Wave energy capture and storage system for offshore wind turbine jacket foundations

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 specifically to a wave energy capture and storage system for an offshore wind power jacket foundation.

Background Art

[0002] Developing a comprehensive energy utilization device that "combines wave power with wind power" based on offshore wind power generation is in line with the current technological prospect of comprehensive development of complex energy, realizes the mutual complementation of energy strengths, breaks through the technical bottleneck in large-scale utilization, and is a measure to strengthen the demonstration effect of the project. There is a strong correlation between offshore wind energy and wave energy. In areas with rich offshore wind energy resources, wave energy resources are also relatively rich, so combined wind and wave power generation has particularly favorable advantages. In addition, in the process of combined wind and wave power development, it is possible to realize the sharing of offshore support structures, power transmission devices and power management. Since there are extremely large constraints on the increase in equipment investment, promoting the complementary development model of "offshore wind energy + wave energy" has important significance in promoting the sustainable development of marine resources in our country. Also, due to the high randomness of wave energy, 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 problem faced by the development of wave energy.

[0003] In order to meet the development needs of a new power system mainly based on new energy, it is urgently required to promote energy storage on the offshore wind power side nationwide and clarify the standards for energy storage and grid connection, so as to solve the power supply and demand problems in offshore wind power generation and improve the safe and reliable operation level of the power system. Therefore, various provinces and municipalities have successively introduced policies and requirements regarding the proportion of new energy storage.

[0004] By collecting wave energy through energy storage, stable output from wave power generation becomes possible. In the future, applying this to the foundations of multiple turbines in offshore wind farms will enable a certain level of increased capacity. The integration of wave power generation and energy storage is expected to supplement the energy storage ratio of offshore wind power generation, replacing conventional energy storage, and lead to a reduction in investment in offshore wind farms.

[0005] Patent Document 1 discloses an offshore wind power generation system using compressed air energy storage to solve the technical problems of grid connection peak adjustment in conventional offshore wind power generation. The wave energy collection module of this system is fixedly connected to the jacket foundation. The wave energy collection module also includes a plurality of elastically deformable energy collection gas bags. The energy collection gas bags are in communication with an energy storage gas tank through an air injection pipeline. The air injection pipeline is also provided with a first air supply check valve that allows air to flow from the energy collection gas 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 amount of energy that can be stored in the gas bags. In addition, the expansion and contraction of the gas bags shortens the lifespan of the gas bags in poor environments. Furthermore, equipment maintenance is time-consuming, energy storage costs are high, and the efficiency of energy storage and conversion is low, resulting in large losses.

[0006] Patent Document 2 discloses an integrated energy storage and power generation system that utilizes tidal, wave, and wind energy. This system utilizes tidal and wave energy by driving an air compressor generator using changes in seawater level. However, it lacks effective technical means for storage and large-scale conversion, and therefore cannot solve problems such as storage costs, the inability to start power generation when the internal energy is too low, or the inability to meet the minimum requirements for utilization and development due to insufficient storage of converted energy.

[0007] The conventional technologies described above make it impossible to effectively utilize and develop the capture and storage of wave energy in offshore wind turbine jacket foundations, nor can they continuously or incrementally convert wave energy. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Chinese Patent Application Publication No. 116146424A Specification [Patent Document 2] Chinese Patent Application Publication No. 110206679A Specification [Overview of the Initiative] [Problems that the invention aims to solve]

[0009] In view of the above, the objective of the present invention is to provide a wave energy capture and storage system for offshore wind turbine jacket foundations that realizes distributed energy storage and saves storage equipment and space, in order to address the problems of the prior art. The system captures wave energy, converts the mechanical energy into internal energy of a medium, then converts the internal energy of the medium back into mechanical energy, and then converts the mechanical energy back into internal energy of a gas medium. It is also possible to directly convert the mechanical energy into electrical energy. After converting the mechanical energy into internal energy of a gas medium, the gas medium in that portion can be stored. Furthermore, if there is insufficient mechanical energy for power generation, it is possible to continue supplying the gas medium to store energy, and then generate power again after energy storage. The utilization rate is improved by such stepwise energy storage and release / conversion. In addition, distributed storage allows the offshore wind turbine jacket foundation to be fully utilized for gas medium storage. [Means for solving the problem]

