Wave energy capture and storage system for offshore wind power generation jacket foundation

Abstract

To provide a wave energy capture and storage system for an offshore wind power generation jacket foundation that realizes dispersion type energy storage, and saves a storage facility and a space.SOLUTION: A wave energy capture and storage system for an offshore wind power generation jacket foundation comprises a wind power generation module and a wind power generation jacket foundation, and also includes a wave energy acquisition system, a hydraulic system, an energy storage system, a pressure medium internal energy conversion device, and an expansion generator system.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to the technical field of offshore wind power generation, and in particular to a wave energy capture and storage system for offshore wind power generation jacket foundations. [Background technology]

[0002] Based on offshore wind power generation, the development of a comprehensive energy utilization device that combines wind and wave power is in line with the current technological prospects for the comprehensive development of composite energy, and is a measure to realize the mutual complementation of energy strengths, break through the technical bottleneck in large-scale utilization, and enhance the demonstration effect of construction. There is a strong interrelationship between offshore wind energy and wave energy. In areas with abundant offshore wind energy resources, wave energy resources are also relatively abundant, so wind and wave combined power generation has a particularly favorable advantage. In addition, in the process of wind and wave combined development, it is possible to realize the sharing of offshore support structures, power transmission equipment, and power management. Since there are extremely large constraints on the increase of capital investment, promoting the complementary development model of "offshore wind energy + wave energy" is of great significance in promoting the sustainable development of marine resources in China. In addition, because wave energy is highly random, the directly output electrical energy has high variability. Therefore, how to achieve efficient storage and stable output of the captured wave energy is an important technical challenge facing the development of wave energy.

[0003] In order to meet the needs of the development of a new type of power system that is mainly based on new energy, there is an urgent need to promote energy storage on the offshore wind power generation side nationwide and clarify the standards for energy storage and grid connection to solve the power supply and demand problem in offshore wind power generation and improve the safe and reliable operation level of the power system. Therefore, each province and city is successively putting forward policies and requirements regarding the proportion of new energy storage.

[0004] By collecting wave energy through energy storage, it is possible to realize stable output of wave power generation. In the future, by applying this to multiple turbine foundations of offshore wind power plants, it will be possible to realize a certain scale of increased installed capacity. The combination of wave power generation and energy storage is expected to replace conventional energy storage and subsidize the energy storage ratio of offshore wind power generation, leading to a reduction in investment in offshore wind power plants.

[0005] Patent Document 1 discloses an offshore wind power generation system using compressed air energy storage to solve the technical problem of grid-connected peak adjustment in conventional offshore wind power generation. The wave energy collection module of the system is fixedly connected to a jacket foundation. The wave energy collection module includes a plurality of elastically deformable energy collection air bags. The energy collection air bags communicate with an energy storage gas tank through an air injection pipe. The air injection pipe is provided with a first air supply check valve that allows air to flow from the energy collection air bags to the energy storage gas tank. However, in this case, the number of required energy storage units and equipment increases, and there is a limit to the energy that can be stored in the air bags. In addition, the expansion and contraction of the air bags shortens the life of the air bags in poor environments. In addition, the equipment requires a lot of maintenance work, the energy storage cost increases, and the efficiency of energy storage and conversion is low, resulting in large losses.

[0006] Patent Document 2 discloses an energy storage integrated power generation system that utilizes tidal, wave and wind energy. The system utilizes tidal and wave energy by driving an air compressor generator using the change in seawater level. However, due to the lack of effective technical means for storage and large-scale conversion, it is unable to solve the problems of storage cost, inability to start power generation when internal energy is too low, or inability to meet the minimum requirements for utilization and development due to insufficient storage of converted energy.

[0007] The above-mentioned conventional techniques are not capable of realizing the effective utilization and development of wave energy capture and storage in the jacket foundation of offshore wind power generation, and are also not capable of continuously or stepwise converting wave energy. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] China Patent Application Publication No. 116146424A [Patent Document 2] China Patent Application Publication No. 110206679A Summary of the Invention [Problem to be solved by the invention]

[0009] In view of the above, in response to the problems of the prior art, the object of the present invention is to provide a wave energy capture and storage system for an offshore wind power jacket foundation that realizes distributed energy storage and saves storage equipment and space. The system captures wave energy, converts mechanical energy into the internal energy of the medium, then converts the internal energy of the medium into mechanical energy, and then converts the mechanical energy back into the internal energy of the gas medium. It is also possible to directly convert mechanical energy into electrical energy. After converting mechanical energy into the internal energy of the gas medium, it is possible to store the gas medium in question. In addition, when there is a shortage of mechanical energy for power generation, it is also possible to continue supplying the gas medium to store energy, and to generate power again after energy storage. Such stepwise energy storage and release / conversion improves the utilization rate. In addition, distributed storage allows the offshore wind power jacket foundation to be fully utilized for storing the gas medium. [Means for solving the problem]

