A semi-submersible floating wind turbine with integrated wave energy power generation device

Abstract

The present invention discloses a semi-submersible floating wind turbine integrated with a wave energy power generation device. The wind turbine of the semi-submersible floating wind turbine is installed at the top of the tower, a floating platform is installed at the lower part of the tower, a wave energy power generation device is installed in the floating platform, and the wave energy power generation device is electrically connected to the wind turbine. The present invention integrates the wave energy power generation device in the semi-submersible floating wind turbine, which can jointly utilize offshore wind energy and wave energy for power generation, dissipate wave and wind loads, effectively improve the motion response and structural load of the floating wind turbine, and improve the reliability and safety of the wind turbine.

Description

Technical Field

[0001] The invention relates to a semi-submersible floating wind turbine, in particular to a semi-submersible floating wind turbine integrated with a wave energy power generation device. Background Art

[0002] In the past decade, onshore wind power has developed extremely rapidly, and the installed capacity has increased rapidly. At present, onshore wind turbine installations have approached saturation, and wind power generation has gradually shifted to offshore wind turbines. Offshore wind energy resources are more abundant and of higher quality than onshore wind energy resources, especially in deep sea areas. It can be seen that the development of offshore wind energy is of great significance to the adjustment of energy structure and sustainable development. Existing offshore wind turbines are basically installed in shallow water areas near the coast, and use bottom-fixed foundation structures such as monopile and duct frame; for deep sea areas, fixed wind turbines are expensive, and floating wind turbines are a more economical and reliable choice.

[0003] The deep sea areas are rich in wind energy resources, but also face various extreme weather conditions such as typhoons, which cause floating wind turbines to produce more violent motion responses and structural loads. How to improve the operating performance and safety performance of floating wind turbines is a key technical problem in the development of floating wind power. Summary of the invention

[0004] In order to solve the problems existing in the background technology, the present invention provides a semi-submersible floating wind turbine with an integrated wave energy power generation device, which integrates the wave energy power generation device inside the semi-submersible floating wind turbine. It can jointly utilize multiple energy sources such as offshore wind energy and wave energy, and utilize the wave energy power generation device to dissipate wave and wind loads, effectively improve the motion response of the floating wind turbine and reduce the structural load of the semi-submersible floating wind turbine, thereby improving the reliability and safety of the wind turbine and effectively promoting its application in industry.

[0005] The technical solution adopted by the present invention is:

[0006] A semi-submersible floating wind turbine with integrated wave energy power generation device:

[0007] The semi-submersible floating wind turbine of the present invention comprises a wind turbine set, a tower, a floating platform, a plurality of mooring cables and a plurality of wave energy power generation devices. The wind turbine set is installed at the top of the tower, a floating platform is installed at the lower part of the tower, a plurality of wave energy power generation devices are installed in the floating platform, and each wave energy power generation device is electrically connected to the wind turbine set; the floating platform floats on the sea surface, and the floating platform is connected to the seabed through a plurality of mooring cables.

[0008] The floating platform comprises a truss structure and three pontoons, the three pontoons are fixedly connected to the lower part of the tower through the truss structure, and the three pontoons are evenly spaced along the circumference with the tower as the center, that is, the line connecting the center points of the three pontoons forms an equilateral triangle; each pontoon is connected to the seabed through a mooring cable; the inner bottom surface of each pontoon is circular, and a linear track is provided on the inner bottom surface of each pontoon in a radial direction, the linear track faces the center of the tower, and a wave energy power generation device is routably installed on the linear track, and the wave energy power generation device is electrically connected to a wind turbine.

[0009] The wind turbine generator set is also equipped with an anemometer, a first positioning device and a control circuit. The anemometer and the first positioning device are electrically connected to the control circuit; the first positioning device is located on the central axis of the tower.