[0010] To achieve the above-mentioned objectives and other related objectives, the present invention provides a wave energy capture and storage system for offshore wind turbine jacket foundations. The wave energy capture and storage system for offshore wind turbine jacket foundations includes a wind turbine module and a wind turbine 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. The wave energy acquisition system includes an energy acquisition float and an oscillating rod. The energy acquisition float floats on the water surface and, by the action of its own weight, buoyancy, and wave force, causes the oscillating rod to oscillate up and down. The oscillating rod is connected to the hydraulic system. The hydraulic system includes a pressure medium storage container and an oscillating medium compression mechanism. The oscillating oscillating rod acts on the hydraulic system to drive the oscillating medium compression mechanism of the hydraulic system. The hydraulic system is used to convert the mechanical energy of the oscillating rod into internal energy of a primary pressure medium. The oscillating medium compression mechanism of the hydraulic system delivers the primary pressure medium to a pressure medium storage container and / or a transport pipeline. A pressure medium internal energy conversion device is connected to the transport pipeline. The pressure medium internal energy conversion device converts the internal energy of the primary pressure medium into mechanical energy, and then converts the mechanical energy into the internal energy of the secondary pressure medium. The pressure medium internal energy conversion device 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 discharge 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 internal 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 container.

[0015] Preferably, the storage pipelines are located inside the main chords of the jacket, and adjacent storage pipelines are arranged in parallel. That is, each storage pipeline is individually connected to the internal energy conversion device of the pressure medium, and each storage pipeline is individually connected to the expansion generator system. Independent valves are connected to both the injection and discharge ends of the storage pipelines. These valves are used to control the injection or discharge of the secondary pressure medium into the storage pipelines.

[0016] Preferably, the oscillating rod includes a vertical oscillating rod, a horizontal oscillating rod, and a delivery oscillating rod. The vertical oscillating rod, the horizontal oscillating rod, and the delivery oscillating rod, which are connected to the jacket main chord and the hydraulic system, constitute a four-bar linkage mechanism, and the vertical oscillating rod, the horizontal oscillating rod, and the delivery oscillating rod are driven by an energy acquisition float to perform reciprocating oscillations.

[0017] Preferably, one end of the lateral oscillating rod is hinged to the central part of the vertical oscillating rod, and the other end of the lateral oscillating rod is hinged to the main chord of the jacket. The energy acquisition float is connected to the lower end of the vertical oscillating rod. The upper end of the vertical oscillating rod is hinged to one end of the delivery oscillating rod, and the other end of the delivery oscillating rod is connected to the hydraulic system.

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

[0019] Preferably, the hydraulic system and the expansion generator system are provided outside the wind turbine tower, and the pressure medium internal energy conversion device is provided inside the wind turbine tower. Further, the transport pipeline penetrates the wind turbine tower and is connected to the pressure medium internal energy conversion device. The delivery 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 of the storage pipelines arranged inside the jacket main chord members. And for each of the storage pipelines, the transport pipelines for delivery and injection are independent of each other.

[0021] Preferably, at least two of the storage pipelines are provided in each of the jacket main chord members. The storage pipeline is connected to the jacket main chord member through an annular plate. The annular plates are provided at intervals so that a gap is maintained 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 member. At one end of the jacket main chord member, a protrusion adapted to the adjacent gap of the annular plate is held. Thereby, after the two jacket main chord members are engaged through the annular plate, they are tightly connected.

[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 member and the storage pipeline, and the gap is filled with seawater.

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

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

[0027] Preferably, the wind turbine tower is provided on the platform. Below the platform, the jacket main chord for supporting the platform is provided. Jacket braces are provided on the jacket main chord.

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

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

[0030] Preferably, the hydraulic system includes a piston, a cylinder, and a valve. The piston generates pressure within an air cylinder or a hydraulic cylinder by means of a rocking motion, acting on the primary pressure medium to deliver the primary pressure medium.

