson is drawn out through the water pump guide pipe. Under the constraint of the water pump guide pipe, the water starts or continues to rotate in the cylindrical caisson. When the rotational kinetic energy of the water or the continuous rotational kinetic energy of the water is greater than the minimum rotational force of the track-type rotating propeller unit, the track-type rotating propeller unit rotates and generates electricity through the generator. Step 2.2 As the water volume inside the cylindrical caisson decreases, the gas pressure inside the cylindrical caisson decreases. When the gas pressure inside the cylindrical caisson is less than the gas pressure inside the airbag, the gas inside the airbag is released into the cylindrical caisson according to the gas compression and release control strategy, thereby increasing the gas pressure inside the cylindrical caisson to assist the water pump in draining water. Step 2.3 When the power grid needs to be improved, the integrated motor / generator is controlled to provide rapid support to the power grid according to the power grid improvement control strategy; Step 2.4 When the residual power is insufficient, according to the energy storage power generation control strategy, control the turbine in the integrated pump / turbine unit to enter the power generation state; Step 2.5 When the water pump discharges water from the cylindrical caisson to the lower limit of the caisson water level, the drainage speed is reduced based on historical data analysis, optimized capacity allocation of water in the cylindrical caisson, and energy storage and power generation control strategies. The integrated motor / generator is deactivated to reduce the load and maintain the basic rotation speed of the water in the cylindrical caisson.

[0020] Beneficial effects: 1) Compared to pumped storage power stations, it solves the problem of high geological requirements; 2) It does not occupy land area; 3) Compressed gas-assisted drainage energy storage; 4) Offshore wind power, on-site solar energy storage, and rapid grid support; 5) Track-mounted rotating propellers and foldable blades enhance the power density of drainage energy storage power generation; 6) The rotational kinetic energy of the water inside the caisson is the same as that of the gyroscope, which improves the stability of the caisson; 7) The orbital rotary propeller provides faster power generation response and can quickly and stably support the power grid; 8) Hydrophobic materials reduce the adhesion between water and the caisson wall and improve the corrosion resistance of the caisson. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] Figure 1 This is a system diagram of a track-mounted rotary propeller caisson energy storage and power generation system according to the present invention; Figure 2 A schematic diagram of the water inlet and outlet structure for creating a rotating water body for the structural support unit and the cylindrical caisson; Figure 3 This is a structural diagram of the orbital rotating propeller unit of the present invention; Figure 4 This is a structural diagram of a track-type rotating propeller unit according to another embodiment of the present invention; Figure 5 This is a cross-sectional view of a track-type rotary propeller unit according to another embodiment of the present invention.

[0023] The components include: cylindrical caisson unit 1, structural support unit 2, track-mounted rotary propeller unit 3, energy storage and power generation unit 4, caisson inlet and outlet pipes 5, compressed gas unit 6, caisson dome 7, cylindrical caisson body 8, upper chain track 9, lower chain track 10, caisson bottom 11, multi-anchor chamber suction anchor structure 12, energy storage and power generation inlet and outlet 13, energy storage and power generation inlet and outlet sealing door 14, energy storage and power generation inlet and outlet channel 15, annular cylindrical isolation chamber 16, water pump / turbine chamber 17, water pump / turbine inlet and outlet 18, personnel maintenance passage 19, inner ring sealed door 20, outer ring sealed door 21, water pump / turbine sealed door 22, atmospheric inlet and outlet branch pipes and valves 23, annular cylindrical isolation chamber inlet and outlet branch pipes and valves 24, water pump / turbine... 25. Intake and exhaust branch pipes and valves for the cabin; 26. Intake and exhaust branch pipes and valves for the cylindrical caisson; 27. Intake and exhaust branch pipes and valves for the compressed gas unit; 28. Intake and exhaust pipes for the airbag; 29. ​​Airbag; 30. Integrated pump / turbine unit; 31. Turbine guide pipe; 32. Turbine guide check valve; 33. Pump guide pipe; 34. Pump guide check valve; 35. Turbine guide pipe inlet; 36. Pump guide pipe inlet; 37. Blade; 38. Blade frame; 39. Ring chain; 40. Transmission gear; 41. Transmission shaft; 42. Integrated motor / generator unit; 43. Blade slide frame; 44. Traction float; 45. Sliding track; 46. Lower frame; 47. Upper frame; 48. Vertical frame; 49. 1 / 2 height sub-blade; 50. Hinge; 51. Rotating shaft; 52. Sub-blade; 53. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0025] like Figure 1 ,like Figure 2 ,like Figure 3As shown, the present invention provides a track-mounted rotating propeller caisson energy storage and power generation system comprising a cylindrical caisson unit 1, a structural support unit 2, a track-mounted rotating propeller unit 3, an energy storage and power generation unit 4, a caisson inlet and outlet pipe 5, and a compressed gas unit 6. The structural support unit 2, the track-mounted rotating propeller unit 3, and the energy storage and power generation unit 4 are located inside the cylindrical caisson unit 1, while the compressed gas unit 6 is located outside the cylindrical caisson unit 1 and is anchored to the top of the cylindrical caisson unit 1 based on the minimum head depth or the water body where the cylindrical caisson unit 1 is located.

