Floating type wind energy-distance-adjustable swing type wave energy combined power generation device

Abstract

The invention discloses a floating type wind energy-distance-adjustable wave energy combined power generation device which comprises a wind power generation module, a distance-adjustable wave energy power generation module and a floating type platform. The wind power generation module and the wave power generation module are both mounted on the floating platform; the distance-adjustable wave power generation module comprises a hydraulic system, a first hydraulic cylinder, a connecting arm, a floater and a second hydraulic cylinder; one end of the second hydraulic cylinder is connected with the floater, and the other end is connected with one end of the connecting arm; one end of the first hydraulic cylinder is hinged to the middle of the connecting arm, and the other end of the first hydraulic cylinder is hinged to a tower of the wind power generation module. And the other end of the connecting arm is also hinged to the tower drum of the wind power generation module. Wind energy power generation and wave energy power generation are combined, offshore renewable energy sources are fully utilized, and the floating platform is suitable for larger water depth; meanwhile, the platform load can be reduced by controlling the wave energy power generation device, and the reliability and safety of the integrated power generation system are improved.

Description

Technical Field

[0001] The invention belongs to the field of ocean energy utilization, and in particular relates to a floating wind energy-adjustable pitch pendulum wave energy combined power generation device. Background Art

[0002] With the development of the global economy, energy demand has increased dramatically, and the consumption of traditional fossil energy (such as coal, oil and natural gas) has led to serious environmental pollution and greenhouse gas emissions. Countries have begun to look for more environmentally friendly and sustainable energy alternatives. Wind energy, as a clean and renewable energy source, has become an important research and development object. Although land wind energy resources are abundant, with large-scale development, suitable wind resources are gradually decreasing. The locations on land that can be used for wind power generation are often limited and are easily restricted by factors such as terrain, land use, noise and visual impact. Relatively speaking, the ocean has vast space and stronger and more stable wind resources, which are suitable for large-scale development.

[0003] The movement of waves on the ocean surface contains a large amount of energy. This energy is not only relatively stable but also has a high density, which can provide sustainable electricity supply for coastal areas. Compared with wind and solar energy, wave energy is less affected by seasonal and diurnal changes. However, the conversion efficiency of wave energy power generation devices is low and the unit power generation cost is high, which limits its large-scale commercial application. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention proposes a floating wind energy-adjustable pitch pendulum wave energy combined power generation device, which fully utilizes two different offshore renewable energy sources, wind energy and wave energy, to smooth out fluctuations in energy supply while providing more stable and reliable energy output with high power generation efficiency. It can effectively alleviate the problem of power supply shortage in coastal cities and reduce the cost of wind and wave power generation.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A floating wind energy-adjustable pitch pendulum wave energy combined power generation device, comprising a wind power generation module, an adjustable pitch wave energy power generation module and a floating platform;

[0007] The wind power generation module and the wave power generation module are both installed on the floating platform;

[0008] The adjustable pitch wave energy power generation module includes a hydraulic system, a first hinge, a first hydraulic cylinder, a second hinge, a third hinge, a connecting arm, a float and a second hydraulic cylinder; one end of the second hydraulic cylinder is connected to the float, and the other end is connected to one end of the connecting arm; one end of the first hydraulic cylinder is hinged to the middle part of the connecting arm through the second hinge, and the other end of the first hydraulic cylinder is hinged to the tower of the wind power generation module through the first hinge; the other end of the connecting arm is also hinged to the tower of the wind power generation module through the third hinge.

[0009] Furthermore, the wind power generation module includes a tower and a wind turbine generator disposed at the top of the tower;

[0010] The floating platform is arranged at the bottom of the tower and connected to the seabed through an anchor chain; the floating platform includes a truss structure and a pontoon; there are three pontoons, which are spaced 120 degrees apart and distributed in a triangle, and the tower is located at the center of the triangle formed by the three pontoons, and the three pontoons and the tower are fixedly connected by the truss structure.

[0011] Furthermore, there are three adjustable-pitch wave energy power generation modules, which are evenly distributed around the floating platform, with an angle of 120° between them, and are complementary to the angular positions of the three buoys of the floating platform.