[0031] Preferably, the hydraulic system is a swing compressor that compresses gas or liquid by means of a rocking motion. The hydraulic system is not only capable of compressing liquids but can also be used for compressing gases.

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

[0033] Rocking piston: The swing compressor has one rocking piston. The rocking piston is connected to a drive mechanism such as a wave energy acquisition system, for example, to initiate a reciprocating motion.

[0034] Suction of the medium: In one motion stage of the rocking piston, the medium is suctioned into the cylinder of the compressor. The rocking motion causes the volume of the cylinder to tend to increase, thereby reducing the pressure of the medium within the cylinder and suctioning in the external medium.

[0035] Gas compression: In another phase of the oscillating piston's motion, 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 medium: Compressed high-pressure medium is used for driving, conversion, or delivering gas to a target area.

[0037] Circulation process: As the compressor continues its oscillating motion, the medium is circulated and discharged.

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

[0039] Expansion device: Includes a single container or pipeline filled with high-pressure gas. The gas may be obtained from an external compression system or generated by a chemical reaction. In this invention, the gas is injected from an external source.

[0040] Expansion process: When high-pressure gas flows from a high-pressure area to a low-pressure area through a device such as a nozzle or valve, expansion occurs in the high-pressure gas. During the expansion process, the volume of the gas increases while its temperature decreases.

[0041] Generator drive: The kinetic energy of the gas generated during the expansion process is used to drive the generator. During the expansion process, the gas passes through a turbine or impeller, causing it to rotate. This rotational motion is mechanically converted into the rotational motion of the generator's rotor, generating an electric current.

[0042] Generation of electrical energy: The mechanical energy generated by the motion of the rotor of the generator is converted into electrical energy. This electrical energy may be output directly for power supply or 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, which includes rotational motion. The air compressor is used to convert mechanical energy into gas internal energy. The mechanical motion causes the mechanical structure of the air compressor to act on the secondary pressure medium, thereby increasing the internal energy of the secondary pressure medium. [Effects of the Invention]

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

[0045] Compared to conventional technologies, this invention ensures that continuous wave-induced oscillations are converted into pressure energy and then released in stages, completing a continuous cycle of wave energy absorption, conversion to pressure energy, storage of pressure energy, and conversion to electrical energy and output through the release of pressure energy. Therefore, it offers a high utilization rate of wave energy, and because storage and release are completed in stages, it is effective for electrical energy conversion and output to the grid.

[0046] In this invention, the conventional space in the jacket foundation is used as a gas storage chamber. That is, the internal space of the jacket's main chord is used for storing the secondary pressure medium. By making it possible to store the internal energy of the secondary pressure medium in this way and effectively utilizing 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 the development of deep-sea wind energy resources in Japan. Although this structure is widely used, the present invention makes it possible to achieve large-scale dissemination and utilization based on it. In the present invention, a device has been developed that integrates offshore wind energy and wave energy by slightly modifying the conventional offshore wind power generation jacket foundation. As a result, the support structure of the foundation is shared and the destruction of the conventional support structure is minimized, thus ensuring the safety of the wind power generation structure.

[0048] (2) According to the present invention, the wave power generation device support structure of the jacket foundation enables integration of the wave power generation device and the foundation structure of the offshore wind turbine, thereby enabling hierarchical and three-dimensional development of marine energy, and 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 enabling large-scale development of wave energy.

[0050] (4) By applying the present invention to multiple offshore wind turbine foundations and realizing a certain scale of equipment capacity, it can serve as a substitute for the energy storage ratio of offshore wind power generation, thereby reducing investment in energy storage.

[0051] (5) In this invention, the cavities in the main chords of the jacket foundation are used as gas storage spaces or energy storage spaces, and storage pipelines are installed within the jacket main chords as gas storage equipment. This avoids the economic and process costs of constructing a separate compressed air storage chamber, thereby improving the resource value compared to conventional methods.

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

[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, seawater is filled into the gap between the main chord of the jacket and the storage pipeline, so that the difference in seawater pressure in the deep water region can be equalized.