[0010] In order to achieve the above and other related objects, the present invention provides a wave energy capture and storage system for an offshore wind power jacket foundation. The wave energy capture and storage system for an offshore wind power jacket foundation includes a wind power module and a wind power jacket foundation, and also includes a wave energy capture system, a hydraulic system, an energy storage system, a pressure medium internal energy conversion device, and an expansion generator system. The wave energy capture system includes an energy capture float and a swing rod. The energy capture float floats on the water surface and swings the swing rod up and down under the action of its own weight, buoyancy, and wave force. The swing rod is connected to the hydraulic system. The hydraulic system includes a pressure medium storage container and a swing medium compression mechanism. The swinging swing rod acts on the hydraulic system to drive the swing medium compression mechanism of the hydraulic system. The hydraulic system is used to convert the mechanical energy of the swing of the swing rod into the internal energy of a primary pressure medium. The swing medium compression mechanism of the hydraulic system delivers a primary pressure medium to a pressure medium storage container and / or a transport pipeline. A pressure medium internal energy converter is connected to the transport pipeline. The pressure medium internal energy converter converts the internal energy of the primary pressure medium into mechanical energy, and then converts the mechanical energy into internal energy of a secondary pressure medium. The pressure medium internal energy converter delivers the secondary pressure medium to the storage pipeline and / or the expansion generator system. The storage pipeline is used to store the secondary pressure medium. The delivery end of the storage pipeline is connected to the expansion generator system. The expansion generator system is used to convert the internal energy of the secondary pressure medium into mechanical energy. The expansion generator system converts the acquired mechanical energy into electrical energy and outputs it.

[0011] The technical content provided by the present invention further has the following technical features.

[0012] Preferably, the interior space of the jacket main chord is used to store the secondary pressure medium.

[0013] Preferably, the energy storage system is provided in a distributed manner. The energy storage system includes the storage pipeline.

[0014] Preferably, the energy storage system includes a pressure medium storage vessel.

[0015] Preferably, the storage pipeline is disposed inside the jacket main chord. Adjacent storage pipelines are parallel to each other. That is, each storage pipeline is individually connected to the pressure medium internal energy conversion device, and each storage pipeline is individually connected to the expansion generator system. An independent valve is connected to each of the inlet and outlet ends of the storage pipeline. The valve is used to control the injection or discharge of the secondary pressure medium into or from the storage pipeline.

[0016] Preferably, the swing rod includes a vertical swing rod, a horizontal swing rod, and a delivery swing rod. The vertical swing rod, the horizontal swing rod, and the delivery swing rod, which are connected to the jacket main chord and the hydraulic system, form a four-bar link mechanism, whereby the vertical swing rod, the horizontal swing rod, and the delivery swing rod are driven by an energy acquisition float to swing back and forth.

[0017] Preferably, one end of the lateral swing rod is hinged to the center of the vertical swing rod, and the other end of the lateral swing rod is hinged to the jacket main chord. The energy capture float is connected to the lower end of the vertical swing rod. Also, the upper end of the vertical swing rod is hinged to one end of the delivery swing rod, and the other end of the delivery swing rod is connected to the hydraulic system.

[0018] Preferably, the platform is provided with a main chord ceiling hole at a ceiling position of the jacket main chord for connecting the transport pipeline to the storage pipeline. The storage pipeline is disposed inside the jacket main chord.

[0019] Preferably, the hydraulic system and the expansion generator system are installed outside the wind turbine tower, and the pressure medium internal energy conversion device is installed inside the wind turbine tower. The transport pipeline passes through the wind turbine tower and is connected to the pressure medium internal energy conversion device. The output end of the pressure medium internal energy conversion device is connected to the storage pipeline and / or the expansion generator system through the transport pipeline.

[0020] Preferably, there are at least two storage pipelines disposed in the jacket main chord, and among the storage pipelines, the delivery pipeline and the injection pipeline are independent of each other.

[0021] Preferably, there are at least two of the storage conduits in each of the jacket main chords, the storage conduits being connected to the jacket main chords via annular plates spaced apart to maintain a gap between adjacent annular plates.

[0022] The inner wall of the annular plate is connected to the outer wall of the storage pipeline. The outer wall of the annular plate is flush with the outer wall of the jacket main chord. One end of the jacket main chord has a protrusion that fits into the gap between the adjacent annular plates. Thus, the two jacket main chords are tightly connected after being engaged through the annular plate.

[0023] Preferably, the pressure medium internal energy conversion device is provided with a vibration damping device.

[0024] Preferably, a gap is provided between the jacket main chord and the storage pipeline, and the gap is filled with seawater.

[0025] Preferably, the hydraulic system and the expansion generator system are provided within a container.

[0026] Preferably, the electrical energy output from the wind power module and the expansion generator system is output via a grid-tied inverter and integrated in an AC bus cable inside the wind turbine.