[0012] Further, the hydraulic system includes an oil tank, a first filter, a second filter, an oil pump, a relief valve, a first speed regulating valve, a first check valve, a first solenoid valve, a second solenoid valve, a third solenoid valve, a second speed regulating valve, a third speed regulating valve, a second check valve, a third check valve, a first pressure gauge, a second pressure gauge, a third pressure gauge, a wave energy generator and a battery;

[0013] The first filter and the second filter are located in the oil tank, the oil outlet of the oil tank is connected to the inlet of the oil pump through the first filter, the outlet of the oil pump is divided to the overflow valve and then returns to the oil tank, and the outlet of the oil pump also reaches the P port of the first solenoid valve through the first check valve; the T port of the first solenoid valve is regulated by the first speed regulating valve, and then filtered by the second filter and returns to the oil tank; the A port of the first solenoid valve is divided into two oil paths, one is connected to the P port of the second solenoid valve through the second speed regulating valve and the second check valve, and the other is connected to the P port of the third solenoid valve through the third speed regulating valve and the third check valve; the T ports of the second solenoid valve and the third solenoid valve are connected to the B port of the first solenoid valve;

[0014] The A port of the second solenoid valve is connected to the piston chamber at one end of the first hydraulic cylinder, and the B port of the second solenoid valve is connected to the piston chamber at the other end of the first hydraulic cylinder; the A port of the third solenoid valve is connected to the piston chamber at one end of the second hydraulic cylinder, and the B port of the third solenoid valve is connected to the piston chamber at the other end of the second hydraulic cylinder; the first oil circuit port of the wave energy generator is respectively connected to the piston chamber at one end of the first hydraulic cylinder and the second hydraulic cylinder, and the second oil circuit port of the wave energy generator is respectively connected to the piston chamber at the other end of the first hydraulic cylinder and the second hydraulic cylinder, and the wave energy generator is electrically connected to the battery; the first pressure gauge is installed in the oil tank, the second pressure gauge is installed in the piston chamber at one end of the first hydraulic cylinder, and the third pressure gauge is installed in the piston chamber at one end of the second hydraulic cylinder.

[0015] Furthermore, the first hydraulic cylinder and the second hydraulic cylinder are both double-stroke hydraulic cylinders.

[0016] Furthermore, the adjustable-pitch wave energy power generation module also includes a wave height meter for detecting wave height in real time.

[0017] A control method for a floating wind energy-adjustable pitch pendulum wave energy combined power generation device, the method comprising:

[0018] Monitor the wave height h in real time. When the wave height exceeds the range of the adjustable distance capability, adjust the first solenoid valve, the second solenoid valve and the third solenoid valve to the position of channel 1. At this time, the oil in the oil tank is shunted by the pressure of the oil pump through the first one-way valve, and the oil path of channel 1 of the first solenoid valve is diverted through the second speed regulating valve and the third speed regulating valve to reach the piston chamber at one end of the first hydraulic cylinder and the second hydraulic cylinder. The first hydraulic cylinder and the second hydraulic cylinder are both under active control. The first hydraulic cylinder shortens the arm length, lifts the float away from the sea surface through the connecting arm, stops working, and locks the entire wave energy power generation device in the air to avoid possible damage to the equipment caused by extreme sea conditions. At this time, it is in the shutdown state;

[0019] Monitor the wave height h in real time. When the wave height falls back to the range of the adjustable distance capability, adjust the position of the first solenoid valve to channel 1, the second solenoid valve to channel 2, and the third solenoid valve to channel 1. The oil in the oil tank is subject to the pressure of the oil pump through the first one-way valve, and the oil path along channel 1 of the first solenoid valve is diverted through the second speed regulating valve and the third speed regulating valve. The first hydraulic cylinder is in the passive motion stage and is in the power generation state; the second hydraulic cylinder is under active control, and the position of the second hydraulic cylinder is adjusted by active control to adjust the length of the vibration force arm of the float; this is a transitional state, and only the first hydraulic cylinder generates electricity; at this time, the float rises and falls under the action of seawater, driving the connecting arm to swing around the third hinge, and at the same time, the relative movement of the floating platform and the connecting arm causes the first hydraulic cylinder to reciprocate, driving the hydraulic system to operate and driving the wave energy generator to rotate and generate electricity, converting wave energy into electrical energy;

[0020] After the float is in the transition stage for a preset time, the lock of the second hydraulic cylinder is released, the first solenoid valve is adjusted to be in channel 2, the active oil circuit of the oil pump stops working, the second solenoid valve and the third solenoid valve are both in channel 2, at this time, the first hydraulic cylinder and the second hydraulic cylinder are both in a passive control state, the first hydraulic cylinder and the second hydraulic cylinder both follow the vibration of the waves to reciprocate, generate power generation hydraulic strokes, drive the wave energy generator to rotate and generate electricity, and convert wave energy into electrical energy; this is the double-cylinder working state.

