Wind turbine damping device with bilge keel, bilge keel mounting method and wind turbine

Abstract

The invention discloses a wind turbine damping device with a bilge keel, a bilge keel mounting method and a wind turbine, and relates to the field of wind power generation. Comprising a floating platform and a bilge keel assembly, the bilge keel assembly is arranged along the side wall of the bottom of the floating platform, the bilge keel assembly comprises an obliquely-arranged bilge keel, and the bilge keel is provided with a plurality of water passing holes used for allowing water flow to pass through and forming turbulent vortexes. Due to the fact that the obliquely-arranged bilge keel is fixed to the floating platform and provided with the water passing holes, the obliquely-arranged bilge keel makes contact with water flow more easily, resistance opposite to the rolling direction is generated, rolling of the floating platform in waves is effectively relieved, vibration of the wind turbine is remarkably reduced, and the service life of the wind turbine is prolonged. And the arranged water passing holes can increase turbulence vortex damping to reduce the rolling amplitude, and the friction area between the water passing holes and water flow is increased, so that energy dissipation is enhanced.

Description

Technical Field

[0001] The present invention relates to the field of wind power generation, and particularly to a vibration damping device for a wind turbine with bilge keels, a method for installing bilge keels, and a wind turbine. Background Art

[0002] Currently, offshore floating wind power generation is a new energy development form with strategic significance. Among them, the semi-submersible floating offshore wind turbine is a popular floating wind turbine structure type in the industry at present. However, components such as the blades, tower barrels, and floating platforms of semi-submersible floating wind turbines are extremely prone to large-amplitude and violent vibrations under the action of multi-disaster loads such as wind, waves, and currents, seriously affecting the power generation efficiency, safe operation, and service life of wind turbines.

[0003] In the prior art, in order to improve the stability of each component part of the semi-submersible floating wind turbine under the influence of multi-disaster loads such as wind, waves, and currents and reduce the vibration of each component part of the offshore floating wind power generator, the vibration damping method for the offshore semi-submersible floating wind turbine mainly adopts the method of adding various dampers such as liquids and particles inside the tower barrel or nacelle of the offshore wind turbine. The damper generates relative motion with the wind turbine inside the wind turbine and the internal structure of the damper itself moves and dissipates energy through friction to reduce the vibration of the wind turbine. However, while reducing the vibration of the wind turbine itself, due to the relatively large mass of the damper itself, this mass will generate an additional secondary bending moment on the wind turbine structure due to the horizontal displacement generated by the shaking of the offshore semi-submersible floating wind turbine under the repeated action of multi-disaster loads such as wind, waves, and currents. To a certain extent, this additional bending moment will exacerbate the fatigue damage of the wind turbine, making the wind turbine easily damaged and difficult to meet the working requirements of the wind turbine in harsh environments. Summary of the Invention

[0004] The present invention provides a vibration damping device for a wind turbine with bilge keels, a method for installing bilge keels, and a wind turbine to overcome the problem that when the wind turbine is working, it will be affected by the force of horizontal displacement, which will generate an additional secondary bending moment on the wind turbine structure. To a certain extent, this additional bending moment will exacerbate the fatigue damage of the wind turbine, making the wind turbine easily damaged and difficult to meet the working requirements of the wind turbine in harsh environments. To achieve the above object, the present invention provides the following technical solutions: A vibration damping device for a wind turbine with bilge keels includes a floating platform and a bilge keel assembly. The bilge keel assembly is arranged along the bottom side wall of the floating platform. The bilge keel assembly includes an inclined bilge keel, and a plurality of water passing holes for allowing water to pass through and form turbulent vortices are arranged on the bilge keel.

[0005] For the vibration damping device for a wind turbine with bilge keels as described above, the floating platform includes a lower chord of the platform truss, and the bilge keel assembly further includes a mounting plate arranged at one end of the bilge keel. The mounting plate is fixed on the lower chord of the platform truss.

[0006] The wind turbine vibration damping device with bilge keels as described above, the cross-sectional area of the bilge keels gradually decreases from the end close to the mounting plate to the end far from the mounting plate.