[0027] Preferably, the wind turbine tower is mounted on the platform, and a jacket main chord is provided below the platform for supporting the platform, and a jacket brace is provided on the jacket main chord.

[0028] Preferably, the expansion generator system includes an expansion device and a generator.

[0029] Preferably, the primary pressure medium is a gas or liquid and the secondary pressure medium is a gas.

[0030] Preferably, the hydraulic system includes a piston, a cylinder, and a valve, and the piston generates pressure in an air cylinder or a hydraulic cylinder by rocking motion, which acts on the primary pressure medium to deliver the primary pressure medium.

[0031] Preferably, the hydraulic system is a swing compressor, compressing gas or liquid by a swinging motion. The hydraulic system is not only capable of compressing liquids, but can also be used to compress gases.

[0032] The operating principle of the hydraulic system is as follows.

[0033] Swinging piston: A swing compressor has one swinging piston, which is connected to a drive mechanism, such as a wave energy capture system, to initiate a reciprocating motion.

[0034] Suction of medium: In one movement stage of the rocking piston, the medium is sucked into the cylinder of the compressor. The rocking motion causes the volume of the cylinder to increase, which reduces the pressure of the medium in the cylinder and sucks in the outside medium.

[0035] Compression of the gas: With each successive movement of the oscillating piston, the volume of the cylinder gradually decreases and the medium is compressed. This compression process increases the pressure of the medium.

[0036] Discharge of high pressure media: The compressed high pressure media is used to drive, transform or deliver gas to a target area.

[0037] Circulation process: The compressor continues to oscillate, causing the medium to circulate and be pumped out.

[0038] The operating principle of the expansion generator system is as follows.

[0039] Expansion device: A device that contains a container or line filled with high pressure gas. The gas may be obtained from an external compression system or may be generated by a chemical reaction. In the present invention, gas is injected from the outside.

[0040] Expansion Process: When a high pressure gas flows from an area of ​​high pressure to an area of ​​low pressure through a device such as a nozzle or valve, the gas expands. During the expansion process, the gas increases in volume and simultaneously decreases in temperature.

[0041] Driving a generator: The kinetic energy of the gases produced during the expansion process is used to drive a generator. During the expansion process, the gases are forced to rotate through a turbine or impeller. This rotational motion is mechanically converted to rotational motion in the rotor of a generator, producing an electric current.

[0042] Electrical energy generation: The mechanical energy generated by the motion of the rotor of the generator is converted into electrical energy, which may be directly output for power supply or may be stored in a battery for later use.

[0043] Preferably, the pressure medium internal energy conversion device includes a hydraulic motor and an air compressor. The hydraulic motor is used to convert hydraulic energy into mechanical motion. The mechanical motion includes rotational motion. The air compressor is used to convert mechanical energy into gas internal energy. The mechanical motion causes a mechanical structure of the air compressor to act on the secondary pressure medium, thereby increasing the internal energy of the secondary pressure medium. Effect of the Invention

[0044] The beneficial effects of the present invention are as follows:

[0045] Compared to the prior art, the present invention converts continuous wave-induced oscillations into pressure energy, which is then gradually released, completing a continuous cycle of absorbing wave energy, converting it into pressure energy, storing the pressure energy, and converting it into electrical energy by releasing the pressure energy, and outputting it. Therefore, in addition to a high utilization rate of wave energy, the storage and release are completed in stages, making it effective for converting electrical energy and outputting it to a grid.

[0046] In the present invention, the conventional space in the jacket foundation is used as a gas storage chamber, that is, the internal space of the jacket main chord is used to store the secondary pressure medium. By making it possible to store the internal energy of the secondary pressure medium in this way and making effective use of conventional equipment, the number of energy storage devices can be reduced, and resources can be saved.

[0047] (1) The jacket foundation is the most economical and safe form of fixed foundation for offshore wind power generation in Japan's deep sea wind energy resource development. This structure is widely used, but the present invention makes it possible to realize its large-scale dissemination and use based on this structure. In this invention, by slightly modifying the conventional jacket foundation for offshore wind power generation, a device has been developed that integrates offshore wind energy and wave energy. This realizes the sharing of the foundation support structure and minimizes the destruction of the conventional support structure, ensuring the safety of the wind power generation structure.

[0048] (2) According to the present invention, the support structure for the wave power generation device using the jacket foundation realizes the integration of the wave power generation device with the foundation structure of the offshore wind turbine, thereby realizing hierarchical and three-dimensional development of marine energy, thereby improving the efficiency of energy development.

[0049] (3) According to the present invention, efficient storage and stable output in wave power generation are realized, thereby realizing large-scale development of wave energy.

[0050] (4) The present invention can be applied to the foundations of multiple offshore wind turbines to achieve a certain scale of installed capacity, thereby replacing the energy storage ratio of offshore wind power generation and reducing investment in energy storage.

