Floating wind turbine floating body, wind turbine generator system and control method

Abstract

A floating wind turbine floating body, a wind turbine generator system and a control method. The floating wind turbine floating body comprises: a main column (220) configured to support a tower (10); first connection bodies (230), wherein a plurality of first connection bodies (230) are arranged at intervals in the circumferential direction of the main column (220) and are separately connected to the main column (220); and auxiliary columns (210), wherein a plurality of auxiliary columns (210) are distributed at intervals in the circumferential direction; the end of each first connection body (230) facing away from the main column (220) is connected to one auxiliary column (210); each auxiliary column (210) has a first static chamber (211) and a first dynamic chamber (213) which are independently provided; a first medium (212) is sealed in the first static chamber (211); each auxiliary column (210) is provided with a first opening (214) and a first control valve (215) which are in communication with the first dynamic chamber (213); and the first control valve (215) controls the opening and closing of the first opening (214), so as to adjust the volume of seawater (219) that enters inside the first dynamic chamber (213). The floating wind turbine floating body has a fast response speed and a good stabilizing effect.

Description

Floating wind turbine float, wind turbine generator set and control method

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202310816298.2 filed on June 29, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of wind power technology, and in particular to a floating wind turbine body, a wind turbine generator set, and a control method. Background Art

[0004] The wind power industry continues to contribute to the achievement of the dual carbon goals. Wind turbines are currently developing in the direction of larger single-unit capacity, lighter overall weight, intelligentization, and offshore applications. Statistics show that the cumulative installed capacity of offshore wind power is increasing annually. With the large-scale development of offshore resources, the development and utilization of deep-sea resources has attracted considerable attention. Within this industry scenario, floating wind turbines are gradually gaining momentum and will become a major contributor to the subsequent development of offshore wind power.

[0005] The wind turbine float is used to support the tower, nacelle and other components of the floating wind turbine generator set. When the unit faces wind loads, wave loads, ocean current loads, ice loads, etc., from the perspective of the overall machine dynamics, due to the "floating" characteristics of the floating wind turbine generator set, the wind turbine float has all-round six degrees of freedom. Under the intertwined coupling of external load randomness and the complexity of the unit's own motion, the overall linear characteristics of the floating wind turbine generator set become more complex. The motion stability of the floating wind turbine generator set is one of the most important indicators to ensure the continuous, stable, safe and efficient output of the unit and to ensure power generation. Therefore, how to ensure the stability of the floating wind turbine generator set is one of the problems that need to be urgently solved in the wind power field.

[0006] The wind turbine float in the related art mainly adjusts the overall inclination angle of the wind turbine float by controlling the mutual circulation of fluids between different floats, so as to ensure the stability of the floating wind turbine generator set where the wind turbine float is located. However, this design method makes the overall displacement of the wind turbine float unchanged, the response speed is slow and the stability effect is poor.

[0007] Summary of the Invention

[0008] The embodiments of the present application provide a floating wind turbine float, a wind turbine generator set, and a control method. The floating wind turbine float has a fast response speed and a good stability effect.

[0009] On the one hand, according to an embodiment of the present application, a floating wind turbine buoy is proposed, which can be set in seawater and used to support a tower. The floating wind turbine buoy includes: a main column, used to support the tower; a first connector, a plurality of first connectors are arranged at intervals in the circumferential direction of the main column and are respectively connected to the main column; an auxiliary column, the number of auxiliary columns is multiple and they are distributed at intervals in the circumferential direction, and each first connector is connected to an auxiliary column at one end facing away from the main column; wherein the auxiliary column has an independently arranged first static chamber and a first dynamic chamber, a first medium is enclosed in the first static chamber, and a first opening connected to the first dynamic chamber and a first control valve are provided on the auxiliary column, the first control valve controls the opening and closing of the first opening to adjust the volume of seawater entering the first dynamic chamber.

[0010] On the other hand, according to an embodiment of the present application, a wind turbine generator set is proposed, including: the above-mentioned floating wind turbine float; a wind turbine body, arranged on a main column, the wind turbine body including a tower connected to the main column, a cabin arranged on the tower, and an impeller arranged on the cabin.

[0011] On the other hand, according to an embodiment of the present application, a control method of the above-mentioned wind turbine generator set is proposed, including:

[0012] Get the current power information of the wind turbine;

[0013] If the current power information continues to exceed the first threshold within a preset time period, the tilt angle information of the floating wind turbine body is obtained;

[0014] When the tilt angle information exceeds the preset range, the target auxiliary column that needs to be adjusted is determined based on the tilt angle information, the direction of the incoming wind, and the target posture information corresponding to the target posture to be adjusted;

[0015] The volume of seawater in the target auxiliary column is adjusted until the floating wind turbine body reaches the target posture.

[0016] According to the floating wind turbine buoy, wind turbine generator set, and control method provided in the embodiments of the present application, the floating wind turbine buoy includes a main column, a plurality of auxiliary columns, and a first connector. The main column is used to support the tower, and the plurality of auxiliary columns are spaced apart circumferentially around the main column and are respectively connected to the main column via the first connector. This ensures the integrity of the floating wind turbine buoy. Since the auxiliary column has an independently arranged first static chamber and a first dynamic chamber, a first medium is enclosed in the first static chamber, and a first opening and a first control valve connected to the first dynamic chamber are provided on the auxiliary column, when it is necessary to adjust the displacement of any auxiliary column among the multiple auxiliary columns, the first opening can be directly controlled to open through the first control valve to adjust the volume of seawater in the first dynamic chamber of the auxiliary column. This can quickly change the weight of a single auxiliary column and the displacement of the entire floating wind turbine buoy, so as to quickly respond to the influence of wind load, wave load, ocean current load, ice load, etc. On the basis of ensuring the overall stability of the floating wind turbine buoy and the wind turbine generator set in which it is located, the overall response speed of the floating wind turbine buoy is fast, and the change of the displacement of the floating wind turbine buoy can adapt to the influence of different external factors, with a good stabilization effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0018] FIG1 is a schematic structural diagram of a wind turbine generator set according to an embodiment of the present application;

[0019] FIG2 is a schematic diagram of the degrees of freedom of movement of a wind turbine float according to an embodiment of the present application;

[0020] FIG3 is a schematic structural diagram of a wind turbine float according to an embodiment of the present application;

[0021] FIG4 is a schematic structural diagram of an auxiliary column according to an embodiment of the present application;

[0022] FIG5 is a cross-sectional view taken along the AA direction in FIG4 ;

[0023] FIG6 is a schematic structural diagram of an auxiliary column according to another embodiment of the present application;

[0024] FIG7 is a cross-sectional view taken along the BB direction in FIG6;

[0025] FIG8 is a hydraulic diagram of a floating wind turbine buoy according to an embodiment of the present application;

[0026] FIG9 is a flow chart of a control method according to an embodiment of the present application;

[0027] FIG10 is a control logic diagram of a control method according to an embodiment of the present application;

[0028] 11 to 14 are schematic diagrams of different incoming airflow directions according to an embodiment of the present application.