[0055] (9) The hydraulic system and the expansion generator system are located inside the container, and the hydraulic motor and air compressor system is located inside the tower, which effectively prevents 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 via an AC bus cable inside the wind turbine, and output together with the power generated by the wind power generation system. This makes it possible to share power output equipment for wave power generation and wind power generation, thereby reducing investment. [Brief explanation of the drawing]

[0057] [Figure 1] This is a perspective view of the structure of the wave energy capture and storage system for the jacket foundation of an offshore wind power generation system according to the present invention. [Figure 2] This is a plan view of the wave energy capture and storage system for the jacket foundation of an offshore wind power generation system according to the present invention. [Figure 3] This is a perspective view of the reinforcing structure for the wave energy capture and storage system of the offshore wind power generation jacket foundation according to the present invention. [Modes for carrying out the invention]

[0058] The following describes specific embodiments of the present invention in more detail, with reference to the drawings. These embodiments are merely illustrative and do not limit the present invention.

[0059] In describing the present invention, the directions or positional relationships indicated by terms such as "center," "vertical," "horizontal," "up," "down," "front," "back," "left," "right," "perpendicular," "horizontal," "ceiling," "bottom," "inside," and "outside" are directions or positional relationships based on the illustrations and are merely for the convenience and simplification of the description of the present invention. They do not explicitly or implicitly suggest that the device or component in question has a specific direction or must be configured and operated in a specific direction. Therefore, they should not be interpreted as limiting the present invention. Furthermore, the terms "first" and "second" are merely for the convenience of description and should not be interpreted as explicitly or implicitly indicating relative importance.

[0060] It should be noted that, unless otherwise explicitly defined and limited, the terms “attach,” “connect,” and “join” in this invention should be interpreted broadly. For example, the connection may be fixed, removable, or integral. It may also be mechanical or electrical. Furthermore, it may be a direct connection, an indirect connection via an intermediate medium, or internal communication between two members. Those skilled in the art will be able to interpret the specific meaning of these terms in this invention according to the specific circumstances.

[0061] Furthermore, unless otherwise specified, the term "multiple" in the description of this invention means two or more.

[0062] As shown in Figures 1 to 3, the wave energy capture and storage system for the offshore wind turbine jacket foundation includes the wind turbine module and wind turbine jacket foundation, as well as a wave energy acquisition 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 acquisition system includes an energy acquisition float 6 and an oscillating rod 7. The energy acquisition float 6 floats on the water surface and, due to its own weight, buoyancy, and wave force, causes the oscillating rod 7 to oscillate up and down. The oscillating rod 7 is connected to the hydraulic system 8. The hydraulic system 8 includes a pressure medium storage container and an oscillating medium compression mechanism. The oscillating oscillating rod 7 acts on the hydraulic system 8 to drive the oscillating medium compression mechanism of the hydraulic system 8. The hydraulic system 8 is used to convert the mechanical energy of the oscillating rod 7 into internal energy of the primary pressure medium. The oscillating medium compression mechanism of the hydraulic system 8 delivers the primary pressure medium to the pressure medium storage container and / or transport pipeline 9. A pressure medium internal energy conversion device 10 is connected to the transport pipeline 9. The pressure medium internal energy conversion device 10 converts the internal energy of the primary pressure medium into mechanical energy, and then converts the mechanical energy into the internal energy of the secondary pressure medium. The pressure medium internal energy conversion device 10 delivers the secondary pressure medium to the storage pipeline 13 and / or expansion generator system 2. The storage pipeline 13 is used to store the secondary pressure medium. The discharge 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: By using waves to oscillate the energy acquisition float 6, the energy acquisition float 6 causes the oscillating rod 7 to act on the hydraulic system 8. Then, direct energy conversion is achieved by the transport pipeline 9, the pressure medium internal energy conversion device 10, and the expansion generator system 2. Alternatively, after storing the energy in the pressure medium storage container of the hydraulic system 8, conversion is achieved by the transport pipeline 9, the pressure medium internal energy conversion device 10, and the expansion generator system 2. Alternatively, after being delivered from the pressure medium internal energy conversion device 10, the energy may be stored in the storage pipeline 13, and after sufficient pressure energy has been stored in the storage pipeline 13, power generation may be performed continuously.

