A vibration control device and control method for a floating wind turbine

Abstract

The present invention provides a vibration control device and a control method for a floating wind turbine, and belongs to the technical field of marine power generation equipment. The vibration control device includes a wind turbine column and a vibration control component. A wind turbine unit is arranged on the top of the wind turbine column, and the vibration control component includes a rigid swing arm, a damper and a universal joint. Universal joints are provided for the corresponding rigid swing arm and the damper. One end of the rigid swing arm is rotatably connected to the wind turbine column through the corresponding universal joint. The rigid swing arm is arranged at an angle to the wind turbine column and the other end faces a side away from the wind turbine unit. The other end of the rigid swing arm is connected to an anchor cable. One end of the damper is rotatably connected to the wind turbine column through the corresponding universal joint, and the other end of the damper is hinged to the rigid swing arm. The vibration control device and the control method for a floating wind turbine provided by the embodiment of the present invention can effectively improve the vibration control effect of the floating wind turbine and increase the overall service life.

Description

Technical Field

[0001] The present invention relates to the technical field of marine power generation equipment, and in particular to a vibration control device and a control method for a floating wind turbine. Background Art

[0002] In recent years, with the substantial increase in human demand for electricity and the negative impact of coal, oil, natural gas and other energy sources on humans, the development of new energy has become an important way for people to resist environmental pollution. There are abundant power generation resources at sea, which can be used to generate electricity through hydropower, wind power, tidal power and other means. Using offshore wind power generation can provide humans with a large amount of renewable clean energy, and using offshore wind turbine platforms for wind power generation has become an important direction for the development of new energy in countries around the world.

[0003] For deep-sea floating wind turbines, the supporting structure is an important component, bearing the dual alternating loads of hydrodynamics and aerodynamics. During its entire life cycle, the number of fatigue load cycles is very high. In addition, its structure is highly flexible and the working environment is harsh. In extreme sea conditions, the dynamic response is large, and the vibration of its supporting structure is particularly obvious, which is very easy to induce fatigue damage. In related technologies, damping elements are usually set at the connection structure between the wind turbine column and the underwater anchor cable to buffer and control vibration.

[0004] Although the method of setting damping elements in the related technology can reduce the vibration impact of offshore waves and currents on the floating wind turbine structure to a certain extent, under complex marine conditions, the loads generated by deep-sea wind, waves and currents on the floating wind turbine structure often exist in multiple directions. The damping elements set in a single direction have limited ability to alleviate and dissipate the vibrations generated by loads in multiple directions, resulting in poor vibration control effects, and are prone to damage due to long-term load impacts, and have a low overall service life. Summary of the invention

[0005] The embodiment of the present invention provides a vibration control device and control method for a floating wind turbine, which can effectively improve the vibration control effect of the floating wind turbine and increase the overall service life. The technical solution is as follows: In a first aspect, an embodiment of the present invention provides a vibration control device for a floating wind turbine, the vibration control device for a floating wind turbine comprising: A fan column, a fan unit is arranged on the top of the fan column; A vibration control component includes a rigid rotating arm, a damper and a universal joint. The universal joint is connected to the rigid rotating arm and the damper. One end of the rigid rotating arm is rotatably connected to the fan column through the corresponding universal joint. The rigid rotating arm is arranged at an angle to the fan column and the other end faces a side away from the fan unit. The other end of the rigid rotating arm is connected to an anchor cable. One end of the damper is rotatably connected to the fan column through the corresponding universal joint, and the other end of the damper is hinged to the rigid rotating arm.

[0006] Optionally, the vibration control components are provided in multiple groups and are arranged at equal angles around the fan column.

[0007] Optionally, the universal joint is configured to be rotatable around an outer peripheral wall of the fan column.

[0008] Optionally, the universal joint includes a yoke and a cross shaft, the yoke is connected to the fan column, two coaxial shaft ends of the cross shaft are rotatably connected to the yoke through a torsion spring, and the rigid swing arm and one end of the damper are rotatably connected to the other two coaxial shaft ends of the cross shaft.

[0009] Optionally, the yoke is detachably connected to the fan column.

[0010] Optionally, a tuned liquid damper is arranged inside the fan column.

[0011] Optionally, a cable guide hole is provided at the other end of the rigid rotating arm.