[0051] (5) In the present invention, the cavity in the main chord of the jacket foundation is used as a gas storage space or an energy storage space, and a storage pipeline is installed in the main chord of the jacket as a gas storage facility. This avoids the economic and process investment required for constructing a separate compressed air storage room, and improves the value of conventional resources.

[0052] (6) According to the present invention, by providing a plurality of parallel storage pipelines as a pressure vessel, it becomes possible to realize any of the functions of "only injecting compressed air, only discharging compressed air, and both injecting and discharging compressed air."

[0053] (7) In the present invention, the annular plate connecting the jacket main chord and the storage pipeline maintains a gap, which is advantageous for uniform temperature transfer.

[0054] (8) In the present invention, the gap between the main chord of the jacket and the storage pipeline is filled with seawater, so that the difference in seawater pressure in the deep water area can be balanced.

[0055] (9)The hydraulic system and expansion generator system are located inside the container, and the hydraulic motor-air compressor system is located inside the tower, which effectively avoids corrosion in the marine environment.

[0056] (10) The electrical energy output from the hydraulic system and the expansion generator system is output via a grid-connected inverter, integrated with an AC bus cable inside the wind turbine, and output together with the electricity generated by the wind power generation system. This makes it possible to share the power output facilities for wave power generation and wind power generation, thereby reducing investment. [Brief description of the drawings]

[0057] [Figure 1] FIG. 2 is a perspective view of the structure of a wave energy capture and storage system for an offshore wind power generation jacket foundation in the present invention. [Diagram 2] FIG. 2 is a plan view of a wave energy capture and storage system for an offshore wind power jacket foundation according to the present invention. [Diagram 3] FIG. 2 is a perspective view of a reinforcing structure of a wave energy capture and storage system for an offshore wind power generation jacket foundation in the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0058] Hereinafter, specific embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Note that these embodiments are merely for the purpose of explaining the present invention and are not intended to limit the present invention.

[0059] In the description of the present invention, the directions or positional relationships indicated by terms such as "center", "vertical", "horizontal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "ceiling", "bottom", "inside", and "outside" are merely for convenience and simplification of the description of the present invention, and do not expressly or imply that the target device or member has a specific direction and must be constructed and operated in a specific direction. Therefore, they should not be construed as limiting the present invention. In addition, the terms "first" and "second" are merely for convenience of description, and should not be construed as expressing or implying relative importance.

[0060] It should be noted that in the description of the present invention, unless otherwise clearly defined and limited, the terms "attach", "connect" and "connect" should be interpreted broadly. For example, it may be a fixed connection, a removable connection, or an integral connection. It may also be a mechanical connection or an electrical connection. It may also be a direct connection, an indirect connection via an intermediate medium, or an internal connection between two members. Those skilled in the art can interpret the specific meaning of the above terms in the present invention according to the specific situation.

[0061] Additionally, unless otherwise specified, in the description of the present invention, "plurality" means two or more than two.

[0062] As shown in Figs. 1 to 3, the wave energy capture and storage system for the offshore wind power jacket foundation includes a wind power generation module and a wind power generation jacket foundation, as well as a wave energy capture system, a hydraulic system 8, an energy storage system, a pressure medium internal energy conversion device 10, and an expansion generator system 2. The wave energy capture system includes an energy capture float 6 and a swing rod 7. The energy capture float 6 floats on the water surface and swings the swing rod 7 up and down by the action of its own weight, buoyancy, and wave force. The swing rod 7 is connected to a hydraulic system 8. The hydraulic system 8 includes a pressure medium storage container and a swing medium compression mechanism. The swinging swing rod 7 acts on the hydraulic system 8 to drive the swing medium compression mechanism of the hydraulic system 8. The hydraulic system 8 is used to convert the mechanical energy of the swing of the swing rod 7 into the internal energy of the primary pressure medium. The oscillating medium compression mechanism of the hydraulic system 8 delivers the primary pressure medium to a pressure medium storage container and / or a transport pipeline 9. A pressure medium internal energy converter 10 is connected to the transport pipeline 9. The pressure medium internal energy converter 10 converts the internal energy of the primary pressure medium into mechanical energy, and then converts the mechanical energy into internal energy of a secondary pressure medium. The pressure medium internal energy converter 10 delivers the secondary pressure medium to a storage pipeline 13 and / or an expansion generator system 2. The storage pipeline 13 is used to store the secondary pressure medium. The delivery end of the storage pipeline 13 is connected to the expansion generator system 2. The expansion generator system 2 is used to convert the internal energy of the secondary pressure medium into mechanical energy. The expansion generator system 2 converts the acquired mechanical energy into electrical energy and outputs it.