[0021] Furthermore, in the transition state, for different wave height intervals, the extended length of the piston rod of the second hydraulic cylinder is actively controlled and adjusted to be different; and the extended length of the piston rod of the second hydraulic cylinder is locked by a one-way valve.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention is based on a floating platform, combines a wind power generation module and a wave power generation module, and integrates them into a joint power generation device, which makes full use of offshore renewable energy and reduces the power generation cost of wind and wave energy. The floating platform can expand the scope of use, be applicable to a greater water depth, and be more widely used. At the same time, the platform load is reduced by controlling the wave power generation device, thereby improving the reliability and safety of the integrated power generation system.

[0024] 2. The control method of the wave energy power generation device of the present invention can improve the stability of the entire combined power generation device and reduce the structural load.

[0025] 3. The control method of the wave energy power generation device of the present invention has a transition phase, which helps to improve the stability of power generation and extend the service life of the entire device.

[0026] 4. The symmetrical distribution of the wave energy power generation device helps to improve the stability of the floating platform. The length of the connecting arm of the float can be adjusted according to the sea conditions to stabilize the working state. In extreme sea conditions, the wave energy power generation device can also be lifted and locked to improve the safety performance of the entire combined power generation device.

[0027] 5. The wave energy combined power generation device of the present invention improves the effective utilization rate of deep-sea energy, reduces construction costs and maintenance costs, reduces the risks that a single energy system may face, and improves the reliability of the entire energy supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of a floating wind energy-adjustable pitch wave energy combined power generation device in an embodiment of the present invention.

[0029] Figure 2It is a schematic structural diagram of an adjustable-pitch wave energy power generation module in an embodiment of the present invention.

[0030] Figure 3 It is a control principle flow chart of the hydraulic system in an embodiment of the present invention.

[0031] Figure 4 The figure is a control flow chart of the three state switching of the adjustable-distance wave energy power generation module in an embodiment of the present invention.

[0032] Figure 5 It is a hydraulic circuit diagram of the shutdown state of the adjustable pitch wave energy power generation module in an embodiment of the present invention.

[0033] Figure 6 It is a hydraulic circuit diagram of the transition state of the adjustable pitch wave energy power generation module in the embodiment of the present invention.

[0034] Figure 7 It is a hydraulic circuit diagram of the dual-cylinder state of the adjustable-distance wave energy power generation module in an embodiment of the present invention.

[0035] In the figure: wind turbine 1, tower 2, truss structure 3, buoy 4, anchor chain 5, adjustable distance wave energy power generation module 6, hydraulic system 7, first hinge 8, first hydraulic cylinder 9, second hinge 10, third hinge 11, connecting arm 12, float 13, second hydraulic cylinder 14, oil tank 701, first filter 702, second filter 703, oil pump 704, overflow valve 705, first speed regulating valve 706, first check valve 707, first solenoid valve 708, second solenoid valve 709, third solenoid valve 710, second speed regulating valve 711, third speed regulating valve 712, second check valve 713, third check valve 714, first pressure gauge 715, second pressure gauge 716, third pressure gauge 717, wave energy generator 718, battery 719. DETAILED DESCRIPTION

[0036] The present invention will be described in detail below based on the accompanying drawings and preferred embodiments, and the purpose and effects of the present invention will become more clear. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0037] like Figure 1 As shown, the floating wind energy-adjustable pitch wave energy combined power generation device of this embodiment includes a wind power generation module, an adjustable pitch wave energy generation module 6 and a floating platform. Among them:

[0038] The wind power generation module includes a tower 2 and a wind turbine 1 disposed at the top of the tower 2. The wind turbine 1 is a 5MW horizontal axis wind turbine, and the blades rotate under the action of wind, converting wind energy into rotational mechanical energy, thereby driving the wind turbine 1 to generate electricity.

