Stabilizer for floating wind turbine, floating wind turbine and method of use

Abstract

The application discloses a stabilizing device for a floating wind turbine, a floating wind turbine and an application method, the stabilizing device for the floating wind turbine comprises a stabilizing plate, a lifting mechanism and a rotating mechanism, the stabilizing plate is installed on the lifting mechanism, and the lifting mechanism is installed on the rotating mechanism; the floating wind turbine comprises a floating platform, height-adjustable supporting arms are arranged on the floating platform, a blade set is arranged on a cabin at the top of the supporting arms, a generator connected with the blade set is arranged in the cabin, the blade set comprises a pair of blades arranged on the front side of the cabin and a pair of blades arranged on the rear side of the cabin, the pair of blades arranged on the front side of the cabin and the pair of blades arranged on the rear side of the cabin are connected to different generators respectively, and the stabilizing device for the floating wind turbine is arranged at the bottom of the floating platform. The application can improve the safety of a large-capacity floating wind turbine under extreme conditions such as strong winds and typhoons.

Description

Technical Field

[0001] This invention relates to the field of safety technology for wind turbine generators, specifically to an anti-sway device for floating wind turbine generators, a floating wind turbine generator, and its application method. Background Technology

[0002] The development of onshore wind power is nearing saturation, while offshore wind power, with its richer wind energy reserves and more stable wind resources, is attracting more researchers and engineers. However, nearshore areas have limited wind resources and are constrained by other important industries such as fishing and shipping, making it difficult to achieve large-capacity, large-scale wind farm construction. Therefore, large-capacity floating offshore wind turbines for deep-sea applications are an inevitable choice for offshore wind power development. However, compared to onshore and nearshore areas, deep-sea areas experience stronger winds and are prone to extreme weather events such as typhoons, which places higher demands on the safety of wind turbines. The extreme environment of deep-sea areas, with its high wind speeds and large turbulent structures, has a significant wind-wave-current coupling effect on large offshore wind turbines, resulting in large multi-degree-of-freedom dynamic responses. Under extreme conditions such as strong winds and typhoons, the turbines generate complex multi-degree-of-freedom dynamic responses under wind-wave-current coupling, which can easily lead to dynamic instability and component damage, resulting in serious damage to the wind power system or even system-wide failure. Most offshore floating wind turbines currently employ vertical towers, resulting in a high and non-adjustable center of gravity. Under extreme conditions such as strong typhoons, this leads to immense wind loads, placing extremely high stress on the tower and often causing irreversible damage to various structural components. Furthermore, the floating platform of offshore wind turbines experiences pitching, rolling, rotation, and heaving responses under wind-wave-current coupling. These responses are further amplified under extreme conditions like strong typhoons, significantly impacting the safe operation of the turbine. Therefore, how to lower the turbine's center of gravity and improve platform stability to enhance turbine safety under extreme conditions like strong typhoons is a critical challenge that urgently needs to be addressed in the field of large-capacity offshore floating wind power generation. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a sway reduction device for floating wind turbines, a floating wind turbine, and an application method, in view of the above-mentioned problems of the prior art. The present invention, through the structure of a sway reduction plate, a lifting mechanism, and a rotating mechanism, can improve the safety of large-capacity floating wind turbines under extreme conditions such as strong winds and typhoons, and is especially suitable for deep-sea typhoon-resistant floating wind turbines.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0005] The present invention provides a sway reduction device for a floating wind turbine, comprising a sway reduction plate, a lifting mechanism and a rotating mechanism, wherein the sway reduction plate is mounted on the lifting mechanism and the lifting mechanism is mounted on the rotating mechanism.

[0006] Optionally, two lifting mechanisms are installed at the bottom of the rotating mechanism, and the ends of the lifting mechanisms are respectively movably connected to the anti-sway plate to adjust the pitch angle of the anti-sway plate by the different lifting strokes of the two lifting mechanisms.

[0007] Optionally, the cross-section of the anti-slip plate is an airfoil structure.