[0026] like Figure 1 As shown, the structural support unit 2 is located at the center of the cylindrical caisson unit 1, passes through the caisson dome 7 and is connected to the caisson dome 7, and provides support for the caisson dome 7; the caisson air inlet and outlet pipe 5 is attached to the inner wall of the structural support unit 2; the track-type rotating propeller unit 3 is installed in the inner wall area of ​​the cylindrical caisson body 8 near the cylindrical caisson unit 1, and is slidably connected by the upper chain track 9 fixed to the caisson dome 7 of the cylindrical caisson unit 1 and the lower chain track 10 at the bottom 11 of the caisson. Furthermore, the cylindrical caisson unit 1 is a cylindrical tank structure, vertically installed in a water body of a certain size and depth, mainly comprising: a cylindrical caisson body 8, an upper caisson dome 7, and a multi-chamber suction anchor structure 12 at the caisson bottom 11. The multi-chamber suction anchor structure 12 is integrally manufactured and connected to the caisson bottom 11 of the cylindrical caisson unit 1, and is embedded in the silt layer at the bottom of the water body, anchoring the cylindrical caisson unit 1 to the bottom of the water body based on the suction anchor principle. The caisson dome 7 is structurally supported by a structural support unit 2 vertically placed at the center of the multi-chamber suction anchor structure 12. Furthermore, such as Figure 2 As shown, the structural support unit 2 includes an energy storage power generation inlet and outlet channel 15, an energy storage power generation inlet and outlet 13, an annular cylindrical isolation chamber 16, and a water pump / turbine chamber 17. The structural support unit 2 is a cylindrical structure, manufactured as a single unit. From top to bottom, it consists of an energy storage power generation inlet and outlet channel 15, an annular cylindrical isolation chamber 16, and a water pump / turbine chamber 17. The energy storage power generation caisson inlet and outlet pipe 15 runs through the entire structural support unit 2 from top to bottom and is connected to the water pump / turbine inlet and outlet port 18 of the energy storage power generation unit 4 in the water pump / turbine chamber 17.

[0027] The energy storage power generation inlet and outlet 13 includes an energy storage power generation inlet and outlet sealing door 14. Based on the principles of not damaging the aquatic environment and preventing objects from clogging the screen, the energy storage power generation inlet and outlet 13 is installed, and protective measures such as filter screens and electric fishing nets are installed around it. The energy storage power generation inlet and outlet sealing door 14 is opened or closed according to maintenance needs. The water pump / turbine nacelle 17 at the bottom of the structural support unit 2 is installed at the center of the caisson bottom 11, serving as support for the caisson dome 7, the energy storage power generation inlet and outlet channel 15, and the personnel maintenance passage 19. Furthermore, the annular cylindrical isolation chamber 16 and the pump / turbine nacelle 17 are installed vertically and vertically, sealed and independent of each other. The inner ring of the annular cylindrical isolation chamber 16 serves as the energy storage and power generation inlet and outlet channel 15. An inner ring sealing door 20 is installed on the inner ring wall of the annular cylindrical isolation chamber 16, and an outer ring sealing door 21 is installed on the outer ring wall, providing access for maintenance personnel to the pump / turbine nacelle 17 and the cylindrical caisson 8 according to the sealing door control program. A pump / turbine sealing door 22 is installed between the bottom of the annular cylindrical isolation chamber 16 and the top of the pump / turbine nacelle 17, providing access for personnel to the pump / turbine nacelle 17.

[0028] Furthermore, the caisson air intake and exhaust pipe 5 is attached to the inner wall of the structural support unit 2. The caisson air intake and exhaust pipe 5 is equipped with five air intake and exhaust branch pipes and valves, namely atmospheric air intake and exhaust branch pipe and valve 23, annular cylindrical isolation chamber air intake and exhaust branch pipe and valve 24, water pump / turbine nacelle air intake and exhaust branch pipe and valve 25, cylindrical caisson body air intake and exhaust branch pipe and valve 26, and compressed gas unit air intake and exhaust branch pipe and valve 27.

[0029] Among them, the atmospheric intake and exhaust branch pipes and valves 23 are connected to the atmosphere, and the gas exchange between the caisson intake and exhaust pipes 5 and the atmosphere is controlled by the electrically controlled valves; the annular cylindrical isolation chamber intake and exhaust branch pipes and valves 24 are connected to the interior of the annular cylindrical isolation chamber 16, and the intake or exhaust of the atmosphere or compressed gas is controlled by the electrically controlled valves, which can provide gas supply for maintenance personnel; the water pump / turbine nacelle intake and exhaust branch pipes and valves 25 are connected to the interior of the water pump / turbine nacelle 17, and the water pump / turbine nacelle 17 is cooled by the valves 25, while the gas supply for maintenance personnel is also provided; the compressed gas unit intake and exhaust branch pipes and valves 27 are connected to the airbag intake and exhaust pipes 28, and the compressed gas in the airbag 29 is controlled by the electrically controlled valves.

[0030] The intake and exhaust branch pipes and valves 26 of the cylindrical caisson body pass through the dome 7 of the caisson body and are connected to the internal gas of the cylindrical caisson body 8. The gas in and out of the cylindrical caisson body 8 is controlled by the electrically controlled valves.