[0029] Among them: 100 - wind turbine body; 10 - tower; 20 - nacelle; 30 - generator; 40 - impeller; 41 - hub; 42 - blades; 50 - mooring system; 60 - seabed; 200 - floating wind turbine pontoon; 210 - auxiliary column; 210a - first auxiliary column; 210b - second auxiliary column; 210c - third auxiliary column; 211 - first static chamber; 212 - first medium; 213 - first dynamic chamber; 214 - first opening; 215 - first control valve; 216 - air pipe; 217 - compressor; 218 - second control valve; 219 - seawater; 220 - main column; 221 - flow meter; 222 - pressure gauge; 223 - filter; 230 - first connector; 240 - second connector; W - radial direction; Z - circumferential direction. DETAILED DESCRIPTION

[0030] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are set forth in order to provide a comprehensive understanding of the present application. However, it will be apparent to those skilled in the art that the present application can be implemented without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples of the present application. In the accompanying drawings and the following description, at least some of the well-known structures and technologies are not shown in order to avoid unnecessary ambiguity in the present application; and, for clarity, the sizes of some structures may be exaggerated. In addition, the features, structures, or characteristics described below may be combined in any suitable manner in one or more embodiments.

[0031] The directional words that appear in the following description refer to the directions shown in the figures and do not limit the specific structure of the floating wind turbine body, wind turbine generator set, and control method of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0032] As shown in Figure 1, an embodiment of the present application provides a wind turbine generator set comprising a floating wind turbine buoy 200 and a wind turbine body 100. The wind turbine body 100 comprises a tower 10, a nacelle 20, a generator 30, and an impeller 40. The tower 10 is connected to the floating wind turbine buoy, the nacelle 20 is located at the top of the tower 10, and the generator 30 is located within the nacelle 20. In some examples, the generator 30 may be located outside the nacelle 20, or in other examples, inside the nacelle 20. The impeller 40 comprises a hub 41 and a plurality of blades 42 connected to the hub 41. The impeller 40 is connected to the rotor of the generator 30 via the hub 41, thereby driving the rotor to rotate relative to the stator, thereby generating power for the wind turbine set. The floating wind turbine buoy floats in the seawater. To limit its range of motion, it is anchored to the seabed 60 via a mooring system 50, thereby constraining its range of motion.

[0033] Due to the huge differences between floating wind turbines and onshore wind turbines and offshore monopile-fixed wind turbines, floating wind turbines have their own unique floating body and mooring system in terms of the overall system composition.

[0034] As shown in Figure 2, in terms of external loads, the floating wind turbine body is subject to wind loads, wave loads, ocean current loads, ice loads, and other loads. In terms of overall dynamics, due to the floating nature of the floating wind turbine, the wind turbine body and the wind turbine it houses have six degrees of freedom in all directions. The three translational degrees of freedom include surge, sway, and heave, and the three rotational degrees of freedom include roll, pitch, and yaw. Under the influence of external random loads and the coupling of multiple systems in the unit, the motion characteristics and mechanisms of the floating wind turbine are further complex.

[0035] Continuing to refer to FIG2 , the motion stability of a floating wind turbine is one of the most important indicators for ensuring the continuous, stable, safe, and efficient output of the turbine and ensuring the power generation. However, while the impeller 40 captures wind energy to generate rotational mechanical energy, it also synchronously generates a thrust in the same direction as the incoming wind. This force is transmitted to the wind turbine float 200, causing the wind turbine to generate an elevation angle in the y rotation direction in FIG2 , resulting in an angle between the impeller of the wind turbine and the incoming wind direction. According to formula (1), the power generation P is proportional to A. The existence of the elevation angle will reduce A, thereby reducing the power generation of the turbine.

[0036] To improve the stability of floating wind turbines, a ballast control system for floating wind turbine platforms (i.e., wind turbine buoys) has been proposed. This system consists of multiple internal volume stabilizing struts for accommodating ballast (water) and a control system. The ballast loads on these struts are adjusted and controlled based on the incoming wind and the turbine's posture, ensuring the turbine's impellers face the wind directly, minimizing power loss. This allows for control of the floating wind turbine's posture, thereby optimizing the overall power generation.

[0037] However, during implementation and application, while this type of wind turbine buoyancy structure can improve the stability of floating wind turbines to a certain extent, the interconnection and adjustment of ballast water between the multiple internal volume stabilizing columns used to hold ballast (water) based on the incoming wind speed and the unit's posture requires a large number of supporting hardware such as pumps (several thousand cubic meters per hour), pipelines, and valves. This not only complicates the structure, but also places high demands on system reliability and redundancy. Failure of any component in the system will affect the performance and safety of the entire unit. Furthermore, from another perspective, the speed of ballast water adjustment between the different stabilizing columns achieved through pumps and piping is extremely slow, generally between half an hour and an hour. This system's response speed means that the unit cannot optimally match the incoming wind and wave loads in most scenarios.

[0038] As shown in Figures 3 to 5 , based on this, an embodiment of the present application provides a floating wind turbine buoy 200 that can be disposed in seawater 219 and used to support a tower 10. The floating wind turbine buoy 200 includes a main column 220, a first connector 230, and a plurality of auxiliary columns 210. The main column 220 is used to support the tower 10. The plurality of first connectors 230 are spaced apart in the circumferential direction Z of the main column 220 and are respectively connected to the main column 220. There are a plurality of auxiliary columns 210, which are spaced apart in the circumferential direction Z. Each first connector 230 is connected to an auxiliary column 210 at one end facing away from the main column 220. Among them, the auxiliary column 210 has an independently arranged first static chamber 211 and a first dynamic chamber 213. The first static chamber 211 is enclosed with a first medium 212. The auxiliary column 210 is provided with a first opening 214 and a first control valve 215 that are connected to the first dynamic chamber 213. The first control valve 215 controls the opening and closing of the first opening 214 to adjust the volume of seawater 219 entering the first dynamic chamber 213.

[0039] There is one main column 220, and there are multiple auxiliary columns 210. The multiple auxiliary columns 210 are spaced apart in the circumferential direction Z of the main column 220. The number of auxiliary columns 210 can be three, four, five, or even more. The center line connecting the centers of the auxiliary columns 210 can form a triangle, a quadrilateral, a pentagon, or other shape, optionally a regular polygon. The center of the main column 220 can be located within the shape formed by the center line connecting the auxiliary columns 210, or optionally at the center of the shape formed by the center line connecting the auxiliary columns 210.

[0040] Each auxiliary column 210 may be cylindrical in shape as a whole. In a direction perpendicular to the sea level, or in the extension direction of the tower 10 , the orthographic projection shape of the auxiliary column 210 may be a regular geometric shape.

[0041] Optionally, the orthographic projection of each auxiliary column 210 in a direction perpendicular to the sea level may be circular, elliptical, or polygonal. In the case of a polygon, a regular polygon may be selected. The shape and structure of the main column 220 may be the same as that of the main column 220, or may be different from that of the auxiliary column 210. The main column 220 may be provided in the static chamber and the dynamic chamber, or may not be provided with a static chamber and a dynamic chamber.

[0042] The sea level can be understood as the surface of the sea water 219 in a calm state without being affected by wind and waves.

[0043] The first connector 230 can be a connecting rod, connecting plate, or other structural form. Each auxiliary column 210 is connected to the main column 220 by a first connector 230. The first connector 230 can be connected to the main column 220 and the auxiliary column 210 using fasteners or an integrated structure. The extension lengths of each first connector 230 can be equal.