[0007] The wind turbine vibration damping device with bilge keels as described above, the size estimation of the bilge keels can be calculated according to the expected roll reduction effect q of the bilge keels on the floating platform, and can be expressed by the following formula:

[0008] Roll reduction ratio and The relational formula with is as follows in the table; The relationship between K and q

[0009] K = ÷

[0010] Where: Z g is the height of the center of gravity of the floating platform; d is the draft depth of the floating platform; A b is the total area of the bilge keels; l is the distance from the center of the bilge keels to the center of gravity of the floating platform; L is the length of the floating platform; B is the width of the floating platform; q is the roll reduction effect; K is the roll reduction ratio.

[0011] The wind turbine vibration damping device with bilge keels as described above, a plurality of the water passing holes are arranged at the end of the bilge keels far from the mounting plate, the diameter of the water passing holes is 10 - 15 mm, and the total area of the water passing holes accounts for 10% - 20% of the surface area of the bilge keels.

[0012] The wind turbine vibration damping device with bilge keels as described above, a plurality of reinforcing ribs are arranged on the bilge keels at intervals, and the reinforcing ribs are distributed along the bilge keels at intervals.

[0013] The wind turbine vibration damping device with bilge keels as described above, includes a plurality of upper chord members of the platform truss, a plurality of pontoons are arranged on the periphery of the floating platform, and two of the pontoons are connected by the upper chord members of the platform truss and the lower chord members of the platform truss.

[0014] The wind turbine vibration damping device with bilge keels as described above, a reinforcing rib is arranged between the upper chord member of the platform truss and the lower chord member of the platform truss.

[0015] A bilge keel installation method, including the wind turbine vibration damping device with a bilge keel, comprises the following steps: S1: Mark an installation part on the lower chord of the platform truss of the floating platform that coincides with the boundary line of the installation plate; S2: Fix and install the bilge keel in sections on the installation plate to form a bilge keel assembly; S3: Align and install the assembled bilge keel assembly with the installation part according to the installation part marked on the lower chord of the platform truss that coincides with the boundary line of the installation plate.

[0016] For the bilge keel installation method as described above, the S1 step further includes the following steps: S11: Measure the actual size of the installation plate and record the size; S12: Use the longest side of the detected installation plate as the first coincidence line L1 marked on the lower chord of the platform truss; S13: Use the short side of the detected installation plate as the second coincidence line L2 marked on the lower chord of the platform truss; S14: Draw the third coincidence line L3 and the fourth coincidence line L4 according to the first coincidence line L1 and the second coincidence line L2; S15: Enclose an installation part for installing the bilge keel assembly on the lower chord of the platform truss according to the marked first coincidence line L1, second coincidence line L2, third coincidence line L3, and fourth coincidence line L4.

[0017] A wind turbine, including the wind turbine vibration damping device with a bilge keel and a fan main body, an installation platform is provided on the floating platform, the fan main body includes a nacelle, fan blades, and a tower barrel, one end of the tower barrel is fixed to the installation platform, and the other end is fixed to the nacelle, and one end of the nacelle is provided with fan blades, and the fan blades can rotate relative to the nacelle.

[0018] Compared with the prior art, the beneficial effects of the technical solution of the present invention are as follows: (1). Since the present invention fixes an inclined bilge keel on the floating platform, and the bilge keel is provided with water passing holes, the inclined bilge keel is more likely to contact the water flow, generating a resistance opposite to the rolling direction, effectively slowing down the rolling of the floating platform in the waves, significantly reducing the vibration of the wind turbine, and the provided water passing holes can increase the turbulent vortex damping to reduce the rolling amplitude, and the increase in the friction area between the water passing holes and the water flow strengthens the energy dissipation.

[0019] (2). Since the bilge keel is provided with reinforcing ribs, it can well ensure the local stability of the bilge keel.

