A floating wave energy power generation system based on adjustable wave direction floaters, a wind wave energy hybrid power generation system and a control method

Abstract

This invention belongs to the field of new energy power generation technology, specifically a floating wave energy power generation system based on an adjustable wave-facing float, a wind-wave hybrid power generation system, and a control method. The wave energy power generation system includes a floating platform and several wave energy power generation devices mounted on the platform. Each wave energy power generation device includes an oscillating float, a rotation control controller, a drive shaft, and a power generation mechanism that cooperates with the drive shaft. The oscillating float is movably connected to the floating platform. The wave-facing area of ​​the oscillating float is adjustable. The rotation control controller is movably connected to the oscillating float to adjust its wave-facing direction. The drive shaft is fixedly connected to the oscillating float and moves with the waves, thereby driving the power generation mechanism to convert mechanical energy into electrical energy. This invention, through angle adjustment, can reduce system fatigue load while achieving efficient energy capture.

Description

Technical Field

[0001] This invention belongs to the field of new energy power generation device technology, specifically relating to a floating wave energy power generation system based on an adjustable wave-direction float, a wind-wave energy hybrid power generation system, and a control method. Background Technology

[0002] As the global energy structure accelerates its transition to cleaner energy, developing and utilizing abundant marine renewable energy sources has become an important development direction. Among them, hybrid power generation systems combining floating wind and wave power generation, which utilize shared floating platforms to help reduce the cost per kilowatt-hour and smooth power output, are considered an important technological path to promote the development of deep-sea energy. This path aims to improve the comprehensive utilization efficiency of marine space by synergistically capturing wind and wave energy through a single platform system.

[0003] Currently, wind and wave hybrid power generation systems typically integrate one or more wave energy generation devices on a floating wind turbine platform. These devices often employ point-absorbing or heave-type floats to capture wave energy. To simplify design and analysis, the floats are generally designed as cylindrical, spherical, or other structures with symmetrical hydrodynamic coefficients.

[0004] However, integrating wave energy devices into floating wind turbine platforms increases the overall wave-facing area and hydrodynamic wetted surface area of ​​the system, leading to a greater average drift force in the waves. This results in higher tensile loads on the mooring cables compared to a single wind turbine platform, posing a significant challenge to the fatigue life and ultimate strength of the mooring system. Furthermore, due to the uncertainty of wave direction in the marine environment, the wave energy capture efficiency will significantly decrease when the hydrodynamically symmetrical float fails to achieve optimal matching with the incoming wave direction. Existing wind-wave hybrid power generation systems generally lack mechanisms for active adjustment based on real-time sea conditions, exhibiting poor adaptability and failing to fully utilize wave energy devices to actively suppress platform movement, thus failing to achieve system-level synergistic efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a floating wave energy power generation system, a wind and wave energy hybrid power generation system, and a control method based on an adjustable wave-facing buoy. By adjusting the wave-facing area of ​​the buoy, it can adapt to different sea conditions, improve energy capture efficiency, and extend service life.

[0006] To achieve the above objectives, the first aspect of the present invention provides a floating wave energy generation system based on an adjustable wave-direction buoy, comprising a floating platform and a plurality of wave energy generation devices disposed on the floating platform. Each of the wave energy generation devices includes an oscillating float, a rotation control controller, a drive shaft, and a power generation mechanism that cooperates with the drive shaft; the oscillating float is movably connected to the floating platform; The oscillating float has an asymmetric hydrodynamic coefficient structure, with at least two surfaces having unequal wave-facing areas; The slewing adjustment controller is movably connected to the oscillating float and is used to adjust the oscillating float's wave-facing direction; the drive shaft is connected to the oscillating float via a connecting component and is used to move the oscillating float as it moves with the waves, thereby driving the power generation mechanism to convert mechanical energy into electrical energy.

[0007] Furthermore, when the number of axes of symmetry is less than or equal to 1, the ratio of the length of the longest side to the shortest side of the cross section parallel to the sea surface is (2-10):1; when the number of axes of symmetry is greater than 1, the ratio of the lengths of two axes of symmetry with unequal lengths is (2-10):1. The cross-section parallel to the sea surface is one of the following: ellipse, rectangle, isosceles triangle, or trapezoid.

[0008] Furthermore, the slewing adjustment controller is connected to the oscillating float by a gear, which is used to drive the gear to rotate via a motor, thereby causing the oscillating float to rotate to adjust its wave-facing direction.