[0063] The present invention has the following characteristics. The energy acquisition float 6 is swung by utilizing waves, and the energy acquisition float 6 causes the swing rod 7 to act on the hydraulic system 8. Then, direct energy conversion is realized by the transport pipeline 9, the pressure medium internal energy converter 10, and the expansion generator system 2. After storing the pressure medium in a pressure medium storage container of the hydraulic system 8, conversion is realized by the transport pipeline 9, the pressure medium internal energy converter 10, and the expansion generator system 2. After sending out from the pressure medium internal energy converter 10, it may be stored in the storage pipeline 13, and after sufficient pressure energy is stored in the storage pipeline 13, power may be continuously generated.

[0064] The internal space of the jacket main chord 4 is used to store the secondary pressure medium. According to such storage requirements, the direct modification of the jacket main chord 4 is equivalent to making the jacket main chord 4 a connecting member and a pressure storage vessel.

[0065] The energy storage system is provided in a distributed manner. The energy storage system includes a storage pipeline 13. By storing the energy in a distributed manner in this manner, the storage space of a conventional offshore wind power jacket foundation can be fully utilized.

[0066] The energy storage system includes a pressure medium storage vessel, whereby not only the storage line 13 is the object of energy storage, but also the pressure medium storage vessel can serve as a storage vessel for buffering and storing the internal energy of the pressure medium during the transformation.

[0067] The storage pipelines 13 are disposed inside the jacket main chord 4. Adjacent storage pipelines 13 are arranged in parallel. That is, each storage pipeline 13 and the pressure medium internal energy converter 10 are individually connected to each other, and each storage pipeline 13 and the expansion generator system 2 are individually connected to each other. Independent valves are connected to the inlet and outlet ends of the storage pipes 13. The valves are used to control the inlet and outlet of the secondary pressure medium to and from the storage pipes 13. This configuration makes it possible to realize the following process. That is, each storage pipe 13 realizes individual storage and outlet. Storing the secondary pressure medium to increase the internal energy corresponds to storing the increased energy. Also, outletting the secondary pressure medium corresponds to releasing the stored energy. This is used to convert it into another form, such as mechanical energy, and finally output it as electrical energy.

[0068] The swing rod 7 includes a vertical swing rod 71, a horizontal swing rod 72, and a delivery swing rod 73. The vertical swing rod 71, the horizontal swing rod 72, and the delivery swing rod 73, which are connected to the jacket main chord 4 and the hydraulic system 8, form a four-bar link mechanism, so that the vertical swing rod 71, the horizontal swing rod 72, and the delivery swing rod 73 are driven by the energy acquisition float 6 to swing back and forth. This structure is simple and sturdy, is easy to realize, and is easy to maintain.

[0069] One end of the lateral swing rod 72 is hinged to the center of the vertical swing rod 71, and the other end of the lateral swing rod 72 is hinged to the jacket main chord 4. The energy acquisition float 6 is connected to the lower end of the vertical swing rod 71. In addition, the upper end of the vertical swing rod 71 is hingedly connected to one end of the delivery swing rod 73, and the other end of the delivery swing rod 73 is connected to the hydraulic system 8.

[0070] The platform 3 is provided with a main chord ceiling hole 11 at the position of the ceiling of the jacket main chord 4 for connecting the transport pipeline 9 to a storage pipeline 13. The storage pipeline 13 is disposed inside the jacket main chord 4.

[0071] The hydraulic system 8 and the expansion generator system 2 are installed outside the wind turbine tower 1, and the pressure medium internal energy converter 10 is installed inside the wind turbine tower 1. In addition, a transport pipeline 9 passes through the wind turbine tower 1 and is connected to the pressure medium internal energy converter 10. The discharge end of the pressure medium internal energy converter 10 is connected to the storage pipeline 13 and / or the expansion generator system 2 through the transport pipeline 9. This makes the layout reasonable and compact.

[0072] There are at least two storage pipelines 13 arranged in the jacket main chord 4. The delivery pipeline 9 and the injection pipeline 9 of each storage pipeline 13 are independent of each other. This is convenient for realizing independent control and use of each storage pipeline 13. That is, it is convenient for realizing any of the functions of only injecting the secondary pressure medium, only discharging the secondary pressure medium, and both injecting and discharging the secondary pressure medium.

[0073] At least two storage conduits 13 are provided within each jacket main chord 4. The storage conduits 13 are connected to the jacket main chord 4 via annular plates 14. The annular plates 14 are spaced apart to maintain a gap between adjacent annular plates 14.

[0074] The inner wall of the annular plate 14 is connected to the outer wall of the storage pipeline 13. The outer wall of the annular plate 14 is flush with the outer wall of the jacket main chord 4. One end of the jacket main chord 4 has a protrusion that fits into the adjacent gap of the annular plate 14. As a result, the two jacket main chords 4 are tightly connected after being engaged via the annular plate 14.

[0075] The conventional jacket main chord structure is fully utilized for the storage of the secondary pressure medium.

[0076] The pressure medium internal energy conversion device 10 is provided with a vibration damping device for reducing the influence of vibrations during operation of the pressure medium internal energy conversion device 10 on other surrounding equipment.