[0039] The floating platform is arranged at the bottom of the tower 2, and the floating platform is connected to the seabed through an anchor chain. The floating platform includes a truss structure 3 and a pontoon 4. There are three pontoons 4, and the three pontoons 4 are spaced 120° apart and distributed in a triangle. The tower 2 is located at the center of the triangle distribution formed by the three pontoons 4, and the three pontoons 4 and the tower 2 are fixedly connected by the truss structure 3. The floating platform is a semi-submersible platform, and the floating platform is connected to the seabed through an anchor chain 5. The floating platform based on the truss structure has a simple structure, convenient construction, low installation cost, and a wide range of applicable water depths. At the same time, the truss structure can effectively reduce the platform load, thereby improving the reliability and safety of the integrated power generation system.

[0040] The adjustable-pitch wave energy power generation module 6 is a floating pendulum wave energy power generation device. Three groups of adjustable-pitch wave energy power generation modules 6 are symmetrically distributed around the tower 2 of the floating platform, with an angle of 120° between them, and are complementary to the angular positions of the three buoys 4 of the platform.

[0041] like Figure 2 As shown, the adjustable pitch wave energy power generation module 6 includes a hydraulic system 7, a first hinge 8, a first hydraulic cylinder 9, a second hinge 10, a third hinge 11, a connecting arm 12, a float 13 and a second hydraulic cylinder 14. One end of the second hydraulic cylinder 14 is connected to the float 13, and the other end is connected to one end of the connecting arm 12; one end of the first hydraulic cylinder 9 is hinged to the middle of the connecting arm 12 through the second hinge 10, and the other end of the first hydraulic cylinder 9 is connected to the tower 2 through the first hinge 8. The other end of the connecting arm 12 is hinged to the tower 2 through the third hinge 11. The connecting arm 12 adopts a double triangle type to ensure the high stability of the structure.

[0042] like Figure 3As shown, the hydraulic system 7 is fixed on the tower 2, and the hydraulic system 7 includes an oil tank 701, a first filter 702, a second filter 703, an oil pump 704, a relief valve 705, a first speed regulating valve 706, a first non-return valve 707, a first solenoid valve 708, a second solenoid valve 709, a third solenoid valve 710, a second speed regulating valve 711, a third speed regulating valve 712, a second non-return valve 713, a third non-return valve 714, a first pressure gauge 715, a second pressure gauge 716, a third pressure gauge 717, a wave energy generator 718 and a battery 719. The first filter 702 and the second filter 703 are located in the oil tank 701. The oil outlet of the oil tank 701 is connected to the inlet of the oil pump 704 through the first filter 702. The outlet of the oil pump 704 is diverted to the overflow valve 705 and then returns to the oil tank 701. The outlet of the oil pump 704 also reaches the P port of the first solenoid valve 708 through the first check valve 707. The T port of the first solenoid valve 708 is adjusted by the first speed regulating valve 706, and then filtered by the second filter 703 and returns to the oil tank 701. The A port of the first solenoid valve 708 is divided into two oil paths, one of which is connected to the P port of the second solenoid valve 709 through the second speed regulating valve 711 and the second check valve 703, and the other is connected to the P port of the third solenoid valve 710 through the third speed regulating valve 712 and the third check valve 714. The T ports of the second solenoid valve 709 and the third solenoid valve 710 are connected to the B port of the first solenoid valve 708.

[0043] The A port of the second solenoid valve 709 is connected to the piston chamber at one end of the first hydraulic cylinder 9, and the B port of the second solenoid valve 709 is connected to the piston chamber at the other end of the first hydraulic cylinder 9; the A port of the third solenoid valve 710 is connected to the piston chamber at one end of the second hydraulic cylinder 14, and the B port of the third solenoid valve 710 is connected to the piston chamber at the other end of the second hydraulic cylinder 14; the first oil port of the wave energy generator 718 is respectively connected to the piston chamber at one end of the first hydraulic cylinder 9 and the second hydraulic cylinder 14, and the second oil port of the wave energy generator 718 is respectively connected to the piston chamber at the other end of the first hydraulic cylinder 9 and the second hydraulic cylinder 14, and the wave energy generator 718 is electrically connected to the battery 718. The first pressure gauge 715 is installed in the oil tank 701, the second pressure gauge 716 is installed in the piston chamber at one end of the first hydraulic cylinder 9, and the third pressure gauge 717 is installed in the piston chamber at one end of the second hydraulic cylinder 14.