[0009] Furthermore, the drive shaft is connected to the floating platform via a hinge and to the oscillating float via a connecting member; the power generation mechanism is disposed on the floating platform and is connected to the drive shaft via gears.

[0010] Furthermore, the power generation mechanism is a hydraulic power generation mechanism, specifically including: a hydraulic power generation system transmission shaft meshing with the drive shaft, a rotary vane pump fixedly connected to the transmission shaft, and a hydraulic generator connected to the rotary vane pump through a hydraulic circuit; The hydraulic circuit is equipped with a control valve to regulate the flow and pressure of the hydraulic oil; a high-pressure accumulator and a low-pressure accumulator are provided between the control valve and the hydraulic generator to form a closed loop circuit.

[0011] Furthermore, the floating platform includes several columns, crossbeams, a mooring system, and ballast tanks; adjacent columns are connected by crossbeams; the floating platform is anchored to the seabed by the mooring system; the ballast tanks are used to adjust the draft and floating attitude of the floating platform by injecting or discharging ballast water into the ballast compartments.

[0012] A second aspect of the present invention provides a floating wind and wave energy hybrid power generation system based on an adjustable wave-direction float, comprising a wind power generation mechanism and a floating wave energy power generation system based on an adjustable wave-direction float as described above, wherein the wind power generation mechanism is fixed to a floating platform of the floating wave energy power generation system.

[0013] Furthermore, the wind power generation mechanism includes a wind turbine rotor, a wind turbine nacelle, wind turbine blades, and a wind turbine tower; the wind turbine tower is fixed to the floating platform; the wind turbine rotor, wind turbine nacelle, and wind turbine blades are fixed to the top of the wind turbine tower.

[0014] The third aspect of the present invention provides a control method for a floating wave energy power generation system based on an adjustable wave-direction buoy as described in any of the above claims, comprising: determining whether it is suitable for generating electricity at the highest efficiency based on the wave conditions; if suitable, adjusting the oscillating buoy through a slewing control controller to maximize the area of ​​the cross section of the oscillating buoy perpendicular to the wave direction, and generating wave energy in this state. If not suitable, the oscillating float is adjusted by the slewing control to minimize the area of ​​the cross-section of the oscillating float perpendicular to the direction of the waves, so as to reduce the influence of wave drift force.

[0015] Furthermore, it also includes: setting the tension load threshold of the mooring system, determining the relationship between the number of oscillating buoys and the wave-facing area and the tension load threshold based on the wave conditions, and then adjusting the wave-facing area of ​​different oscillating buoys for different wave conditions so that the tension load of the mooring system is lower than the tension load threshold.

[0016] In summary, compared with the prior art, the above-described technical solutions conceived by this invention mainly possess the following technical advantages: 1. The floating wave energy generation system provided by the present invention improves the wave energy capture efficiency by using an oscillating float with adjustable wave-facing area. By using a slewing adjustment controller, the float with asymmetrical hydrodynamic coefficient can be actively adjusted to the optimal posture orthogonal to the main wave direction to maximize its hydrodynamic response. Thus, under the same size, the energy capture efficiency is higher than that of traditional axisymmetric floats.

[0017] 2. In extreme sea conditions, this invention can reduce the wave drift force on the entire system by adjusting the float to the minimum resistance attitude parallel to the main wave direction, thereby reducing the peak tension and fatigue load of the mooring cable and improving the safety and survivability of the entire system in harsh environments.

[0018] 3. Based on real-time monitored wind and wave data, this invention actively adjusts the buoy's wave-facing direction through a slewing control controller, switching between "maximum power generation mode" and "minimum load mode," enabling the system to operate with the optimal strategy under different sea conditions, achieving a dynamic balance between power generation efficiency and structural safety, and possessing higher environmental adaptability.

