Wind turbine foundation, wind generating set, and control method

Abstract

A wind turbine foundation, comprising: a floating body, comprising a main upright column (220), a plurality of auxiliary upright columns (210), and connecting bodies (230), wherein the main upright column is configured to be connected to a tower (10); bottom walls (211) of the auxiliary upright columns are provided with stabilizing devices (300); each stabilizing device comprises a driving member (320), a first impeller (330), and a base (310) connected to the corresponding auxiliary upright column; each base is provided with an inner cavity (310a), and a first opening (310b) and a second opening (310c) communicated with the inner cavity, the first opening and the second opening have a height difference in a first direction, and the first opening, the inner cavity and the second opening form a seawater circulation channel; each first impeller is arranged in the corresponding inner cavity; and each driving member drives the corresponding first impeller to rotate and drive seawater to flow in the circulation channel, so as to adjust an angle of inclination between the whole floating body and a reference plane. The wind turbine foundation has a simple structure and relatively low costs. Also provided are a wind generating set and a control method.

Description

Wind turbine foundation, wind turbine generator set and control method

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202310818717.6 filed on June 30, 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 wind turbine foundation, 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 foundation is used to support the tower, nacelle and other components of the floating wind turbine. 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, the wind turbine foundation has six degrees of freedom in all directions. 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 become more complex. The motion stability of the floating wind turbine 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 is one of the problems that need to be solved urgently in the wind power field.

[0006] The wind turbine foundation in the related art mainly adjusts the overall inclination angle of the wind turbine foundation by controlling the mutual circulation of fluids between different floating bodies, so as to ensure the stability of the floating wind turbine generator set where the wind turbine foundation is located. However, this design method makes the overall structure of the wind turbine foundation complex and costly.

[0007] Summary of the Invention

[0008] The embodiments of the present application provide a wind turbine foundation, a wind turbine generator set, and a control method. The wind turbine foundation has a simple structure and relatively low cost.

[0009] On the one hand, according to an embodiment of the present application, a wind turbine foundation is proposed, which is arranged in seawater and used to support a tower, including: a floating body, including a main column, a plurality of auxiliary columns and a connector, the plurality of auxiliary columns are arranged at circumferential intervals around the main column and are respectively connected to the main column through the connector, the main column is used to be connected to the tower, each auxiliary column has a bottom wall that can be set toward the seawater along a first direction; a stabilizing device, the bottom wall of each auxiliary column is provided with a stabilizing device, the stabilizing device includes a driving member, a first impeller and a base connected to the auxiliary column, the base has an inner cavity and a first opening and a second opening connected to the inner cavity, the first opening and the second opening have a height difference in the first direction, the first opening, the inner cavity and the second opening form a circulation channel for seawater, the first impeller is arranged in the inner cavity, the driving member drives the first impeller to rotate and drives the seawater to flow in the circulation channel to adjust the inclination angle between the floating body as a whole and the reference plane.

[0010] On the other hand, according to an embodiment of the present application, a wind turbine generator set is provided, including: the above-mentioned wind turbine foundation; 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] In another aspect, according to an embodiment of the present application, a control method for the wind turbine generator set includes:

[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 inclination angle information of the wind turbine foundation is obtained;

[0014] When the tilt angle information exceeds the preset range, the stabilizing device connected to 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 first impeller in the stabilizing device connected to the target auxiliary column is controlled to rotate to adjust the fan foundation to the target posture.

[0016] According to the wind turbine foundation, wind turbine generator set, and control method provided in the embodiments of the present application, the wind turbine foundation includes a floating body and a stabilizing device. The main column of the floating body can be used to connect and support the tower. A plurality of auxiliary columns are arranged at intervals around the circumference of the main column and are respectively connected to the main column through a connector to ensure the stability of the main column supporting the tower. Since each auxiliary column is provided with a stabilizing device on the bottom wall in the first direction, and the stabilizing device includes a driving member, a first impeller, and a base connected to the auxiliary column, the base has an inner cavity and a first opening and a second opening connected to the inner cavity, the first opening, the inner cavity, and the second opening forming a circulation channel for seawater, the first impeller is arranged in the inner cavity, and the driving member drives the first impeller to rotate and drive seawater to flow in the circulation channel. Under the action of the flowing seawater, the corresponding auxiliary column can float or sink, thereby achieving the attitude adjustment of the entire wind turbine foundation and ensuring the power generation efficiency of the wind turbine generator set. In addition, by providing the stabilizing device with the above-mentioned structural form to achieve attitude adjustment, each auxiliary column can be adjusted independently, without the need for connecting pipes, valve groups, etc., resulting in a simple structure and low cost. At the same time, it can be achieved by only controlling the rotation of the first impeller, and the response speed is fast. 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 foundation according to an embodiment of the present application;

