Liftable wind and wave combined power generation system

Abstract

A liftable wind and wave combined power generation system comprises a plurality of wave energy power generation devices evenly distributed on a tower, a fixed wind power generation device arranged at the top end of the tower and a data collecting and processing device. The wave energy power generation device is used for generating power by utilizing wave energy, the fixed wind power generation device is used for capturing and utilizing wind energy to generate power, and the data acquisition and processing device is used for monitoring and collecting various operation data of the combined power generation system and accurately adjusting the height of a floater of the wave energy power generation device. Efficient capture and conversion of wave energy are ensured, shaking caused by wave changes is reduced, and the stability and reliability of the fixed wind power generation device are promoted.

Description

Technical Field:

[0001] The present invention relates to a liftable wind and wave combined power generation system. Background Art:

[0002] Under the requirements of the global energy structure transformation and environmental protection, the development and efficient utilization of clean energy have become an important direction for energy research and application development; among them, the combined power generation technology of floating wind turbines and wave energy devices, as a cutting-edge innovation in the field of marine renewable energy, has been widely used due to its significant advantages such as resource complementarity, cost savings, and improved energy supply stability.

[0003] Most of the existing wind and wave combined power generation systems simply integrate the wind energy power generation device and the wave energy power generation device on the same carrier, lacking a deep coordination and interaction mechanism between them, resulting in the overall power generation efficiency being difficult to break through the bottleneck and unable to meet the demand for maximizing actual efficiency; at the same time, the existing system platforms are designed and produced using unified standards, lacking optimization considerations for specific sea area conditions and energy conversion efficiency, severely restricting the large-scale and stable application of the system platforms. Summary of the Invention:

[0004] The embodiment of the present invention provides a liftable wind and wave combined power generation system with reasonable structural design. Relying on the tower of an abandoned offshore oilfield, it integrates a wave energy power generation device, a fixed wind power generation device, and a data acquisition and processing device to form an efficient and coordinated energy conversion platform. It can not only efficiently convert wave energy into electrical energy, but also use floats to absorb wave energy, reduce the impact of waves on the equipment, dynamically adjust the wind turbines mounted thereon, effectively enhance the stability of the platform, ensure the smooth operation of the wind turbines under complex sea conditions, thereby improving the power generation efficiency and operation reliability of the overall wind and wave combined power generation system. At the same time, it can still keep the floats within the effective height range under specific sea area conditions of rising and falling tides and large wave height changes, optimize the energy conversion efficiency, improve the adaptability and stability of the power generation system to environmental changes, enable the large-scale and stable application of the power generation system, and solve the problems existing in the prior art.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] A liftable combined wave and wind power generation system, the combined power generation system includes a plurality of wave energy power generation devices evenly distributed on a tower, a fixed wind power generation device arranged at the top of the tower, and a data acquisition and processing device; the wave energy power generation device is used to generate electricity using wave energy, the fixed wind power generation device is used to capture and utilize wind energy for power generation, and the data acquisition and processing device is used to monitor and collect various operating data of the combined power generation system, accurately adjust the float height of the wave energy power generation device, ensure the efficient capture and conversion of wave energy, reduce the sway caused by wave changes, and promote the stability and reliability of the fixed wind power generation device.

[0007] The wave energy power generation device includes a float, an upper A-shaped plate and a lower A-shaped plate are sequentially connected to the float. The tail connection of the upper A-shaped plate is connected to the top of the back plate. The middle connection of the upper A-shaped plate is connected to the middle end of the back plate through a hydraulic press. The head connection of the upper A-shaped plate is connected to the top of the float, so that when the float moves up and down, it drives the upper A-shaped plate and the hydraulic press to move.

[0008] The piston rod of the hydraulic press is connected to the upper A-shaped plate, and the cylinder barrel of the hydraulic press is connected to the back plate.

[0009] The tail connection of the lower A-shaped plate is connected to the bottom end of the back plate, and the head connection of the lower A-shaped plate is connected to the middle part of the float.