[0019] 4. The present invention preferably uses an elliptical cylindrical float, with a rotation control controller located at its center, capable of driving the float to rotate around its vertical central axis. This structure has a large difference in length between its major and minor axes, making it more adaptable to wave conditions. Furthermore, its streamlined surface provides more stable buoyancy and reduces energy loss, thus improving energy conversion efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the wind and wave energy hybrid power generation system of the present invention; Figure 2 This is a top view of the wind and wave energy hybrid power generation system of the present invention; Figure 3 This is a schematic diagram of the wave energy generation device of the present invention; Figure 4 This is a schematic diagram of the hydraulic power generation system of the wave energy power generation device of the present invention; In all the accompanying drawings, the same reference numerals are used to denote the same elements or structures, wherein: 100-Floating platform; 1-Wind turbine rotor; 2-Wind turbine nacelle; 3-Wind turbine blade; 4-Wind turbine tower; 5-Crossbeam; 6-Column; 7-Wave energy power generation device; 8-Mooring system; 9-Hydraulic power generation system drive shaft; 10-Drive shaft; 11-Connecting component; 12-Slewing regulating controller; 13-Oscillating float; 14-Rotary blade pump; 15-Control valve; 16-High-voltage accumulator; 17-Low-voltage accumulator; 18-Hydraulic generator. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0022] Example 1 Please see Figure 1-4 The present invention provides a floating wave energy power generation system based on an adjustable wave-direction float, including a floating platform 100 and a plurality of wave energy power generation devices 7 disposed on the floating platform 100. Each of the wave energy generation devices 7 includes an oscillating float 13, a rotation regulating controller 12, a drive shaft 10, and a power generation mechanism that cooperates with the drive shaft 10; the oscillating float 13 is movably connected to the floating platform 100; The oscillating float 13 has a polyhedral structure, specifically an asymmetric hydrodynamic coefficient structure, with at least two surfaces having unequal wave-facing areas. The wave-facing area of ​​this invention refers to the surface area of ​​the oscillating float that is in contact with the direction of the incoming wave. Different areas of the wave acting on the surface of the oscillating float 13 result in different forces acting on it, leading to different power generation intensity and loads on the power generation system. By adjusting the wave-facing area, the power generation intensity and the load on the power generation system can be balanced, thereby ensuring the stability and service life of the system and maximizing power generation efficiency.

[0023] The slewing adjustment controller 12 is movably connected to the oscillating float 13 and is used to adjust the wave-facing direction of the oscillating float 13 (i.e., adjust the wave-facing area); the drive shaft 10 is fixedly connected to the oscillating float 13 through the connecting member 11 and is used to move the oscillating float 13 with the wave motion, thereby driving the power generation mechanism to convert mechanical energy into electrical energy.

[0024] As a further limitation, at least one cross-section of the oscillating float 13 parallel to the sea surface satisfies the following conditions: the number of its axes of symmetry is less than or equal to 1; or when the number of its axes of symmetry is greater than 1, at least two of the axes of symmetry have unequal lengths. Specifically, when the number of axes of symmetry is less than or equal to 1, the ratio of the longest side to the shortest side of the cross-section of the oscillating float 13 parallel to the sea surface is 2-10:1; when the number of axes of symmetry is greater than 1, the ratio of the lengths of the two unequal axes of symmetry is 2-10:1. Preferably, the cross-section of the oscillating float 13 parallel to the sea surface is one or more combinations of ellipse, rectangle, isosceles triangle, and trapezoid. For example... Figure 3 As shown, the cross-section of the present invention is preferably elliptical, so the oscillating float 13 is an elliptical cylinder structure. On this basis, a cone or hemispherical structure can also be attached above or below it. That is, as long as at least part of the cross-section parallel to the sea surface meets the above-mentioned requirements, even if the cross-sections at other heights are centrally symmetrical structures, the overall wave-facing area can still be unequal.

[0025] The floating platform 100 includes several columns 6, crossbeams 5, a mooring system 8, and ballast tanks; adjacent columns 6 are connected by crossbeams 5; the floating platform 100 is anchored to the seabed by the mooring system 8; the ballast tanks are used to adjust the draft and floating attitude of the floating platform 100 by injecting or discharging ballast water into the ballast compartments, ensuring overall stability. The platform is anchored to the seabed by the mooring system, achieving long-term reliable position maintenance.

[0026] Specifically, there are 3 columns and 3 beams, forming a triangular frame structure.

[0027] The wave energy power generation device 7 uses a float with an asymmetric hydrodynamic coefficient. The float is connected to the floating platform through a connecting component. Under the excitation of waves, the float moves around the drive shaft, and then converts mechanical energy into electrical energy through the hydraulic power generation system.