[0044] The number of the first dynamic chamber 213 and the first static chamber 211 included in each auxiliary column 210 can be set according to the adjustment requirements. For example, the number of the first dynamic chamber 213 and the first static chamber 211 included in each auxiliary column 210 can be equal, for example, each can be one, and of course, each can be two or more. In some embodiments, the number of the first dynamic chamber 213 and the first static chamber 211 included in each auxiliary column 210 can also be different, and one can be larger than the other, for example, it can include two first dynamic chambers 213 and one first static chamber 211, or it can include two first static chambers 211 and one first dynamic chamber 213. Of course, the above is only an example and is not limited to the above quantity settings.

[0045] The first medium 212 in the first static chamber 211 can be in a solid state or a liquid state. The first medium 212 is enclosed in the first static chamber 211 and its weight in the first static chamber 211 remains unchanged.

[0046] The first dynamic chamber 213 can be connected to the seawater 219 in the sea area through the first opening 214, so that the external seawater 219 can enter the first dynamic chamber 213 through the first opening 214, and can also flow out of the first dynamic chamber 213 from the first opening 214. The first control valve 215 can control the opening and closing of the first opening 214.

[0047] The floating wind turbine buoy 200 provided in this embodiment includes a main column 220, multiple auxiliary columns 210, and a first connector 230. The main column 220 is used to support the tower 10. The multiple auxiliary columns 210 are spaced apart in the circumferential direction Z of the main column 220 and are respectively connected to the main column 220 via the first connector 230 to ensure the integrity of the floating wind turbine buoy 200. Because the auxiliary column 210 has an independently provided first static chamber 211 and a first dynamic chamber 213, the first static chamber 211 encloses a first medium 212. The auxiliary column 210 is provided with a first opening 214 communicating with the first dynamic chamber 213 and a first control valve 215. When the displacement of any of the multiple auxiliary columns 210 needs to be adjusted, the first opening 214 can be directly controlled by the first control valve 215 to adjust the volume of seawater 219 in the first dynamic chamber 213 of the auxiliary column 210. This allows for rapid changes in the weight of a single auxiliary column 210 and the displacement of the entire floating wind turbine buoy 200, enabling rapid response to wind loads, wave loads, ocean current loads, ice loads, and other influences. While ensuring the overall stability of the floating wind turbine buoy 200 and the wind turbine generator system it houses, the floating wind turbine buoy 200 exhibits a rapid overall response speed, and changes in the displacement of the floating wind turbine buoy 200 can adapt to the influence of various external factors, resulting in excellent stability.

[0048] In addition, in the floating wind turbine buoy 200 provided in the embodiment of the present application, the first static chamber 211 and the first dynamic chamber 213 are independently arranged, and each first dynamic chamber 213 can be connected to the seawater 219. This design can realize the independent control of a single auxiliary column 210, and realize the overall posture adjustment of the floating wind turbine buoy 200 through the passive coordination of multiple auxiliary columns 210. There is no need to set connecting pipes, connecting valves, etc. between adjacent auxiliary columns 210, so that the overall structure of the floating wind turbine buoy 200 is simple and the cost is low, and the performance and safety of the entire wind turbine will not be affected by damage to any of the components. For example, when one of the auxiliary columns 210 fails for a short time, the safety of the entire machine can be ensured by adjusting the volume of seawater 219 in the first dynamic chamber 213 of other auxiliary columns 210 that are independently set.

[0049] In some optional embodiments, in the floating wind turbine buoy 200 provided in the embodiments of the present application, a plurality of auxiliary columns 210 are spaced and evenly arranged in the circumferential direction Z, and a second connector 240 is connected between two adjacent auxiliary columns 210 .

[0050] The plurality of auxiliary columns 210 are evenly arranged in the circumferential direction Z of the main column 220 , and the angles between two adjacent auxiliary columns 210 are equal.

[0051] The second connector 240 can be a connecting rod, connecting plate, or other structural form. In the circumferential direction Z, a second connector 240 is connected between each of two adjacent auxiliary columns 210. The second connector 240 and the auxiliary columns 210 can be connected using fasteners or an integrated structure. The extension lengths of the second connectors 240 can be equal.

[0052] The floating wind turbine buoy 200 provided in the embodiment of the present application can improve the overall strength of the floating wind turbine buoy 200 and enhance the load-bearing capacity of the floating wind turbine buoy 200 by providing the second connector 240 .

[0053] In some optional embodiments, in the floating wind turbine body 200 provided by the embodiments of the present application, one of the first static chamber 211 and the first dynamic chamber 213 is disposed around the other.

[0054] The first static chamber 211 can be annular and disposed around the first dynamic chamber 213. Alternatively, the first dynamic chamber 213 can be annular and disposed around the first static chamber 211. Both the first static chamber 211 and the first dynamic chamber 213 can be hollow annular. Alternatively, one can be hollow annular and the other hollow cylindrical.

[0055] The floating wind turbine buoy 200 provided in the embodiment of the present application is arranged so that the first dynamic chamber 213 and the first static chamber 211 are arranged one around the other. Therefore, when the volume of the seawater 219 in the first dynamic chamber 213 in the auxiliary column 210 is adjusted, the pressure of the seawater 219 is ensured to be uniform at all locations, thereby ensuring the response speed and stability requirements of the floating wind turbine buoy 200 during posture adjustment.

[0056] In some optional embodiments, in the floating wind turbine buoy 200 provided in the embodiments of the present application, one of the first dynamic chamber 213 and the first static chamber 211 is an annular chamber and the other is a cylindrical chamber, and the first dynamic chamber 213 and the first static chamber 211 are coaxially arranged with each other.

[0057] The first dynamic chamber 213 can be an annular chamber, and the first static chamber 211 can be a cylindrical chamber. Of course, the first dynamic chamber 213 can also be a cylindrical chamber, and the first static chamber 211 can be an annular chamber. For example, the first dynamic chamber 213 can be an annular chamber, and the first static chamber 211 can be a cylindrical chamber.

[0058] The floating wind turbine buoy 200 provided in the embodiment of the present application utilizes the internal cavity of the auxiliary column 210 by configuring one of the first dynamic chamber 213 and the first static chamber 211 as an annular chamber and the other as a cylindrical chamber, and arranging the two chambers coaxially. This effectively ensures that incoming seawater 219 circumferentially flows rapidly along the auxiliary column 210 in the Z direction, effectively ensuring uniform pressure from the seawater 219 on all parts of the auxiliary column 210, and ensuring that the floating wind turbine buoy 200 meets the required response speed and stability during attitude adjustment.

[0059] In some optional embodiments, in the floating wind turbine buoy 200 provided in the embodiments of the present application, the auxiliary columns 210 are hollow cylindrical as a whole, and the first dynamic chambers 213 and the first static chambers 211 are alternately arranged in the radial direction W of the auxiliary columns 210 .

[0060] The first static chamber 211 can be located in the center area of ​​the auxiliary column 210, and then the first dynamic chamber 213 is arranged around the first static chamber 211. Of course, it can also be arranged in the opposite direction, so that the first dynamic chamber 213 is located in the center of the auxiliary column 210, and then the first static chamber 211 is arranged around the first dynamic chamber 213.