[0010] The wave energy power generation device comprises a power generation device moving trolley, a second positioning device, a mass block, a plurality of springs and a hydraulic system; the second positioning device, the mass block, the springs and the hydraulic system are installed inside the power generation device moving trolley, and the power generation device moving trolley is rollingly installed on a linear track; the second positioning device, the hydraulic system and the power generation device moving trolley are all electrically connected to the control circuit on the wind turbine set, and the hydraulic system is electrically connected to the wind turbine set.

[0011] The second positioning device is installed at the center of the inner top surface of the mobile trolley of the power generation device; the hydraulic system is installed at the center of the inner bottom surface of the mobile trolley of the power generation device, the hydraulic system is connected to the bottom surface center of the mass block located above, and the bottom surface center of the mass block is connected to the inner bottom surface of the mobile trolley of the power generation device through various springs, and the elastic direction of each spring is perpendicular to the bottom surface of the mass block; the mobile trolley of the power generation device is also provided with limit guide rails on the two inner side surfaces on both sides of the linear track, and the two limit guide rails are perpendicular to the bottom surface of the mass block. The mass block is slidably installed between the two limit guide rails, and the mass block slides up and down along the length direction of the limit guide rails.

[0012] Under the action of waves, the mass block moves relative to the movement of the semi-submersible floating wind turbine, driving the output shaft of the hydraulic cylinder of the hydraulic system to reciprocate, driving the hydraulic system to operate and driving the generator of the hydraulic system to generate electricity. The generator of the hydraulic system outputs electrical energy to the wind turbine set. At the same time, the wind turbine set generates electricity under the action of offshore wind. The wind turbine set outputs the aggregated electrical energy from its own wind turbine power generation port, thereby realizing the wind and wave combined power generation of the power generation platform.

[0013] The mobile trolley of the power generation device comprises a trolley shell and four wheel mechanisms, the four wheel mechanisms are mounted on the outer bottom surface of the trolley shell, and the trolley shell is rolled and mounted on a linear track through the four wheel mechanisms; the second positioning device, mass block, various springs and hydraulic system are mounted inside the trolley shell; each wheel mechanism comprises a wheel, a motor and a braking system, the wheel is rolled and mounted on a linear track, a braking system is mounted on the wheel, the motor is mounted on the outer bottom surface of the trolley shell, and the output shaft of the motor is synchronously connected to the center of the wheel; the braking system and the motor are electrically connected to the control circuit. The control circuit controls the motor to drive the wheel to rotate and stop to drive the mobile trolley of the power generation device to move and stop, and at the same time, the control circuit controls the braking system to stop the mobile trolley of the power generation device from moving.

[0014] The hydraulic system includes a hydraulic cylinder, a hydraulic motor, a generator and an adjustable throttle valve, etc. The output shaft of the hydraulic cylinder is vertically connected to the bottom center of the mass block located above, the hydraulic cylinder is connected to the hydraulic motor through a hydraulic pipeline, and the adjustable throttle valve for adjusting the flow of the hydraulic system is installed on the hydraulic pipeline. The rotating shaft of the hydraulic motor is connected to the generator, and the generator is electrically connected to the control circuit and the wind turbine set.

[0015] The generator can be used to power the control circuit; the adjustable throttle valve is used to control the flow of the hydraulic system, adjust the damping of the reciprocating motion of the hydraulic cylinder, and act on the mass block together with the stiffness effect of the spring, so that the resonance frequency of the mass block is consistent with the natural frequency of the pitch motion of the semi-submersible floating wind turbine, thereby improving the motion response of the semi-submersible floating wind turbine and achieving the effect of a tuned mass damper.

[0016] The beneficial effects of the present invention are:

[0017] 1) The semi-submersible floating foundation based on the truss buoy structure has a simple structure, easy installation, and is applicable to a wide range of water depths, thereby improving the utilization rate of deep-sea energy.