[0077] A gap is provided between the jacket main chord 4 and the storage pipeline 13, and seawater is filled in the gap. This is used to absorb excess heat in the process in which the secondary pressure medium is supplied to the storage pipeline 13, and to reduce the expansion of the jacket main chord 4 and the storage pipeline 13 due to temperature rise, thereby suppressing changes in the equipment capacity.

[0078] The hydraulic system 8 and the expansion generator system 2 are provided within the container.

[0079] The electrical energy output from the wind power generation module and expansion generator system 2 is output via a grid-connected inverter and integrated in an AC bus cable inside the wind turbine.

[0080] The wind turbine tower 1 is mounted on a platform 3. A jacket main chord 4 is provided below the platform 3 to support the platform 3. A jacket brace 5 is provided on the jacket main chord 4.

[0081] The expansion generator system 2 includes an expansion device and a generator.

[0082] The primary pressure medium is a gas or liquid and the secondary pressure medium is a gas.

[0083] The hydraulic system 8 includes a piston, a cylinder and a valve, and the piston generates pressure in an air cylinder or a hydraulic cylinder by rocking motion, which acts on a primary pressure medium and delivers the primary pressure medium.

[0084] The hydraulic system 8 is a swing compressor, and compresses gas or liquid by swinging motion. The hydraulic system 8 is not only capable of compressing liquid, but can also be used to compress gas.

[0085] The operating principle of the hydraulic system 8 is as follows.

[0086] Swinging piston: A swing compressor has one swinging piston, which is connected to a drive mechanism, such as a wave energy capture system, to initiate a reciprocating motion.

[0087] Suction of medium: In one movement stage of the rocking piston, the medium is sucked into the cylinder of the compressor. As the rocking motion increases the volume of the cylinder, the pressure of the medium in the cylinder decreases and the outside medium is sucked in.

[0088] Compression of the gas: With each step of the oscillating piston's movement, the volume of the cylinder gradually decreases and the medium is compressed. This compression process increases the pressure of the medium.

[0089] Discharge of high pressure media: The compressed high pressure media is used to drive, transform or deliver gas to a target area.

[0090] Circulation process: The compressor continues its oscillating motion, which causes the medium to circulate and be pumped out.

[0091] Specifically, the hydraulic system 8 is a swing compressor, and in the case where the medium is gas, the hydraulic system 8 compresses the gas by swinging motion.

[0092] The operating principle of the hydraulic system 8 is as follows.

[0093] Swinging piston: A swing compressor has one swinging piston, which is connected to a drive mechanism, such as a wave energy capture system, to initiate a reciprocating motion.

[0094] Gas intake: During one phase of the swinging piston's movement, gas is sucked into the gas cylinder of the compressor. The volume of the gas cylinder gradually increases due to the swinging motion, causing the pressure inside the gas cylinder to decrease and sucking in the outside gas.

[0095] Compression of the gas: With each step of the rocking piston's movement, the volume of the gas cylinder gradually decreases and the gas is compressed. This compression process increases the pressure of the gas.

[0096] Gas discharge: The compressed gas is discharged into the system, usually through a line to a condenser, where the gas gives up heat, cools and is converted to a liquid.

[0097] Cycling process: As the compressor continues to oscillate, the gas continues to be compressed and can be stored, pumped to a target area, or converted into mechanical energy.

[0098] Specifically, the operating principle of the expansion generator system 2 is as follows.

[0099] Expansion device: A device that contains a container or line filled with high pressure gas. The gas may be obtained from an external compression system or may be generated by a chemical reaction. In the present invention, gas is injected from the outside.

[0100] Expansion Process: When a high pressure gas flows from an area of ​​high pressure to an area of ​​low pressure through a device such as a nozzle or valve, the gas expands. During the expansion process, the gas increases in volume and simultaneously decreases in temperature.

[0101] Driving a generator: The kinetic energy of the gases during expansion is used to drive a generator. During expansion, the gases pass through a turbine or impeller, causing it to rotate. This rotational motion is mechanically converted to rotation of the rotor of a generator, producing an electric current.

[0102] Electrical energy generation: The mechanical energy generated by the motion of the rotor of the generator is converted into electrical energy, which may be directly output for power supply or may be stored in a battery for later use.

[0103] The pressure medium internal energy conversion device 10 includes a hydraulic motor and an air compressor. The hydraulic motor is used to convert hydraulic energy into mechanical motion. The mechanical motion includes rotational motion. The air compressor is used to convert mechanical energy into internal energy of gas. The mechanical motion acts on a secondary pressure medium through the mechanical structure of the air compressor to increase the internal energy of the secondary pressure medium.

[0104] Specifically, the present invention is realized as follows.

[0105] (1) On land, as shown in Fig. 1, the energy acquisition body structure, which is made up of the energy acquisition float 6, the horizontal swing rod 72, the vertical swing rod 71, and the delivery swing rod 73, is assembled to the jacket turbine foundation by welding. The jacket turbine foundation includes the platform 3, the jacket main chord 4, and the jacket brace 5.