[0061] The floating wind turbine buoy 200 provided in the embodiment of the present application, through the above-mentioned configuration, can have more than two first dynamic chambers 213. On the basis of auxiliary columns 210 of the same size, the cavity inside the auxiliary columns 210 can be divided more finely, and the volume of seawater 219 in each first dynamic chamber 213 in the same auxiliary column 210 can be individually controlled, which can further improve the response speed of the floating wind turbine buoy 200 during attitude adjustment.

[0062] In some optional embodiments, in the floating wind turbine buoy 200 provided in the embodiment of the present application, the alternating distribution of the first dynamic chamber 213 and the first static chamber 211 in the radial direction W is only an optional implementation.

[0063] As shown in FIG. 6 and FIG. 7 , in some embodiments, the number of the first dynamic chambers 213 may be more than two, and the two or more first dynamic chambers 213 are all disposed around the first static chamber 211 and are distributed independently of each other.

[0064] For example, the first static chamber 211 can be in the shape of a hollow column and located at the center of the auxiliary column 210, and two or more first dynamic chambers 213 are distributed in sequence along the radial direction W of the auxiliary column 210 and are independently arranged from each other, and each first dynamic chamber 213 is provided with a first opening 214 and a first control valve 215.

[0065] The floating wind turbine buoy 200 provided in the embodiment of the present application can increase the proportion of the first dynamic chambers 213 by making the number of the first dynamic chambers 213 more than two, and the first dynamic chambers 213 are set independently of each other, which can also divide the cavity inside the auxiliary column 210 more finely. The volume of seawater 219 in each first dynamic chamber 213 in the same auxiliary column 210 can be individually adjusted, which can further improve the response speed of the floating wind turbine buoy 200 during posture adjustment.

[0066] Furthermore, the two or more embodiments proposed in this patent application utilize a logic that uses a holistic approach to break the whole into multiple parts, thereby enhancing the dynamic characteristics of the entire system. Furthermore, because the mass required for attitude adjustment is limited, the patent incorporates a first static chamber 211 to ensure the system's basic hydrodynamic characteristics. Simultaneously, the provision of a first dynamic chamber 213, through the separation of dynamic and static functions, maximizes the dynamic characteristics of the medium within the first dynamic chamber 213, ensuring the corresponding speed of the floating wind turbine body 200 during attitude adjustment.

[0067] In some optional embodiments, in the floating wind turbine buoy 200 provided by the embodiments of the present application, the first medium 212 includes at least one of a solid medium and a liquid medium.

[0068] The first medium 212 may include only solid medium, or may include only liquid medium. In some examples, it may include both solid medium and liquid medium.

[0069] Solid media include but are not limited to iron ore, stone, etc. Liquid media include but are not limited to seawater 219, fresh water, etc.

[0070] The floating wind turbine buoy 200 provided in the embodiment of the present application can ensure the support requirements of the floating wind turbine buoy 200 for components such as the tower 10 by making the first medium 212 include one of a solid medium and a liquid medium. In addition, the above-mentioned arrangement can also make the material selection range of the first medium 212 wide, and when a solid medium is used, it can also reduce the corrosion protection requirements of the first static chamber 211.

[0071] In the floating wind turbine buoy 200 provided in the embodiment of the present application, after the first control valve 215 of each auxiliary column 210 is opened, seawater 219 can be drawn into the first dynamic chamber 213 through the first opening 214 by gravity. Alternatively, seawater 219 can be discharged from the first opening 214 by an external drive device such as a pump or hydraulic motor. This is only one implementation method and is not limited to the above.

[0072] As shown in Figures 4 to 8, in some optional embodiments, the floating wind turbine buoy 200 provided in the embodiments of the present application may further include a compressor 217 and an air pipe 216 connected to the compressor 217, and the first dynamic chamber 213 of the auxiliary column 210 is connected to the air pipe 216.

[0073] When the corresponding auxiliary column 210 needs to sink, the volume or weight of the seawater 219 in the first dynamic chamber 213 needs to be increased to achieve this. At this time, the first control valve 215 can be opened, so that the first opening 214 is open, allowing seawater 219 to enter through the first opening 214, and the gas in the first dynamic chamber 213 can enter the air pipe 216 through the opening connecting the first dynamic chamber 213 to the air pipe 216. Optionally, when the first control valve 215 controls the opening of the first opening 214, the flow rate of seawater 219 entering the first dynamic chamber 213 can be controlled by varying the opening degree. After the first dynamic chamber 213 is adjusted to the target water level, the water level in the first dynamic chamber 213 can be maintained at the target position, and the first control valve 215 can be closed.

[0074] When the corresponding auxiliary column 210 needs to float, the compressor 217 is started, allowing the high-pressure gas compressed by the compressor 217 to enter the first dynamic chamber 213 through the air pipe 216. After the accumulated air pressure in the first dynamic chamber 213 reaches a predetermined value, the first control valve 215 is opened. Since the pressure in the first dynamic chamber 213 is greater than the pressure outside the auxiliary column 210, under the action of the air pressure difference, the seawater 219 in the first dynamic chamber 213 will flow out of the first dynamic chamber 213 through the first opening 214 and into the sea. When the volume or weight of the remaining seawater 219 in the first dynamic chamber 213 reaches a predetermined requirement, the first control valve 215 is controlled to close the first opening 214.

[0075] The floating wind turbine buoy 200 provided in the embodiment of the present application is provided with a compressor 217 and an air pipe 216, so that the floating wind turbine buoy 200 itself can reliably discharge the seawater 219 in the first dynamic chamber 213 by utilizing the principle of air pressure difference, thereby effectively ensuring the response speed when the floating wind turbine buoy 200 adjusts its posture.

[0076] In addition, the present application constructs a dynamic ballast system based on an open circulation system, and combines the compressor 217 to provide a high-pressure air source to adjust the position of the auxiliary column 210 of the floating wind turbine float 200. Through easy-to-obtain implementation means and methods, a low-cost attitude adjustment system is constructed, thereby reducing the weight of the float and reducing the electricity cost of the entire machine.

[0077] In some optional embodiments, the floating wind turbine buoy 200 provided in the embodiments of the present application is provided with a second control valve 218 between each first dynamic chamber 213 and the compressor 217 to regulate the flow of gas entering each first dynamic chamber 213. The provision of the second control valve 218 facilitates the control of other flows entering each first dynamic chamber 213, thereby ensuring the accuracy and stability of the attitude adjustment of the floating wind turbine buoy 200.

[0078] In some optional embodiments, the floating wind turbine buoy 200 provided in the embodiments of the present application can have a compressor 217 connected to the auxiliary column 210, or alternatively, to the main column 220. A compressor 217 can be provided for each auxiliary column 210, and each first dynamic chamber 213 of the same auxiliary column 210 can be connected to the same compressor 217. The flow rate of compressed gas supplied to each first dynamic chamber 213 by the compressor 217 can be controlled by a second control valve 218 provided for each first dynamic chamber 213.