[0018] 2) Combining semi-submersible floating wind turbines with wave power generation devices, sharing infrastructure such as support platforms and power transmission supporting systems, achieving the comprehensive utilization of offshore wind energy and wave energy, and effectively improving the overall power generation efficiency.

[0019] 3) Wave energy power generation devices can improve the motion response and structural load of floating wind turbines and enhance the structural performance of wind turbines.

[0020] 4) The control method of the wave energy power generation device can effectively balance the wind load and improve the stability and safety of the wind turbine under extreme sea conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the semi-submersible floating wind turbine of the present invention;

[0022] Figure 2It is a schematic diagram of the arrangement of the wave energy power generation device and the linear guide rail of the present invention;

[0023] Figure 3 It is a schematic structural diagram of the wave energy power generation device of the present invention;

[0024] In the figure: 1. wind turbine, 2. tower, 3. truss structure, 4. buoy, 5. mooring cable, 6. wave energy power generation device, 7. linear track, 8. mass block, 9. limit guide rail, 10. spring, 11. hydraulic system. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figure 1 As shown, the semi-submersible floating wind turbine of the present invention comprises a wind turbine set 1, a tower 2, a floating platform, a plurality of mooring cables 5 and a plurality of wave energy power generation devices 6, wherein the wind turbine set 1 is installed at the top of the tower 2, a floating platform is installed at the lower part of the tower 2, a plurality of wave energy power generation devices 6 are installed in the floating platform, and each wave energy power generation device 6 is electrically connected to the wind turbine set 1; the floating platform floats on the sea surface, and the floating platform is connected to the seabed through a plurality of mooring cables 5.

[0027] The floating platform includes a truss structure 3 and three pontoons 4. The three pontoons 4 are fixedly connected to the lower part of the tower 2 through the truss structure 3. The three pontoons 4 are evenly spaced along the circumferential direction with the tower 2 as the center, that is, the connecting line of the center points of the three pontoons 4 forms an equilateral triangle; each pontoon 4 is connected to the seabed through a mooring cable 5; the inner bottom surface of each pontoon 4 is circular, and a linear track 7 is provided on the inner bottom surface of each pontoon 4 in the radial direction, the linear track 7 faces the center of the tower 2, and a wave energy power generation device 6 is rollingly installed on the linear track 7, and the wave energy power generation device 6 is electrically connected to the wind turbine 1. The wind turbine 1 is also equipped with an anemometer, a first positioning device and a control circuit, and the anemometer and the first positioning device are electrically connected to the control circuit; the first positioning device is located on the central axis of the tower 2.

[0028] like Figure 3As shown, the wave energy power generation device 6 includes a power generation device moving trolley, a second positioning device, a mass block 8, a plurality of springs 10 and a hydraulic system 11; the second positioning device, the mass block 8, the springs 10 and the hydraulic system 11 are installed inside the power generation device moving trolley, and the power generation device moving trolley is rollingly installed on the linear track 7; the second positioning device, the hydraulic system 11 and the power generation device moving trolley are all electrically connected to the control circuit on the wind turbine 1, and the hydraulic system 11 is electrically connected to the wind turbine 1. The hydraulic system 11 includes a hydraulic cylinder, a hydraulic motor, a generator and an adjustable throttle valve, etc. The output shaft of the hydraulic cylinder is vertically connected to the bottom center of the mass block 8 located above, the hydraulic cylinder is connected to the hydraulic motor through a hydraulic pipeline, and the adjustable throttle valve for adjusting the flow of the hydraulic system 11 is installed on the hydraulic pipeline, the rotating shaft of the hydraulic motor is connected to the generator, and the generator is electrically connected to the control circuit and the wind turbine 1.

[0029] The generator can be used to power the control circuit; the adjustable throttle valve is used to control the flow of the hydraulic system, adjust the damping of the reciprocating motion of the hydraulic cylinder, and act together with the stiffness effect of the spring 10 on the mass block 8, so that the resonant frequency of the mass block 8 is consistent with the natural frequency of the pitch motion of the semi-submersible floating wind turbine, thereby improving the motion response of the semi-submersible floating wind turbine and achieving the effect of a tuned mass damper.