[0020] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] Figure 1 is a three-dimensional structure diagram of the present invention; Figure 2 is Figure 1 a partial view in A; Figure 3 is a schematic structural diagram of the bilge keel of the present invention installed on the mounting plate; Figure 4 is a schematic structural diagram of the wind turbine of the present invention; Figure 5 is the principle block Figure 1 ; Figure 6 is the principle block Figure 2 . DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0024] As Figures 1 to 3 shown, a wind turbine vibration damping device with a bilge keel includes a floating platform 1 and a bilge keel assembly 3. The bilge keel assembly 3 is arranged along the bottom side wall of the floating platform 1. The bilge keel assembly 3 includes an inclined bilge keel 31. A plurality of water passing holes 311 for allowing water to pass through and form turbulent vortices are arranged on the bilge keel 31. Since the present invention fixes an inclined bilge keel on the floating platform and water passing holes are arranged on the bilge keel, the inclined bilge keel is more likely to contact the water flow, generating a resistance opposite to the rolling direction, effectively slowing down the rolling of the floating platform in the waves, significantly reducing the vibration of the wind turbine, and the arranged water passing holes can increase the turbulent vortex damping to reduce the rolling amplitude. Moreover, the increase in the friction area between the water passing holes and the water flow strengthens the energy dissipation.

[0025] As a specific implementation manner rather than a limitation, in order to install the bilge keel assembly 3 on the floating platform 1 more stably, the floating platform 1 includes a lower chord member 13 of the platform truss, and the bilge keel assembly 3 further includes a mounting plate 32 provided at one end of the bilge keel 31. The mounting plate 32 is fixed on the lower chord member 13 of the platform truss. The mounting plate 32 is a curved surface whose shape conforms to the surface of the lower chord member 13 of the platform truss. Of course, it is not excluded that the lower chord member 13 of the platform truss has other shapes, as long as the mounting plate 32 conforms to the lower chord member 13 of the platform truss. In this application, by fitting the mounting plate 32 to the lower chord member 13 of the platform truss and then fixing it by welding, the mounting plate 32 is fixed more firmly on the lower chord member 13 of the platform truss. After the welding is completed, an anti-rust treatment can be carried out, such as by painting. In addition, the connection between the bilge keel 31 and the mounting plate 32 is made by double-sided fillet welds. Among them, the fillet weld leg height, electrode type, and the corresponding steel types of the mounting plate and the bilge keel 31 should be determined by relevant technical personnel through calculation according to the specific application environment load conditions of the vibration damping device.

[0026] Furthermore, in order to make the force distribution of the bilge keel 31 more uniform and not easily broken or damaged, the cross-sectional area of the bilge keel 31 gradually decreases from the end close to the mounting plate 32 to the end far from the mounting plate 32. Therefore, the bilge keel 31 can bear a greater force at the end close to the mounting plate 32. In fact, when the floating platform is working, the bilge keel 31 is subjected to a greater force at the end close to the mounting plate 32. Therefore, the bilge keel 31 with the above shape can better achieve this function and is not easily broken.

[0027] Furthermore, in order to design the dimensions of the bilge keel 31 that meet the requirements, preliminary calculations can be carried out according to the following formula. The size estimation of the bilge keel 31 can be calculated according to the expected roll reduction effect q of the bilge keel 31 on the floating platform 1, which can be expressed as the following formula:

[0028] Roll reduction ratio And The relationship formula is as follows: The relationship between K and q

[0029] K = ÷

[0030] Where: Z g Is the height of the center of gravity of the floating platform; d is the draft of the floating platform; A b Is the total area of the bilge keel; l is the distance from the center of the bilge keel to the center of gravity of the floating platform; L is the length of the floating platform; B is the width of the floating platform; q is the anti-rolling effect; K is the anti-rolling ratio.