[0079] As shown in Figure 8, this is, of course, an optional approach. In some embodiments, each auxiliary column 210 can share a single compressor 217, where the compressed air source for compressor 217 can be directly drawn from the outside atmosphere. To ensure the quality of the circulating system's air source, an air filter 223 can be installed at the inlet of compressor 217. The system's air is first pressurized by compressor 217, then flows through an outlet air valve, where it is monitored and feedbacked by a flow meter 221 and a pressure gauge 222. Subsequently, the air is supplied to each branch as needed based on the positional requirements of the floating wind turbine buoy 200. The required flow rate of high-pressure gas within the first dynamic chamber 213 of each auxiliary column 210 is distributed and regulated by controlling the opening, closing, and opening degree of the second control valve 218 corresponding to each auxiliary column 210. The flow rate of the high-pressure air source in each branch can be monitored and feedback-controlled using flow meters 221 installed in each branch.

[0080] In some optional embodiments, in the floating wind turbine buoy 200 provided in the embodiments of the present application, the auxiliary column 210 can be a cylindrical structure, and the first opening 214 can be set on the bottom wall of the auxiliary column 210 that contacts the seawater 219 in its own axial direction, which is conducive to the entry and discharge of seawater 219 and ensures the posture adjustment requirements.

[0081] Optionally, the number of first openings 214 included in each auxiliary column 210 can be one, or of course, can be more than two. When there are more than two, the two or more first openings 214 are spaced and evenly arranged on the periphery of the auxiliary column 210, and a first control valve 215 can be provided in each first opening 214.

[0082] In some optional embodiments, the floating wind turbine buoy 200 provided in the embodiments of the present application further includes a tilt sensor (not shown), which is arranged on at least one of the main column 220 and the auxiliary column 210. The tilt sensor is configured to obtain the tilt angle of the whole formed by each auxiliary column 210, the first connector 230 and the main column 220 relative to the reference plane.

[0083] The inclination sensor may be provided on the auxiliary column 210 , or may be provided on the main column 220 .

[0084] The reference plane may be a horizontal plane, or a preset plane that is at a certain angle to the horizontal plane.

[0085] The floating wind turbine body 200 provided in the embodiment of the present application is capable of detecting the inclination angle of the whole formed by each auxiliary column 210, the first connector 230 and the main column 220 relative to the reference plane by providing an inclination sensor. This is beneficial for determining the auxiliary column 210 that needs to be adjusted and the adjustment method based on the inclination angle and the direction of the incoming wind flow, thereby facilitating the posture adjustment of the floating wind turbine body 200.

[0086] Continuing with Figures 4 to 8 , in some optional embodiments, the floating wind turbine buoy 200 provided in the embodiments of the present application can have a main column 220 and an auxiliary column 210 having the same structure, that is, the main column 220 can also include a first static chamber 211 and a first dynamic chamber 213, wherein a first medium 212 is enclosed in the first static chamber 211, and the auxiliary column 210 is provided with a first opening 214 communicating with the first dynamic chamber 213 and a first control valve 215, wherein the first control valve 215 controls the opening and closing of the first opening 214 to adjust the volume of seawater 219 entering the first dynamic chamber 213.

[0087] Through the above-mentioned arrangement, the main column 220 also has the function of adjusting the displacement. The first opening 214 can be directly controlled to open through the first control valve 215 of the main column 220 to adjust the volume of seawater 219 in the dynamic chamber of the main column 220. It can cooperate with the auxiliary column 210 to quickly respond to the influence of wind load, wave load, ocean current load, ice load, etc. On the basis of ensuring the overall stability of the floating wind turbine buoy 200 and the wind turbine generator set in which it is located, the overall response speed of the floating wind turbine buoy 200 is fast and the stability effect is optimized.

[0088] The wind turbine generator set provided in the embodiment of the present application includes the floating wind turbine buoy 200 provided in the above embodiments, which can ensure the support requirements for the wind turbine body 100. At the same time, since the auxiliary column 210 has an independently set first static chamber 211 and a first dynamic chamber 213, the first static chamber 211 is enclosed with a first medium 212, and the auxiliary column 210 is provided with a first opening 214 and a first control valve 215 that are connected to the first dynamic chamber 213, when it is necessary to adjust the drainage volume of any auxiliary column 210 among the multiple auxiliary columns 210, it can be directly By controlling the opening of the first opening 214 through the first control valve 215 and adjusting the volume of seawater 219 in the dynamic chamber of the auxiliary column 210, the weight of a single auxiliary column 210 and the displacement of the entire floating wind turbine buoy 200 can be quickly changed to quickly respond to the influences of wind loads, wave loads, ocean current loads, ice loads, etc. On the basis of ensuring the overall stability of the floating wind turbine buoy 200 and the wind turbine generator set in which it is located, the overall response speed of the floating wind turbine buoy 200 is fast, and the change in the displacement of the floating wind turbine buoy 200 can adapt to the influence of different external factors, thereby achieving a good stabilization effect.

[0089] As shown in FIG9 and FIG10 , on the other hand, an embodiment of the present application further provides a control method for a wind turbine generator set, which can be used for the wind turbine generator sets provided in the above embodiments. The control method includes:

[0090] S100: Obtain current power information P of the wind turbine generator set.

[0091] S200 : If the current power information continuously exceeds the first threshold m within a preset time period t, obtain the tilt angle information of the floating wind turbine body 200 .

[0092] S300: When the tilt angle information exceeds a preset range, a target auxiliary column that needs to be adjusted is determined based on the tilt angle information, the direction of the incoming wind, and target posture information corresponding to the target posture to be adjusted.

[0093] S400 , adjusting the volume of the seawater 219 in the target auxiliary column until the floating wind turbine body 200 reaches the target posture.

[0094] In step S100 , the current power information of the wind turbine generator set may be directly obtained through its master controller, or may be obtained by calculation based on its current rotation speed.

[0095] In step S200, the preset time and the first threshold value can be set according to the area where the wind turbine is located and the safety level requirements. For example, the value t of the preset time period can be b=20min, and the first threshold value m can be 3000kw. Of course, the above is only an example given based on a model and safety level requirements, and is not limited to the above form.

[0096] In step S300, the posture of the offshore wind turbine generator set is closely related to the incoming wind and waves. The incoming wind is taken as an example to describe the different states of the wind turbine impeller. Combined with the shape of the floating wind turbine body and the state of the unit's impeller, the motion posture of the impeller can be defined as four directions. Different directions determine the direction of the thrust and are strongly related to the posture of the floating wind turbine body 200. Therefore, the target auxiliary column that needs to be adjusted can be determined based on the direction of the incoming wind, the direction of the incoming wind, and the target posture information when it is adjusted to the target posture. The number of target auxiliary columns can be one, two, three or even more, and the target posture can be a horizontal posture or a posture in a predetermined angle with the horizontal posture.

[0097] For example, the current state of the floating wind turbine generator set can be first obtained through the unit information, such as mooring tension, gravity, floating body bending moment, and center of buoyancy information. Based on this input, theoretical calculation can be performed to obtain the target attitude information, that is, the corresponding center of gravity position and center of buoyancy position. The adjustment of the two centers can be achieved through the motion system of a single auxiliary column 210 or multiple auxiliary columns 210, and the input to be implemented needs to be combined with the impeller orientation state.

[0098] In step S400, adjusting the volume of the seawater 219 in the target auxiliary column may be done by increasing the volume of the seawater 219 in the target auxiliary column, or by reducing the volume of the seawater 219 in the target auxiliary column, as long as the wind turbine float can reach the target posture.