[0012] In a second aspect, an embodiment of the present invention provides a control method, which is implemented based on the vibration control device for a floating wind turbine described in the first aspect, and includes: In the vertical direction, the hinged portion between the universal joint and the other end of the damper and the rigid rotating arm is used to provide the rigid rotating arm and the damper with the freedom to perform longitudinal rotation relative to the fan column under the action of an external load, so as to dissipate the energy generated by the vibration through the damping force generated by the damper; In the horizontal direction, the universal joint is used to provide the rigid rotating arm and the damper with the freedom to rotate horizontally synchronously relative to the fan column under the action of external load, so as to reduce the load impact on the connection between the rigid rotating arm, the damper and the fan column.

[0013] The beneficial effects brought about by the technical solution provided by the embodiment of the present invention include at least: By adopting the vibration control device for a floating wind turbine provided by an embodiment of the present invention, a vibration control component is arranged to cooperate with a wind turbine column. When the floating wind turbine vibrates at sea due to an external load, the movement of the anchor cable drives the rigid rotating arm and the wind turbine column to change the angle in all directions. While reducing the rigid fatigue damage at the connection position, the deformation of the damper connected between the rigid rotating arm and the wind turbine column is used to dissipate and relieve the load stress, thereby reducing the overall vibration, which can effectively improve the vibration control effect of the floating wind turbine and increase the overall service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 is a schematic structural diagram of a vibration control device for a floating wind turbine provided by an embodiment of the present invention; Figure 2 is a schematic diagram of the distribution structure of the vibration control components of the vibration control device for a floating wind turbine provided by an embodiment of the present invention; Figure 3 is a partial structural schematic diagram of a vibration control assembly provided by an embodiment of the present invention; Figure 4 is a schematic diagram of a partial structure of a universal joint provided in an embodiment of the present invention; Figure 5 It is a flow chart of a control method provided by an embodiment of the present invention.

[0016] In the figure: 1-fan column; 2-vibration control assembly; 3-anchor cable; 11-fan unit; 12-tuned liquid damper; 21-rigid swing arm; 22-damper; 23-universal joint; 211-fairguide hole; 231-yoke; 232-cross shaft; 2321-torsion spring. DETAILED DESCRIPTION

[0017] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0018] In the related art, the vibration control of floating wind turbines usually adopts the method of setting damping elements at the connection structure between the wind turbine column and the underwater anchor cable to buffer and control the vibration. Although this setting method can reduce the vibration impact of offshore waves and currents on the floating wind turbine structure to a certain extent. Under complex marine conditions, the loads generated by deep-sea wind, waves and currents on the floating wind turbine structure often exist in multiple directions. The damping elements set in a single direction have limited ability to alleviate and dissipate the vibrations generated by loads in multiple directions, resulting in poor vibration control effect, and easy damage due to long-term load impact, and a low overall service life.

[0019] Figure 1 is a schematic structural diagram of a vibration control device for a floating wind turbine provided by an embodiment of the present invention; Figure 2 is a schematic diagram of the distribution structure of the vibration control components of the vibration control device for a floating wind turbine provided by an embodiment of the present invention; Figure 3 is a partial structural schematic diagram of a vibration control assembly provided by an embodiment of the present invention; Figure 4 FIG. 1 is a schematic diagram of a partial structure of a universal joint provided by an embodiment of the present invention. Figures 1 to 4 As shown, through practice, an embodiment of the present invention provides a vibration control device for a floating wind turbine, including a wind turbine column 1 and a vibration control assembly 2 .

[0020] Among them, a fan unit 11 is arranged on the top of the fan column 1. The vibration control component 2 includes a rigid rotating arm 21, a damper 22 and a universal joint 23. The rigid rotating arm 21 and the damper 22 are both provided with a universal joint 23. One end of the rigid rotating arm 21 is rotatably connected to the fan column 1 through the corresponding universal joint 23. The rigid rotating arm 21 is arranged at an angle with the fan column 1 and the other end faces the side away from the fan unit 11. The other end of the rigid rotating arm 21 is connected to the anchor cable 3. One end of the damper 22 is rotatably connected to the fan column 1 through the corresponding universal joint 23, and the other end of the damper 22 is hinged to the rigid rotating arm 21.