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

[0023] FIG6 is a flow chart of a control method according to an embodiment of the present application;

[0024] FIG7 is a control logic diagram of a control method according to an embodiment of the present application;

[0025] 8 to 11 are schematic diagrams of different incoming airflow directions according to an embodiment of the present application. 100 - Wind turbine body; 10 - Tower; 20 - Nacelle; 30 - Generator; 40 - Rotor; 41 - Hub; 42 - Blades; 50 - Mooring system; 60 - Seabed; 200 - Wind turbine foundation; 210 - Auxiliary columns; 210a - First auxiliary column; 210b - Second auxiliary column; 210c - Third auxiliary column; 211 - Bottom wall; 212 - Hollow cavity; 220 - Main column; 230 - Connector; 300 - Stabilizer; 310 - Base; 311 - End wall; 312 - Side wall; 310a - Inner cavity; 310b - First opening; 310c - Second opening; 320 - Drive element; 321 - Drive motor; 322 - Gearbox; 323 - Drive shaft; 324 - Rotor; 325 - Stator; 330 - first impeller; 331 - first hub; 332 - first blade; 340 - fairing; 341 - second hub; 342 - second blade; W - first direction.

[0026] In the drawings, like parts are given like reference numerals, but the drawings are not necessarily drawn to scale. DETAILED DESCRIPTION

[0027] 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.

[0028] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the wind turbine foundation, 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 directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0029] As shown in FIG1 , an embodiment of the present application provides a wind turbine generator set, comprising a wind turbine foundation 200 and a wind turbine body 100. The wind turbine body 100 includes a tower 10, a nacelle 20, a generator 30, and a rotor 40. The tower 10 is connected to the wind turbine foundation 200, the nacelle 20 is disposed at the top of the tower 10, and the generator 30 is disposed within the nacelle 20. In some examples, the generator 30 may be located outside the nacelle 20, or in some examples, inside the nacelle 20. The rotor 40 includes a hub 41 and a plurality of blades 42 connected to the hub 41. The rotor 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 achieving the power generation requirements of the wind turbine generator set. The wind turbine foundation 200 floats in the seawater. To limit its range of motion, it is fixed to the seabed 60 via a mooring system 50, thereby constraining its range of motion.

[0030] 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.

[0031] As shown in Figure 2, in terms of external loads, the wind turbine foundation 200 as a whole faces wind loads, wave loads, ocean current loads, ice loads, and other loads. In terms of overall wind turbine dynamics, due to the "floating" nature of the floating wind turbine, the wind turbine foundation 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 wind turbine systems, the motion characteristics and mechanisms of the floating wind turbine become more complex.

[0032] 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 captures wind energy to generate rotational mechanical energy, it also synchronously generates thrust in the same direction as the incoming wind. This force is transmitted to the wind turbine foundation 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.

[0033] To improve the stability of floating wind turbines, a ballast control system for floating wind turbine platforms (i.e., wind turbine foundations) 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.

[0034] However, during the implementation and application process, although this type of structural wind turbine foundation can improve the stability of the floating wind turbine generator set to a certain extent, the mutual linkage and adjustment of the ballast water between multiple internal volume stabilization pillars for accommodating ballast (water) based on the incoming wind speed and the posture of the unit requires a large pump set (several thousand cubic meters / hour), pipelines, valve bodies and other supporting hardware guarantees. On the one hand, it makes the structure complicated, and on the other hand, it places high demands on the reliability and redundancy design of the system. Once any component in the system fails, it will affect the performance and safety of the entire machine, and the cost is very high.