[0031] As a specific implementation manner rather than a limitation, a plurality of the water passing holes 311 are arranged at one end of the bilge keel 31 far from the mounting plate 32. The diameter of the water passing holes 311 is 10 - 15 mm, and the total area of the water passing holes 311 accounts for 10% - 20% of the surface area of the bilge keel 31. The water passing holes 311 in this part can enable part of the water flow to penetrate through the water passing holes 311 during the rolling process of the floating platform 1, and the other part to flow around, forming small-scale turbulence, thereby increasing the vortex damping and enhancing the vibration reduction effect. And because the water passing holes 311 are opened, the contact surface between the bilge keel 31 and the water flow increases, so that the energy dissipation is better. And the water passing holes 311 reduce the flow velocity on the backflow surface, reduce the pressure difference on both sides of the bilge keel 31, and make the hydrodynamic load more stable. Considering the problem of the load distribution of the bilge keel 31, the water passing holes 311 are arranged at one end far from the mounting plate 32. Since the stress on the bilge keel 31 close to the mounting plate 32 is greater, it is not suitable to be arranged. And the total area of the water passing holes 311 arranged accounts for 10% - 20% of the surface area of the bilge keel 31. When the total area of the water passing holes 311 is too large, the maximum stress that the bilge keel 31 can bear is likely to decrease. When the total area of the water passing holes 311 is too small, the vibration reduction effect cannot be achieved well.

[0032] Further, in order to enable the bilge keel 31 to bear greater stress, a plurality of reinforcing ribs 34 are arranged on the bilge keel 31 at intervals, and the reinforcing ribs 34 are distributed along the bilge keel 31 at intervals. The reinforcing ribs 34 are arranged at intervals along the length direction of the bilge keel 31, and the spacing is 1.5 - 2.0 m. And the reinforcing ribs 34 are arranged on both the upper surface and the lower surface of the bilge keel 31, which can ensure the local stability of the bilge keel 31 and increase the maximum stress that the bilge keel 31 can bear. The reinforcing rib 34 is rectangular, which can improve the local stability of the bilge keel 31 under the action of cyclic loads of wind, wave and current in the marine environment and improve the fatigue failure resistance strength of the bilge keel 31. The reinforcing ribs 34 are double-sided welded by fillet welds. The reinforcing ribs 34 should be provided with over-welding holes at the overlapping parts of the connecting welds with the bilge keel 31 and the mounting plate 32 according to the specific situation to avoid stress concentration caused by the overlap of the welds.

[0033] As a specific implementation manner rather than a limitation, it includes a plurality of upper chord members 14 of the platform truss. A plurality of pontoons 11 are arranged on the peripheral side of the floating platform 1. The two pontoons 11 are connected by the upper chord member 14 of the platform truss and the lower chord member 13 of the platform truss. Reinforcing ribs 15 are arranged between the upper chord member 14 of the platform truss and the lower chord member 13 of the platform truss. In this application, four pontoons 11 are provided, and the four pontoons are respectively arranged at the four corners of the floating platform 1 to form a rectangle. The pontoons 11 are used to generate buoyancy so that the entire device can float on the sea surface. In order to make the floating platform 1 more stable and capable of withstanding greater forces, reinforcing ribs 15 are also provided between the lower chord member 13 of the platform truss and the upper chord member 14 of the platform truss. The reinforcing ribs 15 are inclined, forming a plurality of triangles between the lower chord member 13 of the platform truss and the upper chord member 14 of the platform truss to make it more stable.

[0034] As Figure 5 shown in a bilge keel installation method, including the wind turbine vibration damping device with a bilge keel, which includes the following steps: S1: Mark an installation part on the lower chord member 13 of the platform truss of the floating platform 1 that coincides with the boundary line of the mounting plate 32; temporarily fix the mounting plate 32 on the lower chord member 13 of the platform truss, and an oil-based pen or a scribing tool such as a chalk line can be used for marking. When manufacturing and installing the wind turbine vibration damping device with a bilge keel, since most of it is installed on the sea surface and generates electricity through the wind at sea, due to the changeable and harsh marine environment, the quality requirements for the wind turbine vibration damping device with a bilge keel are relatively high. Before installation, it is usually necessary to detect each part. Ultrasonic detection can be selected to detect by using high-frequency sound waves to penetrate the material and judge internal defects such as cracks and pores through the reflected waves. Installation can only be carried out after the detection is completed and the parts are qualified.

[0035] Furthermore, referring to Figure 6 shown, in order to determine the installation part, step S1 further includes: S11: Measure the actual size of the mounting plate 32 and record the size; S12: Use the longest side of the detected mounting plate 32 as the first coincidence line L1 marked on the lower chord member 13 of the platform truss; attach the mounting plate 32 to the lower chord member 13 of the platform truss, and use an oil-based pen or the like to mark along the longest side of the mounting plate 32 as the basis to obtain the first coincidence line L1.