[0010] One side of the back plate is a vertical side, and the upper A-shaped plate, the hydraulic press and the lower A-shaped plate are sequentially connected from top to bottom on the vertical side of the back plate; the other side of the back plate is an inclined side, and a plurality of pulleys are connected to the inclined side of the back plate, so that the back plate slides up and down on the tower slide rail; two clamping members are symmetrically distributed at the bottom end of the back plate, and the clamping members can rotate around an axis, and are used to clamp the slide rail on the tower to prevent the wave energy power generation device from falling when the wave height is relatively stable, and at the same time loosen when the wave height is unstable so that the pulley moves up and down with the change of the wave height.

[0011] The float is used to move up and down with the change of the wave height to provide an input force for the combined power generation system, absorb the kinetic energy of the wave and convert it into the potential energy of the float to make the float move vertically, and then drive the upper A-shaped plate to rotate around the back plate. The piston rod of the hydraulic press connected to the upper A-shaped plate moves back and forth in the cylinder barrel of the hydraulic press, and the conversion of hydraulic energy and mechanical energy is realized in the hydraulic press.

[0012] The number of the wave energy power generation devices is 5, and they are distributed in a circular array around the tower.

[0013] The fixed wind power generation device includes a generator set and a fixed platform arranged on the tower. The generator set includes a fan rear seat and fan blades that are cooperatively arranged.

[0014] The data acquisition and processing device can monitor the water level parameters of the wave energy power generation device and adjust the height of the float of the wave energy power generation device on the slide rail based on this;

[0015] The specific steps are as follows: The data acquisition and processing device detects the real-time wave height and determines whether the float of the wave energy power generation device touches the sea level; when the float touches the sea level, there is no need to adjust the height of the float; when the float does not touch the sea level, the wave energy power generation device slides down along the slide rail on the tower to make the float touch the sea level and not be completely submerged in the sea level.

[0016] A wave height judgment unit is provided in the data acquisition and processing device. The wave height judgment unit is used to judge the wave height of the combined power generation system. If the float does not touch the sea level, it controls the pulley to slide down along the slide rail. When it reaches a suitable position, the clamping member clamps the slide rail to keep the wave energy power generation device at a fixed height; if the float touches the sea level, it does not respond; if the float completely moves below the sea level, it controls the pulley to slide up along the slide rail. When it reaches a suitable position, the clamping member clamps the slide rail to keep the wave energy power generation device at a fixed height.

[0017] With the above structure, the present invention integrates the wave energy power generation device, the fixed wind power generation device and the data acquisition and processing device onto the tower of the offshore abandoned oil field, and can efficiently convert wave energy into electric energy; through the data acquisition and processing device, it monitors and collects various operation data of the combined power generation system, accurately adjusts the height of the float of the wave energy power generation device, ensures the efficient capture and conversion of wave energy, reduces the sway caused by wave changes, and promotes the stability and reliability of the fixed wind power generation device; by transforming the existing various wind-wave combined power generation platforms, the power generation efficiency and operation reliability of the wind-wave combined power generation platform are overall improved; the float moves up and down with the change of wave height to provide an input force for the combined power generation system, absorbs the kinetic energy of the wave and converts it into the potential energy of the float to make the float move vertically, and then drives the upper A-shaped plate to rotate around the back plate. The piston rod of the hydraulic press connected to the upper A-shaped plate moves back and forth in the cylinder of the hydraulic press, and realizes the conversion of hydraulic energy and mechanical energy in the hydraulic press, which has the advantages of stable and efficient, safe and practical. Description of the Drawings:

[0018] Figure 1 It is a schematic structural diagram of the wave energy power generation device of the present invention.

[0019] Figure 2 It is a schematic diagram of the working principle of the float rising of the wave energy power generation device of the present invention.

[0020] Figure 3 It is a schematic diagram of the working principle of the float descending of the wave energy power generation device of the present invention.

[0021] Figure 4It is a schematic diagram of the overall structure of the present invention.