[0035] At the same time, from another dimension, the speed of ballast water adjustment between different stabilizing pillars through pump groups and pipeline types is extremely slow, generally between half an hour and an hour. The response speed of the system determines that the unit cannot match the incoming wind and wave loads in the optimal posture in most scenarios.

[0036] As shown in Figures 3 and 4, based on this, an embodiment of the present application provides a new wind turbine foundation 200, which is set in seawater and used to support a tower 10, including a floating body and a stabilizing device 300. The floating body includes a main column 220, a plurality of auxiliary columns 210 and a connector 230. The plurality of auxiliary columns 210 are arranged at circumferential Z intervals around the main column 220 and are respectively connected to the main column 220 through the connector 230. The main column 220 is used to be connected to the tower 10, and each auxiliary column 210 has a bottom wall 211 that can be set toward the seawater along a first direction W. The bottom wall 211 of each auxiliary column 210 is provided with a stabilizing device 300, which includes a driving member 320, a first impeller 330 and a base 310 connected to the auxiliary column 210. The base 310 has an inner cavity 310a and a first opening 310b and a second opening 310c connected to the inner cavity 310a. The first opening 310b and the second opening 310c have a height difference in the first direction W. The first opening 310b, the inner cavity 310a and the second opening 310c form a circulation channel for seawater. The first impeller 330 is arranged in the inner cavity 310a. The driving member 320 drives the first impeller 330 to rotate and drives seawater to flow in the circulation channel to adjust the inclination angle between the entire floating body and the reference surface.

[0037] There is one main pillar 220, and multiple auxiliary pillars 210. Multiple auxiliary pillars 210 are spaced apart in the circumferential Z direction of the main pillar 220. The number of auxiliary pillars 210 can be three, four, five, or even more. The line connecting the centers of the auxiliary pillars 210 can form a polygonal shape, such as a triangle, a quadrilateral, or a pentagon, and can optionally be a regular polygon. The center of the main pillar 220 can be located within the shape formed by the line connecting the centers of the auxiliary pillars 210, or can be located at the center of the shape formed by the line connecting the centers of the auxiliary pillars 210.

[0038] 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.

[0039] Optionally, the orthographic projection of each auxiliary column 210 in a direction perpendicular to the sea level can be a circle, an ellipse, or a polygon. If the polygon is a regular polygon, the main column 220 can have the same shape and structure as the auxiliary column 210, or it can be different from the auxiliary column 210.

[0040] Sea level can be understood as the surface of the sea water in a calm state without being affected by wind and waves.

[0041] The connecting body 230 can adopt a connecting rod, connecting plate or other structural forms. A connecting body 230 is connected between each auxiliary column 210 and the main column 220. The connecting body 230 and the main column 220 and the auxiliary column 210 can be connected by fasteners or an integrated structure. The extension length of each connecting body 230 can be equal.

[0042] The auxiliary column 210 may be in the form of a cylindrical structure, and the first direction W may be the axial direction of the auxiliary column 210 , and may also be understood as a direction perpendicular to the sea level or an extension direction of the tower.

[0043] The bottom wall 211 of each auxiliary column 210 in the first direction W can be connected to the stabilizing device 300 in a fixed connection manner, such as an integrated structure, or in a detachable connection manner using fasteners such as bolts.

[0044] The base 310 may be a closed cylindrical structure. Of course, it may also be a cylindrical structure with an open opening, and the open opening is closed by the bottom wall 211 of the connected auxiliary column 210 .

[0045] The first impeller 330 is arranged in the inner cavity 310a of the base 310 and can have rotational freedom relative to the base 310 and does not interfere with the side wall 312 of the base 310. The driving member 320 can be arranged in the inner cavity 310a and connected to the base 310. Of course, the driving member 320 can also be partially arranged on the auxiliary column 210, both of which can ensure the driving of the impeller.

[0046] The first opening 310b and the second opening 310c can be arranged opposite to each other in the first direction W, or can be staggered to ensure that there is a height difference between the two. When the seawater flows, it can drive the auxiliary column 210 to float up or sink in the first direction W.