[0036] S13: Draw the second coincidence line L2 on the lower chord 13 of the platform truss based on the detected short side of the mounting plate 32: In practice, since the mounting plate 32 is a curved surface structure, the curved surface of the mounting plate 32 itself can be used to draw the curve, and an accurate curve can be obtained. In addition, the mounting plate 32 itself can be referred to, and two reference points can be drawn with the mounting plate 32 as a reference, and the two references can be connected.

[0037] S14: Draw a third coincidence line L3 and a fourth coincidence line L4 based on the first coincidence line L1 and the second coincidence line L2. Draw a fourth coincidence line L4 parallel to the second coincidence line L2 at the end of the first coincidence line L1 away from the second coincidence line L2, and then connect the endpoints of the second coincidence line L2 and the fourth coincidence line L4 to draw the third coincidence line L3.

[0038] S15: According to the first coincidence line L1, the second coincidence line L2, the third coincidence line L3, and the fourth coincidence line L4, the installation part for installing the bilge keel assembly 3 on the lower chord 13 of the platform truss is enclosed. After the installation part is enclosed, it is usually necessary to check whether it is qualified. Optical and image measurement methods can be used. By taking pictures of parts with a camera, the images are imported into software, such as visual processing software such as OpenCV, and the area is extracted by combining the algorithms provided by OpenCV, such as edge detection, threshold segmentation, etc., to automatically identify the area and calculate it. The calculated area is then compared with the standard area to finally confirm whether it is qualified.

[0039] S2: The bilge keel 31 is fixedly mounted on the mounting plate 32 in sections to form the bilge keel assembly 3; the bilge keel 31 and the mounting plate 32 are connected by double-sided fillet welds. Among them, the weld leg height of the fillet weld, the type of welding rod, and the steel type of the corresponding mounting plate 32 and the bilge keel 31 should be determined by calculation by relevant technical personnel based on the specific application environment load conditions of the vibration reduction device. In addition, the installation position and angle of the bilge keel 31 on the mounting plate 32 are determined based on the principle that the bilge keel 31 should be set at the position farthest from the rolling center of the floating platform. This setting principle is intended to enable the bilge keel 31 to generate as large a stabilizing moment as possible during the rolling process of the floating platform to offset the overturning moment.

[0040] S3: According to the installation part that is drawn on the lower chord of the platform truss 13 and coincides with the boundary line of the installation plate 32, the assembled bilge keel assembly 3 is aligned and installed with the installation part. The reinforcing ribs 34 are welded and installed in sections at the symmetrical positions on both sides of the bilge keel 31. After the bilge keel 31 is welded and fixed on the installation plate 32 to form the bilge keel assembly 3, the bilge keel assembly 3 is aligned with the installation part, and then welded, and finally the installation of the bilge keel assembly 3 is completed.

[0041] A wind turbine, referring to Figure 4As shown, it includes the wind turbine vibration damping device with bilge keels and the fan main body 2. An installation platform 12 is provided on the floating platform 1. The fan main body 2 includes a nacelle 21, fan blades 22 and a tower barrel 23. One end of the tower barrel 23 is fixed on the installation platform 12, and the other end is fixed to the nacelle 21. One end of the nacelle 21 is provided with fan blades 22, and the fan blades 22 can rotate relative to the nacelle 21. The installation platform 12 is fixedly connected to a plurality of pontoons 11, and the installation platform 12 is perpendicular to the plane formed by the lower chord member 13 and the upper chord member 14 of the platform truss. Electricity is generated by the wind blowing the wind blades and utilizing the wind power.

[0042] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed invention.

Claims

1. A wind turbine vibration reduction device with a bilge keel, characterized in that: The invention comprises a floating platform (1) and a bilge keel assembly (3), wherein the bilge keel assembly (3) is arranged along the bottom side wall of the floating platform (1), the bilge keel assembly (3) comprises an inclined bilge keel (31), and the bilge keel (31) is provided with a plurality of water holes (311) for allowing water to pass through and form turbulent vortices.