[0099] The control method of the wind turbine generator set provided in the embodiment of the present application is set through the above steps, so that the wind turbine generator set maintains the optimal output posture of the set when dealing with complex and uncertain external loads and different operating conditions of the wind turbine generator set, thereby ensuring the output of the wind turbine generator set.

[0100] The control method of the wind turbine generator set provided in the embodiment of the present application is that the wind turbine body 100 is connected to its main column 220. Through the above-mentioned steps, the posture of the floating wind turbine float 200 can be adjusted by adjusting the volume of seawater 219 in the first dynamic chamber 213 corresponding to the auxiliary column 210, so that the wind turbine generator set maintains the optimal output posture of the set when dealing with complex and uncertain external loads and its own different operating conditions, thereby ensuring the output of the wind turbine generator set.

[0101] In some optional embodiments, the control method provided by the embodiments of the present application, the tilt angle information includes a tilt angle θ of the floating wind turbine body 200 relative to a preset reference plane;

[0102] When the tilt angle information exceeds a preset range, the step of determining the target auxiliary column that needs to be adjusted according to the tilt angle information, the direction of the incoming wind, and the target posture information corresponding to the target posture to be adjusted includes:

[0103] When the inclination angle of the floating wind turbine body 200 relative to the preset reference plane is greater than the second threshold value c, and the angle a between the incoming wind and the reference wind direction is in the range of 0°<a<360°, at least two auxiliary columns 210 among the multiple auxiliary columns 210 are determined to be the target auxiliary columns to be adjusted.

[0104] When the inclination angle of the floating wind turbine body 200 relative to the preset reference plane is greater than the second threshold value c, and the angle a between the incoming wind and the reference wind direction is 360°, the auxiliary column 210 among the multiple auxiliary columns 210 whose extension direction of the center line of the main column 220 is parallel to the incoming wind direction is determined as the target auxiliary column.

[0105] The control method provided in the embodiment of the present application can determine the target auxiliary column according to the value of the angle a between the incoming wind and the reference wind direction through the above-mentioned setting, which is conducive to the determination of the target auxiliary column and ensures that the floating wind turbine float 200 is adjusted according to the incoming wind and the target posture.

[0106] As shown in Figures 11 to 14, in some optional embodiments, the control method provided in the embodiments of the present application, the floating wind turbine buoy 200 includes three auxiliary columns 210, namely a first auxiliary column 210a, a second auxiliary column 210b and a third auxiliary column 210c. The angle between the center line of the first auxiliary column 210a and the main column 220 and the reference wind direction Y is 60°, the angle between the center line of the second auxiliary column 210b and the main column 220 and the reference wind direction is 300°, and the angle between the center line of the third auxiliary column 210c and the main column 220 and the reference wind direction is 180°.

[0107] When the inclination angle of the floating wind turbine body 200 relative to the preset reference plane is greater than a second threshold value c, and the angle a between the incoming wind X and the reference wind direction Y is in the range of 0°<a<360°, the step of determining at least two of the plurality of auxiliary columns 210 as target auxiliary columns to be adjusted includes:

[0108] When the inclination angle of the floating wind turbine body 200 relative to the preset reference plane is greater than the second threshold value c, and the angle a between the incoming wind X and the reference wind direction Y is in the range of 0°<a≤90°, the first auxiliary column 210a and the third auxiliary column 210c are determined as the target auxiliary columns to be adjusted.

[0109] When the inclination angle of the floating wind turbine body 200 relative to the preset reference plane is greater than the second threshold value c, and the angle between the incoming wind X and the reference wind direction Y is in the range of 90°<a≤180°, the first auxiliary column 210a and the second auxiliary column 210b are determined as the target auxiliary columns to be adjusted.

[0110] When the inclination angle of the floating wind turbine body 200 relative to the preset reference plane is greater than the second threshold value, and the angle between the incoming wind and the reference wind direction is in the range of 180°<a<360°, the second auxiliary column 210b and the third auxiliary column 210c are determined as the target auxiliary columns to be adjusted.

[0111] For example, taking three auxiliary columns 210 as an example, the reference wind direction Y is the vertically upward direction in the figure.

[0112] As shown in FIG11 , when the angle a between the incoming wind X and the reference wind direction Y is 90°, the first auxiliary column 210a and the third auxiliary column 210c need to be adjusted to complete the movement. The second control valve 218 connected to the air pipe 216 at the top of the first auxiliary column 210a and the second control valve 218 connected to the air pipe 216 at the top of the third auxiliary column 210c are opened. Then, the first control valve 215 of the first auxiliary column 210a and the third auxiliary column 210c are opened in sequence to allow seawater 219 to enter the first auxiliary column 210a and the third auxiliary column 210c. This is done until the floating wind turbine buoy 200 as a whole reaches a target posture, such as a leveled posture, or the tilt angle information of the floating wind turbine buoy 200 is adjusted to a preset range. Then, the first control valve 215 corresponding to each auxiliary column 210 can be closed.

[0113] As shown in FIG12 , when the angle a between the incoming wind X and the reference wind direction Y is 180°, the first auxiliary column 210a and the second auxiliary column 210b need to be adjusted to open the second control valve 218 connected to the air pipe 216 at the top of the first auxiliary column 210a and the second control valve 218 connected to the air pipe 216 at the top of the second auxiliary column 210b. Then, the first control valve 215 of the first auxiliary column 210a and the first control valve 215 of the second auxiliary column 210b are opened in sequence to allow seawater 219 to enter the first auxiliary column 210a and the second auxiliary column 210b. This is done until the floating wind turbine body 200 as a whole reaches a target posture, such as a leveled posture, or the tilt angle information of the floating wind turbine body 200 is adjusted to a preset range. Then, the first control valve 215 corresponding to each auxiliary column 210 can be closed.

[0114] As shown in FIG13 , when the angle a between the incoming wind X and the reference wind direction Y is 270°, the second auxiliary column 210 b and the third auxiliary column 210 c need to be adjusted to complete the movement. The second control valve 218 connected to the air pipe 216 at the top of the second auxiliary column 210 b and the second control valve 218 connected to the air pipe 216 at the top of the third auxiliary column 210 c are opened. Then, the first control valve 215 of the second auxiliary column 210 b and the first control valve 215 of the third auxiliary column 210 c are opened in sequence to allow seawater 219 to enter the second auxiliary column 210 b and the third auxiliary column 210 c. This is done until the floating wind turbine body 200 as a whole reaches a target posture, such as a leveled posture, or the tilt angle information of the floating wind turbine body 200 is adjusted to a preset range. Then, the first control valve 215 corresponding to each auxiliary column 210 can be closed.

[0115] As shown in FIG14 , when the angle a between the incoming wind X and the reference wind direction Y is 360°, this needs to be accomplished by adjusting the movement of the third auxiliary column 210 c. The second control valve 218 connected to the air pipe 216 at the top of the third auxiliary column 210 c is opened, and then the first control valves 215 of the third auxiliary column 210 c are opened in sequence to allow seawater 219 to enter the third auxiliary column 210 c. This is done until the floating wind turbine body 200 as a whole reaches a target posture, such as a leveling posture, or the tilt angle information of the floating wind turbine body 200 is adjusted to a preset range. Then, the first control valves 215 corresponding to each auxiliary column 210 can be closed.