[0028] The rotation adjustment controller 12 is connected to the oscillating float 13 by a gear. The gear is driven by a motor to rotate, thereby rotating the oscillating float 13 to adjust its direction against waves. Simultaneously, the gear's limiting mechanism prevents waves from changing their direction. Preferably, the oscillating float 13 has an internal gear groove at its center, and the rotation adjustment controller 12 has an external gear (not shown in the figure) that meshes with it. The external gear is fitted into the internal gear to achieve rotational adjustment.

[0029] With this configuration, the slewing control controller 12 can drive the float to rotate around its vertical central axis. The slewing control controller can adaptively adjust the float's wave-facing angle, thereby achieving optimal operation under different conditions. Specifically, under normal power generation conditions, the float's major elliptical axis is adjusted to be perpendicular to the main wave direction to maximize the wave-facing profile and improve energy capture efficiency; while under extreme sea states, it is adjusted to be parallel to the main wave direction to minimize the wave-facing profile, thus significantly reducing the wave drift force on the entire system, reducing the load on the mooring system, and ensuring the safety of the entire system.

[0030] In some specific implementations, the floating wave energy generation system is equipped with angle sensors and wave sensors. The angle sensors determine the rotation angle and orientation of the oscillating buoy 13, thereby enabling accurate adjustment of its wave-facing area according to the wave direction. The wave sensors can be acoustic Doppler wave meters, high-frequency ground wave radar, etc., which transmit sound waves / electromagnetic waves, receive wave reflection signals, and analyze the Doppler frequency shift and phase change of the signals to determine the wave propagation direction. In particular, a wave intensity testing module is also provided, for example, by using acoustic wave meters or optical wave meters to collect wave parameters in real time and calculate the intensity level; or by directly measuring wave height and period through wave buoys to calculate the effective wave height and wave energy density. Based on the wave intensity and the load threshold of the mooring system 8, the wave-facing area of ​​all oscillating buoys can be reasonably calculated, thereby enabling regulation.

[0031] The drive shaft 10 is hinged to the floating platform 100 and movably connected to the oscillating float 13 via a connecting member 11. Figure 3When the connecting component 11 is connected to the slewing adjustment controller 12, it is not directly connected to the rotating gear of the slewing adjustment controller 12. It is necessary to ensure that the connecting component 11 does not rotate with it. The power generation mechanism is set on the floating platform 100 and is connected to the drive shaft 10 through gears. The power generation mechanism is a hydraulic power generation mechanism, specifically including: a hydraulic power generation system transmission shaft 9 meshing with the drive shaft 10, a rotary vane pump 14 fixedly connected to the transmission shaft 9, and a hydraulic generator 18 connected to the rotary vane pump 14 through a hydraulic circuit. The hydraulic circuit is equipped with a control valve 15 for regulating the flow and pressure of hydraulic oil; a high-pressure accumulator 16 and a low-pressure accumulator 17 are provided between the control valve 15 and the hydraulic generator 18 to form a closed loop circuit.

[0032] Specifically, the drive shaft 10 is movably connected to the crossbeam 5 via a hinge. For example, a hinge ring is provided outside the crossbeam 5, and the drive shaft 10 is fitted inside the hinge ring. A gear is provided on the drive shaft 10, and the hydraulic power generation system transmission shaft 9 is provided on the crossbeam 5, with a gear that meshes with the drive shaft 10.

[0033] The present invention also provides a control method for a floating wave energy power generation system based on an adjustable wave-direction buoy as described in any of the above claims, comprising: determining whether it is suitable for generating electricity at the highest efficiency according to the wave conditions; if suitable, adjusting the oscillating buoy 13 through the slewing adjustment controller 12 to maximize the area of ​​the cross section of the oscillating buoy 13 perpendicular to the wave direction, and generating wave energy in this state. If not suitable, the oscillating float 13 is adjusted by the slewing adjustment controller 12 to minimize the area of ​​the cross section of the oscillating float 13 perpendicular to the direction of the waves, so as to reduce the influence of wave drift force.

[0034] Furthermore, it also includes: setting the tension load threshold of the mooring system 8, determining the relationship between the number of oscillating floats 13 and the wave-facing area and the tension load threshold according to the wave conditions, and then adjusting the wave-facing area of ​​different oscillating floats 13 for different wave conditions so that the tension load of the mooring system 8 is lower than the tension load threshold.

[0035] This invention can set a threshold for wave height or intensity, defining wave conditions below the threshold as suitable and wave conditions above or equal to the threshold as unsuitable.