2. The wind turbine vibration reduction device with bilge keel according to claim 1, characterized in that: The floating platform (1) comprises a platform truss lower chord (13), and the bilge keel assembly (3) further comprises a mounting plate (32) arranged at one end of the bilge keel (31), wherein the mounting plate (32) is fixed to the platform truss lower chord (13).

3. The wind turbine vibration reduction device with bilge keel according to claim 2, characterized in that: The cross-sectional area of ​​the bilge keel (31) gradually decreases from an end close to the mounting plate (32) to an end away from the mounting plate (32).

4. The wind turbine vibration reduction device with bilge keel according to claim 2, characterized in that: The size of the bilge keel (31) can be estimated by calculating the expected anti-rolling effect q of the bilge keel (31) on the floating platform (1), which can be expressed as the following formula: Anti-roll ratio and The relationship is as follows: The relationship between K and q K= ÷ in: Z g is the height of the center of gravity of the floating platform; d is the draft of the floating platform; A b is the total area of ​​bilge keel; l is the distance from the center of the bilge keel to the center of gravity of the floating platform; L is the length of the floating platform; B is the width of the floating platform; q is the anti-roll effect; K is the anti-roll ratio.

5. The wind turbine vibration reduction device with bilge keel according to claim 2, characterized in that: A plurality of water holes (311) are arranged at one end of the bilge keel (31) away from the mounting plate (32); the diameter of the water holes (311) is 10-15 mm; and the total area of ​​the water holes (311) accounts for 10%-20% of the surface area of ​​the bilge keel (31).

6. The wind turbine vibration reduction device with bilge keel according to claim 2, characterized in that: A plurality of reinforcing ribs (34) are arranged at intervals on the bilge keel (31), and the reinforcing ribs (34) are distributed at intervals along the bilge keel (31).

7. The wind turbine vibration reduction device with bilge keel according to claim 2, characterized in that: The floating platform (1) comprises a plurality of platform truss upper chords (14), a plurality of pontoons (11) are arranged around the floating platform (1), two pontoons (11) are connected via the platform truss upper chord (14) and the platform truss lower chord (13), and reinforcing ribs (15) are arranged between the platform truss upper chord (14) and the platform truss lower chord (13).

8. A bilge keel installation method, characterized in that: The wind turbine vibration reduction device with bilge keel according to any one of claims 2 to 7 comprises the following steps: S1: Drawing a mounting portion on the lower chord (13) of the platform truss of the floating platform (1) that coincides with the boundary line of the mounting plate (32); S2: The bilge keel (31) is fixedly mounted in sections on the mounting plate (32) to form a bilge keel assembly (3); S3: A mounting portion that coincides with the boundary line of the mounting plate (32) is drawn on the lower chord (13) of the platform truss, and the assembled bilge keel assembly (3) is aligned and installed with the mounting portion.

9. The bilge keel installation method according to claim 8, characterized in that: The S1 step further includes the following steps: S11: Measure the actual size of the mounting plate (32) and record the size; S12: Using the longest side of the detected mounting plate (32) as the first coincidence line L1 to be drawn on the lower chord (13) of the platform truss; S13: Draw a second coincidence line L2 on the lower chord (13) of the platform truss based on the short side of the detected mounting plate (32): S14: Draw a third coincidence line L3 and a fourth coincidence line L4 according to the first coincidence line L1 and the second coincidence line L2; S15: Based on the first coincidence line L1, the second coincidence line L2, the third coincidence line L3, and the fourth coincidence line L4, a mounting portion for mounting the bilge keel assembly (3) on the lower chord (13) of the platform truss is enclosed.

10. A wind turbine, characterized in that: The wind turbine vibration reduction device with a bilge keel as claimed in any one of claims 1 to 7 and a wind turbine body (2), wherein a mounting platform (12) is provided on the floating platform (1), and the wind turbine body (2) comprises a nacelle (21), wind turbine blades (22) and a tower (23), one end of the tower (23) is fixed to the mounting platform (12), and the other end is fixed to the nacelle (21), and one end of the nacelle (21) is provided with a wind turbine blade (22), and the wind turbine blade (22) can rotate relative to the nacelle (21).

Images