[0044] The first hydraulic cylinder 9 and the second hydraulic cylinder 14 are both double-stroke hydraulic cylinders, which can improve the energy capture efficiency of the wave energy power generation device. The second hydraulic cylinder 14 also acts as a distance-adjusting hydraulic cylinder, which can change the length of the connecting arm according to the size of the waves, effectively reducing the platform load and improving the stability of the integrated power generation system.

[0045] The first speed regulating valve 706, the second speed regulating valve 711 and the third speed regulating valve 712 are used to adjust the flow of the hydraulic system, so as to control the damping of the first hydraulic cylinder 9 and the second hydraulic cylinder 14 hinged between the tower 2 and the connecting arm 12, and reduce the motion response of the floating platform through the interaction force between the second hydraulic cylinder 14 hinged between the tower 2 and the connecting arm 12 and the buoy 2; the first one-way valve 707, the second one-way valve 713 and the third one-way valve 714 are used to close the hydraulic system oil circuit and lock the hydraulic cylinder, so as to achieve the locking of the length of the connecting arm of the wave energy power generation device and the lifting and shutdown of the wave energy power generation device.

[0046] The adjustable-distance wave energy power generation module 6 also includes a wave height meter for detecting wave height in real time.

[0047] The working principle of the adjustable distance wave energy power generation module 6 is as follows: the float 13 rises and falls under the action of sea water, the piston rod of the second hydraulic cylinder 14 reciprocates, and at the same time, drives the connecting arm 12 to swing up and down around the third hinge 11, and the piston rod of the first hydraulic cylinder 9 reciprocates, driving the hydraulic system 7 to operate and drive the wave energy generator 718 to rotate and generate electricity, thereby converting wave energy into electrical energy.

[0048] The adjustable-pitch wave energy power generation module 6 has three modes: transition state, lock state and dual-cylinder working state according to the real-time monitoring of wave height. Figure 4 As shown, the specific control process is as follows:

[0049] Real-time monitoring of wave height h, when the wave height is beyond the range of distance adjustment capability, such as Figure 5 As shown, the first solenoid valve 708, the second solenoid valve 709 and the third solenoid valve 710 are all adjusted to the position of channel 1. At this time, the oil in the oil tank 701 is shunted by the pressure of the oil pump 704 through the first one-way valve 707, along the oil path of channel 1 of the first solenoid valve 708, through the second speed regulating valve 711 and the third speed regulating valve 712 to reach the piston chamber at one end of the first hydraulic cylinder 9 and the second hydraulic cylinder 14. The first hydraulic cylinder 9 and the second hydraulic cylinder 14 are both under active control. The first hydraulic cylinder 9 shortens the arm length, lifts the float 13 away from the sea surface through the connecting arm 12, stops working, and locks the entire wave energy power generation device in the air to avoid possible damage to the equipment caused by extreme sea conditions. At this time, it is in the shutdown state.

[0050] Real-time monitoring of wave height h, when the wave height falls back to the range of the distance adjustment capability, such as Figure 6As shown, the position of the first solenoid valve 708 is adjusted to channel 1, the second solenoid valve 709 is at channel 2, and the third solenoid valve 710 is at channel 1. The oil in the oil tank 701 is subject to the pressure of the oil pump 704 through the first one-way valve 707, and is diverted along the oil path of channel 1 of the first solenoid valve 708 through the second speed regulating valve 711 and the third speed regulating valve 712. The first hydraulic cylinder 9 is in the passive motion stage and is in the power generation state; the second hydraulic cylinder 14 is under active control, and the position of the second hydraulic cylinder 14 is adjusted by active control to adjust the length of the vibration force arm of the float 13. This is a transitional state, and only the first hydraulic cylinder 9 generates electricity. At this time, the float 13 rises and falls under the action of seawater, driving the connecting arm 12 to swing around the third hinge 11. At the same time, the relative movement of the floating platform and the connecting arm 12 causes the first hydraulic cylinder 9 to reciprocate, driving the hydraulic system 7 to operate and driving the wave energy generator 718 to rotate and generate electricity, converting the wave energy into electrical energy. In the transition state, for different wave height intervals, the extended length of the piston rod of the second hydraulic cylinder 14 is actively controlled and adjusted to be different; and the extended length of the piston rod of the second hydraulic cylinder 14 is locked by a one-way valve.