[0021] In the embodiment of the present invention, the wind turbine column 1 is suspended on the water surface in a vertical state by means of a built-in ballast tank or an external floating platform. The lower half of the column is anchored to the seabed by an anchor cable 3 connected to the free end of the rigid rotating arm 21, and the top is extended above the sea surface, and the wind turbine unit 11 at the top is used to generate wind power. In order to cope with the longitudinal and horizontal multi-directional loads on the entire floating wind turbine structure on the sea surface, the top of the rigid rotating arm 21 is connected to the outer peripheral wall of the wind turbine column 1 through a universal joint 23. Correspondingly, the damper 22, which is laterally connected between the rigid rotating arm 21 and the wind turbine column 1, is also connected to the wind turbine column 1 by a universal joint 23. The universal joint 23 is used to provide the rigid swivel arm 21 and the damper 22 with the freedom to synchronously rotate horizontally relative to the wind turbine column 1 under the action of external loads. When subjected to loads generated by lateral wind and waves, the rigid swivel arm 21 can rotate relative to the wind turbine column 1 in the horizontal direction together with the damper 22, thereby reducing the load impact on the connection between the rigid swivel arm 21, the damper 22 and the wind turbine column 1 at sea. In the vertical direction, by arranging the universal joint 23 and the hinged part between the other end of the damper 22 and the rigid swing arm 21, the rigid swing arm 21 and the damper 22 are provided with the freedom of longitudinal rotation relative to the fan column 1 under the action of external load, so that when subjected to the load generated by the longitudinal wave current, the rigid swing arm 21 can rotate relative to the fan column 1 to produce an angle change, and the damper 22 transversely connected between the rigid swing arm 21 and the fan column 1 can have both ends relatively rotated relative to the fan column 1 or the rigid swing arm 21 to avoid rigid fatigue damage, and at the same time, the damping force generated by the damper 22 dissipates the energy generated by the vibration. By adopting the vibration control device for a floating wind turbine provided by an embodiment of the present invention, a vibration control component 2 is arranged to cooperate with a wind turbine column 1. When the floating wind turbine vibrates at sea due to an external load, the movement of the anchor cable 3 drives the rigid rotating arm 21 and the wind turbine column 1 to change the angle in all directions. While reducing the rigid fatigue damage at the connection position, the deformation of the damper 22 connected between the rigid rotating arm 21 and the wind turbine column 1 is used to dissipate and relieve the load stress, thereby reducing the overall vibration, which can effectively improve the vibration control effect of the floating wind turbine and increase the overall service life.

[0022] Exemplarily, in an embodiment of the present invention, the damper 22 may be a viscoelastic damper, a viscous damper or a capacitive damper. Different types or specifications of dampers 22 may be selected according to the installation position and size in the working environment of the floating wind turbine and the main vibration frequency to be targeted. The present invention is not limited thereto.

[0023] Optionally, multiple groups of vibration control components 2 are provided, and are arranged at equal angles around the wind turbine column 1. Exemplarily, in an embodiment of the present invention, three groups of vibration control components 2 are provided around the wind turbine column 1, and the rigid rotating arms 21 of two adjacent groups of control components 2 are arranged at 120° intervals. By arranging the vibration control components 2 at equal angles, while achieving underwater multi-point anchoring and ensuring the stability of the wind turbine column, it is ensured that the vibration control components 2 can evenly bear and dissipate loads in multiple directions, further improving the vibration control capability.

[0024] Optionally, the universal joint 23 is configured to rotate around the outer peripheral wall of the fan column 1. Figure 3 , a rotating motor can be arranged at the position of the universal joint 23 and the outer peripheral wall of the fan column 1, and a slide rail can be arranged around the outer peripheral wall of the fan column 1 to achieve the position offset adjustment of the same group of vibration control components 2 around the fan column 1 to adapt to different sea surface working conditions. When transporting the overall structure, the relative position of the universal joint 23 can be adjusted to rotate multiple groups of vibration control components 2 to be adjacent to each other, so that the rigid rotating arm 21 and the damper 22 are concentrated on one side, which is convenient for placement and storage, and improves the overall practicality.

