Compressed air energy storage energy island

Abstract

The invention provides an offshore compressed air energy storage energy island, and belongs to the technical field of energy collection devices. The floating energy island comprises a floating energy island main body and a plurality of modular power generation units, and each unit comprises a wind energy and air turbine power generation assembly and an energy storage assembly. In the air turbine power generation assembly, an air turbine device with a through hole in the middle is connected with an A shaft of a generator and driven by wave energy to generate power. An extension shaft of the wind power generation assembly rotates under wind power and is connected with a shaft B of the generator to generate power, a ratchet wheel is fixed in a through hole of the extension shaft, and a pawl is arranged in the hole. When the rotating speed of the extension shaft is higher than that of the air turbine device, the ratchet and the pawl are locked; otherwise, the operation is free. The energy island accelerates the air turbine assembly through wind power generation, the high rotating speed of the air turbine assembly is maintained, and the power generation efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of offshore energy collection devices, and in particular relates to an energy island for compressed air energy storage. Background Art

[0002] Wave energy, a clean, renewable ocean energy source with abundant reserves, has strategic significance for optimizing the global energy structure. Air turbines, the core equipment for wave power generation, operate based on the principle of an oscillating water column. The undulations of the waves drive the reciprocating flow of air within the chamber, which in turn propels the turbine and drives the generator to generate electricity.

[0003] Research has shown that the power generation efficiency of air turbines exhibits a significant nonlinear relationship with speed. When operating below 30% of rated speed, insufficient air velocity causes the blade angle of attack to deviate from the optimal operating condition, resulting in a power generation efficiency of only 40%. Within the 30%-80% rated speed range, the air velocity and blade linear speed are significantly matched, allowing power generation efficiency to reach a high efficiency range of 70%-90%. However, when the speed exceeds the rated value, the increased Mach number of the airflow triggers shock wave losses, causing power generation efficiency to drop to 85%. Therefore, maintaining the device operating within the appropriate speed range is key to maximizing power generation efficiency.

[0004] However, due to the dynamic variations in wave period and amplitude at sea, air turbines often operate inefficiently under low-energy wave conditions due to insufficient speed. Therefore, using offshore wind energy as an auxiliary power source can effectively ensure that the turbines maintain their efficient speed range. To achieve diversified utilization of wind energy while also maintaining its independent power generation capabilities, this paper proposes an energy island solution that integrates a compressed air energy storage system, aiming to build a multi-energy, highly efficient, and coordinated marine energy development system. Summary of the Invention

[0005] In order to overcome the deficiencies in the prior art, the present invention proposes an energy island for compressed air energy storage, which aims to keep the air turbine device in the optimal power generation rotation range as much as possible.

[0006] In order to achieve the above object, the present invention proposes the following technical solutions: An energy island for compressed air energy storage includes the following structures: The main body of the floating energy island; Multiple modular power generation units are installed on the main body of the floating energy island; the multiple modular power generation units include wind power generation components, air turbine power generation components and energy storage components; The air turbine power generation assembly includes the following structures: An air turbine device has a through hole formed in its center. The air turbine device is connected to the generator shaft of the generator A. Under the wave energy, the air turbine device drives the generator A to rotate and generate electricity. The wind power generation component includes the following structures: The extension shaft is rotated by wind power; the extension shaft is connected to the generator shaft of generator B, and the extension shaft drives the generator B to rotate and generate electricity under the wind energy; The ratchet is located in the through hole and is fixedly connected to the extension shaft; a pawl is provided in the through hole; when the rotation speed of the extension shaft is higher than the rotation speed of the air turbine device, the ratchet and the pawl are in a locked state; when the rotation speed of the extension shaft is lower than the rotation speed of the air turbine device, the ratchet and the pawl are in a non-locked free state.