[0008] This invention provides a floating wind turbine, including a floating platform with a height-adjustable boom. A blade assembly is installed on the nacelle at the top of the boom. A generator connected to the blade assembly is located inside the nacelle. The blade assembly includes a pair of blades located on the front side of the nacelle and a pair of blades located on the rear side of the nacelle. The pair of blades on the front side of the nacelle and the pair of blades on the rear side of the nacelle are respectively connected to different generators. A sway reduction device for the floating wind turbine is provided at the bottom of the floating platform.

[0009] Optionally, the support arm includes a unit support arm and a counterweight support arm, which are connected to each other and hinged on the floating platform through a connecting part. The unit support arm and the counterweight support arm have different lengths and are arranged in a crisscross pattern. The floating platform is provided with a drive mechanism for driving the support arm to rotate relative to the floating platform to adjust the height of the cabin's center of gravity.

[0010] This invention provides a method for applying the aforementioned floating wind turbine, comprising:

[0011] S101, detect the acceleration signals in the lateral, longitudinal and vertical directions respectively, with the lateral and longitudinal directions forming a horizontal plane and the vertical direction being the vertical direction. If the acceleration signals in the lateral, longitudinal and vertical directions do not exceed the preset threshold, then jump to step S102; otherwise, jump to step S103.

[0012] S102, the lifting mechanism stops working or remains in the stopped working state; the direction of motion of the floating wind turbine is obtained by calculating the vector sum of the lateral and longitudinal acceleration signals, and the anti-sway plate is rotated by the rotating mechanism so that the leading edge of the anti-sway plate faces the opposite direction of motion of the floating wind turbine to achieve passive anti-sway, and then the process jumps to step S101.

[0013] S103, calculate the vector sum of the lateral and longitudinal acceleration signals to obtain the motion direction of the floating wind turbine, and rotate the anti-sway plate through the rotating mechanism so that the leading edge of the anti-sway plate faces the opposite direction of the motion direction of the floating wind turbine; and control the lifting mechanism to enter the working state to raise and lower the anti-sway plate so that the anti-sway plate swings up and down to achieve active anti-sway, and jump to step S101.

[0014] Optionally, when controlling the lifting mechanism to enter the working state to raise and lower the damper plate in step S103, the method further includes adjusting the amplitude of raising and lowering the damper plate according to the amplitude of the lateral, longitudinal and vertical acceleration signals.

[0015] Optionally, steps S102 and S103 include a step of waiting until the end of the current cycle before jumping to step S101, and the adjustment of the amplitude of the sway decelerator based on the amplitude of the lateral, longitudinal and vertical acceleration signals includes: determining whether any of the lateral, longitudinal and vertical acceleration signals exceeded a preset threshold in the previous cycle; if so, increasing the amplitude of the rise and fall by a preset adjustment amount; otherwise, decreasing the amplitude of the rise and fall by a preset adjustment amount.

[0016] Optionally, it also includes detecting the current wind speed, and when the wind speed exceeds a set upper limit, lowering the boom to its lowest position and locking both the pair of blades located at the front of the nacelle and the pair of blades located at the rear of the nacelle in a direction parallel to the boom using the generator brake.

[0017] Optionally, it also includes dynamically adjusting the height of the boom according to the wind speed when the wind speed does not exceed the set upper limit but exceeds the rated wind speed, so as to achieve wind curtailment, and the height of the boom is negatively correlated with the wind speed; it also includes raising the boom to the highest level when the wind speed does not exceed the rated wind speed to improve power generation efficiency.

[0018] Compared with the prior art, the present invention has the following main advantages:

[0019] 1. The anti-sway device for floating wind turbines of the present invention includes an anti-sway plate, which can provide a passive anti-sway function.

[0020] 2. The anti-sway plate of the present invention is installed on the lifting mechanism, and the working status of the lifting mechanism can be controlled to determine whether to further switch to active anti-sway function on the basis of providing passive anti-sway function.

[0021] 3. The present invention includes a rotating mechanism, and a lifting mechanism is installed on the rotating mechanism. The angle of the anti-roll plate can be adjusted by the rotating mechanism to realize the movement of the waves in different directions to achieve anti-roll and enhance the anti-roll effect.