[0106] (2) A jacket turbine foundation equipped with a wave energy capture device is installed at a designated location in a designated sea area.

[0107] (3) After completing the assembly of the hydraulic system 8 and the expansion generator system 2 on land, they are placed in separate containers and hoisted and installed in designated areas on the platform 3 of the offshore wind power jacket.

[0108] (4) Assemble and connect the hydraulic system 8 and the delivery swing rod 73 at the top of the wave energy capture system.

[0109] (5) Assemble the hydraulic motor-air compressor system of the pressure medium internal energy conversion device 10.

[0110] (7) Install the wind turbine tower 1 and the wind power generation module.

[0111] (8) Install the piping.

[0112] (9) Perform trial operation and adjustment of the wave energy capture system, hydraulic system 8, hydraulic motor-air compressor system, and expansion generator system 2.

[0113] The detailed operation principle in the specific embodiment is as follows. The float of the energy capture float 6 reciprocates up and down due to the action of wave force and gravity, causing the vertical rocking rod 71 to reciprocate up and down. Then, the horizontal rocking rod 72 rocks around the hinge connection point, and the delivery rocking rod 73 rocks in parallel with the horizontal rocking rod 72, causing the piston of the hydraulic system 8 to reciprocate, thereby delivering high-pressure oil or temporarily storing high-pressure oil. The high-pressure oil rotates the hydraulic motor of the hydraulic motor-air compressor system, which in turn operates the air compressor. The air compressor delivers compressed air into the storage pipeline 13 or other pressure vessel. Then, when each storage pipeline 13 or other pressure vessel reaches a predetermined pressure, the exhaust valve is opened and the high-pressure air is released, causing the expansion generator system 2 to operate. The electric energy output by this is output via the grid-connected inverter, integrated by a 400V AC bus cable inside the wind turbine, and output together with the electricity generated by the wind power generation system. The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make some modifications and replacements without departing from the technical principles of the present invention, and these modifications and replacements should also be considered as part of the scope of protection of the present invention. [Explanation of symbols]

[0114] 1. Wind Turbine Tower 2 Expansion generator system 3. Platform 4 Jacket main string material 5 Jacket Brace 6 Energy Acquisition Floats 7 Swing Rod 8. Hydraulic System 9 Transport pipeline 10 Pressure medium internal energy conversion device 11 Main chord ceiling hole 13 Storage Pipeline 14 Annular plate 71 Vertical swing rod 72 Horizontal swing rod 73 Delivery swing rod

Claims

1. 1. An offshore wind jacket foundation wave energy capture and storage system, comprising a wind power module and a wind jacket foundation, The present invention includes a wave energy capture system, a hydraulic system (8), an energy storage system, a pressure medium internal energy conversion device (10), and an expansion generator system (2), The wave energy capture system includes an energy capture float (6) and a swinging rod (7); The energy capture float (6) floats on the water surface and swings the swing rod (7) up and down by the action of its own weight, buoyancy and wave force, the swing rod (7) is connected to the hydraulic system (8), and the hydraulic system (8) includes a pressure medium storage container and a swing medium compression mechanism, The swinging swing rod (7) acts on the hydraulic system (8) to drive a swing medium compression mechanism of the hydraulic system (8), and the hydraulic system (8) is used to convert the mechanical energy of the swing of the swing rod (7) into the internal energy of a primary pressure medium; The fluctuating medium compression mechanism of the hydraulic system (8) delivers a primary pressure medium to the pressure medium storage container and / or the transport pipeline (9), stores the primary pressure medium in the pressure medium storage container of the hydraulic system (8), and then converts the primary pressure medium through the transport pipeline (9), the pressure medium internal energy converter (10), and the expansion generator system (2); The pressure medium internal energy converter (10) is connected to the transport pipeline (9), and the pressure medium internal energy converter (10) converts the internal energy of the primary pressure medium into mechanical energy, and then converts the mechanical energy into internal energy of a secondary pressure medium; The pressure medium internal energy conversion device (10) delivers the secondary pressure medium to a storage line (13) and / or to the expansion generator system (2); The storage line (13) is used for storing a secondary pressure medium, and the delivery end of the storage line (13) is connected to an expansion generator system (2); The wave energy capture and storage system for an offshore wind power jacket foundation is characterized in that the expansion generator system (2) is used to convert the internal energy of the secondary pressure medium into mechanical energy, and the expansion generator system (2) converts the acquired mechanical energy into electrical energy and outputs it.

2. The energy storage system is provided in a distributed manner, The wave energy capture and storage system for offshore wind jacket foundations according to claim 1, characterized in that the energy storage system includes the storage pipeline (13).