[0007] Furthermore, the air turbine power generation assembly also includes: a mounting platform, a wave energy pressure storage airbag, a turbine inlet pipe and a turbine outlet pipe. A cavity is provided inside the mounting platform, and the turbine inlet pipe and the turbine outlet pipe are both sleeved with a restraining tube; one end of the turbine inlet pipe and the turbine outlet pipe are connected to the mounting platform cavity, and the other end faces the air turbine device; the internal airway of the wave energy pressure storage airbag is connected to the mounting platform cavity, which can change the pressure in the mounting platform cavity under the fluctuation of waves, so that the gas flows through the turbine inlet pipe and the turbine outlet pipe, the extension shaft is passed through the restraining tube, and a connecting sleeve is sleeved on the extension shaft, and the inner wall of the connecting sleeve is connected to the outer wall of the extension shaft by a bearing; sealant is filled between the outer wall of the connecting sleeve, the outer wall of the turbine inlet pipe, the outer wall of the turbine outlet pipe and the inner wall of the restraining tube.

[0008] Furthermore, the wind power generation component also includes: a wind turbine shaft, a vertical axis wind turbine blade is installed on the top, a worm is installed on the bottom, and a worm gear is installed on the extension shaft. Through the cooperation between the worm gear and the worm, the vertical axis wind turbine blade transmits wind force to the extension shaft, causing the extension shaft to rotate.

[0009] Furthermore, the wind power generation component further includes: the energy storage component includes a low-voltage energy storage component, and the low-voltage energy storage component includes the following structure: The low-pressure gas storage tank is fixedly installed on the upper surface of the floating energy island; A low-pressure air inlet pipe, one end of which is fixedly connected to the mounting platform and communicates with the cavity thereof, and the other end of which is fixedly connected to and communicates with the low-pressure air storage tank. The low-pressure air inlet pipe is equipped with a second solenoid valve and a second one-way valve. Due to the one-way conduction characteristic of the second one-way valve, air can only enter the low-pressure air storage tank from the low-pressure air inlet pipe. One end of the low-pressure outlet pipe is fixedly connected to and communicated with the low-pressure gas storage tank, and the other end passes through the mounting platform and is fixedly connected to and communicated with the turbine outlet pipe. The connection point between the low-pressure outlet pipe and the turbine outlet pipe is set as point O, then point O is located between the first solenoid valve and the outlet end of the turbine outlet pipe; the first solenoid valve is installed at point O of the turbine outlet pipe and the end close to the wave energy pressure storage airbag.

[0010] Furthermore, the energy storage assembly further includes a high-pressure gas storage assembly, which includes the following structure: High-pressure gas storage tank, fixedly connected to the main body of the floating energy island; A first pressurizing pipe, one end of which is fixedly connected to and communicates with the low-pressure gas storage tank; a fourth solenoid valve and a third one-way valve are mounted on the first pressurizing pipe; An air compressor, wherein the gas inlet is fixedly connected to and communicates with the other end of the first pressurized pipe, and the gas outlet at the other end is fixedly connected to and communicates with the high-pressure gas storage tank through the second pressurized pipe; The high-pressure return air pipe has one end fixedly connected to and communicated with the high-pressure gas storage tank and the other end fixedly connected to and communicated with the low-pressure gas storage tank. The high-pressure return air pipe is equipped with a fifth solenoid valve.

[0011] Furthermore, a first one-way valve and a fifth one-way valve are respectively installed on the turbine inlet pipe and the turbine outlet pipe; based on the one-way conduction principle of the first one-way valve, external gas can enter the mounting platform cavity from the turbine inlet pipe; based on the one-way conduction principle of the fifth one-way valve, the air in the mounting platform cavity can flow from the turbine outlet pipe to the outside.

[0012] Furthermore, the end surface area of ​​the turbine inlet pipe is larger than the end surface area of ​​the turbine outlet pipe.