[0022] In the figure, 1. float, 2. upper A-shaped plate, 3. lower A-shaped plate, 4. hydraulic press, 5. back plate, 6. pulley, 7. clamping part, 8. slide rail, 9. tower, 10. wave energy power generation device, 11. data acquisition and processing device, 12. fan rear seat, 13. fan blades. Specific implementation method:

[0023] In order to clearly illustrate the technical features of the present solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0024] like Figures 1-4 As shown in the figure, a liftable wind-wave combined power generation system comprises a plurality of wave power generation devices 10 evenly distributed on a tower, a fixed wind power generation device arranged at the top of the tower, and a data acquisition and processing device 11; the wave power generation device 10 is used to generate electricity using wave energy, the fixed wind power generation device is used to capture and generate electricity using wind energy, and the data acquisition and processing device 11 is used to monitor and collect various operating data of the combined power generation system, accurately adjust the float height of the wave power generation device 10, ensure efficient capture and conversion of wave energy, reduce shaking caused by wave changes, and promote the stability and reliability of the fixed wind power generation device.

[0025] The wave energy power generation device 10 comprises a float 1, on which an upper A-shaped plate 2 and a lower A-shaped plate 3 are sequentially connected, the tail connection of the upper A-shaped plate 2 is connected to the top of the back plate 5, the middle connection of the upper A-shaped plate 2 is connected to the middle end of the back plate 5 through a hydraulic press 4, and the head connection of the upper A-shaped plate 2 is connected to the top of the float 1, so that the upper A-shaped plate 2 and the hydraulic press 4 are driven to move when the float 1 moves up and down;

[0026] The piston rod of the hydraulic press 4 is connected to the upper A-shaped plate 2, and the cylinder of the hydraulic press 4 is connected to the back plate 5;

[0027] The tail connection of the lower A-shaped plate 3 is connected to the bottom end of the back plate 5, and the head connection of the lower A-shaped plate 3 is connected to the middle part of the float 1;

[0028] One side of the backboard 5 is a vertical side, on which an upper A-shaped plate 2, a hydraulic press 4 and a lower A-shaped plate 3 are successively connected from top to bottom; the other side of the backboard 5 is an inclined side, on which a plurality of pulleys 6 are connected to enable the backboard 5 to slide up and down on the slide rail 8 of the tower 9; two clamping members 7 are symmetrically distributed at the bottom end of the backboard 5, and the clamping members 7 can rotate around an axis and are used to clamp the slide rail 8 on the tower 9 to prevent the wave energy power generation device from falling when the wave height is relatively stable, and at the same time relax when the wave height is unstable so that the pulley 6 moves up and down with the change of the wave height:

[0029] The float 1 is used to move up and down with the change of the wave height to provide an input force for the combined power generation system, absorb the kinetic energy of the wave and convert it into the potential energy of the float to make the float move vertically, and then drive the upper A-shaped plate 2 to rotate around the backboard 5. The piston rod of the hydraulic press 4 connected to the upper A-shaped plate 2 makes a reciprocating motion in the cylinder of the hydraulic press, and the conversion of hydraulic energy and mechanical energy is realized in the hydraulic press 4.

[0030] The number of the wave energy power generation devices 10 is 5, and they are distributed in a circular array around the tower 9.

[0031] The fixed wind power generation device includes a generator set and a fixed platform arranged on the tower 9, and the generator set includes a wind turbine rear seat 12 and wind turbine blades 13 which are cooperatively arranged.

[0032] The data acquisition and processing device 11 can monitor the water level parameters of the wave energy power generation device and adjust the height of the float of the wave energy power generation device 10 on the slide rail 8 based on this;

[0033] The specific steps are as follows: The data acquisition and processing device detects the real-time wave height and determines whether the float of the wave energy power generation device touches the sea level; when the float touches the sea level, the height of the float does not need to be adjusted; when the float does not touch the sea level, the wave energy power generation device slides down along the slide rail on the tower so that the float touches the sea level and is not completely submerged in the sea level.