[0022] In summary, the anti-sway device for floating wind turbines of the present invention, through the structure of anti-sway plate, lifting mechanism and rotating mechanism, can improve the safety of large-capacity floating wind turbines under extreme conditions such as strong winds and typhoons, and is especially suitable for deep-sea typhoon-resistant floating wind turbines. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a floating wind turbine in an embodiment of the present invention.

[0024] Figure 2 for Figure 1 A magnified schematic diagram of a portion of AA.

[0025] Figure 3 This is a schematic diagram of the state when the wind speed of the floating wind turbine exceeds the set upper limit value in an embodiment of the present invention.

[0026] Figure 4 This is a flowchart illustrating the application method in an embodiment of the present invention.

[0027] Legend: 1. Anti-sway plate; 2. Lifting mechanism; 3. Rotating mechanism; 4. Floating platform; 5. Support arm; 51. Unit support arm; 52. Counterweight support arm; 6. Blade; 7. Drive mechanism. Detailed Implementation

[0028] like Figure 2 As shown, this embodiment provides a sway reduction device for a floating wind turbine, including a sway reduction plate 1, a lifting mechanism 2, and a rotating mechanism 3. The sway reduction plate 1 is mounted on the lifting mechanism 2, and the lifting mechanism 2 is mounted on the rotating mechanism 3. The lifting mechanism 2 controls the sway reduction plate 1 to move up and down, causing it to swing up and down to achieve active sway reduction. The rotating mechanism 3 controls the rotation direction of the sway reduction plate 1 to reach the desired optimal angle to enhance its sway reduction effect. The sway reduction plate 1 can provide passive sway reduction, and the working state of the lifting mechanism 2 can be used to control whether to switch to active sway reduction.

[0029] As an optional implementation, the bottom of the rotating mechanism 3 in this embodiment is equipped with two lifting mechanisms 2, and the ends of the lifting mechanisms 2 are respectively movably connected to the anti-sway plate 1 to adjust the pitch angle of the anti-sway plate 1 by different lifting strokes of the two lifting mechanisms 2. In this way, the force of the waves on the anti-sway plate 1 can be decomposed into vertical and horizontal components. The horizontal component can be canceled out by the anti-sway devices of multiple floating wind turbines, while the vertical component can be canceled out by the lifting motion of the lifting mechanisms 2. For example, the anti-sway plates 1 of a pair of anti-sway devices of a floating wind turbine can be adjusted to be arranged at relative inclinations (each anti-sway plate 1 is tilted towards the other anti-sway plate 1), thereby decomposing the force of the waves on the anti-sway plate 1 into vertical and horizontal components. The horizontal components of the anti-sway plates 1 of a pair of anti-sway devices are opposite and can cancel each other out.

[0030] In this embodiment, the cross-section of the anti-sway plate 1 is an airfoil structure. The airfoil structure is an existing streamlined structure. One end (the end of the smooth curve) is called the leading edge, and the other end (the intersection of the smooth curves) is called the trailing edge. It is a common shape in aerodynamics such as airplanes and wind turbines. In this embodiment, it is applied to anti-sway. Compared with ordinary plate structures, the airfoil surface can decompose the force of the waves into vertical and horizontal components, resulting in a better anti-sway effect.

[0031] It should be noted that the lifting mechanism 2 and the rotating mechanism 3 are existing conventional mechanical structures. For example, in this embodiment, the lifting mechanism 2 uses a linear motor, which enables rapid lifting and lowering to enhance the anti-sway effect of the anti-sway plate 1. In this embodiment, the linear motor is sealed, with its sealed housing mounted on the rotating mechanism 3 and the telescopic shaft extending out of the sealed housing for mounting the anti-sway plate 1. The rotating mechanism 3 includes a rotary motor and a worm gear assembly. The rotary motor drives the worm of the worm gear assembly to rotate, and the lifting mechanism 2 is mounted on the turbine shaft extending from the turbine of the worm gear assembly, thus enabling it to withstand large waves and typhoons and other extreme weather conditions. Considering the harsh environment in the ocean, the rotary motor should be a waterproof motor, and the worm gear assembly should also be sealed, with only the turbine shaft on the turbine extending out of the sealed structure for mounting the lifting mechanism 2.