[0013] The above technical solutions can achieve the following beneficial effects: Due to the design of the ratchet pawl, when the air turbine is rotating at a high speed and the wind turbine connected to the ratchet and extension shaft is rotating at a slow speed, the ratchet does not lock, allowing the air turbine to generate electricity through generator A and the wind power to generate electricity through generator B, without interfering with each other. When the air turbine is rotating at a low speed and the wind turbine connected to the ratchet and extension shaft is rotating at a high speed, the wind turbine "accelerates" the air turbine, preventing the air turbine from entering a low power generation efficiency range due to excessively slow speed. When both the air turbine and wind turbine speeds are slow, the compressed energy is released, accelerating the air turbine and generating electricity. Through multiple design mechanisms, the air turbine speed is maintained at a high level as much as possible, thereby maintaining good power generation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the main body of the energy island; Figure 2 This is a simplified diagram of the main body of the energy island; Figure 3 It is a schematic diagram of the structure after the air turbine power generation component and the wind power generation component are combined; Figure 4 It is a schematic diagram of the structure inside the restraint tube; Figure 5 It is a schematic diagram of the structure when the extension shaft is connected to the air turbine power generation assembly; Figure 6 Front view of the ratchet and air turbine assembly.

[0015] 1. Floating energy island body; 2. Wind power generation assembly; 21. Wind turbine shaft; 22. Generator B; 23. Extension shaft; 24. Worm gear; 25. Worm; 26. Connecting sleeve; 27. Bearing; 28. Ratchet; 29. ​​Pawl; 210. Through hole; 3. Air turbine power generation assembly; 31. Mounting platform; 32. Wave energy pressure accumulator; 33. Restraint tube; 34. Turbine inlet pipe; 35. Turbine outlet pipe; 36. First one-way valve; 37. First solenoid valve; 38. Air turbine device; 39. Bracket; 3 10. Generator A; 4. Energy storage component; 41. Low-pressure gas tank; 42. Low-pressure air inlet pipe; 43. Second solenoid valve; 44. Second one-way valve; 45. Low-pressure air outlet pipe; 46. Third solenoid valve; 47. Fifth one-way valve; 48. High-pressure gas tank; 49. First pressurizing pipe; 410. Fourth solenoid valve; 412. Third one-way valve; 413. Air compressor; 414. Second pressurizing pipe; 415. Fourth one-way valve; 416. High-pressure return pipe; 417. Fifth solenoid valve; 418. Sixth one-way valve. DETAILED DESCRIPTION

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0017] like Figure 1 As shown, an energy island for compressed air energy storage includes the following structures: The floating energy island body 1 is anchored to the seabed foundation or deep-sea anchor point through mooring cables to ensure the stability of the floating energy island body 1.

[0018] A plurality of modular power generation units are installed on the floating energy island body 1, which has the function of power generation and uses wind energy to maintain the air turbine device 38 within a high power generation efficiency speed range.

[0019] The plurality of modular power generation units include a wind power generation component 2 , an air turbine power generation component 3 and an energy storage component 4 .

[0020] like Figure 3 As shown, the air turbine power generation assembly 3 includes the following structures: The mounting platform 31 is fixedly connected to the side of the floating energy island body 1, and a cavity is formed inside the mounting platform 31.

[0021] The upper end of the wave energy storage airbag 32 is fixedly connected to the lower surface of the mounting platform 31 and adopts an open design. Through this opening, the air passage inside the wave energy storage airbag 32 communicates with the cavity of the mounting platform 31. The lower end is closed and immersed in the seawater. The wave energy storage airbag 32 adopts a corrugated structure. Under the influence of the rising and falling waves, its lower end moves vertically back and forth relative to the floating energy island body 1 and the mounting platform 31. This reciprocating motion continuously compresses and absorbs gas.

[0022] The restraining tube 33 is fixedly connected to the side of the mounting platform 31 , with one end communicating with the internal cavity from the side of the mounting platform 31 and the other end extending to the outside of the mounting platform 31 .

[0023] Turbine inlet pipe 34 and turbine outlet pipe 35 are fixed within the restraining tube 33. Their diameters are smaller than the inner diameter of the restraining tube, creating a gap between the tube walls and the outer walls of the two tubes. To prevent gas leakage, the gaps are filled with sealant, allowing gas to flow only through the two tubes. This ensures that gas flow between the mounting platform 31 cavity and the outside world is isolated and non-interfering.