[0034] A wave height judgment unit is provided in the data acquisition and processing device. The wave height judgment unit is used to judge the wave height of the combined power generation system. If the float does not touch the sea level, it controls the pulley to slide down along the slide rail, and when it reaches a suitable position, the clamping member clamps the slide rail to keep the wave energy power generation device at a fixed height; if the float touches the sea level, it does not respond; if the float completely moves below the sea level, it controls the pulley to slide up along the slide rail, and when it reaches a suitable position, the clamping member clamps the slide rail to keep the wave energy power generation device at a fixed height.

[0035] The working principle of a liftable wave and wind combined power generation system in an embodiment of the present invention is as follows: relying on the tower of an offshore abandoned oilfield, a wave energy power generation device, a fixed wind power generation device, and a data acquisition and processing device are integrated to form an efficient and collaborative energy conversion platform. It can not only efficiently convert wave energy into electrical energy, but also use floats to absorb wave energy, reduce the impact of waves on equipment, dynamically adjust the wind turbines mounted thereon, effectively enhance the stability of the platform, ensure the stable operation of the wind turbines under complex sea conditions, thereby improving the power generation efficiency and operation reliability of the overall wave and wind combined power generation system. At the same time, for specific sea area conditions with rising and falling tides and large wave height changes, the floats can still be maintained within the effective height range, optimizing the energy conversion efficiency, enhancing the adaptability and stability of the power generation system to environmental changes, and enabling the large-scale and stable application of the power generation system.

[0036] With the rapid development of China's marine economy and the continuous improvement of industrial production levels, offshore oil and gas development has become increasingly frequent, and more and more oil and gas production facilities such as offshore oil and gas platforms have been applied. Since the design life of offshore oil and gas platforms is generally about 20 years, with the passage of the production time, a large number of offshore oil and gas platforms in China have gradually entered the retirement stage. The wave energy power generation device designed in the present invention can effectively reuse the tower of the abandoned oilfield.

[0037] Compared with the traditional design, a significant leap has been achieved. By cleverly integrating the fixed wind power generation device with the tower of the offshore abandoned oilfield, not only the overall structure is simplified, but also the power generation efficiency is greatly improved. This innovative design effectively saves resources, enhances the stability of the offshore wind power generation device, and ensures that the wind turbines can still maintain a stable power output under complex sea conditions, thereby further improving the overall power generation efficiency of the floating wind turbines.

[0038] In the overall scheme, it includes a plurality of wave energy power generation devices evenly distributed on the tower, a fixed wind power generation device arranged at the top of the tower, and a data acquisition and processing device. The wave energy power generation device is used to generate electricity by using wave energy, the fixed wind power generation device is used to capture and utilize wind energy for power generation, and the data acquisition and processing device is used to monitor and collect various operation data of the combined power generation system, accurately adjust the height of the floats of the wave energy power generation device, ensure the efficient capture and conversion of wave energy, reduce the sway caused by wave changes, and promote the stability and reliability of the fixed wind power generation device.

[0039] For a wave energy power generation device, including a float, an upper A-shaped plate and a lower A-shaped plate are successively connected to the float. The tail connection of the upper A-shaped plate is connected to the top end of the back plate. The middle connection of the upper A-shaped plate is connected to the middle end of the back plate through a hydraulic press. The head connection of the upper A-shaped plate is connected to the top of the float, so that when the float moves up and down, it drives the upper A-shaped plate and the hydraulic press to move. The piston rod of the hydraulic press is connected to the upper A-shaped plate, and the cylinder barrel of the hydraulic press is connected to the back plate. The tail connection of the lower A-shaped plate is connected to the bottom end of the back plate, and the head connection of the lower A-shaped plate is connected to the middle part of the float. One side of the back plate is a vertical side, and the upper A-shaped plate, the hydraulic press and the lower A-shaped plate are successively connected from top to bottom on the vertical side of the back plate. The other side of the back plate is an inclined side, and a plurality of pulleys are connected to the inclined side of the back plate, so that the back plate slides up and down on the tower rail. Two clamping members are symmetrically distributed at the bottom end of the back plate. The clamping members can rotate around an axis and are used to clamp the rail on the tower to prevent the wave energy power generation device from falling in the case of relatively stable wave height, playing a role in fixing and stabilizing the wave energy power generation device. At the same time, in the case of unstable wave height, it is relaxed to enable the pulley to move up and down with the change of wave height. The float is used to move up and down with the change of wave height to provide an input force for the combined power generation system, absorb the kinetic energy of the wave and convert it into the potential energy of the float to make the float move vertically, and then drive the upper A-shaped plate to rotate around the back plate. The piston rod of the hydraulic press connected to the upper A-shaped plate makes a reciprocating motion in the cylinder barrel of the hydraulic press, and the conversion of hydraulic energy and mechanical energy is realized in the hydraulic press.