[0031] Furthermore, such as Figure 2As shown, a water pump / turbine integrated unit 30 is installed inside the water pump / turbine nacelle 17. The water inlet of the turbine and the water outlet of the water pump are the same water pump / turbine inlet / outlet 18, which is connected to the energy storage power generation inlet / outlet channel 15. The water outlet of the turbine is connected to the interior of the cylindrical caisson 8 through the water pump / turbine nacelle 17 via the water turbine guide pipe 31. The water inlet of the water pump is connected to the interior of the cylindrical caisson 8 through the water pump guide pipe 33 through the water pump / turbine nacelle 17. The turbine guide pipe 31 and the pump guide pipe 33 are horizontally installed along the outer circumference of the pump / turbine nacelle 17. A turbine guide check valve 32 is embedded in the turbine guide pipe 31, and a pump guide check valve 34 is embedded in the pump guide pipe 33. The turbine guide pipe inlet 35 and the pump guide pipe inlet 36 are on the same radius circumference and face the same direction, ensuring that the water rotates in one direction inside the cylindrical caisson 8 during turbine power generation or pump drainage. To improve the efficiency of the drainage-storage power generation system and fully utilize the angular kinetic energy generated by the water rotation to drive the track-mounted rotating propeller unit 3 for power generation; to further improve efficiency and reduce the viscous resistance between the water rotation and the cylindrical caisson wall, while also considering structural corrosion protection, a hydrophobic coating is applied to the cylindrical caisson wall as a protective layer.

[0032] Furthermore, such as Figure 3 As shown, the track-type rotating propeller unit 3 includes an upper chain track 9, a lower chain track 10, several propeller blades 37, and a ring chain 40.

[0033] The upper chain track 9 and the lower chain track 10 are concentric circular tracks of the cylindrical caisson body 8. The upper chain track 9 and the lower chain track 10 have embedded ring chains 40, and are installed near the wall of the cylindrical caisson body 8, at a radius equal to or slightly greater than half the width of the paddle blades 38. The upper chain track 9 is fixedly installed on the caisson dome 7 of the cylindrical caisson body 8, and the lower chain track 10 is fixedly installed on the bottom 11 of the caisson.

[0034] The annular chain 40 inside the upper chain track 9 is connected to the transmission gear 41, and the transmission gear 41 is connected to the motor / generator integrated unit 43 of the energy storage and power generation unit 4 through the transmission shaft 42 passing through the dome 7 of the caisson.

[0035] According to the formula for the rotational kinetic energy of water The rotational kinetic energy is related to the square of the radius. The larger the radius, the greater the rotational kinetic energy of the water. Therefore, the closer the installation position of the propeller 37 is to the inner wall of the cylindrical caisson 8, the greater its kinetic energy.

[0036] The motion of several rotor blades 37 is based on hydrodynamics and takes into account the generation of turbulent disturbances. The distance between the rotor blades 37 is optimized and they are installed at equal intervals between the upper chain track 9 and the lower chain track 10. The rotor blades 37 are composed of blades 38 and blades 39. The structure of the blades 38 is designed according to hydrodynamics. The semi-cylindrical hollow structure of the blades 39 has a certain buoyancy, reducing the friction between the rotor blades 37 and the lower chain track 10. The blades 38 are fixedly installed on one side of the semi-cylindrical plane of the blades 39. The two ends of the blades 39 are fixedly connected to the inner annular chains 40 of the upper chain track 9 and the lower chain track 10, respectively.

[0037] When the water rotates and does work, it drives several propellers 37 to move the annular chain 40 in a circular motion. Simultaneously, the annular chain 40 drives the transmission gear 41 through the transmission shaft 42 to drive the integrated motor / generator 43 to generate electricity. When the power grid needs reactive power support, or when the water's rotation speed is below its limit (i.e., the critical speed at which a hydroclimate occurs), the motor is started to increase the load or the rotation speed of the water is controlled. Specifically, the rotation speed is increased to reach the minimum sustaining speed; the rotation speed is decreased. When the water volume in the cylindrical caisson 8 decreases to the point where it can no longer sustain the rotation of the track-mounted rotating propeller unit 3 to generate electricity, the motor starts, and the water is decelerated to a stop.

[0038] Furthermore, the energy storage power generation unit 4 includes an integrated motor / generator unit 43 and an integrated water pump / turbine unit 30; The integrated pump / turbine unit 30 is installed inside the pump / turbine nacelle 17. When there is excess new energy power supply, the pump / turbine unit 30 starts the pump and discharges the water in the cylindrical caisson 8 through the pump guide pipe port 36 and the pump through the energy storage power generation inlet and outlet channel 15. At the same time, during the process of pumping water out, due to the constraint of the pump guide pipe port 36 and the pump guide check valve 34, the water rotates in the direction of the constraint.

[0039] When the power grid needs to support the water supply, the water turbine is started. The water is driven by the water turbine to generate electricity through the inlet and outlet channels 15 of the energy storage power generation unit and enters the cylindrical caisson. The water is discharged through the water turbine guide pipe outlet 35. Due to the constraints of the water turbine guide pipe 31, the water turbine guide pipe outlet 35 and the water turbine guide check valve 32, the outlet direction is on the same radius circle as the water pump guide pipe outlet 36 and faces opposite directions. Therefore, the rotation direction of the water constrained by the water turbine guide pipe outlet 35 is the same as the rotation direction of the water constrained by the water pump guide pipe outlet 36. The water rotation inside the cylindrical caisson 8 always maintains one direction.