[0024] See Figure 2 The turbine inlet pipe 34 and turbine outlet pipe 35, located at one end of the cavity of the mounting platform 31, are equipped with a first check valve 36 and a first solenoid valve 37, respectively. The first solenoid valve 37 is driven by a control system signal and is opened or closed by command. When the first solenoid valve 37 is open, the gas in the cavity of the mounting platform 31 can flow to the outside through the turbine outlet pipe 35. Due to the non-return principle of the first check valve 36, external air can only enter the cavity of the mounting platform 31 through the turbine inlet pipe 34 and fill the cavity of the wave energy accumulator 32, and cannot flow in the opposite direction. When the lower end of the wave energy accumulator 32 moves upward, the wave energy accumulator 32 compresses the air inside. The control system can choose whether the air enters the energy storage assembly 4 for storage or is discharged through the turbine outlet pipe 35. When the lower end of the wave energy accumulator 32 moves downward, the internal cavity expands, creating a negative pressure, and the outside air is replenished into the cavity of the wave energy accumulator 32 through the turbine inlet pipe 34.

[0025] The end surface area of ​​the turbine inlet pipe 34 is larger than that of the turbine outlet pipe 35. During exhaust, the gas in the turbine outlet pipe 35 generates a higher flow rate due to the pressure difference. Therefore, despite its smaller cross-sectional area, it can still achieve flow matching with the turbine inlet pipe 34. Controlling flow consistency ensures that the flow velocities and pressure gradients within the two pipes match, reducing airflow collisions caused by flow velocity differences. For example, when the intake flow rate is greater than the exhaust flow rate, excess gas may form vortices within the air turbine assembly, increasing flow resistance. This design ensures stable operation of the air turbine assembly. Furthermore, due to the smaller cross-sectional area of ​​the turbine outlet pipe 35, its location within the confinement pipe 33 ensures that its outlet is aligned with the edge of the air turbine assembly 38, described later. This reduces its proportion within the confinement pipe 33 cross-sectional area and reduces flow field disturbances caused by gas collisions.

[0026] See Figure 5 A self-rectifying air turbine 38 is located within the restraining tube 33 and outside the cavity of the mounting platform 31. Air turbine 38 is fixedly connected to the input shaft of generator A-310 via multiple brackets 39. Its rotation drives the generator shaft of generator A-310 to generate electricity.

[0027] The wind power generation component 2 includes the following structures: The wind turbine shaft 21 is rotatably connected to the floating energy island body 1, with its rotation axis perpendicular to the surface of the floating energy island body 1. A worm 25 is mounted on the wind turbine shaft 21, and the worm 25 rotates synchronously with the wind turbine shaft 21.

[0028] A generator B-22 is fixedly connected to the main body of the floating energy island 1, with a worm gear 24 mounted on its generator shaft. Vertical wind blades at the top of the wind turbine shaft 21 drive the wind turbine shaft 21 to rotate. The meshing of the worm gear 24 and worm 25 transmits the driving force to the generator shaft of the generator B-22, which then generates electricity.

[0029] The extension shaft 23 is fixedly mounted on the worm gear 24. It is coaxial with and fixedly connected to the generator shaft of generator B-22, rotating synchronously with the shaft. The end of the extension shaft 23, facing away from the generator B-22, extends into the cavity of the mounting platform 31 and the restraining tube 33. To ensure stable rotation of the extension shaft 23 within the restraining tube 33, a connecting sleeve 26 is sleeved on its outer side. The outer wall of the extension shaft 23 is connected to the inner wall of the connecting sleeve 26 via a bearing 27. The outer side of the connecting sleeve 26 is filled with the aforementioned sealant to prevent interference with the rotation of the extension shaft 23.

[0030] See Figure 5Ratchet 28 is fixedly connected to extension shaft 23, coaxial with extension shaft 23, and rotates therewith. A through hole 210 is defined in the center of air turbine assembly 38, and ratchet 28 is positioned within through hole 210. A pawl 29 is disposed on the inner wall of through hole 210. When ratchet 28 and extension shaft 23 rotate clockwise relative to air turbine assembly 38 as a whole, the ratchet groove of ratchet 28 abuts against pawl 29, locking the ratchet 28 and pawl 29 in engagement. When ratchet 28 and extension shaft 23 rotate counterclockwise relative to air turbine assembly 38 as a whole, the ratchet groove of ratchet 28 and pawl 29 disengage, resulting in an unlocked, free state.