[0040] Further, when the wave surface rises greatly and the float is completely below the sea level, the pulley is controlled to slide upward along the rail. When it reaches a suitable position, the clamping member clamps the rail so that the wave energy power generation device reaches a fixed height. When the wave surface drops greatly and the float is completely above the sea level, the pulley is controlled to slide downward along the rail. When it reaches a suitable position, the clamping member clamps the rail so that the wave energy power generation device reaches a fixed height.

[0041] Through the optimized design of combining the offshore abandoned oilfield tower with the wind and wave combined power generation system platform, this application realizes the secondary utilization of the offshore abandoned tower and the efficient and stable conversion of wave energy into electrical energy, enables the float to rise and fall with the change of wave height, and significantly improves the utilization efficiency of wave energy and the overall performance of the power generation platform.

[0042] In the data acquisition and processing device, the environmental state of the combined wind and wave power generation platform can be monitored and analyzed in real time, especially the dynamic changes in the wave height; the data acquisition and processing device first collects the wave height parameter to judge the wave height at the location of the combined wind and wave power generation platform. When the current height is suitable for the wave energy device to generate electricity, the state of the wave energy power generation device will not be interfered; if the float does not contact the sea level, the control pulley will slide down along the slide rail, and when it reaches the appropriate position, the clamping member will clamp the slide rail to make the wave energy power generation device at a fixed height; if the float is completely below the sea level, the control pulley will slide up along the slide rail, and when it reaches the appropriate position, the clamping member will clamp the slide rail to make the wave energy power generation device at a fixed height, realizing the efficient and stable operation of the combined wind and wave power generation platform.

[0043] By collecting the wave height of the working environment and adjusting the height of the float in the wave energy power generation device, the data acquisition and processing device can not only maximize the use of wave energy for power generation under suitable conditions, improve the energy conversion efficiency, but also actively adjust and control the float height in a complex wind and wave environment, effectively cope with large tidal fluctuations, extend the platform service life, and reduce the maintenance cost.

[0044] For the number of wave energy power generation devices, it can be set to 5, which are distributed in a circular array around the tower. This not only optimizes the hydrodynamic performance but also enhances the structural stability, enabling the wave energy power generation devices to have a larger adjustment space to adapt to different wave heights around the tower at the same moment and maximizing the absorption of wave energy; considering the idle problem of the existing offshore abandoned oilfield towers, this setting method has good economy; therefore, the present invention focuses on the upgrade and transformation of offshore abandoned oilfield towers, greatly improving the applicability and commercial potential through modular design, and paving the way for large-scale promotion and construction.

[0045] On the other hand, by adopting the transformation of the abandoned towers of offshore oilfields and integrating multiple wave energy power generation devices in a circular array, the existing abandoned towers widely present in offshore oilfields are innovatively transformed, significantly enhancing the structural stability and power generation efficiency of the fixed liftable combined wind and wave power generation system, thus promoting the sustainable development and economy of deep-sea and far-sea wind power projects.

[0046] Most of the wave energy power generation devices are installed outside various abandoned oilfield towers, with a low overall failure rate, reducing the difficulty of maintenance and replacement. They can assist in adjusting the combined wind and wave power generation platform in real time according to the ocean conditions, improving the stability of the combined wind and wave power generation platform.