[0047] In the wind turbine foundation 200 provided in the embodiment of the present application, the main column 220 of the floating body can be used to connect and support the tower 10, and multiple auxiliary columns 210 are arranged at circumferential Z intervals around the main column 220 and are respectively connected to the main column 220 through a connector 230 to ensure the stability of the main column 220 in supporting the tower 10. Since each auxiliary column 210 is provided with a stabilizing device 300 on the bottom wall 211 in the first direction W, and the stabilizing device 300 includes a driving member 320, a first impeller 330 and a base 310 connected to the auxiliary column 210, the base 310 has an inner cavity 310a and a first opening 310b and a second opening 310c connected to the inner cavity 310a, the first opening 310b, the inner cavity 310a and the second opening 310c form a circulation channel for seawater, and the first impeller 330 is arranged in the inner cavity 310a, and the first impeller 330 is driven to rotate by the driving member 320 and drives the seawater to flow in the circulation channel. Under the action of the flowing seawater, the corresponding auxiliary column 210 can float or sink, thereby realizing the posture adjustment of the entire wind turbine foundation 200 and ensuring the power generation efficiency of the wind turbine generator set. Furthermore, by providing the stabilizing device 300 of the above-mentioned structural form, posture adjustment is achieved, so that each auxiliary column 210 can be adjusted independently of each other, and no connecting pipes, valve groups, etc. are required between them, which has a simple structure and low cost.

[0048] At the same time, the wind turbine foundation 200 provided in the embodiment of the present application only needs to control the rotation of the first impeller 330 of the stabilizing device 300 at the corresponding position to achieve attitude adjustment when external factors such as incoming wind cause the floating foundation to have an inclination angle. The response is instantaneous and there is no need to wait for half an hour to an hour. The response speed of the system determines that the unit cannot match the incoming wind and wave load with the optimal attitude in most scenarios, thereby ensuring the power generation efficiency of the wind turbine generator set where the wind turbine foundation 200 is located.

[0049] In some optional embodiments, the wind turbine foundation 200 provided in the embodiments of the present application has a base 310 that is cylindrical as a whole. The base 310 has an end wall 311 arranged opposite to the bottom wall 211 in the first direction W and a side wall 312 arranged around the end wall 311. The end wall 311 and the side wall 312 enclose an inner cavity 310a. The bottom wall 211 is arranged to close the inner cavity 310a. The first opening 310b is arranged on the end wall 311, and the second opening 310c is arranged on the bottom wall 211.

[0050] The end wall 311 and the bottom wall 211 are spaced apart in the first direction W, and their surfaces may intersect and may be parallel to each other.

[0051] The side wall 312 is hollow, and one end of the side wall 312 in the first direction W is closed by the end wall 311 and the other end is closed by the bottom wall 211 of the connected auxiliary column 210 .

[0052] The number of first openings 310b can be one, or two or more. If there are two or more first openings 310b, the two or more first openings 310b are spaced apart from each other. Correspondingly, the number of second openings 310c can be one, or two or more. If there are two or more second openings 310c, the two or more second openings 310c can be spaced apart and distributed around the periphery of the sidewall 312.

[0053] The wind turbine foundation 200 provided in the embodiment of the present application has a base 310 in the above-mentioned form, has a simple structure, and can enclose a relatively independent space for the first impeller 330, so that the first impeller 330 can guide the seawater during rotation, guiding the seawater to flow between the first opening 310b and the second opening 310c, thereby ensuring the floating and sinking requirements of the connected auxiliary column 210, and further reliably ensuring the posture adjustment requirements of the wind turbine foundation 200 and the tower supported by it.

[0054] In some optional embodiments, in the wind turbine foundation 200 provided by the embodiments of the present application, along the first direction W, the radial dimension of the side wall 312 first decreases and then increases.

[0055] That is to say, the side wall 312 may be in the shape of a waist tube or a dumbbell.

[0056] The wind turbine foundation 200 provided in the embodiment of the present application, through the above-mentioned configuration, is conducive to guiding seawater upward or downward in the first direction W, ensuring the posture adjustment requirements of the auxiliary columns 210.

[0057] In some optional embodiments, in the wind turbine foundation provided by the embodiments of the present application, the driving member 320 may include a motor and a drive shaft 323. The motor is connected to at least one of the base 310 and the auxiliary column 210. The motor may be directly or indirectly connected to the drive shaft 323. The first impeller 330 is connected to the drive shaft 323. The motor may be a direct drive motor or a doubly fed motor.