3. The storage pipeline (13) is disposed inside the jacket main chord member (4), and adjacent storage pipelines (13) are arranged in parallel with each other, and each storage pipeline (13) and the pressure medium internal energy conversion device (10) are individually connected to each other; The wave energy capture and storage system for an offshore wind power jacket foundation as described in claim 2, characterized in that the storage pipeline (13) and the expansion generator system (2) are individually connected, and an independent valve is connected to each of the injection end and the discharge end of the storage pipeline (13), and the valve is used to control the injection of the secondary pressure medium into the storage pipeline (13) and the discharge of the secondary pressure medium from the storage pipeline (13).

4. The swing rod (7) includes a vertical swing rod (71), a horizontal swing rod (72), and a delivery swing rod (73), the vertical swing rod (71), the horizontal swing rod (72), and the delivery swing rod (73), which are connected to the jacket main chord (4) and the hydraulic system (8), form a four-bar link mechanism, so that the vertical swing rod (71), the horizontal swing rod (72), and the delivery swing rod (73) are driven by the energy acquisition float (6) to swing back and forth; One end of the horizontal swing rod (72) is hinged to the center of the vertical swing rod (71), and the other end of the horizontal swing rod (72) is hinged to the jacket main chord (4); The wave energy capture and storage system for offshore wind jacket foundation as described in claim 1, characterized in that the energy capture float (6) is connected to the lower end of the vertical swing rod (71), the upper end of the vertical swing rod (71) is hingedly connected to one end of the output swing rod (73), and the other end of the output swing rod (73) is connected to the hydraulic system (8).

5. The hydraulic system (8) and the expansion generator system (2) are provided outside the wind turbine tower (1); The pressure medium internal energy conversion device (10) is provided inside the wind turbine tower (1), The transport pipeline (9) passes through the wind turbine tower (1) and is connected to the pressure medium internal energy conversion device (10); The wave energy capture and storage system for an offshore wind jacket foundation according to claim 1, characterized in that the delivery end of the pressure medium internal energy conversion device (10) is connected to the storage pipeline (13) and / or the expansion generator system (2) through the transport pipeline (9).

6. The wave energy capture and storage system for an offshore wind jacket foundation according to claim 3, characterized in that there are at least two storage pipelines (13) arranged in each of the jacket main chords (4), and the transport pipelines (9) for sending out and the transport pipelines (9) for injecting into each of the storage pipelines (13) are independent of each other.

7. The storage pipeline (13) is connected to the jacket main chord (4) through annular plates (14), the annular plates (14) being spaced apart to maintain a gap between adjacent annular plates (14); The inner wall of the annular plate (14) is connected to the outer wall of the storage pipeline (13), the outer wall of the annular plate (14) is flush with the outer wall of the jacket main chord (4), and one end of the jacket main chord (4) has a protrusion that fits into the gap between adjacent annular plates (14); The wave energy capture and storage system for offshore wind jacket foundations according to claim 6, characterized in that the two jacket main chords (4) are tightly connected after being abutted via the annular plate (14).

8. The pressure medium internal energy conversion device (10) is provided with a vibration damping device, and a gap is provided between the jacket main chord (4) and the storage pipe (13), and the gap is filled with seawater; The hydraulic system (8) and the expansion generator system (2) are installed in a container, and the electrical energy output from the wind power generation module and the expansion generator system (2) is output via a grid-connected inverter and integrated with an AC bus cable inside the wind turbine; A wind turbine tower (1) is mounted on a platform (3), and a jacket main chord (4) is provided below the platform (3) for supporting the platform (3); The jacket main chord (4) is provided with a jacket brace (5), The expansion generator system (2) includes an expansion device and a generator, the primary pressure medium is a gas or a liquid, and the secondary pressure medium is a gas; The wave energy capture and storage system for an offshore wind jacket foundation according to any one of claims 1 to 7, characterized in that the hydraulic system (8) includes a piston, a cylinder, and a valve, and the piston generates pressure in the cylinder by a swinging motion, which acts on the primary pressure medium and delivers the primary pressure medium.

9. The pressure medium internal energy conversion device (10) includes a hydraulic motor and an air compressor; The hydraulic motor is used to convert hydraulic energy into mechanical motion, including rotational motion, and the air compressor is used to convert mechanical energy into gas internal energy; The wave energy capture and storage system for an offshore wind jacket foundation according to any one of claims 1 to 7, characterized in that the mechanical movement acts on the secondary pressure medium by causing the mechanical structure of the air compressor to act on the secondary pressure medium to increase the internal energy of the secondary pressure medium.

10. A wave energy capture and storage system for an offshore wind jacket foundation as described in any one of claims 4, 5 and 7, characterized in that the internal space of the jacket main chord (4) is used to store a secondary pressure medium, the energy storage system includes a pressure medium storage container, and the platform (3) is provided with a main chord ceiling hole (11) at the ceiling position of the jacket main chord (4) for connecting the transport pipeline (9) to the storage pipeline (13), and the storage pipeline (13) is arranged inside the jacket main chord (4).

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