[0040] Because the inner wall of the cylindrical caisson 8 is coated with a hydrophobic material, the viscous resistance between the water rotation and the inner wall of the cylindrical caisson 8 is reduced based on the properties of the hydrophobic material, thereby further ensuring the efficiency of the kinetic energy of the water rotation driving the integrated motor / generator 43.

[0041] Furthermore, the compressed gas unit 6 includes an air bladder 29 and an air bladder inlet and outlet pipe 28; Based on the minimum water head height or the top depth of the cylindrical caisson 8, the airbag 29 uses the cylindrical caisson 8 as an anchor pile to anchor itself in the top or surrounding water of the cylindrical caisson 8. The airbag 29 is connected to the caisson's air intake and exhaust pipe 5 through the airbag intake and exhaust pipe 28 and the compressed gas unit intake and exhaust branch pipe 27. The compressed gas entering and exiting the airbag 29 is controlled according to the gas compression and release control strategy.

[0042] When the turbine generates electricity, the electrically controlled valves of the compressed gas unit inlet and outlet branch pipe 27 and the cylindrical caisson body inlet and outlet branch pipe 26 are opened respectively, and the electrically controlled valves of other branch pipes on the caisson body inlet and outlet pipes are closed to establish a gas channel between the compressed gas unit 6 and the cylindrical caisson body 8.

[0043] During hydroelectric power generation, the water pressure at its depth drives the turbine to generate electricity and enters the cylindrical caisson 8. Simultaneously, the gas inside the cylindrical caisson 8 is compressed. When the gas pressure inside the cylindrical caisson 8 reaches the minimum head pressure, i.e., the anchoring depth pressure of the airbag 29, the gas inside the cylindrical caisson 8 is compressed into the airbag 29 via the cylindrical caisson inlet and outlet branch pipes and valves 26, the compressed gas unit inlet and outlet branch pipes and valves 27, and the airbag inlet and outlet pipes 28.

[0044] When the energy storage pump drains water, the valves of the compressed gas unit inlet and exhaust branch pipes and the valves of the cylindrical caisson inlet and exhaust branch pipes are opened respectively to establish a gas channel between the compressed gas unit 6 and the cylindrical caisson 8. The compressed gas in the airbag 29 is released into the cylindrical caisson 8 through the airbag inlet and exhaust pipe 28, the compressed gas unit inlet and exhaust branch pipes and valve 27, and the cylindrical caisson inlet and exhaust branch pipes and valve 26, which helps the pump drain water. At the same time, since the temperature and humidity of the compressed gas in the airbag 29 are the same as those in the cylindrical caisson 8, the structure and coating inside the cylindrical caisson 8 are not structurally altered.

[0045] Preferred, such as Figure 4 , Figure 5 As shown, the rotor blade 37 is foldable and includes a sub-blade unit, a blade slide frame 44, and a blade rib 39.

[0046] Furthermore, the sub-blade unit consists of several sub-blades 53 and a traction float 45. The sub-blades 53 are horizontal rectangular structures. A rotating shaft 52 is installed at 1 / 2 of the height of each side of the horizontal rectangular structure. Two hinges 51 are fixedly placed on each of the two horizontal long sides of the horizontal rectangular structure. Each sub-blade 53 is connected to the others by the hinges 51. The uppermost and lowermost terminal blades are 1 / 2-height sub-blades 50. The two ends of each 1 / 2-height sub-blade 50 are not fitted with pivots. Two hinges 51 are equally fixed on each of the two long sides of each 1 / 2-height sub-blade 50. The upper end of the uppermost 1 / 2-height sub-blade 50 is connected to the lower part of the traction float 45 via hinges 51, and the lower end of the 1 / 2-height sub-blade 50 is connected to the lower end of the uppermost sub-blade 53 via hinges 51.

[0047] The upper end of the bottom half-height sub-blade 50 is connected to the lower end of the bottom sub-blade 53 by a hinge 51, and the lower end of the half-height sub-blade 50 is connected to the lower frame 47 of the blade slide frame 44 by a hinge 51.

[0048] Specifically, the definition of rectangular placement is: a rectangle with its short side horizontal is a vertical rectangle, and a rectangle with its long side horizontal is a horizontal rectangle.

[0049] The traction pontoon 45 is an inverted cylindrical sealed structure. To resist the gas pressure inside the cylindrical caisson 8, it is filled with gas at a certain pressure. The axial length of the traction pontoon 45 is the same as the width of the sub-blades 53. Since the buoyancy of the traction pontoon 45 is related to the radius of the cylindrical structure, the buoyancy of the traction pontoon 45 is determined by the weight of several sub-blades 53. Similarly, concentric sub-blades are installed at the axial center of the traction pontoon 45. The upper end of the 1 / 2-high blade 50 is connected to the lower end of the traction buoy 45 via a hinge 51.