[0032] like Figure 1As shown, this embodiment provides a floating wind turbine, including a floating platform 4. The floating platform 4 has a height-adjustable boom 5. A blade assembly is installed on the nacelle at the top of the boom 5. A generator connected to the blade assembly is located inside the nacelle. The rotor assembly includes a pair of blades 6 located at the front of the nacelle and a pair of blades 6 located at the rear of the nacelle. The pair of blades 6 at the front and the pair at the rear of the nacelle are respectively connected to different generators. The generators are equipped with brakes. The bottom of the floating platform is equipped with the aforementioned anti-sway device for the floating wind turbine, thereby enabling anti-sway operation of the floating platform 4. By adjusting the height of the boom 5, on the one hand, the boom 5 can be lowered to protect the equipment when the wind force is high; on the other hand, the height can be adjusted as needed to regulate wind force. Before the boom 5 is lowered, the front and rear generators can be controlled to adjust the angles of the two pairs of blades 6 to the same position (they are arranged in an X shape during operation), adjust the blades of the two impellers 6 to a parallel position with the boom 5, and control the front and rear generator brakes to lock the blades 6, thereby protecting the blades 6 from wave erosion after the boom 5 is lowered.

[0033] As an optional implementation, in this embodiment, the bottom of the floating platform is equipped with two of the aforementioned anti-sway devices for floating wind turbines. The floating platform 4 has a triangular structure, with mooring cables installed at one corner and one of the aforementioned anti-sway devices for floating wind turbines installed at each of the other two corners. This allows the anti-sway plates 1 of the pair of anti-sway devices for the floating wind turbines to be adjusted to be arranged at relative inclinations (each anti-sway plate 1 is tilted towards the other anti-sway plate 1), decomposing the force of the waves on the anti-sway plates 1 into vertical and horizontal components. This ensures that the horizontal components of the anti-sway plates 1 of the pair of anti-sway devices are opposite and can cancel each other out, thereby improving the anti-sway operation effect.

[0034] The height-adjustable boom 5 can be equipped with the required height adjustment structure to achieve adjustment of the cabin's center of gravity height. For example... Figure 1 As shown, in an optional implementation, the support arm 5 in this embodiment includes a unit support arm 51 and a counterweight support arm 52. The unit support arm 51 and the counterweight support arm 52 are connected to each other and are hinged on the floating platform 4 through the connecting parts. The unit support arm 51 and the counterweight support arm 52 have different lengths and are arranged in a cross manner. The floating platform 4 is provided with a drive mechanism 7 for driving the support arm 5 to rotate relative to the floating platform 4 to adjust the height of the cabin center of gravity.

[0035] In this embodiment, the drive mechanism 7 is a winch mechanism; alternatively, an electric cylinder or other drive device can be used as needed. By driving the winch mechanism to loosen the hinge, the height of the unit's boom 51 is lowered, thereby reducing the height of the nacelle and impeller 6, thus lowering the unit's center of gravity and resisting wind loads under extreme conditions such as strong typhoons. Specifically, in the shedding condition when the unit faces extreme operating conditions such as strong typhoons, by controlling the winch mechanism to loosen the hinge, the boom 5 rotates around the hinge point, and the unit's boom 51 gradually lowers (the lowering range of the unit's boom 51 is between 15 degrees and 75 degrees with the horizontal plane, ensuring that the torque on the nacelle side does not exceed the bearing capacity of the unit's boom 51), while the counterweight boom 52 gradually rises, and the height of the nacelle and blades 6 gradually decreases. The counterweight block connected to the counterweight boom 52 is raised to ensure that the torque on the upper end of the unit's boom 51, the nacelle and blades 6, and the lower end of the counterweight boom 52 are similar, maintaining a balance of forces on both sides and further reducing the stress on the boom. By controlling the motor, the front and rear generators are adjusted to the same angle, and then the front and rear generators are controlled to stop by brake, so that the front and rear sets of blades 6 are locked in a state parallel to the unit support arm 51, ensuring that the blades are not affected by the erosion of the sea waves.