[0116] The above four postures are all examples and are not limited to the above methods. They are intended to resist incoming wind and reduce the probability of longitudinal swing, transverse swing, vertical swing, roll, longitudinal and yaw swing.

[0117] The control method provided in the embodiment of the present application, through the above-mentioned arrangement, enables the number of auxiliary columns 210 to be three and to be spaced apart in the circumferential direction Z of the main column 220, and the target floating body can be accurately determined based on the value of the angle a between the incoming wind X and the reference wind direction Y. By adjusting the volume of the target floating body, the floating wind turbine body 200 can always be close to the horizontal posture or the target posture, thereby enabling the wind turbine generator set to capture wind energy at the optimal wind angle as much as possible under different operating conditions.

[0118] It can be understood that the above embodiments of the present application give specific examples of a=90°, a=180°, a=270° and a=360°. When a is between any two of the above nodes, posture adjustment can also be achieved through the corresponding column operation response combination in the two states.

[0119] In some optional embodiments, the control method provided in the embodiments of the present application adjusts the volume of seawater 219 in the target floating body, including: pressing seawater 219 into the target floating body through the first opening 214 and discharging seawater 219 into the sea area to adjust the overall displacement of the wind turbine float.

[0120] Through the above arrangement, the overall displacement of the floating wind turbine body 200 can be changed to adapt to the incoming wind, which is beneficial to the adjustment of the posture of the wind turbine body.

[0121] In some optional embodiments, according to another aspect of the embodiments of the present application, after the step of adjusting the volume of the seawater 219 in the target floating body until the floating wind turbine body 200 reaches the target posture, the control method further includes:

[0122] Get the current power information of the wind turbine;

[0123] If the current power information is continuously less than the first threshold value during the pre-judgment period, the volume of the seawater 219 in the target auxiliary column is adjusted to return to the initial state.

[0124] The initial state may be understood as a state before the tilt angle information exceeds a preset range, that is, a state when the volume of the seawater 219 is not added or reduced in the first dynamic chamber 213 of the auxiliary column 210 .

[0125] For example, when the angle a between the incoming wind X and the reference wind direction Y is 90°, to restore the initial state, the second control valve 218 at the top of the first auxiliary column 210a and the third auxiliary column 210c must first be closed. A high-pressure gas source can then be introduced into the first dynamic chamber 213 of the first auxiliary column 210a and the third auxiliary column 210c. When the pressure approaches the input high-pressure gas source pressure, the first control valves 215 of the first auxiliary column 210a and the third auxiliary column 210c are sequentially opened until the first auxiliary column 210a and the third auxiliary column 210c return to the designed waterline position, thereby allowing the unit to enter the reset state. For the structural forms shown in Figures 12 to 14, the adjustment method is the same as above. That is, when the current power information is continuously less than the first threshold value during the pre-trial period, the seawater 219 previously added to the target floating body is discharged to restore the initial state, so that the wind turbine generator set always maintains a relatively optimal power generation state.

[0126] Through the above arrangement, when the incoming wind changes direction or the intensity of the incoming wind decreases, the floating wind turbine body 200 will not be tilted due to the increased seawater 219, thereby ensuring the power generation efficiency of the wind turbine generator set.

[0127] It is understandable that the above-mentioned methods of restoring the initial state are only some optional embodiments and are not limited to the above-mentioned methods. In some embodiments, when the main column 220 and the auxiliary column 210 have the same structure, the control method further includes: obtaining current power information of the wind turbine generator set;

[0128] If the current power information remains below the first threshold value during the pre-judgment period, the volume of seawater 219 within the target auxiliary column and the volume of seawater 219 within the main column 220 are adjusted to restore the floating wind turbine body 200 to its initial state. In other words, the main column 220 and the auxiliary columns 210 can cooperate to achieve reset.

[0129] For example, when the angle a between the incoming wind X and the reference wind direction Y is 90°, when restoring the initial state, it is necessary to close the second control valve 218 at the top of the first auxiliary column 210a, the third auxiliary column 210c and the main column 220, and then introduce a high-pressure gas source into the first dynamic chamber 213 of the first auxiliary column 210a, the third auxiliary column 210c and the main column 220. When the pressure value is close to the input high-pressure gas source pressure, the first control valve 215 of the first auxiliary column 210a, the third auxiliary column 210c and the main column 220 is opened in sequence until the first auxiliary column 210a, the third auxiliary column 210c and the main column 220 return to the designed water surface line position, thereby allowing the unit to enter the reset state. 12 to 14 in the accompanying drawings, the adjustment method is the same as above, that is, when the current power information is continuously less than the first threshold value during the pre-trial time period, the seawater 219 previously added to the target floating body is discharged to restore it to its initial state, so that the wind turbine generator set always maintains a better power generation state. For details, please refer to the combination of mode 1 and mode 2 corresponding to the wind flow in different directions in FIG10.

[0130] It can be understood that the above-mentioned embodiments of the present application are all illustrated by taking the number of auxiliary columns 210 as three. This is only for the purpose of better understanding the examples given in the present application. In some embodiments, the number of auxiliary columns 210 can be four or five, and the lines connecting their centers are quadrilaterals or pentagons. The target floating body can also be determined according to the direction of the incoming wind, the current attitude information and the target attitude information that needs to be adjusted. Taking four as an example, according to different incoming wind directions, at least two of the auxiliary columns 210 can be determined as target floating bodies to resist the tipping of the wind turbine generator set in the direction of the incoming wind, so as to reduce the probability of longitudinal swing, transverse swing, vertical swing, roll, pitch swing, yaw swing and other phenomena, so that the wind turbine float can reach the target attitude, such as the leveling attitude, or the inclination angle information of the wind turbine float is adjusted to a preset range. This application will not list them one by one.

[0131] In some optional embodiments, the wind turbine generator set provided in the embodiments of the present application may further include a controller, which is configured to: obtain current power information of the wind turbine generator set; if the current power information continues to exceed a first threshold value within a preset time period, obtain the inclination angle information of the floating wind turbine buoy 200; when the inclination angle information exceeds a preset range, determine the target auxiliary column that needs to be adjusted based on the inclination angle information, the direction of the incoming wind, and the target attitude information when it is adjusted to the target attitude; adjust the volume of seawater 219 in the target auxiliary column until the floating wind turbine buoy 200 reaches the target attitude.

[0132] Optionally, the controller may be configured to execute the steps corresponding to the control methods provided in the above embodiments, which will not be described in detail here.

[0133] The controller of the wind turbine generator set provided in the embodiment of the present application may be a separately provided control cabinet, or may be integrated into the master control of the wind turbine generator set.

[0134] The wind turbine generator set provided in the embodiment of the present application can be used to execute the control methods provided in the above-mentioned embodiments by setting a controller, which is beneficial to the control of the floating wind turbine float 200, so that it can adjust the volume of seawater 219 in the dynamic chamber of the corresponding float according to the incoming wind, current posture and target posture, thereby ensuring the overall power generation efficiency of the wind turbine generator set.