[0050] The propeller slide rail frame 44 is a vertical rectangular frame. Two vertical frame edges form sliding tracks 46 for the vertical movement of the traction floats 45 and sub-blades 53. The height inside the propeller slide rail frame 44 is the longitudinal unfolded height of the sub-blade unit, and the width inside the frame is the same as the width of the sub-blades 53. The traction floats 45 in the sub-blade units are located at the top and are embedded in the sliding tracks 46 of the propeller slide rail frame along with each sub-blade 53 via a pivot 52. After folding, the sub-blade units are placed horizontally on top of the lower frame 47 of the propeller slide rail frame 44.

[0051] When the cylindrical caisson 8 is filled with water for power generation, the water level inside the cylindrical caisson 8 gradually rises. Under the buoyancy of the water, the traction float 45 pulls the sub-blade 53 upward along the sliding track 46, ensuring that the sub-blade 53 always obtains the optimal rotational kinetic energy of the water. When the water level inside the cylindrical caisson 8 gradually rises and approaches the caisson dome 7, the traction float 45 pulls the sub-blade 53 upward along the sliding track 46 to fully unfold, obtaining greater rotational kinetic energy of the water.

[0052] When the cylindrical caisson 8 is dewatering for energy storage, the water level inside the rotating water body gradually decreases. Under the influence of buoyancy and the weight of the sub-blades 53, the traction float 45 pulls the sub-blades 53 downwards along the sliding track 46 of the blade slide frame. When the water level inside the cylindrical caisson 8 gradually decreases and approaches the lowest water level, the traction float 45 pulls the sub-blades 53 downwards along the sliding track 46 of the blade slide frame, so that all the sub-blades 53 are in a horizontally folded state.

[0053] Since the sub-blade 53, including the traction float 45, is always submerged in the water, compared to the non-foldable blades, the blades not submerged in the water are subject to air resistance, which greatly reduces the water rotation efficiency. Therefore, the foldable blade 37 is not affected by air resistance, thus achieving greater water rotation efficiency.

[0054] Furthermore, a blade rib 39 is installed at the center of the upper frame 48 and lower frame 47 of the blade slide frame 44, and is fixedly connected to the annular chain 40 inside the upper chain track 9 and lower chain track 10. The movement of several foldable blades 37 is based on hydrodynamics and takes into account the generation of turbulent disturbances. The distance between the foldable blades 37 is optimized and they are installed at equal intervals between the upper chain track and the lower chain track. The foldable blades 37 are composed of sub-blades 53 and blade ribs 39. The structure of the sub-blades 53 is designed according to hydrodynamics. Since the hollow air-filled structure of the traction float 45 has a certain buoyancy, the friction of the foldable blades 37 on the lower chain track 10 is reduced. The two ends of the blade ribs 39 are fixedly connected to the inner annular chain 40 of the upper chain track 9 and the lower chain track 10, respectively.

[0055] When the water rotates and does work, it drives several foldable propellers 37 to move the annular chain 40 in a circular motion. At the same time, the annular chain 40 drives the transmission gear 41 through the transmission shaft 42 to drive the integrated motor / generator 43 to generate electricity. When the power grid needs reactive power support or when the water rotation speed is below the limit speed, i.e., the critical speed of the hydrojugation phenomenon, the motor is started to increase the load or control the acceleration and deceleration of the water rotation. Specifically, the water rotation speed is increased to reach the minimum maintenance speed; the water deceleration is controlled. When the water volume in the cylindrical caisson 8 decreases and the water level cannot be used to tug the foldable propellers 37 to unfold through the traction float 45, and the foldable propellers 37 are in a fully folded state, unable to maintain the rotation of the track-type rotating foldable propeller unit 3 to generate electricity, the motor is started to control the water deceleration to stop.

[0056] The present invention also provides a control method for a track-mounted rotary propeller caisson energy storage and power generation system, comprising the following steps: Initial state: The airbag 29 is placed at the minimum water head depth or on the cylindrical caisson 8. There is no water inside the cylindrical caisson 8, and it is connected to the local atmosphere through the atmospheric vent valve. There is no gas inside the airbag 29. Step 1, in power generation mode: Step 1.1 Close the valves of the inlet and outlet branch pipes of the annular cylindrical isolation chamber, the valves of the inlet and outlet branch pipes of the water pump / turbine nacelle, and the valves of the atmospheric inlet and outlet branch pipes. Open the valves of the inlet and outlet branch pipes of the cylindrical caisson and the valves of the inlet and outlet branch pipes of the compressed gas unit to enter the power generation state.

[0057] According to the energy storage power generation control strategy, the sealing door of the energy storage power generation inlet and outlet is opened. Under the action of water head pressure, the water turbine in the integrated pump / turbine unit starts to generate electricity. At the same time, under the constraint of the water turbine guide pipe, the water body rotates in the cylindrical caisson.

[0058] Step 1.2 As the water level inside the cylindrical caisson 8 gradually increases, the mass of the water... Increase, according to the formula for the rotational kinetic energy of water. As the rotational kinetic energy of the water increases, and the sustained rotational kinetic energy exceeds the minimum rotational force of the track-mounted rotary propeller unit 3, the track-mounted rotary propeller unit 3 rotates, driving the generator of the integrated motor / generator unit 43 to generate electricity. Simultaneously, the active and reactive power outputs of the integrated motor / generator unit 43 are controlled according to the power grid management control strategy.