[0047] Preferably, the present application adopts modular design, which is convenient for on-site deployment. It not only has convenient construction and significantly reduced installation costs but also shows adaptability to a wide range of water depth environments, providing a flexible and economic solution for large-scale offshore energy development.

[0048] For the float, as a key component of the combined wind and wave power generation platform, it ingeniously captures and converts the vertical motion energy of waves through its innovative mobility, significantly improving the power generation efficiency and the overall effectiveness of the system. Compared with traditional technologies, the device of the present invention effectively utilizes the tower frames of offshore abandoned oilfields, facilitating large-scale transformation of existing tower frames. It can effectively absorb wave energy and reduce the impact on equipment, significantly enhancing the overall stability of the offshore wind power generation device, effectively resisting the fluctuating influence of the marine environment, and ensuring the continuity and efficiency of the fan operation.

[0049] For the data acquisition and processing device, it can obtain the data of the combined wind and wave power generation system and adjust the height position of the float based on this. It uses advanced algorithms for analysis and calculation to precisely adjust the height of each float in the wave energy power generation device to ensure the efficient capture and conversion of wave energy. At the same time, this adjustment process also promotes the stability of the fixed wind power generation device, reduces the sway caused by waves, and further improves the efficiency and reliability of wind power generation.

[0050] The wave energy power generation device is set in cooperation with the fixed wind power generation device. Utilizing the movement of the system platform rising and falling with the waves, it converts the vertical motion energy of the waves into hydraulic energy of the hydraulic press and then into electrical energy.

[0051] This application significantly improves the stability and safety of the combined wind and wave power generation platform in complex sea conditions through the combination of intelligent monitoring and active control. At the same time, on the basis of ensuring the stable operation of the platform, it effectively improves the wave energy power generation efficiency, realizes the maximum utilization of energy and green sustainable development, provides important support for the development of the combined wind and wave power generation technology, and promotes the development and progress of the field of marine energy resource utilization.

[0052] It should be specifically noted that this application effectively improves the stability and adaptability of the power generation platform system in the wind and wave environment. It can adjust the float height to increase energy income when the sea surface height is relatively low, and can quickly restore balance when the sea level height changes significantly, enhancing the platform's ability to resist harsh sea conditions. Moreover, the structure design is simple, facilitating popularization and large-scale application. By integrating and innovating the wave energy power generation device and the wind power generation system transformed from the tower frames of offshore abandoned oilfields, it realizes the complementary utilization of two clean energies, wind energy and wave energy, significantly improving the comprehensive efficiency and stability of offshore power generation. The introduction of the data acquisition and processing device ensures the efficiency and accuracy of the energy conversion process.

[0053] This application also has the advantages of simple structure, convenient installation, high cost-effectiveness, etc., providing strong support for the large-scale popularization of offshore clean energy power generation technology.

[0054] In summary, a liftable wave and wind combined power generation system in the embodiments of the present invention relies on the tower of an abandoned offshore oilfield, integrates a wave energy power generation device, a fixed wind power generation device and a data acquisition and processing device to form an efficient and collaborative energy conversion platform. It can not only efficiently convert wave energy into electric energy, but also use floats to absorb wave energy, reduce the impact of waves on equipment, dynamically adjust the wind turbines mounted thereon, effectively enhance the stability of the platform, ensure the smooth operation of the wind turbines under complex sea conditions, thereby improving the power generation efficiency and operation reliability of the overall wave and wind combined power generation system. At the same time, for specific sea area conditions with rising and falling tides and large wave height changes, the floats can still be maintained within the effective height range, optimizing the energy conversion efficiency, enhancing the adaptability and stability of the power generation system to environmental changes, and enabling the large-scale and stable application of the power generation system.

[0055] The above specific embodiments cannot be used as a limitation on the protection scope of the present invention. For those skilled in the art of the present technology, any alternative improvement or transformation made to the embodiments of the present invention falls within the protection scope of the present invention.

[0056] Where the present invention is not described in detail, it is the well-known technology of those skilled in the art of the present technology.