[0058] The driving member 320 adopts the above-mentioned form, which can ensure the driving requirements for the first impeller 330, and has a simple and compact structure, which is convenient for installation.

[0059] In some optional embodiments, the fan base 200 provided in the embodiments of the present application, the driving component 320 includes a driving motor 321, a gearbox 322 and a driving shaft 323, the driving shaft 323 extends along the first direction W, the input end of the gearbox 322 is connected to the driving motor 321 and the output end is connected to the driving shaft 323, and the first impeller 330 is connected to the driving shaft 323.

[0060] The gearbox 322 can adopt a multi-stage transmission. The gearbox 322 is connected between the drive motor 321 and the drive shaft 323, so that the kinetic energy of the drive motor 321 can be transmitted to the drive shaft 323 through the gearbox 322. The speed output by the drive motor 321 can be accelerated or decelerated by the gearbox 322 before being transmitted to the drive shaft 323 to ensure the driving requirements of the drive shaft 323.

[0061] The axis of the drive shaft 323 and the axis of the drive motor 321 can be arranged to intersect, or of course, can be parallel. If they are arranged to intersect, they can be reversed through the gearbox 322, or an additional reversing structure can be provided to ensure the transmission of kinetic energy.

[0062] The fan foundation 200 provided in the embodiment of the present application and the driving member 320 adopting the above-mentioned form can ensure the driving requirements of the first impeller 330. In addition, the first impeller 330 can achieve a higher rotation speed, thereby improving the response rate of the fan foundation 200 when performing posture adjustment.

[0063] In the fan foundation 200 provided in the embodiment of the present application, the driving member 320 can be entirely located within the inner cavity 310a of the base 310, and the driving motor 321 and the gearbox 322 can be supported by a mounting frame or other structure. Of course, this is an optional embodiment.

[0064] In some optional embodiments, the fan foundation 200 provided in the embodiments of the present application can also enable the auxiliary column 210 to have a hollow cavity 212, the drive motor 321 and the gearbox 322 to be located in the hollow cavity 212, the drive shaft 323 to be inserted into the bottom wall 211 and connected to the output end of the gearbox 322, and the drive shaft 323 to be dynamically sealed with the bottom wall 211.

[0065] The driving motor 321 and the gear box may both be supported by the bottom wall 211 .

[0066] Dynamic seal can be understood as: the seal between relatively moving parts in a machine (or equipment), that is, the two parts can move relative to each other while ensuring sealing between each other.

[0067] The wind turbine foundation 200 provided in the embodiment of the present application has a hollow cavity 212 in the auxiliary column 210, thereby providing installation space for the drive motor 321 and the gearbox 322, reducing the space occupied by the base 310 and the volume of the base 310. Furthermore, the drive motor 321 and the gearbox 322 provide a certain weight for the auxiliary column 210, providing a certain amount of ballast and ensuring the stability of the auxiliary column 210.

[0068] The dynamic seal between the drive shaft 323 and the bottom wall 211 ensures the rotation of the drive shaft 323 and drives the first impeller 330. Furthermore, the dynamic seal ensures the sealing performance of the hollow cavity 212 of the auxiliary column 210, preventing seawater from entering and causing corrosion of the auxiliary column 210, flooding of the generator and gearbox, and even affecting the weight of the auxiliary column 210.

[0069] Optionally, the dynamic seal can be achieved by using a bearing with a sealing function, or by using a labyrinth seal, etc., which will not be described in detail here.

[0070] In some optional embodiments, the wind turbine foundation 200 provided in the embodiments of the present application, the first impeller 330 includes a first hub 331, a plurality of first blades 332, and a pitch system (not shown), the first hub 331 is connected to the driving member 320, and the plurality of first blades 332 are spaced apart in the circumferential direction Z of the first hub 331 and are connected to the first hub 331 through the pitch system to adjust the pitch angle of the first blades 332.

[0071] The structure of the variable pitch system can adopt the variable pitch form of the wind turbine rotor 40, and the angle of attack of the fluid on the first blade 332 is changed by changing the pitch angle between the first blade 332 and the first hub 331.