[0059] Step 1.3 As the power generation of the turbine increases, the water level inside the cylindrical caisson 8 gradually rises. Due to the closure of the branch pipe valves, the gas above the water in the cylindrical caisson 8 is compressed, and the gas pressure increases. When the gas pressure inside the cylindrical caisson 8 reaches the anchoring water depth pressure of the airbag 29, the gas inside the cylindrical caisson 8 is compressed into the airbag 29 through the cylindrical caisson inlet and outlet branch pipes and valves, the compressed gas unit inlet and outlet branch pipes and valves, and the airbag inlet and outlet pipes.

[0060] Step 1.4 When the power output of the grid meets the load demand, according to the energy storage and power generation control strategy, control the switching of the integrated pump / turbine 30 to standby state, or switch to the pump to enter the drainage and energy storage state, or switch to the turbine to enter the power generation state. Step 1.5 When the turbine generates electricity, when the water injection trend of the cylindrical caisson 8 reaches the upper limit of the caisson water volume, based on historical data analysis, optimized water volume allocation and control strategy within the cylindrical caisson 8, the water injection speed is reduced, and the turbine generator of the integrated pump / turbine unit 30 is controlled to reduce power generation output, maintaining the basic rotation speed of the water volume within the cylindrical caisson.

[0061] During step 2, in the energy storage state: Step 2.1 When there is residual power, start the water pump in the integrated water pump / turbine unit 30. Water in the cylindrical caisson 8 is drawn out through the water pump guide pipe. Under the constraint of the water pump guide pipe, the water starts or continues to rotate within the cylindrical caisson. When the rotational kinetic energy of the water or the continuous rotational kinetic energy of the water exceeds the minimum rotational force of the track-type rotating propeller unit 3, the track-type rotating propeller unit 3 rotates, generating electricity through the generator.

[0062] Step 2.2 As the water volume inside the cylindrical caisson 8 decreases, the gas pressure inside the cylindrical caisson 8 decreases. When the gas pressure inside the cylindrical caisson is less than the gas pressure inside the airbag 29, the gas inside the airbag 29 is controlled to be released into the cylindrical caisson 8 according to the gas compression and release control strategy, thereby increasing the gas pressure inside the cylindrical caisson 8 to assist the water pump in draining water.

[0063] Step 2.3 When the power grid needs to be managed, the integrated motor / generator 43 is controlled to provide rapid support to the power grid according to the power grid management control strategy.

[0064] Step 2.4 When the residual power is insufficient, according to the energy storage power generation control strategy, control the turbine in the integrated pump / turbine unit 30 to enter the power generation state; Step 2.5 When the water pump discharges water from the cylindrical caisson 8 to the lower limit of the caisson water level, the drainage speed is reduced based on historical data analysis, optimized capacity allocation of water in the cylindrical caisson 8, and energy storage and power generation control strategies. The integrated motor / generator 43 exits the working state to reduce the load and maintains the basic rotation speed of the water in the cylindrical caisson 8.

[0065] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A track-mounted rotary propeller caisson energy storage and power generation system, characterized in that, It includes a cylindrical caisson unit, a structural support unit, a track-mounted rotary propeller unit, an energy storage and power generation unit, caisson inlet and outlet pipes, and a compressed gas unit; the structural support unit, track-mounted rotary propeller unit, and energy storage and power generation unit are placed inside the cylindrical caisson unit, and the compressed gas unit is placed outside the cylindrical caisson unit and anchored to the top of the cylindrical caisson unit according to the minimum water head depth or the water body where the cylindrical caisson unit is located; The structural support unit is located at the center of the cylindrical caisson unit, penetrates the caisson dome and connects with the caisson dome, and provides support for the caisson dome. The caisson's air intake and exhaust pipes are attached to the inner wall of the structural support unit; the track-type rotating propeller unit is installed in the inner wall area of ​​the cylindrical caisson body near the cylindrical caisson unit, and is slidably connected by the upper chain track fixed to the dome of the cylindrical caisson unit and the lower chain track at the bottom of the caisson. The cylindrical caisson unit is a cylindrical tank structure, including a cylindrical caisson body, an upper caisson dome, and a multi-chamber suction anchor structure at the bottom of the caisson. The multi-chamber suction anchor structure is integrated with the bottom of the cylindrical caisson unit. The multi-chamber suction anchor structure is embedded in the silt layer at the bottom of the water body, and the cylindrical caisson unit is anchored to the bottom of the water body based on the suction anchor principle. The caisson dome is structurally supported by a structural support unit that is vertically placed in the center of the multi-chamber suction anchor structure. The energy storage power generation unit includes an integrated motor / generator and an integrated water pump / turbine; The integrated pump / turbine unit is installed inside the pump / turbine nacelle. The structural support unit includes an energy storage power generation inlet and outlet channel, an energy storage power generation inlet and outlet, an annular cylindrical isolation chamber, and a water pump / turbine chamber. The structural support unit is a cylindrical structure, manufactured as a single unit. From top to bottom, it consists of an energy storage power generation inlet and outlet channel, an annular cylindrical isolation chamber, and a water pump / turbine chamber. The energy storage power generation caisson inlet and outlet pipe runs through the entire structural support unit from top to bottom and is connected to the water pump / turbine inlet and outlet of the energy storage power generation unit in the water pump / turbine chamber. The water pump / turbine nacelle at the bottom of the structural support unit is installed at the center of the caisson bottom; The annular cylindrical isolation chamber is installed vertically and vertically with the pump / turbine nacelle, and is sealed and independent of each other. The inner ring of the annular cylindrical isolation chamber is the energy storage and power generation inlet and outlet channel, and an inner ring sealing door is installed on the inner ring wall and an outer ring sealing door is installed on the outer ring wall. A pump / turbine sealing door is installed between the bottom of the annular cylindrical isolation chamber and the top of the pump / turbine nacelle. The track-type rotary propeller unit includes an upper chain track, a lower chain track, several propellers, and a ring chain; The upper and lower chain tracks are concentric circular tracks of a cylindrical caisson body, with annular chains embedded within them. The upper chain track is fixedly installed on the dome of the cylindrical caisson body, while the lower chain track is fixedly installed on the bottom of the caisson. The annular chain inside the upper chain track is connected to a transmission gear, which is connected to the motor / generator of the energy storage and power generation unit via a transmission shaft passing through the dome of the caisson. Several propeller blades are installed at equal intervals between the upper and lower chain tracks; the propeller blades consist of blades and blades, with the blades fixedly installed on one side of the semi-cylindrical blade plane, and the two ends of the blades fixedly connected to the inner ring chains of the upper and lower chain tracks respectively.