Claims

1. A liftable combined wind and wave power generation system, characterized in that: The combined power generation system includes a plurality of wave energy power generation devices evenly distributed on a tower, a fixed wind power generation device arranged at the top of the tower, and a data acquisition and processing device; the wave energy power generation device is used for generating electricity by using wave energy, the fixed wind power generation device is used for capturing and using wind energy for power generation, and the data acquisition and processing device is used for monitoring and collecting various operation data of the combined power generation system, accurately adjusting the float height of the wave energy power generation device, ensuring the efficient capture and conversion of wave energy, reducing the sway caused by wave changes, and promoting the stability and reliability of the fixed wind power generation device.

2. The liftable wind-wave combined power generation system according to claim 1, wherein: The wave energy power generation device includes a float, on which an upper A-shaped plate and a lower A-shaped plate are successively connected. The tail connection of the upper A-shaped plate is connected to the top end of the back plate, the middle connection of the upper A-shaped plate is connected to the middle end of the back plate through a hydraulic press, and the head connection of the upper A-shaped plate is connected to the top of the float, so that when the float moves up and down, it drives the upper A-shaped plate and the hydraulic press to move. The piston rod of the hydraulic press is connected to the upper A-shaped plate, and the cylinder barrel of the hydraulic press is connected to the back plate. The tail connection of the lower A-shaped plate is connected to the bottom end of the back plate, and the head connection of the lower A-shaped plate is connected to the middle of the float. One side of the back plate is a vertical side, on which the upper A-shaped plate, the hydraulic press and the lower A-shaped plate are successively connected from top to bottom; the other side of the back plate is an inclined side, on which a plurality of pulleys are connected, so that the back plate slides up and down on the tower slide rail; at the bottom end of the back plate, two clamping members are symmetrically distributed, and the clamping members can rotate around an axis, and are used for clamping the slide rail on the tower to prevent the wave energy power generation device from falling when the wave height is relatively stable, and at the same time relaxing when the wave height is unstable, so that the pulley moves up and down with the change of the wave height. The float is used for moving up and down with the change of the wave height to provide an input force for the combined power generation system, absorbing the kinetic energy of the wave and converting it into the potential energy of the float to make the float move vertically, and then driving the upper A-shaped plate to rotate around the back plate. The piston rod of the hydraulic press connected to the upper A-shaped plate makes a reciprocating motion in the cylinder barrel of the hydraulic press, and the conversion of hydraulic energy and mechanical energy is realized in the hydraulic press.

3. The wave and wind power combined generation system capable of lifting according to claim 2, wherein: The number of the wave energy power generation devices is 5, and they are distributed in a circular array around the tower.

4. The wave and wind power combined generation system capable of lifting according to claim 1, wherein: The fixed wind power generation device includes a generator set and a fixed platform arranged on the tower, and the generator set includes a fan rear seat and fan blades which are matched with each other.

5. The wave and wind power combined generation system capable of lifting according to claim 2, wherein: The data acquisition and processing device can monitor the water level parameters of the wave energy power generation device, and based on this, obtain the float height to adjust the height of the float of the wave energy power generation device on the slide rail. The specific steps are as follows: the data acquisition and processing device detects the real-time wave height and determines whether the float of the wave energy power generation device touches the sea level; when the float touches the sea level, there is no need to adjust the float height; when the float does not touch the sea level, the wave energy power generation device slides down along the slide rail on the tower, so that the float touches the sea level and is not completely submerged in the sea level.

6. The liftable wind-wave combined power generation system according to claim 5, wherein: A wave height judgment unit is provided in the data acquisition and processing device. The wave height judgment unit is used to determine the wave height of the combined power generation system. If the float does not contact the sea level, it controls the pulley to slide downward along the slide rail. When it reaches a suitable position, the clamping member clamps the slide rail to keep the wave energy power generation device at a fixed height. If the float contacts the sea level, it does not react. If the float completely moves below the sea level, it controls the pulley to slide upward along the slide rail. When it reaches a suitable position, the clamping member clamps the slide rail to keep the wave energy power generation device at a fixed height.

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