[0072] The wind turbine foundation 200 provided in the embodiment of the present application is configured such that the first impeller 330 includes a first blade 332 and a first hub 331, and the two are rotatably connected via a variable pitch system, so that the pitch angle of the first blade 332 is adjustable, thereby changing the interaction force with the seawater to control the torque and power captured by the first impeller 330.

[0073] Optionally, the pitch system may include a pitch bearing and a power source. The pitch bearing may include an inner ring and an outer ring that are rotatably coupled, one of which is connected to the first hub 331 and the other to the first blade 332. The power source may cooperate with the pitch bearing and drive the inner and outer rings of the pitch bearing to rotate relative to each other, thereby achieving pitch control. The power source includes, but is not limited to, an electric motor and a transmission wheel, consistent with the pitch control principle of the hub and blades of a wind turbine.

[0074] In some optional embodiments, the wind turbine foundation 200 provided in the embodiments of the present application, the stabilizing device 300 also includes a rectifying member 340 arranged in the inner cavity 310a and connected to the base 310, and the rectifying member 340 is arranged between the first opening 310b and the first impeller 330 to rectify the flow direction of seawater entering through the first opening 310b.

[0075] The rectifying member 340 may be connected to the base 310 . The rectifying member 340 may be a plate with rectifying holes or may be in the form of an impeller.

[0076] The wind turbine foundation 200 provided in the embodiment of the present application, by making the stabilizing device 300 also include a straightening component 340, can use the straightening component 340 to adjust the flow direction of the incoming seawater, thereby preventing seawater from entering from multiple directions and contacting the first impeller 330 to cause energy loss.

[0077] In some optional embodiments, the fairing 340 includes a second hub 341 and a plurality of second blades 342, wherein the plurality of second blades 342 are spaced apart in the circumferential direction of the second hub 341 and connected to the second hub 341, and one end of the second blade 342 facing away from the second hub 341 is connected to the base 310, and a fairing hole is formed between two adjacent second blades 342.

[0078] The number of the second blades 342 included in the fairing 340 can be two, three, or more, as long as the incoming seawater can be rectified and energy loss can be reduced.

[0079] The fan foundation 200 and the rectifying member 340 provided in the embodiment of the present application adopt the above-mentioned form, which can not only meet the rectification requirements for the incoming and outgoing seawater, but also has a simple structure and a good rectification effect.

[0080] It can be understood that the fan foundation 200 provided in the above embodiments of the present application is illustrated by taking the driving component 320 including the driving motor 321, the gearbox 322 and the driving shaft 323 as examples. These are some optional embodiments, but are not limited to the above methods.

[0081] As shown in Figure 5, in some embodiments, the driving member 320 can also include a direct drive motor, which is connected to the bottom wall 211 and includes a rotor 324 and a stator 325 that are rotatably matched. The driving shaft 323 is coaxially arranged with the direct drive motor and connected to the rotor 324.

[0082] The direct drive motor can be directly connected to the base 310, or can be connected to the bottom wall 211 of the auxiliary column 210. Of course, in order to ensure the connection strength, it can also be connected to the base 310 and the bottom wall 211 at the same time.

[0083] Optionally, the direct drive motor can be located in the inner cavity 310a of the base 310. Of course, when the auxiliary column 210 has a hollow cavity 212, the direct drive motor can also be located in the hollow cavity 212. Optionally, it can be located in the inner cavity 310a of the base 310.

[0084] The fan foundation 200 provided in the embodiment of the present application, in which the driving member 320 adopts the above-mentioned form, can also meet the driving requirements for the first impeller 330, thereby ensuring the posture adjustment requirements of the fan foundation 200.

[0085] In some optional embodiments, in the wind turbine foundation 200 provided in the embodiments of the present application, the center line of multiple auxiliary columns 210 forms a regular polygon, the center of the main column 220 coincides with the center of the regular polygon, and a connector 230 is connected between two adjacent auxiliary columns 210 in the circumferential direction Z of the main column 220.

[0086] The regular polygon formed by connecting the centers of the plurality of floating bodies may be a regular triangle, a regular quadrilateral, a regular pentagon, or other regular polygons. Each auxiliary column 210 may be provided with a stabilizing device 300 .