2. The track-mounted rotary propeller caisson energy storage and power generation system according to claim 1, characterized in that, The caisson's air intake and exhaust pipes are attached to the inner pipe wall of the structural support unit. The caisson's air intake and exhaust pipes are equipped with five air intake and exhaust branch pipes and valves, namely, atmospheric air intake and exhaust branch pipes and valves, annular cylindrical isolation chamber air intake and exhaust branch pipes and valves, water pump / turbine nacelle air intake and exhaust branch pipes and valves, cylindrical caisson body air intake and exhaust branch pipes and valves, and compressed gas unit air intake and exhaust branch pipes and valves. The intake and exhaust branch pipes and valves of the cylindrical caisson body pass through the dome of the caisson body and are connected to the internal gas of the cylindrical caisson body. The gas in and out of the cylindrical caisson body is controlled by the electrically controlled valves.

3. The track-mounted rotary propeller caisson energy storage and power generation system according to claim 1, characterized in that, The pump / turbine nacelle houses an integrated pump / turbine unit. The turbine inlet and pump outlet are the same pump / turbine inlet / outlet, connected to the energy storage power generation inlet / outlet channel. The turbine outlet is connected to the interior of the cylindrical caisson via a turbine guide pipe passing through the pump / turbine nacelle. The pump inlet is also connected to the interior of the cylindrical caisson via a pump guide pipe passing through the pump / turbine nacelle. The turbine guide pipe and pump guide pipe are horizontally positioned along the outer circumference of the pump / turbine nacelle. A turbine guide check valve and a pump guide check valve are both embedded in the turbine guide pipe. The turbine guide pipe outlet and the pump guide pipe outlet are on the same radius circle and face the same direction.

4. The track-mounted rotary propeller caisson energy storage and power generation system according to claim 1, characterized in that, The compressed gas unit includes an air bladder and an air bladder inlet and outlet pipes; Based on the minimum water head height or the top depth of the cylindrical caisson, the airbag uses the cylindrical caisson as an anchor pile to anchor it in the top or surrounding water of the cylindrical caisson. The airbag is connected to the caisson's airbag intake and exhaust pipes through the airbag intake and exhaust pipes and the compressed gas unit intake and exhaust branch pipes, which controls the compressed gas entering and exiting the airbag.

5. The track-mounted rotary propeller caisson energy storage and power generation system according to claim 1, characterized in that, The rotor blade is foldable and includes a sub-blade unit, a blade slide frame, and a blade frame. The sub-blade unit consists of several sub-blades and a traction buoy. The sub-blades are horizontal rectangular structures. A pivot is installed at 1 / 2 of the height of each side of the horizontal rectangular structure. Two hinges are fixedly placed on each of the two horizontal long sides of the horizontal rectangular structure. Each sub-blade is connected to the others by the hinges. Among them, the uppermost terminal blade and the lowermost terminal blade are 1 / 2 height sub-blades. The two ends of the 1 / 2 height sub-blades are not installed with shafts. The 1 / 2 height sub-blades are also fixed with two hinges on each of the two long sides. The upper end of the uppermost 1 / 2 height sub-blade is connected to the lower part of the traction buoy by a hinge, and the lower end of the 1 / 2 height sub-blade is connected to the lower end of the uppermost sub-blade by a hinge. The upper end of the bottom 1 / 2 height sub-blade is connected to the lower end of the next bottom sub-blade by a hinge, and the lower end of the 1 / 2 height sub-blade is connected to the lower edge of the blade slide frame by a hinge. The traction buoy is an inverted cylindrical sealed structure. To resist the gas pressure inside the cylindrical caisson, it is filled with gas at a certain pressure. The axial length of the traction buoy is the same as the width of the sub-blades. The axial center of the traction buoy is respectively equipped with the rotating shafts of the concentric sub-blades. The upper end of the 1 / 2-high blade is connected to the lower end of the traction buoy via a hinge.