[0036] Example 2 like Figure 1 and Figure 2As shown, this invention provides a floating wind and wave energy hybrid power generation system based on an adjustable wave-direction buoy. The system generally includes a centrally located wind turbine generator, a floating platform 100 for supporting the wind turbine generator, multiple wave energy generation devices 7 arranged around the perimeter of the platform, and a mooring system 8 for positioning the entire platform. The wind turbine generator is a conventional NREL-5MW wind turbine, which includes a turbine rotor 1, a turbine nacelle 2, turbine blades 3, and a turbine tower 4. The floating platform 100 is a semi-submersible platform, with crossbeams 5 between the columns 6 providing installation foundations for the wave energy generation devices 7. The turbine tower 4 is fixed to the floating platform 100; the turbine rotor 1, turbine nacelle 2, and turbine blades 3 are fixed to the top of the turbine tower 4.

[0037] Figure 3 The specific structure of a single wave energy generation device 7 is shown. Its core component is an elliptical cylindrical float, which adopts an asymmetric design of hydrodynamic coefficients and is the key to achieving efficient wave energy capture and load control in this invention. A rotation adjustment controller 12 is provided on the top of the float to adjust the float's direction according to the real-time wave direction. The float is connected to the drive shaft 10 through a connecting component 11, enabling it to rise, fall, and roll around the drive shaft (10) under the action of waves, thereby driving the reciprocating motion of the hydraulic power generation system transmission shaft 9, and finally realizing the conversion of mechanical energy into electrical energy through the hydraulic power generation system.

[0038] like Figure 4 As shown, the hydraulic power generation system used in the wave energy power generation device is further illustrated. Driven by the movement of a float, the hydraulic power generation system (9) drives a rotary vane pump (14) to convert mechanical energy into hydraulic energy, generating high-pressure hydraulic oil. A control valve (15) is installed in the hydraulic circuit to regulate flow and pressure. To smooth the energy pulsations caused by the periodicity of waves, the system is also equipped with a high-pressure accumulator (16) and a low-pressure accumulator (17). The high-pressure oil drives the hydraulic generator (18) to generate electricity, and the low-pressure oil, after energy conversion, returns to the low-pressure accumulator (17), forming a complete closed-loop circuit.

[0039] The working principle and adjustment method of this invention are as follows: Under normal sea conditions for power generation, the control system will adjust according to the main wave direction, such as... Figure 2 As indicated by the arrows, the major axis of the ellipse of all the elliptical cylindrical floats 13 is adjusted to an angle perpendicular to the wave direction by the slewing adjustment controller 12. In this posture, the floats have the largest wave-facing area, which can absorb wave energy most fully, thereby driving the hydraulic system to generate electricity with maximum efficiency.

[0040] In extreme sea conditions, to ensure the survival of the entire system, the slewing control controller 12 will drive all elliptical cylindrical floats 13 to rotate 90 degrees, adjusting their major axes to an angle parallel to the wave direction. In this attitude, the floats are streamlined, with the smallest wave-facing area, reducing the wave drift force and thus decreasing the tension load on the mooring system 8, ensuring that the entire wind and wave hybrid power generation system can safely withstand extreme environments.

[0041] In summary, this invention provides a floating wind-wave energy hybrid power generation system based on an adjustable wave-direction buoy, which can achieve a synergistic improvement in efficient energy capture and system safety, overcoming the problems of low wave energy capture efficiency, excessive mooring load due to large average drift force, and insufficient adaptability to changing sea conditions in existing wind-wave energy hybrid power generation systems. Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A floating wave energy generation system based on an adjustable wave-direction buoy, characterized in that, It includes a floating platform (100) and several wave energy generation devices (7) installed on the floating platform (100). Each of the wave energy generation devices (7) includes an oscillating float (13), a rotation control controller (12), a drive shaft (10), and a power generation mechanism that cooperates with the drive shaft (10); the oscillating float (13) is movably connected to the floating platform (100); The oscillating float (13) has an asymmetric hydrodynamic coefficient structure, with at least two surfaces having unequal wave-facing areas; The slewing adjustment controller (12) is movably connected to the oscillating float (13) and is used to adjust the wave-facing direction of the oscillating float (13); the drive shaft (10) is connected to the oscillating float (13) through the connecting member (11) and is used to move the oscillating float (13) with the wave, thereby driving the power generation mechanism to convert mechanical energy into electrical energy. The cross-section of the oscillating float (13) parallel to the sea surface is elliptical; the slewing control controller (12) can drive the oscillating float (13) to rotate around its vertical central axis. Through the slewing control controller (12), the wave angle of the oscillating float (13) can be adaptively adjusted; under normal power generation conditions, the major axis of the ellipse of the oscillating float (13) is adjusted to be perpendicular to the main wave direction to maximize the wave-facing profile; under extreme sea conditions, it is adjusted to be parallel to the main wave direction to minimize the wave-facing profile.