[0036] See Figure 3 This embodiment provides an application method for the aforementioned floating wind turbine, including:

[0037] S101, detect the acceleration signals in the lateral, longitudinal, and vertical directions (referred to as pitch, roll, and heave signals respectively), with the lateral and longitudinal directions forming a horizontal plane and the vertical direction being the vertical direction. If the acceleration signals in the lateral, longitudinal, and vertical directions do not exceed the preset threshold, then proceed to step S102; otherwise, proceed to step S103.

[0038] S102, the lifting mechanism 2 stops working or remains in the stopped working state; the direction of motion of the floating wind turbine is obtained by calculating the vector sum of the lateral and longitudinal acceleration signals, and the anti-sway plate 1 is rotated by the rotating mechanism 3 so that the front edge (arc surface) of the anti-sway plate 1 faces the opposite direction of motion of the floating wind turbine (so that the water flow generates a force opposite to the direction of motion on the anti-sway plate 1) to achieve passive anti-sway, and then jump to step S101.

[0039] S103, if any one of the lateral, longitudinal, and vertical acceleration signals exceeds a preset threshold, passive sway reduction cannot meet the sway reduction requirements. Therefore, it is necessary to control the lifting mechanism 2 to enter the working state to achieve active sway reduction and improve the sway reduction effect. Specifically, this includes: calculating the vector sum of the lateral and longitudinal acceleration signals to obtain the motion direction of the floating wind turbine, and rotating the sway reduction plate 1 through the rotating mechanism 3 so that the leading edge of the sway reduction plate 1 faces the opposite direction of the motion direction of the floating wind turbine (so that the water flow generates a force opposite to the motion direction on the sway reduction plate 1); and controlling the lifting mechanism 2 to enter the working state to lift and lower the sway reduction plate 1 so that the sway reduction plate 1 swings up and down to achieve active sway reduction, and then skipping to step S101.

[0040] The rotating mechanism 3 continuously rotates the anti-sway plate 1 so that its leading edge (arc-shaped surface) faces the opposite direction of the floating wind turbine's movement, i.e., opposite to the direction of water flow. This causes the water flow to act on the anti-sway plate 1, generating a force opposite to the direction of movement, thereby forming an anti-sway torque and reducing the pitch and heave amplitude. When the pitch, heave, and roll of the turbine exceed the threshold, the lifting mechanism 2 of the anti-sway device is activated, and the anti-sway plate 1 unfolds. Facing the waves, the anti-sway plate 1 adopts an up-and-down swinging mode. The surrounding water flow generates lift on the plate, and this lift generates a torque through the lever arm relative to the center of gravity, which stabilizes the floating platform and reduces the roll, further improving the anti-sway effect.

[0041] As an optional implementation, in order to achieve the sensing and matching of lateral, longitudinal, and vertical acceleration signals, in step S103 of this embodiment, when controlling the lifting mechanism 2 to enter the working state and raising and lowering the damper 1, the adjustment of the raising and lowering amplitude of the damper 1 according to the amplitude of the lateral, longitudinal, and vertical acceleration signals is also included. Specifically, the required implementation method can be adopted as needed, for example: using a preset mapping table to look up and map the amplitude of the lateral, longitudinal, and vertical acceleration signals to the raising and lowering amplitude; or using a function model to calculate the amplitude of the lateral, longitudinal, and vertical acceleration signals to the raising and lowering amplitude; or using a machine learning model to calculate the amplitude of the lateral, longitudinal, and vertical acceleration signals to the raising and lowering amplitude, etc. Furthermore, the frequency of raising and lowering the damper 1 can be further adjusted according to the amplitude of the lateral, longitudinal, and vertical acceleration signals; the principle is the same as adjusting the raising and lowering amplitude, and will not be elaborated here.