[0025] Optionally, the universal joint 23 includes a yoke 231 and a cross shaft 232, the yoke 231 is connected to the fan column 1, two coaxial ends of the cross shaft 232 are rotationally connected to the yoke 231 through a torsion spring 2321, and one end of the rigid swing arm 21 and the damper 22 are rotationally connected to the other two coaxial ends of the cross shaft 232. Exemplarily, in an embodiment of the present invention, when subjected to a load generated by lateral wind and waves, the rigid swing arm 21 can rotate relative to the fan column 1 in the horizontal direction together with the damper 22, at which time the cross shaft 232 drives one end of the torsion spring 2321 to rotate to generate a rotational torque, and after the load stress is dissipated, under the elastic action of the torsion spring 2321, the horizontally rotating rigid swing arm 21 and the damper 22 will automatically rotate and reset to the initial state, thereby ensuring the balance and setting stability of the entire fan column 1.

[0026] Optionally, the yoke 231 is detachably connected to the fan column 1. For example, in the embodiment of the present invention, after a certain period of work, the yoke 231 can be released from the connection with the fan column 1 to achieve the overall and partial disassembly and replacement of the universal joint 23, the rigid arm 21 and / or the damper 22, thereby improving the overall service life.

[0027] Optionally, a tuned liquid damper 12 is provided inside the wind turbine column 1. Exemplarily, in an embodiment of the present invention, a liquid container such as a fixed water tank is provided inside the wind turbine column 1, and liquid is poured into or discharged from the ballast water tank of the floating wind turbine through a dedicated or shared pipeline to form a tuned liquid damper 12 structure. When the wind turbine column 1 is subjected to load and vibrates, the liquid inside it can form standing waves under vibration excitation, and the vibration control effect is further improved through viscous shear force and wave breaking energy dissipation. Furthermore, baffles, grilles or porous plates can be added inside the liquid container forming the tuned liquid damper 12 to increase the resistance of the internal liquid flow process and enhance the damping effect.

[0028] Optionally, the other end of the rigid swivel arm 21 is provided with a cable guide hole 211. For example, in the embodiment of the invention, the automatic end of the rigid swivel arm 21 is provided with a cable guide hole 211, which is convenient for replacing and connecting anchor cables 3 of different materials such as steel cables and synthetic fiber cables according to actual needs.

[0029] Figure 5 is a flow chart of a control method provided by an embodiment of the present invention. Figure 5 As shown, the embodiment of the present invention provides a control method based on Figures 1 to 4 The vibration control device for a floating wind turbine shown in the embodiment includes: S1, in the vertical direction, the universal joint 23 and the other end of the damper 22 are used to form a hinge with the rigid swing arm 21, so as to provide the rigid swing arm 21 and the damper 22 with the freedom to rotate longitudinally relative to the fan column 1 under the action of external load, so as to dissipate the energy generated by the vibration through the damping force generated by the damper 22.

[0030] Specifically, in order to cope with the longitudinal and horizontal multi-directional loads on the entire floating wind turbine structure on the sea surface, the top of the rigid arm 21 is connected to the outer peripheral wall of the wind turbine column 1 through a universal joint 23. Correspondingly, the damper 22, which is laterally connected between the rigid arm 21 and the wind turbine column 1, is also connected to the wind turbine column 1 through a universal joint 23. By setting the universal joint 23 and the hinged part of the other end of the damper 22 and the rigid arm 21, the rigid arm 21 and the damper 22 are provided with the freedom of longitudinal rotation relative to the wind turbine column 1 under the action of external loads, so that when subjected to the load generated by the longitudinal wave current, the rigid arm 21 can rotate relative to the wind turbine column 1 to produce an angle change, and the damper 22, which is laterally connected between the rigid arm 21 and the wind turbine column 1, can rotate relative to the wind turbine column 1 or the rigid arm 21 at both ends to avoid rigid fatigue damage, and at the same time, the damping force generated by the damper 22 dissipates the energy generated by vibration.

[0031] S2, in the horizontal direction, the universal joint 23 is used to provide the rigid rotating arm 21 and the damper 22 with the freedom of synchronous horizontal rotation relative to the fan column 1 under the action of external load, so as to reduce the load impact on the connection between the rigid rotating arm 21, the damper 22 and the fan column 1.