[0031] The energy storage assembly 4 includes a set of low-pressure gas storage assemblies and a set of high-pressure gas storage assemblies. All air turbine power generation assemblies 3 are connected and communicated with the low-pressure gas storage assemblies. The low-pressure gas storage assemblies have the following structure: The low-pressure gas storage tank 41 is fixedly connected to the upper surface of the floating energy island body 1; The low-pressure air intake pipe 42 is fixedly connected to the mounting platform 31 at one end and communicates with its cavity. The other end is fixedly connected to and communicates with the low-pressure gas storage tank 41. A second solenoid valve 43 and a second check valve 44 are installed on the low-pressure air intake pipe 42 to open and close the low-pressure air intake pipe 42. The second solenoid valve 43 is also driven by a signal from the control system and is opened or closed by command. The second check valve 44 operates on the non-return principle, allowing only the compressed gas in the cavity of the mounting platform 31 to flow into the low-pressure gas storage tank 41 under pressure, effectively preventing the reverse flow of gas from the low-pressure gas storage tank 41 and ensuring the stability and safety of the low-pressure energy storage process.

[0032] The low-pressure outlet pipe 45 has one end fixedly connected to and in communication with the low-pressure gas storage tank 41, and the other end extends through the mounting platform 31 and is fixedly connected to and in communication with the turbine outlet pipe 35. The connection point between the low-pressure outlet pipe 45 and the turbine outlet pipe 35 is set as point O, which is located between the first solenoid valve 37 and the outlet end of the turbine outlet pipe 35. A third solenoid valve 46 is installed on the low-pressure outlet pipe 45. This valve is driven by a control system signal and opens or closes according to commands, thus opening and closing the low-pressure outlet pipe 45. This ensures that the gas in the low-pressure gas storage tank 41 is delivered to the air turbine along the specified path under different operating conditions. The turbine outlet pipe 35 is also equipped with a fifth one-way valve 47, located between point O and the outlet end of the turbine outlet pipe 35. Due to the non-return property of the fifth one-way valve 47, outside air cannot flow back through the turbine outlet pipe 35 to the wave energy pressure accumulator 32.

[0033] The high-pressure gas storage assembly includes the following structures: A high-pressure gas storage tank 48 is fixedly connected to the floating energy island body 1; One end of the first pressurized pipe 49 is fixedly connected to and communicates with the low-pressure gas storage tank 41. A fourth solenoid valve 410 and a third check valve 412 are mounted on the first pressurized pipe 49. The fourth solenoid valve 410 is also driven by a control system signal, opening or closing according to commands, thereby controlling the opening and closing of the first pressurized pipe 49. The third check valve 412 operates on a non-return principle, allowing only the compressed gas within the low-pressure gas storage tank 41 to flow into the first pressurized pipe 49 under pressure.

[0034] The air compressor 413 has a gas inlet fixedly connected to and communicated with the other end of the first pressurized pipe 49 , which increases the gas pressure level through mechanical compression to provide power for high-pressure energy storage.

[0035] One end of the second pressurized pipe 414 is fixedly connected to the gas outlet of the air compressor 413, and the other end is fixedly connected to the high-pressure gas storage tank 48 and communicates with its cavity. A fourth check valve 415 is installed on the second pressurized pipe 414. Due to the dual check valve characteristics of the third and fourth check valves 412 and 415, the air compressor 413 can only pressurize air from the low-pressure gas storage tank 41 into the high-pressure gas storage tank 48 through the first and second pressurized pipes 49 and 414, ensuring a unique gas transmission path and the safety of the energy storage process.