[0042] In this embodiment, steps S102 and S103 both include a step of waiting until the end of the current cycle before jumping to step S101 (i.e., steps S102 and S103 are executed in cycles). The amplitude adjustment of the sway damper 1 according to the amplitude of the lateral, longitudinal, and vertical acceleration signals includes: determining whether any of the lateral, longitudinal, and vertical acceleration signals exceeded a preset threshold in the previous cycle. If so, the amplitude of the rise and fall is increased by a preset adjustment amount; otherwise, the amplitude of the rise and fall is decreased by a preset adjustment amount. Thus, when the wind speed and wave speed decrease, the lifting mechanism 2 controls the sway damper 1 to swing smaller, thereby reducing the self-generated power loss of the unit.

[0043] This embodiment also includes detecting the current wind speed. When the wind speed exceeds a set upper limit, the boom 5 is lowered to its lowest position, and both the pair of blades 6 located at the front of the nacelle and the pair of blades 6 located at the rear of the nacelle are locked in a direction parallel to the boom 5 via the generator brake to achieve shutdown. Figure 4 As shown. When the wind speed exceeds the set upper limit, it means that the wind speed has exceeded the safe operating wind speed range of the unit, which may cause damage to the wind turbine. Therefore, the boom 5 is lowered to the minimum to reduce the stress on the unit caused by strong wind load, thereby reducing the pitch of the unit and ensuring that the tilt angle of the unit is within the safe range. At the same time, the blades 6 are all locked in the direction parallel to the boom 5 by the generator brake to protect the blades 6 from wave erosion after the boom 5 is lowered.

[0044] If the wind speed does not exceed the set upper limit, it means that the wind speed is still within the rated wind speed range of the unit, and the unit is operating normally. (See also...) Figure 3 This embodiment also includes dynamically adjusting the height of the boom 5 according to the wind speed when the wind speed does not exceed the set upper limit but exceeds the rated wind speed to achieve wind curtailment, and the height of the boom 5 is negatively correlated with the wind speed; it also includes raising the boom 5 to its highest position to improve power generation efficiency when the wind speed does not exceed the rated wind speed. Similarly, the negative correlation between the height of the boom 5 and the wind speed can also be achieved by looking up tables, using function models, or machine learning models as needed to map the height of the boom 5 to the wind speed.

[0045] Faced with strong winds and waves under extreme conditions such as typhoons, floating wind turbines exhibit pitching and rolling motion characteristics. If left uncontrolled, these can severely impact the stable and safe operation of the turbine, potentially leading to irreversible consequences such as rollover or overturning. To address these issues, this embodiment combines two methods: active and passive pitch reduction control with a pitch damping device, and adjustable center of gravity control for the boom 5. This combination enhances the safety of large-capacity floating wind turbines. Specifically, the active and passive pitch reduction control involves installing a plate-type pitch damping device at the bottom of the floating platform. When the pitch, roll, and heave of the turbine do not exceed threshold values, the lifting mechanism 2 of the pitch damping device remains inactive, while the rotating mechanism 3 engages, providing passive pitch reduction. When the pitch, roll, and heave exceed the threshold values, the lifting mechanism 2 engages, further improving the pitch reduction effect and achieving active pitch reduction. By controlling the lifting of the boom 5, the height of the nacelle and the rotor 6 is lowered, thereby lowering the center of gravity of the unit to resist the load of strong typhoons. At the same time, the blades 6 are locked in parallel in the direction of the boom 5 to protect the blades from wave erosion.