[0135] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A floating wind turbine buoy, which can be arranged in seawater and used to support a tower, the floating wind turbine buoy comprising: A main column, used to support the tower; A first connector, a plurality of which are arranged at intervals in the circumferential direction of the main column and are respectively connected to the main column; Auxiliary columns, the number of the auxiliary columns is plural and the auxiliary columns are spaced apart in the circumferential direction, and one end of each of the first connectors away from the main column is connected to the auxiliary column; The auxiliary column has an independently arranged first static chamber and a first dynamic chamber, a first medium is enclosed in the first static chamber, and the auxiliary column is provided with a first opening connected to the first dynamic chamber and a first control valve, and the first control valve controls the opening and closing of the first opening to adjust the volume of the seawater entering the first dynamic chamber.

2. The floating wind turbine buoy according to claim 1, wherein: The plurality of auxiliary columns are spaced and evenly arranged in the circumferential direction, and a second connector is connected between two adjacent auxiliary columns.

3. The floating wind turbine buoy according to claim 1 or 2, wherein: One of the first static chamber and the first dynamic chamber is disposed around the other.

4. The floating wind turbine buoy according to claim 3, wherein: One of the first dynamic chamber and the first static chamber is an annular chamber and the other is a cylindrical chamber, and the first dynamic chamber and the first static chamber are coaxially arranged with each other.

5. The floating wind turbine buoy according to any one of claims 1 to 4, wherein: The auxiliary column is in the shape of a hollow column as a whole, and the first dynamic chamber and the first static chamber are alternately arranged in the radial direction of the auxiliary column itself.

6. The floating wind turbine buoy according to claim 5, wherein: The number of the first dynamic chambers is more than two, and the more than two first dynamic chambers are arranged around the first static chamber and are distributed independently of each other.

7. The floating wind turbine buoy according to any one of claims 1 to 6, wherein: The first medium includes at least one of a solid medium and a liquid medium.

8. The floating wind turbine buoy according to any one of claims 1 to 7, wherein: The floating wind turbine buoy also includes a compressor and an air pipe connected to the compressor, and the first dynamic chamber of the auxiliary column is connected to the air pipe.

9. The floating wind turbine buoy according to claim 8, wherein: A second control valve is provided between each of the first dynamic chambers and the compressor to adjust the flow rate of the gas entering each of the first dynamic chambers.

10. The floating wind turbine body according to any one of claims 1 to 9, wherein: The floating wind turbine buoy also includes an inclination sensor, which is arranged on at least one of the main column and the auxiliary column, and is configured to obtain the inclination angle of the whole formed by each auxiliary column, the first connector and the main column relative to a reference plane.

11. The floating wind turbine body according to any one of claims 1 to 10, wherein: The main column and the auxiliary column have the same structure.

12. A wind turbine generator set, comprising: The floating wind turbine buoy according to any one of claims 1 to 11; The fan body is arranged on the main column, and the fan body comprises a tower connected to the main column, a cabin arranged on the tower, and an impeller arranged on the cabin.

13. The wind turbine generator set according to claim 12, wherein: It also includes a controller, which is configured to obtain current power information of the wind turbine generator set; if the current power information continues to exceed a first threshold value within a preset time period, the inclination angle information of the floating wind turbine buoy is obtained; when the inclination angle information exceeds a preset range, the target auxiliary column that needs to be adjusted is determined according to the inclination angle information, the direction of the incoming wind, and the target attitude information when the attitude is to be adjusted to the target attitude; the volume of seawater in the target auxiliary column is adjusted until the floating wind turbine buoy is at the target attitude.

14. A control method for a wind turbine generator set as claimed in claim 12, comprising: Get the current power information of the wind turbine generator set; If the current power information continues to exceed the first threshold value within a preset time period, the tilt angle information of the floating wind turbine buoy is obtained; When the tilt angle information exceeds a preset range, the tilt angle information is used to determine the tilt angle. The direction of the wind flow and the target posture information corresponding to the target posture to be adjusted determine the target auxiliary column that needs to be adjusted; The volume of seawater in the target auxiliary column is adjusted until the floating wind turbine body reaches the target posture.

15. The control method according to claim 14, wherein: The tilt angle information includes the tilt angle of the floating wind turbine body relative to a preset reference surface; When the tilt angle information exceeds a preset range, the step of determining the target auxiliary column to be adjusted according to the tilt angle information, the direction of the incoming wind flow, and the target posture information corresponding to the target posture to be adjusted includes: When the inclination angle of the floating wind turbine body relative to the preset reference plane is greater than a second threshold value, and the value range of the angle a between the incoming wind and the reference wind direction is 0°<a<360°, at least two of the plurality of auxiliary columns are determined to be the target auxiliary columns to be adjusted; When the inclination angle of the floating wind turbine body relative to the preset reference plane is greater than a second threshold value, and the angle a between the incoming wind and the reference wind direction is 360°, the auxiliary column among the multiple auxiliary columns whose extension direction of the center line of the main column is parallel to the incoming wind direction is determined as the target auxiliary column.

16. The control method according to claim 15, wherein: The floating wind turbine buoy includes three auxiliary columns, namely, a first auxiliary column, a second auxiliary column, and a third auxiliary column. The angle between the center line of the first auxiliary column and the main column and the reference wind direction is 60°, the angle between the center line of the second auxiliary column and the main column and the reference wind direction is 300°, and the angle between the center line of the third auxiliary column and the main column and the reference wind direction is 180°. When the inclination angle of the floating wind turbine body relative to the preset reference plane is greater than a second threshold value, and the value range of the angle a between the incoming wind and the reference wind direction is 0°<a<360°, the step of determining at least two of the plurality of auxiliary columns as the target auxiliary columns to be adjusted includes: When the inclination angle of the floating wind turbine body relative to the preset reference plane is greater than a second threshold value, and the value range of the angle a between the incoming wind and the reference wind direction is 0°<a≤90°, the first auxiliary column and the third auxiliary column are determined as the target auxiliary columns to be adjusted: When the inclination angle of the floating wind turbine body relative to the preset reference plane is greater than a second threshold value, and the angle between the incoming wind and the reference wind direction is in the range of 90°<a≤180°, the first auxiliary column and the second auxiliary column are determined as the target auxiliary columns to be adjusted; When the inclination angle of the floating wind turbine buoy relative to the preset reference plane is greater than a second threshold, and the angle between the incoming wind and the reference wind direction is in the range of 180°<a<360°, the second auxiliary column and the third auxiliary column are determined as the target auxiliary columns to be adjusted.

17. The control method according to claim 14, wherein: The step of adjusting the volume of seawater in the target auxiliary column comprises: The seawater is pressed into the target auxiliary column through the first opening and discharged into the sea area to adjust the overall displacement of the floating wind turbine buoy.

18. The control method according to claim 14, wherein: After the step of adjusting the volume of seawater in the target floating body until the floating wind turbine body reaches the target posture, the control method further includes: Get the current power information of the wind turbine generator set; If the current power information is continuously less than the first threshold value during the pre-trial period, the volume of the seawater in the target auxiliary column is adjusted to return to the initial state; Alternatively, the main column and the auxiliary column have the same structure, and the control method further comprises: acquiring current power information of the wind turbine generator set; If the current power information is continuously less than the first threshold value during the pre-examination time period, the volume of seawater in the target auxiliary column and the volume of seawater in the main column are adjusted to restore the floating wind turbine buoy to an initial state.

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