[0064] The internal space of the jacket main chord 4 is used to store the secondary pressure medium. Directly modifying the jacket main chord 4 to meet this storage requirement is equivalent to converting it into a connecting member and pressure storage container.

[0065] The energy storage system is implemented in a distributed manner. The energy storage system includes a storage pipeline 13. By implementing distributed storage in this manner, the space available in conventional offshore wind turbine jacket foundations can be fully utilized.

[0066] The energy storage system includes a pressure medium storage container. This allows not only the storage pipeline 13 to be used for energy storage, but also the pressure medium storage container to function as a storage container, buffering and storing the internal energy of the pressure medium during conversion.

[0067] The storage pipelines 13 are located inside the jacket main chord members 4. Adjacent storage pipelines 13 are arranged in parallel. That is, each storage pipeline 13 is individually connected to the internal energy conversion device 10 of the pressure medium, and each storage pipeline 13 is individually connected to the expansion generator system 2. Independent valves are connected to both the injection and discharge ends of the storage pipeline 13. The valves are used to control the injection of the secondary pressure medium into the storage pipeline 13 and its discharge from the storage pipeline 13. This configuration enables the following process: each storage pipeline 13 achieves individual storage and discharge. Storing the secondary pressure medium to increase its internal energy is equivalent to storing the increased energy. Discharging the secondary pressure medium is equivalent to releasing the stored energy. This energy is then used to convert it into another form, such as mechanical energy, and ultimately output as electrical energy.

[0068] The oscillating rod 7 includes a vertical oscillating rod 71, a horizontal oscillating rod 72, and a delivery oscillating rod 73. The vertical oscillating rod 71, horizontal oscillating rod 72, and delivery oscillating rod 73, which are connected to the jacket main chord 4 and the hydraulic system 8, form a four-bar linkage mechanism, and the vertical oscillating rod 71, horizontal oscillating rod 72, and delivery oscillating rod 73 are driven by the energy acquisition float 6 to perform reciprocating oscillation. This structure is simple, robust, easy to implement, and easy to maintain.

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

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

[0071] The hydraulic system 8 and the expansion generator system 2 are located outside the wind turbine tower 1, while the pressure medium internal energy conversion device 10 is located inside the wind turbine tower 1. Furthermore, the transport pipeline 9 penetrates the wind turbine tower 1 and connects to the pressure medium internal energy conversion device 10. The discharge end of the pressure medium internal energy conversion device 10 is connected to the storage pipeline 13 and / or the expansion generator system 2 via the transport pipeline 9. Thus, the layout is rational and compact.

[0072] There are at least two storage pipelines 13 located within the jacket main chord 4. Furthermore, the transport pipelines 9 for delivery and injection of each storage pipeline 13 are independent of each other. This is convenient for achieving independent control and use of each storage pipeline 13. In other words, it is convenient for achieving any of the functions of injecting only the secondary pressure medium, discharging only, or both injection and discharge.

[0073] Each jacket main chord member 4 is provided with at least two storage conduits 13. The storage conduits 13 are connected to the jacket main chord members 4 via annular plates 14. The annular plates 14 are spaced apart so that a gap is maintained 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 member 4. One end of the jacket main chord member 4 has a projection that fits into the adjacent gaps of the annular plate 14. As a result, the two jacket main chord members 4 are tightly connected after being engaged via the annular plate 14.

[0075] The conventional structure of the jacket's main chord material will be fully utilized for the storage of the secondary pressure medium.

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

[0077] A void is provided between the jacket main chord 4 and the storage pipeline 13, and seawater is filled into this void. This is used to absorb excess heat during the process of supplying the secondary pressure medium to the storage pipeline 13, and to reduce the expansion caused by the temperature rise of the jacket main chord 4 and the storage pipeline 13, thereby suppressing changes in the equipment capacity.