[0036] High-pressure return pipe 416 is fixedly connected to and communicates with high-pressure gas tank 48 at one end and with low-pressure gas tank 41 at the other. High-pressure return pipe 416 is equipped with a fifth solenoid valve 417 and a sixth check valve 418. The fifth solenoid valve 417 is also driven by a control system signal, opening or closing according to commands, thereby controlling the opening and closing of high-pressure return pipe 416. Due to the non-return function of the sixth check valve 418, gas in high-pressure gas tank 48 can only enter low-pressure gas tank 41 through high-pressure return pipe 416.

[0037] The usage status of this solution includes the following: The first state: non-energy storage state.

[0038] In this state, the control system closes the second electromagnetic valve 43 , the third electromagnetic valve 46 , the fourth electromagnetic valve 410 , and the fifth electromagnetic valve 417 , and only opens the first electromagnetic valve 37 .

[0039] When the wave energy pressure storage airbag 32 moves upward to compress the air in its cavity, the air is discharged to the outside from the turbine outlet pipe 35 through the air turbine device 38. The air turbine device 38 rotates due to the air flow and drives the generator A-310 to generate electricity.

[0040] When the wave energy pressure accumulator 32 moves downward, creating negative pressure, ambient air passes through the air turbine 38, where the airflow also drives the turbine 38 to generate electricity. The independent air passages for the turbine inlet 34 and outlet 35 avoid the turbulence caused by the shared air passage at the turbine 38 in conventional technology.

[0041] The second state: low-voltage energy storage state.

[0042] The control system closes the first solenoid valve 37 , the third solenoid valve 46 , the fourth solenoid valve 410 , and the fifth solenoid valve 417 , and only opens the second solenoid valve 43 .

[0043] When the wave energy pressure storage airbag 32 moves upward to compress the air in its cavity, since the pressure in the airbag is higher than the pressure in the low-pressure gas storage tank 41 , the airbag presses the gas into the low-pressure gas storage tank 41 for storage.

[0044] When the wave energy accumulator 32 moves downward, creating negative pressure, ambient air enters the accumulator cavity through the air turbine 38 in the restraining tube 33 and the turbine inlet pipe 34, driving the air turbine 38 to rotate and generate electricity. Compared to the first state, this state stores the energy generated by the upward compression of the wave energy accumulator 32 as compressed air in the low-pressure air tank 41. The low-pressure air tank 41 contains a pressure monitoring element, which is monitored by the control system. During inflation, if the pressure of the pressure monitoring element in the low-pressure air tank 41 exceeds the upper threshold set by the control system, the control system simultaneously closes the third solenoid valve 46 and the second solenoid valve 43, halting further inflation of the low-pressure air tank 41 and preventing overpressure.

[0045] When low-pressure gas storage tank 41 needs to release energy, the control system opens third solenoid valve 46 and closes first solenoid valve 37, fourth solenoid valve 410, fifth solenoid valve 417, and second solenoid valve 43. The pressure within low-pressure gas storage tank 41 is used to force gas through turbine outlet pipe 35 and into air turbine device 38 within turbine outlet pipe 35, thereby generating electricity. During the release process, if the pressure of the pressure monitoring element within low-pressure gas storage tank 41 falls below the low threshold set in the control system, the control system simultaneously closes third solenoid valve 46 and second solenoid valve 43, halting further release.

[0046] The third state: coordinated state of high-voltage energy storage and power generation.

[0047] When the control system monitors that the pressure in the low-pressure gas storage tank 41 is at the high threshold value in the second state, the control system controls the first solenoid valve 37 and the fourth solenoid valve 410 to open and the air compressor 413 to operate. The second solenoid valve 43, the third solenoid valve 46, and the fifth solenoid valve 417 remain closed. The air compressor 413 pumps gas from the low-pressure gas storage tank 41 into the high-pressure gas storage tank 48 until the pressure in the low-pressure gas storage tank 41 reaches the low threshold value in the second state. At this point, the control system stops the air compressor 413 and closes the fourth solenoid valve 410, the second solenoid valve 43, the third solenoid valve 46, and the fifth solenoid valve 417. The high-pressure gas storage tank 48 also contains a pressure monitoring element. When the pressure exceeds the high-pressure threshold value set in the control system, the control system closes the fourth solenoid valve 410 and stops further air filling.