6. The track-mounted rotary propeller caisson energy storage and power generation system according to claim 5, characterized in that, The blade slide rail frame is a vertical rectangular frame. The two vertical frames are sliding tracks for the traction buoy and sub-blades to move up and down. The height inside the blade slide rail frame is the longitudinal unfolded height of the sub-blade unit, and the width inside the frame is the same as the width of the sub-blade. The traction buoy in the sub-blade unit is at the top and is embedded into the sliding track of the blade slide rail frame along with each sub-blade via a pivot. After being folded, the sub-blade unit is placed horizontally on the bottom frame of the blade slide rail frame.

7. The track-mounted rotary propeller caisson energy storage and power generation system according to claim 5, characterized in that, The blade guide frame has blade ribs installed at the center of the upper and lower frames and fixedly connected to the annular chains inside the upper and lower chain tracks. The movement of several foldable blades is based on fluid dynamics and takes into account turbulence disturbances. The distance between the foldable blades is optimized and they are installed at equal intervals between the upper and lower chain tracks. Each foldable blade consists of sub-blades and blade ribs. The structure of the sub-blades is designed based on hydrodynamics. Since the hollow air-filled structure of the traction buoy has a certain buoyancy, the friction of the foldable blades on the lower chain track is reduced. The two ends of the blade ribs are fixedly connected to the inner annular chains of the upper and lower chain tracks, respectively.

8. A control method for a track-mounted rotary propeller caisson energy storage and power generation system according to any one of claims 1-7, characterized in that, Includes the following steps: Step 1: In power generation mode, perform the following steps: Step 1.1 Close the valves of the inlet and outlet branch pipes of the annular cylindrical isolation chamber, the valves of the inlet and outlet branch pipes of the water pump / turbine nacelle, and the valves of the atmospheric inlet and outlet branch pipes. Open the valves of the inlet and outlet branch pipes of the cylindrical caisson and the valves of the inlet and outlet branch pipes of the compressed gas unit to enter the power generation state. According to the energy storage power generation control strategy, the sealing door of the energy storage power generation inlet and outlet is opened. Under the action of water head pressure, the water turbine in the integrated pump / turbine unit starts to generate electricity. At the same time, under the constraint of the water turbine guide pipe opening, the water body rotates in the cylindrical caisson. Step 1.2 As the water level inside the cylindrical caisson gradually increases, when the continuous rotational kinetic energy of the water exceeds the minimum rotational force of the track-mounted rotary propeller unit, the track-mounted rotary propeller unit rotates, driving the generator of the integrated motor / generator to generate electricity; at the same time, the active and reactive power output of the integrated motor / generator is controlled according to the power grid management and control strategy. Step 1.3 As the power generation of the turbine increases, the water level inside the cylindrical caisson gradually rises. When the gas pressure inside the cylindrical caisson reaches the anchor water depth pressure of the airbag, the gas inside the cylindrical caisson is compressed into the airbag through the cylindrical caisson inlet and outlet branch pipes and valves, the compressed gas unit inlet and outlet branch pipes and valves, and the airbag inlet and outlet pipes. Step 1.4 When the power output of the grid meets the load demand, according to the energy storage and power generation control strategy, control the switching of the integrated pump / turbine unit to standby state, or to switch the pump to enter the drainage and energy storage state, or to switch the turbine to enter the power generation state. Step 1.5 When the turbine generates electricity, when the water level in the cylindrical caisson reaches the upper limit of the caisson water level, the water injection speed is reduced based on historical data analysis, optimized capacity allocation and control strategies of the water in the cylindrical caisson, and the turbine generator of the integrated pump / turbine unit is controlled to reduce the power output and maintain the basic rotation speed of the water in the cylindrical caisson. In step 2, during energy storage, the following steps are implemented: Step 2.1 When there is residual power, start the water pump in the integrated water pump / turbine unit. The water in the cylindrical caisson is drawn out through the water pump guide pipe. Under the constraint of the water pump guide pipe, the water starts or continues to rotate in the cylindrical caisson. When the rotational kinetic energy of the water or the continuous rotational kinetic energy of the water is greater than the minimum rotational force of the track-type rotating propeller unit, the track-type rotating propeller unit rotates and generates electricity through the generator. Step 2.2 As the water volume inside the cylindrical caisson decreases, the gas pressure inside the cylindrical caisson decreases. When the gas pressure inside the cylindrical caisson is less than the gas pressure inside the airbag, the gas inside the airbag is released into the cylindrical caisson according to the gas compression and release control strategy, thereby increasing the gas pressure inside the cylindrical caisson to assist the water pump in draining water. Step 2.3 When the power grid needs to be improved, the integrated motor / generator is controlled to provide rapid support to the power grid according to the power grid improvement control strategy; Step 2.4 When the residual power is insufficient, according to the energy storage power generation control strategy, control the turbine in the integrated pump / turbine unit to enter the power generation state; Step 2.5 When the water pump discharges water from the cylindrical caisson to the lower limit of the caisson water level, based on historical data analysis, optimized capacity allocation of water in the cylindrical caisson, and energy storage and power generation control strategies, the drainage speed is reduced, the integrated motor / generator is taken out of operation to reduce the load, and the basic rotation speed of the water in the cylindrical caisson is maintained.

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