[0078] The hydraulic system 8 and the expansion generator system 2 are installed inside 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 via an AC bus cable inside the wind turbine.

[0080] The wind turbine tower 1 is installed on platform 3. Below platform 3, jacket main chord members 4 are installed to support platform 3. Jacket braces 5 are installed on jacket main chord members 4.

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

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

[0083] The hydraulic system 8 includes a piston, a cylinder, and a valve. The piston generates pressure within the air cylinder or hydraulic cylinder through oscillating motion, which acts on the primary pressure medium to deliver the primary pressure medium.

[0084] Hydraulic system 8 is a swing compressor that compresses gas or liquid through oscillating motion. Hydraulic system 8 is not only capable of compressing liquids, but can also be used to compress gases.

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

[0086] Oscillating piston: A swing compressor has one oscillating piston. The oscillating piston is connected to a drive mechanism, such as a wave energy acquisition system, to initiate reciprocating motion.

[0087] Medium suction: During one phase of the oscillating piston's motion, the medium is drawn into the compressor cylinder. The oscillating motion tends to increase the cylinder's volume, which lowers the pressure of the medium inside the cylinder and draws in the external medium.

[0088] Gas compression: In another phase of the oscillating piston's motion, the cylinder's volume gradually decreases, and the medium is compressed. This compression process increases the pressure of the medium.

[0089] Discharge of high-pressure medium: Compressed high-pressure medium is used for driving, conversion, or delivering gas to a target area.

[0090] Circulation process: The compressor continues its oscillating motion, causing the medium to circulate and be discharged.

[0091] Specifically, the hydraulic system 8 is a swing compressor, which compresses the gas by oscillating motion when the medium is gas.

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

[0093] Oscillating piston: A swing compressor has one oscillating piston. The oscillating piston is connected to a drive mechanism, such as a wave energy acquisition system, to initiate reciprocating motion.

[0094] Gas intake: During one phase of the oscillating piston's motion, gas is drawn into the compressor's gas cylinder. The oscillating motion gradually increases the volume of the gas cylinder, causing the pressure inside the cylinder to decrease and drawing in external gas.

[0095] Gas compression: In another phase of the oscillating piston's motion, the volume of the gas cylinder gradually decreases, and the gas is compressed. This compression process increases the gas pressure.

[0096] Release of high-pressure gas: Compressed high-pressure gas is released into the system. Typically, it is transmitted through pipelines to a condenser. In the condenser, the gas is cooled by releasing heat and converted back into a liquid.

[0097] Circulation process: The compressor continues its oscillating motion, compressing the gas, which is then used for storage, delivery to a target area, or conversion into mechanical energy.

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

[0099] Expansion device: Includes a single container or pipeline filled with high-pressure gas. The gas may be obtained from an external compression system or generated by a chemical reaction. In this invention, the gas is injected from an external source.

[0100] Expansion process: When high-pressure gas flows from a high-pressure area to a low-pressure area through a device such as a nozzle or valve, the gas expands. During the expansion process, the volume of the gas increases while its temperature decreases.

[0101] Generator drive: The kinetic energy of the gas generated during the expansion process is used to drive the generator. During the expansion process, the gas passes through a turbine or impeller, causing it to rotate. This rotational motion is mechanically converted into the rotation of the generator's rotor, generating an electric current.

[0102] Generation of electrical energy: The mechanical energy generated by the motion of the generator's rotor is converted into electrical energy. This electrical energy may be output directly for power supply or 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. Mechanical motion includes rotational motion. The air compressor is used to convert mechanical energy into internal energy of the gas. The mechanical motion causes the mechanical structure of the air compressor to act on the secondary pressure medium, increasing the internal energy of the secondary pressure medium.

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

[0105] (1) On land, as shown in Figure 1, the energy acquisition structure consisting of an energy acquisition float 6, a lateral oscillation rod 72, a vertical oscillation rod 71, and a delivery oscillation rod 73 is assembled with the jacket turbine foundation by welding. The jacket turbine foundation includes a platform 3, jacket main chord members 4, and jacket braces 5.