[0046] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A floating wind turbine generator, characterized in that, The system includes a floating platform (4), the bottom of which is equipped with a sway-damping device for a floating wind turbine. The sway-damping device for a floating wind turbine includes a sway-damping plate (1), a lifting mechanism (2), and a rotating mechanism (3). The sway-damping plate (1) is mounted on the lifting mechanism (2), and the lifting mechanism (2) is mounted on the rotating mechanism (3). Two lifting mechanisms (2) are installed at the bottom of the rotating mechanism (3), and the ends of the lifting mechanisms (2) are movably connected to the sway-damping plate (1) to adjust the pitch angle of the sway-damping plate (1) by the different lifting strokes of the two lifting mechanisms (2). The floating platform (4) is equipped with a height-adjustable support arm (5), and a blade assembly is installed on the nacelle at the top of the support arm (5). The nacelle is equipped with... There is a generator connected to the blade assembly, which includes a pair of blades (6) located on the front side of the nacelle and a pair of blades (6) located on the rear side of the nacelle. The pair of blades (6) located on the front side of the nacelle and the pair of blades (6) located on the rear side of the nacelle are respectively connected to different generators. The support arm (5) includes a generator support arm (51) and a counterweight support arm (52). The generator support arm (51) and the counterweight support arm (52) are connected to each other and are hinged on the floating platform (4) through the connecting parts. The generator support arm (51) and the counterweight support arm (52) have different lengths and are arranged in a cross pattern. The floating platform (4) is provided with a drive mechanism (7) for driving the support arm (5) to rotate relative to the floating platform (4) to adjust the height of the nacelle's center of gravity.

2. The floating wind turbine generator according to claim 1, characterized in that, The cross-section of the anti-slip plate (1) is an airfoil structure.

3. A method for applying the floating wind turbine generator as described in claim 1 or 2, characterized in that, include: S101, detect the acceleration signals in the lateral, longitudinal and vertical directions respectively, with the lateral and longitudinal directions forming a horizontal plane and the vertical direction being the vertical direction. If the acceleration signals in the lateral, longitudinal and vertical directions do not exceed the preset threshold, then jump to step S102; otherwise, jump to step S103. S102, the lifting mechanism (2) stops working or remains in the stopped working state; the vector sum of the horizontal and vertical acceleration signals is used to obtain the direction of motion of the floating wind turbine, and the sway damping plate (1) is rotated by the rotating mechanism (3) so that the front edge of the sway damping plate (1) faces the opposite direction of the direction of motion of the floating wind turbine to achieve passive sway reduction, and the process jumps to step S101. S103, calculate the vector sum of the lateral and longitudinal acceleration signals to obtain the motion direction of the floating wind turbine, and rotate the anti-sway plate (1) through the rotating mechanism (3) so that the front edge of the anti-sway plate (1) faces the opposite direction of the motion direction of the floating wind turbine; and control the lifting mechanism (2) to enter the working state to lift the anti-sway plate (1) so that the anti-sway plate (1) swings up and down to achieve active anti-sway, and jump to step S101.

4. The application method of the floating wind turbine according to claim 3, characterized in that, In step S103, when the lifting mechanism (2) is put into working state to lift the damping plate (1), the amplitude of lifting the damping plate (1) is also adjusted according to the amplitude of the horizontal, longitudinal and vertical acceleration signals.

5. The application method of the floating wind turbine according to claim 4, characterized in that, In steps S102 and S103, before jumping to step S101, there is a step of waiting until the end of the current cycle. The adjustment of the amplitude of the rise and fall of the rocker plate (1) based on the amplitude of the horizontal, vertical and vertical acceleration signals includes: determining whether any of the horizontal, vertical and vertical acceleration signals exceeded the preset threshold in the previous cycle. If it did, the amplitude of the rise and fall is increased by a preset adjustment amount; otherwise, the amplitude of the rise and fall is decreased by a preset adjustment amount.

6. The application method of the floating wind turbine according to claim 5, characterized in that, It also includes detecting the current wind speed, and when the wind speed exceeds the set upper limit, lowering the boom (5) to the lowest level and locking the pair of blades (6) located on the front side of the nacelle and the pair of blades (6) located on the rear side of the nacelle in a direction parallel to the boom (5) by means of the generator brake.

7. The application method of the floating wind turbine according to claim 5, characterized in that, It also includes dynamically adjusting the height of the boom (5) according to the wind speed when the wind speed does not exceed the set upper limit but exceeds the rated wind speed, so as to achieve wind curtailment, and the height of the boom (5) is negatively correlated with the wind speed; it also includes raising the boom (5) to the highest level when the wind speed does not exceed the rated wind speed to improve power generation efficiency.

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