[0032] Specifically, the universal joint 23 is used to provide the rigid swivel arm 21 and the damper 22 with the freedom to rotate synchronously horizontally relative to the wind turbine column 1 under the action of external loads, so that when subjected to loads generated by lateral wind and waves, the rigid swivel arm 21 can rotate relative to the wind turbine column 1 in the horizontal direction together with the damper 22, thereby reducing the load impact on the connection between the rigid swivel arm 21, the damper 22 and the wind turbine column 1 at sea.

[0033] The vibration control device for a floating wind turbine provided in an embodiment of the present invention is used to control the vibration of the floating wind turbine based on the above control method. By arranging the vibration control component 2 to cooperate with the wind turbine column 1, when the floating wind turbine vibrates at sea following the external load, the rigid rotating arm 21 and the wind turbine column 1 are driven to change the angle in all directions under the movement of the anchor cable 3. While reducing the rigid fatigue damage at the connection position, the deformation of the damper 22 connected between the rigid rotating arm 21 and the wind turbine column 1 is used to dissipate and relieve the load stress, thereby reducing the overall vibration, which can effectively improve the vibration control effect of the floating wind turbine and increase the overall service life.

[0034] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar words used in the patent application specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantity limitation, but indicate the existence of at least one. Words such as "include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" cover the elements or objects listed after "include" or "comprise" and are extremely equivalent, and do not exclude other elements or objects. Words such as "connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0035] The above descriptions are merely optional embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vibration control device for a floating wind turbine, characterized in that: include: A fan column (1), wherein a fan unit (11) is arranged on the top of the fan column (1); A vibration control component (2) comprises a rigid rotating arm (21), a damper (22) and a universal joint (23), wherein the rigid rotating arm (21) and the damper (22) are both connected to the universal joint (23), one end of the rigid rotating arm (21) is rotatably connected to the fan column (1) via the corresponding universal joint (23), the rigid rotating arm (21) and the fan column (1) are arranged at an angle and the other end faces a side away from the fan unit (11), the other end of the rigid rotating arm (21) is connected to an anchor cable (3), one end of the damper (22) is rotatably connected to the fan column (1) via the corresponding universal joint (23), and the other end of the damper (22) is hinged to the rigid rotating arm (21).

2. The vibration control device for a floating wind turbine according to claim 1, characterized in that: The vibration control components (2) are provided in multiple groups and are arranged at equal angles around the fan column (1).

3. The vibration control device for a floating wind turbine according to claim 1, characterized in that: The universal joint (23) is configured to be rotatable around the outer peripheral wall of the fan column (1).

4. The vibration control device for a floating wind turbine according to claim 1, characterized in that: The universal joint (23) comprises a yoke (231) and a cross shaft (232); the yoke (231) is connected to the fan column (1); two coaxial shaft ends of the cross shaft (232) are rotationally connected to the yoke (231) via a torsion spring (2321); and the rigid rotating arm (21) and one end of the damper (22) are rotationally connected to the other two coaxial shaft ends of the cross shaft (232).

5. The vibration control device for a floating wind turbine according to claim 4, characterized in that: The yoke (231) is detachably connected to the fan column (1).

6. The vibration control device for a floating wind turbine according to claim 1, characterized in that: A tuning liquid damper (12) is arranged inside the fan column (1).

7. The vibration control device for a floating wind turbine according to claim 1, characterized in that: The other end of the rigid rotating arm (21) is provided with a cable guide hole (211).

8. A control method, implemented based on the vibration control device of a floating wind turbine according to any one of claims 1 to 7, characterized in that: include: In the vertical direction, the hinged portion between the universal joint (23) and the other end of the damper (22) and the rigid rotating arm (21) is used to provide the rigid rotating arm (21) and the damper (22) with a degree of freedom for longitudinal rotation relative to the fan column (1) under the action of an external load, so as to dissipate energy generated by vibration through the damping force generated by the damper (22); In the horizontal direction, the universal joint (23) is used to provide the rigid rotating arm (21) and the damper (22) with the freedom to perform synchronous horizontal rotation relative to the fan column (1) under the action of an external load, so as to reduce the load impact on the connection between the rigid rotating arm (21), the damper (22) and the fan column (1).

Images