[0106] (2) Install the jacket turbine foundation equipped with a wave energy acquisition device at a predetermined location in a predetermined sea area.

[0107] (3) After the assembly of the hydraulic system 8 and the expandable generator system 2 is completed on land, they are placed in separate containers and then lifted and installed in the designated area of ​​the offshore wind turbine jacket platform 3.

[0108] (4) Assemble and connect the hydraulic system 8 and the delivery oscillating rod 73 at the top of the wave energy acquisition 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) The wave energy acquisition system, hydraulic system 8, hydraulic motor / air compressor system, and expansion generator system 2 will be commissioned and adjusted.

[0113] The detailed operating principle in a specific embodiment is as follows: The float of the energy acquisition float 6 reciprocates up and down due to the action of wave force and gravity, causing the vertical oscillation rod 71 to reciprocate up and down. This causes the horizontal oscillation rod 72 to oscillate around the hinge connection point, and the delivery oscillation rod 73 to oscillate parallel to the horizontal oscillation rod 72, causing the piston of the hydraulic system 8 to reciprocate and either deliver high-pressure oil or temporarily store it. The high-pressure oil rotates the hydraulic motor of the hydraulic motor / air compressor system, and the hydraulic motor operates the air compressor. The air compressor delivers compressed air into the storage pipeline 13 or other pressure vessel. 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, operating the expansion generator system 2. The electrical energy output is output via the grid-connected inverter, integrated with the 400V AC bus cable inside the wind turbine, and output together with the electricity generated by the wind power generation system. The above description represents only preferred embodiments of the present invention. It should be noted that those skilled in the art may make some improvements and substitutions without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention. [Explanation of symbols]

[0114] 1 Wind turbine tower 2. Expansion Generator System 3 Platforms 4. Jacket main string material 5 Jacket Brace 6. Energy acquisition float 7. Oscillating rod 8. Hydraulic System 9 Transport pipeline 10 Pressure medium internal energy conversion device 11 Main chord ceiling hole 13 Storage pipelines 14 Ring Plate 71 Vertical oscillating rod 72 Side-to-side oscillating rod 73 Sending oscillating rod

Claims

1. A wave energy capture and storage system for an offshore wind turbine jacket foundation, including wind turbine modules and wind turbine jacket foundations, It includes a wave energy acquisition 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 acquisition system includes an energy acquisition float (6) and a rocking rod (7). The energy acquisition float (6) floats on the water surface and, due to the action of its own weight, buoyancy, and wave force, causes the oscillating rod (7) to oscillate up and down. The oscillating rod (7) is connected to the hydraulic system (8), which includes a pressure medium storage container and an oscillating medium compression mechanism. The oscillating rod (7) acts on the hydraulic system (8) to drive the oscillating medium compression mechanism of the hydraulic system (8), and the hydraulic system (8) is used to convert the mechanical energy of the oscillating rod (7) into internal energy of the primary pressure medium. The oscillating medium compression mechanism of the hydraulic system (8) delivers the primary pressure medium and supplies it to the pressure medium storage container and / or transport pipeline (9), and after storing it in the pressure medium storage container of the hydraulic system (8), it is converted by the transport pipeline (9), the pressure medium internal energy conversion device (10), and the expansion generator system (2). The transport pipeline (9) is connected to the pressure medium internal energy conversion device (10), which converts the internal energy of the primary pressure medium into mechanical energy, and then converts the mechanical energy into internal energy of the secondary pressure medium. The pressure medium internal energy conversion device (10) sends out the secondary pressure medium and supplies it to the storage pipeline (13) and / or the expansion generator system (2). The storage pipeline (13) is used to store the secondary pressure medium, and the outlet 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, and the expansion generator system (2) converts the acquired mechanical energy into electrical energy and outputs it. The aforementioned energy storage system is provided in a distributed manner. The energy storage system includes the storage pipeline (13), The storage pipeline (13) is located inside the jacket main chord (4), and adjacent storage pipelines (13) are arranged in parallel, and each storage pipeline (13) and the pressure medium internal energy conversion device (10) are individually connected. A wave energy capture and storage system for an offshore wind turbine jacket foundation, characterized in that the storage pipeline (13) and the expansion generator system (2) are individually connected, and independent valves are connected to both the injection end and the discharge end of the storage pipeline (13), and the valves are used to control the injection of the secondary pressure medium into the storage pipeline (13) and the discharge from the storage pipeline (13).