[0048] During the process of storing gas in the high-pressure gas storage tank 48, since the first solenoid valve 37 is still in the open state, the first state can be operated synchronously.

[0049] When the high-pressure gas tank 48 needs to release energy, the control system closes the first, second, and fourth solenoid valves 37, 43, and 410, and opens the fifth and third solenoid valves 417 and 46. Using the pressure within the high-pressure gas tank 48, the gas is drawn from the high-pressure gas tank 48 through the high-pressure return pipe 416 into the low-pressure gas tank 41. The gas then flows through the low-pressure outlet pipe 45 to the air turbine 38 in the restraining tube 33, generating electricity. The low-pressure gas tank 41 acts as a buffer to prevent the high-pressure gas in the high-pressure gas tank 48 from directly impacting the air turbine and causing it to exceed the speed limit. After the pressure is reduced by the low-pressure gas tank 41, the air turbine maintains a speed range that satisfies the power generation efficiency. During the release process, if the pressure falls below the low-pressure threshold set by the control system, the control system closes the fourth and fifth solenoid valves 410 and 417.

[0050] See Figure 6 Affected by the structural stress characteristics, the rotation direction of the self-rectifying air turbine device 38 is constant in the clockwise direction as shown in FIG6 , and the rotation direction of the ratchet wheel 28 driven by the vertical axis wind power generation is also clockwise.

[0051] When the speed of the air turbine 38 is lower than that of the ratchet 28, the ratchet groove of the ratchet 28 engages the pawl, and the wind turbine accelerates the air turbine 38 through the ratchet, bringing it into the efficient power generation speed range. When the speed of the air turbine 38 is higher than that of the ratchet 28, the two generate power independently without affecting each other. Due to the high design speed of the air turbine 38 blades, its normal operating speed exceeds that of the ratchet 28. However, during the startup phase, its speed is lower than the speed of the ratchet 28 driven by the wind turbine. At this time, the ratchet 28 drives the air turbine 38 to accelerate, quickly bringing it into the optimal operating speed range and improving power generation efficiency.

[0052] Specifically: When the wind energy is high and the wave energy is low, the air turbine speed is insufficient (not reaching the high power generation efficiency range). At this time, the ratchet speed is fast, the ratchet pawl is locked, and the wind energy passes through the ratchet to speed up the air turbine, maintaining its high power generation efficiency speed range. When the wind energy is low and the wave energy is high, the air turbine device reaches the target speed (in the high power generation efficiency range) under the action of wave energy, the ratchet pawl is unlocked, and the two generate electricity independently; When both wind energy and wave energy are large and the air turbine speed is greater than the ratchet speed, the air turbine is already in a high power generation efficiency range under the action of wave energy, and both generate electricity independently; When both wind and wave energy are low, the air turbine 38 cannot maintain a high-efficiency speed range. In this case, the compressed stored energy is released to drive the unit, stabilizing it within a reasonable speed range. This design ensures the power generation efficiency of the air turbine 38 and avoids energy loss.

[0053] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. An energy island for compressed air energy storage, characterized in that: Includes the following structures: The main body of the floating energy island; Multiple modular power generation units are installed on the main body of the floating energy island; the multiple modular power generation units include wind power generation components, air turbine power generation components and energy storage components; The air turbine power generation assembly includes the following structures: An air turbine device has a through hole formed in its center. The air turbine device is connected to the generator shaft of the generator A. Under the wave energy, the air turbine device drives the generator A to rotate and generate electricity. The wind power generation component includes the following structures: The extension shaft is rotated by wind power; the extension shaft is connected to the generator shaft of generator B, and the extension shaft drives the generator B to rotate and generate electricity under the wind energy; The ratchet is located in the through hole and is fixedly connected to the extension shaft; a pawl is provided in the through hole; when the rotation speed of the extension shaft is higher than the rotation speed of the air turbine device, the ratchet and the pawl are in a locked state; when the rotation speed of the extension shaft is lower than the rotation speed of the air turbine device, the ratchet and the pawl are in a non-locked free state.