[0030] The second positioning device is installed at the center of the inner top surface of the mobile trolley of the power generation device; the hydraulic system 11 is installed at the center of the inner bottom surface of the mobile trolley of the power generation device, and the hydraulic system 11 is connected to the bottom center of the mass block 8 located above, and the bottom center of the mass block 8 is connected to the inner bottom surface of the mobile trolley of the power generation device through various springs 10, and the elastic direction of each spring 10 is perpendicular to the bottom surface of the mass block 8; the mobile trolley of the power generation device is also provided with limit guide rails 9 on the two inner side surfaces on both sides of the linear track 7, and the two limit guide rails 9 are perpendicular to the bottom surface of the mass block 8. The mass block 8 is slidably installed between the two limit guide rails 9, and the mass block 8 slides up and down along the length direction of the limit guide rails 9.

[0031] Under the action of waves, the mass block 8 moves relative to the movement of the semi-submersible floating wind turbine, driving the output shaft of the hydraulic cylinder of the hydraulic system 11 to reciprocate, driving the hydraulic system to operate and driving the generator of the hydraulic system 11 to generate electricity. The generator of the hydraulic system 11 outputs electrical energy to the wind turbine set 1. At the same time, the wind turbine set generates electricity under the action of offshore wind power, and the wind turbine set outputs the aggregated electrical energy from its own wind turbine power generation port, thereby realizing wind and wave combined power generation of the power generation platform.

[0032] The mobile trolley of the power generation device includes a trolley shell and four wheel mechanisms, the four wheel mechanisms are installed on the outer bottom surface of the trolley shell, and the trolley shell is rolled and installed on the linear track 7 through the four wheel mechanisms; the second positioning device, the mass block 8, each spring 10 and the hydraulic system 11 are installed inside the trolley shell; each wheel mechanism includes a wheel, a motor and a braking system, the wheel is rolled and installed on the linear track 7, the wheel is equipped with a braking system, the motor is installed on the outer bottom surface of the trolley shell, and the output shaft of the motor is synchronously connected to the center of the wheel; the braking system and the motor are electrically connected to the control circuit. The control circuit controls the motor to drive the wheel to rotate and stop to drive the mobile trolley of the power generation device to move and stop, and at the same time, the control circuit controls the braking system to stop the mobile trolley of the power generation device from moving.

[0033] like Figure 2 As shown, L 1. L 2 and L 3 respectively represent the optimal distances from the positions of the three second positioning devices to the central axis of the tower 2, L 1. L 2 and L 3 are all within the preset distance range; θ 1. θ 2 and θ 3 respectively represent the three angles formed between the straight line direction from the positions of the three second positioning devices to the central axis of the tower 2 and the average wind direction.

[0034] Therefore, the present invention can realize the comprehensive utilization of offshore wind energy and wave energy, improve the efficiency of offshore energy utilization, and the two share infrastructure such as supporting platforms and power transmission supporting systems, effectively improving the overall power generation efficiency; at the same time, the wave energy power generation device adopted by the present invention can effectively balance the overturning moment caused by wind loads, and improve the safety and reliability of the wind turbine; the mass-spring-damper system in the wave energy power generation device can achieve the effect of a tuned mass damper, effectively improve the platform motion response, reduce structural loads, optimize power output, and improve the operating performance of the floating wind turbine. The semi-submersible floating wind turbine integrated with the wave energy power generation device of the present invention is a reliable offshore renewable energy power generation platform.