2. The oscillating rod (7) includes a vertical oscillating rod (71), a horizontal oscillating rod (72), and a discharge oscillating rod (73). The vertical oscillating rod (71), the horizontal oscillating rod (72), and the delivery oscillating rod (73), which are connected to the jacket main chord member (4) and the hydraulic system (8), constitute a four-bar linkage mechanism, and the vertical oscillating rod (71), the horizontal oscillating rod (72), and the delivery oscillating rod (73) are driven by the energy acquisition float (6) to perform reciprocating oscillations. One end of the lateral oscillating rod (72) is hinged to the central part of the vertical oscillating rod (71), and the other end of the lateral oscillating rod (72) is hinged to the jacket main chord member (4). The wave energy capture and storage system for the offshore wind turbine jacket foundation according to claim 1, characterized in that the energy acquisition float (6) is connected to the lower end of the vertical oscillation rod (71), the upper end of the vertical oscillation rod (71) is connected to one end of the delivery oscillation rod (73) by a hinge connection, and the other end of the delivery oscillation rod (73) is connected to the hydraulic system (8).

3. The hydraulic system (8) and the expansion generator system (2) are installed outside the wind turbine tower (1). The pressure medium internal energy conversion device (10) is installed inside the wind turbine tower (1), The transport pipeline (9) penetrates 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 turbine jacket foundation according to claim 1, characterized in that the discharge 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).

4. The wave energy capture and storage system for the jacket foundation of an offshore wind power generation facility according to claim 1, characterized in that there are at least two storage pipelines (13) arranged within each of the jacket main chord members (4), and the transport pipeline (9) for delivery and the transport pipeline (9) for injection of each storage pipeline (13) are independent of each other.

5. The storage pipeline (13) is connected to the jacket main chord member (4) via annular plates (14), and the annular plates (14) are spaced apart so as 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 member (4), and one end of the jacket main chord member (4) has a projection that fits into the adjacent gaps of the annular plate (14). The wave energy capture and storage system for the offshore wind turbine jacket foundation according to claim 4, characterized in that the two jacket main chord members (4) are engaged via the annular plate (14) and then tightly connected.

6. The pressure medium internal energy conversion device (10) is equipped with a vibration damping device, a gap is provided between the jacket main chord member (4) and the storage pipeline (13), and seawater is filled into the gap. The hydraulic system (8) and the expansion generator system (2) are installed inside the 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 by an AC bus cable inside the wind turbine. The wind turbine tower (1) is provided on the platform (3), and below the platform (3) the jacket main chord members (4) are provided to support the platform (3). The jacket main chord member (4) is provided with a jacket brace (5). The expansion generator system (2) includes an expansion device and a generator, wherein the primary pressure medium is a gas or liquid, and the secondary pressure medium is a gas. The wave energy capture and storage system for the jacket foundation of an offshore wind power generation facility according to claim 3, wherein the hydraulic system (8) includes a piston, a cylinder, and a valve, and the piston generates pressure in the cylinder by oscillating motion, which acts on the primary pressure medium to deliver the primary pressure medium.

7. 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, and the mechanical motion includes rotational motion; the air compressor is used to convert mechanical energy into internal energy of the gas. The wave energy capture and storage system for the jacket foundation of an offshore wind power generation facility according to any one of claims 1 to 5, characterized in that the mechanical motion causes the mechanical structure of the air compressor to act on the secondary pressure medium, thereby increasing the internal energy of the secondary pressure medium.

8. The wave energy capture and storage system for an offshore wind turbine jacket foundation according to claim 6, characterized in that the internal space of the jacket main chord (4) is used to store the secondary pressure medium, the energy storage system includes the pressure medium storage container, 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 disposed inside the jacket main chord (4).

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