[0051] After the float 13 is in the transition stage for a preset time, for example, 1 hour, the lock of the second hydraulic cylinder 14 is released. Figure 7 As shown, the first solenoid valve 708 is adjusted to be at channel 2, the active oil circuit of the oil pump 704 stops working, the second solenoid valve 709 and the third solenoid valve 710 are both at channel 2, at this time, the first hydraulic cylinder 9 and the second hydraulic cylinder 14 are both in a passive control state, the first hydraulic cylinder 9 and the second hydraulic cylinder 14 both follow the vibration of the waves to reciprocate, generate power generation hydraulic strokes, drive the wave energy generator 718 to rotate and generate electricity, and convert wave energy into electrical energy; this is the double cylinder working state. The double hydraulic cylinder double degree of freedom power generation effectively improves the power generation power of the system.

[0052] Those skilled in the art can understand that the above are only preferred examples of the invention and are not intended to limit the invention. Although the invention is described in detail with reference to the above examples, those skilled in the art can still modify the technical solutions recorded in the above examples or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, etc. made within the spirit and principle of the invention shall be included in the protection scope of the invention.

Claims

1. A floating wind energy-adjustable pitch pendulum wave energy combined power generation device, characterized in that: It includes wind power generation modules, adjustable-pitch wave power generation modules and floating platforms; The wind power generation module and the wave power generation module are both installed on the floating platform; The adjustable pitch wave energy power generation module includes a hydraulic system, a first hinge, a first hydraulic cylinder, a second hinge, a third hinge, a connecting arm, a float and a second hydraulic cylinder; one end of the second hydraulic cylinder is connected to the float, and the other end is connected to one end of the connecting arm; one end of the first hydraulic cylinder is hinged to the middle part of the connecting arm through the second hinge, and the other end of the first hydraulic cylinder is hinged to the tower of the wind power generation module through the first hinge; the other end of the connecting arm is also hinged to the tower of the wind power generation module through the third hinge.

2. The floating wind energy-adjustable pitch pendulum wave energy combined power generation device according to claim 1 is characterized in that: The wind power generation module includes a tower and a wind power generator arranged at the top of the tower; The floating platform is arranged at the bottom of the tower and connected to the seabed through an anchor chain; the floating platform includes a truss structure and a pontoon; there are three pontoons, which are spaced 120 degrees apart and distributed in a triangle, and the tower is located at the center of the triangle formed by the three pontoons, and the three pontoons and the tower are fixedly connected by the truss structure.

3. The floating wind energy-adjustable pitch pendulum wave energy combined power generation device according to claim 2 is characterized in that: There are three adjustable-pitch wave energy power generation modules, which are evenly distributed around the floating platform, with an angle of 120° between them, and are complementary to the angular positions of the three buoys of the floating platform.

4. The floating wind energy-adjustable pitch pendulum wave energy combined power generation device according to claim 1 is characterized in that: The hydraulic system comprises an oil tank, a first filter, a second filter, an oil pump, a relief valve, a first speed regulating valve, a first check valve, a first solenoid valve, a second solenoid valve, a third solenoid valve, a second speed regulating valve, a third speed regulating valve, a second check valve, a third check valve, a first pressure gauge, a second pressure gauge, a third pressure gauge, a wave energy generator and a battery; The first filter and the second filter are located in the oil tank, the oil outlet of the oil tank is connected to the inlet of the oil pump through the first filter, the outlet of the oil pump is divided to the overflow valve and then returns to the oil tank, and the outlet of the oil pump also reaches the P port of the first solenoid valve through the first check valve; the T port of the first solenoid valve is regulated by the first speed regulating valve, and then filtered by the second filter and returns to the oil tank; the A port of the first solenoid valve is divided into two oil paths, one is connected to the P port of the second solenoid valve through the second speed regulating valve and the second check valve, and the other is connected to the P port of the third solenoid valve through the third speed regulating valve and the third check valve; the T ports of the second solenoid valve and the third solenoid valve are connected to the B port of the first solenoid valve; The A port of the second solenoid valve is connected to the piston chamber at one end of the first hydraulic cylinder, and the B port of the second solenoid valve is connected to the piston chamber at the other end of the first hydraulic cylinder; the A port of the third solenoid valve is connected to the piston chamber at one end of the second hydraulic cylinder, and the B port of the third solenoid valve is connected to the piston chamber at the other end of the second hydraulic cylinder; the first oil circuit port of the wave energy generator is respectively connected to the piston chamber at one end of the first hydraulic cylinder and the second hydraulic cylinder, and the second oil circuit port of the wave energy generator is respectively connected to the piston chamber at the other end of the first hydraulic cylinder and the second hydraulic cylinder, and the wave energy generator is electrically connected to the battery; the first pressure gauge is installed in the oil tank, the second pressure gauge is installed in the piston chamber at one end of the first hydraulic cylinder, and the third pressure gauge is installed in the piston chamber at one end of the second hydraulic cylinder.