2. The floating wave energy generation system based on an adjustable wave-direction buoy according to claim 1, characterized in that, The ratio of the maximum to the minimum wave-facing area is (1.5-10):

1.

3. The floating wave energy generation system based on an adjustable wave-direction buoy according to claim 2, characterized in that, The slewing adjustment controller (12) and the oscillating float (13) are connected by gears, which are used to drive the gears to rotate by a motor, thereby driving the oscillating float (13) to rotate to adjust its wave direction.

4. The floating wave energy generation system based on an adjustable wave-direction buoy according to claim 1, characterized in that, The drive shaft (10) is connected to the floating platform (100) by a hinge and to the oscillating float (13) by a connecting member (11); the power generation mechanism is set on the floating platform (100) and is connected to the drive shaft (10) by a gear.

5. The floating wave energy generation system based on an adjustable wave-direction buoy according to claim 4, characterized in that, The power generation mechanism is a hydraulic power generation mechanism, specifically including: a hydraulic power generation system transmission shaft (9) meshing with the drive shaft (10), a rotary vane pump (14) fixedly connected to the transmission shaft (9), and a hydraulic generator (18) connected to the rotary vane pump (14) through a hydraulic circuit. The hydraulic circuit is equipped with a control valve (15) for regulating the flow and pressure of hydraulic oil; a high-pressure accumulator (16) and a low-pressure accumulator (17) are provided between the control valve (15) and the hydraulic generator (18) to form a closed loop circuit.

6. The floating wave energy generation system based on an adjustable wave-direction buoy according to any one of claims 1-5, characterized in that, The floating platform (100) includes several columns (6), crossbeams (5), a mooring system (8), and ballast tanks; adjacent columns (6) are connected by crossbeams (5); the floating platform (100) is anchored to the seabed by the mooring system (8); the ballast tanks are used to adjust the draft and floating attitude of the floating platform (100) by injecting or discharging ballast water into the ballast compartments.

7. A floating wind and wave energy hybrid power generation system based on an adjustable wave-direction buoy, characterized in that, Includes a wind power generation mechanism and a floating wave energy generation system based on an adjustable wave-direction float as described in any one of claims 1-6, wherein the wind power generation mechanism is fixed on the floating platform (100) of the floating wave energy generation system.

8. The floating wind and wave energy hybrid power generation system based on an adjustable wave-direction buoy according to claim 7, characterized in that, The wind power generation mechanism includes a wind turbine rotor (1), a wind turbine nacelle (2), wind turbine blades (3), and a wind turbine tower (4); the wind turbine tower (4) is fixed on the floating platform (100); the wind turbine rotor (1), the wind turbine nacelle (2), and the wind turbine blades (3) are fixed on the top of the wind turbine tower (4).

9. A control method for a floating wave energy generation system based on an adjustable wave-direction buoy as described in any one of claims 1-6, characterized in that, include: Determine whether it is suitable for generating electricity at the highest efficiency based on the wave conditions. If it is suitable, adjust the oscillating float (13) through the slewing adjustment controller (12) to maximize the area of ​​the cross section of the oscillating float (13) perpendicular to the wave direction, and generate wave energy in this state. If not suitable, the oscillating float (13) is adjusted by the slewing adjustment controller (12) to minimize the area of ​​the cross section of the oscillating float (13) perpendicular to the direction of the waves, so as to reduce the influence of wave drift force.

10. The control method for a floating wave energy generation system based on an adjustable wave-direction buoy according to claim 9, characterized in that, Also includes: Set the tension load threshold of the mooring system (8), determine the relationship between the number of oscillating floats (13) and the wave-facing area and the tension load threshold according to the wave conditions, and then adjust the wave-facing area of ​​different oscillating floats (13) for different wave conditions so that the tension load of the mooring system (8) is lower than the tension load threshold.

Images