2. The energy island for compressed air energy storage according to claim 1, characterized in that: The air turbine power generation assembly also includes: a mounting platform, a wave energy pressure storage airbag, a turbine inlet pipe and a turbine outlet pipe. A cavity is provided inside the mounting platform, and the turbine inlet pipe and the turbine outlet pipe are both sheathed with restraint pipes. One end of the turbine inlet pipe and the turbine outlet pipe are connected to the mounting platform cavity, and the other end faces the air turbine device. The internal airway of the wave energy pressure storage airbag is connected to the mounting platform cavity, which can change the pressure in the mounting platform cavity under the fluctuation of waves, so that the gas flows through the turbine inlet pipe and the turbine outlet pipe. The extension shaft is passed through the restraint pipe, and a connecting sleeve is sheathed on the extension shaft. The inner wall of the connecting sleeve is connected to the outer wall of the extension shaft by a bearing. The outer wall of the connecting sleeve, the outer wall of the turbine inlet pipe, the outer wall of the turbine outlet pipe and the inner wall of the restraint pipe are filled with sealant.

3. The energy island for compressed air energy storage according to claim 1, characterized in that: The wind power generation component also includes: a wind turbine shaft, a vertical axis fan blade is installed on the top of which, a worm is installed on the bottom, and a worm wheel is installed on the extension shaft. Through the cooperation of the worm wheel and the worm, the vertical axis fan blade transmits wind force to the extension shaft, causing the extension shaft to rotate.

4. The energy island for compressed air energy storage according to claim 3, characterized in that: The wind power generation component further includes: the energy storage component includes a low-voltage energy storage component, and the low-voltage energy storage component includes the following structure: The low-pressure gas storage tank is fixedly installed on the upper surface of the floating energy island; A low-pressure air inlet pipe, one end of which is fixedly connected to the mounting platform and communicates with the cavity thereof, and the other end of which is fixedly connected to and communicates with the low-pressure air storage tank. The low-pressure air inlet pipe is equipped with a second solenoid valve and a second one-way valve. Due to the one-way conduction characteristic of the second one-way valve, air can only enter the low-pressure air storage tank from the low-pressure air inlet pipe. One end of the low-pressure outlet pipe is fixedly connected to and communicated with the low-pressure gas storage tank, and the other end passes through the mounting platform and is fixedly connected to and communicated with the turbine outlet pipe. The connection point between the low-pressure outlet pipe and the turbine outlet pipe is set as point O, then point O is located between the first solenoid valve and the outlet end of the turbine outlet pipe; the first solenoid valve is installed at point O of the turbine outlet pipe and the end close to the wave energy pressure storage airbag.

5. The energy island for compressed air energy storage according to claim 4, characterized in that: The energy storage assembly further includes a high-pressure gas storage assembly, which includes the following structure: High-pressure gas storage tank, fixedly connected to the main body of the floating energy island; A first pressurizing pipe, one end of which is fixedly connected to and communicates with the low-pressure gas storage tank; a fourth solenoid valve and a third one-way valve are mounted on the first pressurizing pipe; An air compressor, wherein the gas inlet is fixedly connected to and communicates with the other end of the first pressurized pipe, and the gas outlet at the other end is fixedly connected to and communicates with the high-pressure gas storage tank through the second pressurized pipe; The high-pressure return air pipe has one end fixedly connected to and communicated with the high-pressure gas storage tank and the other end fixedly connected to and communicated with the low-pressure gas storage tank. The high-pressure return air pipe is equipped with a fifth solenoid valve.

6. The energy island for compressed air energy storage according to claim 4, characterized in that: The turbine inlet pipe and the turbine outlet pipe are respectively installed with a first one-way valve and a fifth one-way valve; based on the one-way conduction principle of the first one-way valve, external gas can enter the installation platform cavity from the turbine inlet pipe; based on the one-way conduction principle of the fifth one-way valve, the air in the installation platform cavity can flow from the turbine outlet pipe to the outside.

7. The energy island for compressed air energy storage according to claim 4, characterized in that: The end surface area of ​​the turbine inlet pipe is larger than the end surface area of ​​the turbine outlet pipe.

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