5. The floating wind energy-adjustable pitch pendulum wave energy combined power generation device according to claim 4 is characterized in that: The first hydraulic cylinder and the second hydraulic cylinder are both double-stroke hydraulic cylinders.

6. The floating wind energy-adjustable pitch pendulum wave energy combined power generation device according to claim 4 is characterized in that: The adjustable-pitch wave energy power generation module also includes a wave height meter for real-time detection of wave height.

7. A control method for a floating wind energy-adjustable pitch pendulum wave energy combined power generation device as claimed in claim 4, characterized in that: The method includes: Monitor the wave height h in real time. When the wave height exceeds the range of the adjustable distance capability, adjust the first solenoid valve, the second solenoid valve and the third solenoid valve to the position of channel 1. At this time, the oil in the oil tank is shunted by the pressure of the oil pump through the first one-way valve, and the oil path of channel 1 of the first solenoid valve is diverted through the second speed regulating valve and the third speed regulating valve to reach the piston chamber at one end of the first hydraulic cylinder and the second hydraulic cylinder. The first hydraulic cylinder and the second hydraulic cylinder are both under active control. The first hydraulic cylinder shortens the arm length, lifts the float away from the sea surface through the connecting arm, stops working, and locks the entire wave energy power generation device in the air to avoid possible damage to the equipment caused by extreme sea conditions. At this time, it is in the shutdown state; Monitor the wave height h in real time. When the wave height falls back to the range of the adjustable distance capability, adjust the position of the first solenoid valve to channel 1, the second solenoid valve to channel 2, and the third solenoid valve to channel 1. The oil in the oil tank is subject to the pressure of the oil pump through the first one-way valve, and the oil path along channel 1 of the first solenoid valve is diverted through the second speed regulating valve and the third speed regulating valve. The first hydraulic cylinder is in the passive motion stage and is in the power generation state; the second hydraulic cylinder is under active control, and the position of the second hydraulic cylinder is adjusted by active control to adjust the length of the vibration force arm of the float; this is a transitional state, and only the first hydraulic cylinder generates electricity; at this time, the float rises and falls under the action of seawater, driving the connecting arm to swing around the third hinge, and at the same time, the relative movement of the floating platform and the connecting arm causes the first hydraulic cylinder to reciprocate, driving the hydraulic system to operate and driving the wave energy generator to rotate and generate electricity, converting wave energy into electrical energy; After the float is in the transition stage for a preset time, the lock of the second hydraulic cylinder is released, the first solenoid valve is adjusted to be in channel 2, the active oil circuit of the oil pump stops working, the second solenoid valve and the third solenoid valve are both in channel 2, at this time, the first hydraulic cylinder and the second hydraulic cylinder are both in a passive control state, the first hydraulic cylinder and the second hydraulic cylinder both follow the vibration of the waves to reciprocate, generate power generation hydraulic strokes, drive the wave energy generator to rotate and generate electricity, and convert wave energy into electrical energy; this is the double-cylinder working state.

8. The control method of the floating wind energy-adjustable pitch pendulum wave energy combined power generation device according to claim 7 is characterized in that: In the transition state, for different wave height intervals, the extended length of the piston rod of the second hydraulic cylinder is adjusted by active control; and the extended length of the piston rod of the second hydraulic cylinder is locked by a one-way valve.

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