Claims

1. A semi-submersible floating wind turbine integrated with a wave energy power generation device, characterized in that: The invention comprises a wind turbine generator set (1), a tower (2), a floating platform, a plurality of mooring cables (5) and a plurality of wave energy power generation devices (6), wherein the wind turbine generator set (1) is installed at the top of the tower (2), the floating platform is installed at the bottom of the tower (2), the plurality of wave energy power generation devices (6) are installed in the floating platform, and each wave energy power generation device (6) is electrically connected to the wind turbine generator set (1); the floating platform floats on the sea surface, and the floating platform is connected to the seabed via the plurality of mooring cables (5); The floating platform comprises a truss structure (3) and three buoys (4), the three buoys (4) being fixedly connected to the lower part of the tower (2) via the truss structure (3), and the three buoys (4) being evenly spaced and arranged in a circumferential direction with the tower (2) as the center; each buoy (4) is connected to the seabed via a mooring cable (5); the inner bottom surface of each buoy (4) is circular, and a linear track (7) is provided on the inner bottom surface of each buoy (4) in a radial direction, the linear track (7) facing the center of the tower (2), and a wave energy power generation device (6) is rotatably mounted on the linear track (7), and the wave energy power generation device (6) is electrically connected to the wind turbine (1); The wind turbine set (1) is also equipped with an anemometer, a first positioning device and a control circuit, and the anemometer and the first positioning device are electrically connected to the control circuit; the first positioning device is located on the central axis of the tower (2); The wave energy power generation device (6) comprises a power generation device moving trolley, a second positioning device, a mass block (8), a plurality of springs (10) and a hydraulic system (11); the second positioning device, the mass block (8), the springs (10) and the hydraulic system (11) are installed inside the power generation device moving trolley, and the power generation device moving trolley is rollingly installed on a linear track (7); the second positioning device, the hydraulic system (11) and the power generation device moving trolley are all electrically connected to a control circuit on a wind turbine (1), and the hydraulic system (11) is electrically connected to the wind turbine (1); The second positioning device is installed at the center of the inner top surface of the generator moving trolley; the hydraulic system (11) is installed at the center of the inner bottom surface of the generator moving trolley, the hydraulic system (11) is connected to the center of the bottom surface of the mass block (8) located above, and the center of the bottom surface of the mass block (8) is connected to the inner bottom surface of the generator moving trolley through various springs (10), and the elastic direction of each spring (10) is perpendicular to the bottom surface of the mass block (8); the generator moving trolley is also provided with limit guide rails (9) on two inner side surfaces located on both sides of the linear track (7), and the two limit guide rails (9) are perpendicular to the bottom surface of the mass block (8), and the mass block (8) is slidably installed between the two limit guide rails (9).

2. A semi-submersible floating wind turbine integrated with a wave energy power generation device according to claim 1, characterized in that: The power generation device mobile trolley comprises a trolley housing and four wheel mechanisms, the four wheel mechanisms are mounted on the outer bottom surface of the trolley housing, and the trolley housing is rollingly mounted on a linear track (7) through the four wheel mechanisms; a second positioning device, a mass block (8), various springs (10) and a hydraulic system (11) are mounted inside the trolley housing; each wheel mechanism comprises a wheel, a motor and a braking system, the wheel is rollingly mounted on the linear track (7), a braking system is mounted on the wheel, the motor is mounted on the outer bottom surface of the trolley housing, and the output shaft of the motor is synchronously connected to the center of the wheel; the braking system and the motor are electrically connected to a control circuit.

3. A semi-submersible floating wind turbine integrated with a wave energy power generation device according to claim 1, characterized in that: The hydraulic system (11) comprises a hydraulic cylinder, a hydraulic motor, a generator and an adjustable throttle valve. The output shaft of the hydraulic cylinder is vertically connected to the bottom center of the mass block (8) located above. The hydraulic cylinder is connected to the hydraulic motor via a hydraulic pipeline. The adjustable throttle valve for adjusting the flow of the hydraulic system (11) is installed on the hydraulic pipeline. The rotating shaft of the hydraulic motor is connected to the generator. The generator is electrically connected to the control circuit and the wind turbine (1).

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