[0087] The wind turbine foundation 200 provided in the embodiment of the present application, through the above-described arrangement, can ensure high overall strength and stability, formed by the main column 220 and the auxiliary columns 210 connected by the connector 230. Furthermore, the center of the main column 220 coincides with the center of the regular polygon, ensuring uniform load-bearing capacity around the perimeter of the main column 220. This allows for rapid response and high stability during posture adjustment.

[0088] The wind turbine generator set provided in the embodiments of the present application, because it includes the wind turbine foundation 200 provided in the aforementioned embodiments, has a tower 10 connected to and supported by a main column 220. A plurality of auxiliary columns 210 are arranged at intervals in the circumferential direction Z of the main column 220 and are connected to the main column 220 via connectors 230, ensuring the stability of the tower support provided by the main column 220, thereby improving the safety performance of the wind turbine generator set. Since each auxiliary column 210 is provided with a stabilizing device 300 on the bottom wall 211 in the first direction W, and the stabilizing device 300 includes a driving member 320, a first impeller 330 and a base 310 connected to the auxiliary column 210, the base 310 has an inner cavity 310a and a first opening 310b and a second opening 310c connected to the inner cavity 310a, the first opening 310b, the inner cavity 310a and the second opening 310c form a circulation channel for seawater, and the first impeller 330 is arranged in the inner cavity 310a, and the first impeller 330 is driven to rotate by the driving member 320 and drives the seawater to flow in the circulation channel. Under the action of the flowing seawater, the corresponding auxiliary column 210 can float or sink, thereby realizing the posture adjustment of the entire wind turbine foundation 200 and ensuring the power generation efficiency of the wind turbine generator set. Furthermore, by providing the above-described structural form of the stabilizing device 300 to achieve posture adjustment, each auxiliary column 210 can be adjusted independently, without requiring interconnecting pipes, valves, or other connections, resulting in a simple structure and low cost. Furthermore, this can be achieved by simply controlling the rotation of the first impeller 330, resulting in a fast response speed.

[0089] As shown in FIG6 and FIG7 , on the other hand, the embodiment of the present application further provides a control method of the above-mentioned wind turbine generator set, including:

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

[0091] S200 : If the current power information continuously exceeds a first threshold value within a preset time period, obtain the inclination angle information of the wind turbine foundation 200 .

[0092] S300, when the tilt angle information exceeds a preset range, the stabilizing device 300 connected to 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.

[0093] S400 , controlling the first impeller 330 in the stabilizing device 300 connected to the target auxiliary column to rotate, so as to adjust the wind turbine foundation 200 to a 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 generator set impeller. Combined with the shape of the wind turbine foundation 200 and the state of the unit 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 wind turbine foundation 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. Theoretical calculations based on this input can 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 achieved needs to be combined with the impeller orientation state.

[0098] In step S400, the first impeller 330 can be driven to rotate by controlling the driving member 320 of the stabilizing device 300 connected to the target auxiliary column, so that the seawater flows upward or downward along the first direction W in the circulation channel, and then drives the connected auxiliary column 210 to float up or sink along the first direction W, thereby realizing the posture adjustment of the wind turbine foundation 200.

[0099] The control method 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 rotation of the first impeller 330 in the target auxiliary column can be controlled to drive the seawater to flow in the circulation channel, thereby realizing the floating, sinking and other actions of the target auxiliary column, and realizing the posture adjustment of the wind turbine foundation 200, 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.

[0100] In some optional embodiments, the control method provided in the embodiments of the present application takes as an example a wind turbine foundation 200 including 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 connecting the first auxiliary column 210a and the main column 220 and the reference wind direction Y is 60°, the angle between the center line connecting the second auxiliary column 210b and the main column 220 and the reference wind direction is 300°, and the angle between the center line connecting the third auxiliary column 210c and the main column 220 and the reference wind direction is 180°. The tilt angle information includes the tilt angle θ of the floating body relative to a preset reference plane.

[0101] As shown in Figures 7 to 11, based on the environmental input, the power and continuous power generation time of the wind turbine are first determined. When the unit power P≥a (for example, a=3000kW) and the duration t≥b (for example, b=20min) are simultaneously satisfied, the tilt angle θ (θ can be α roll, β pitch, γ yaw) can be measured by the tilt sensor combination. If the angle θ≥c (for example, c=5°), the stability adjustment calculation module of the floating wind turbine is performed. The module first obtains the current state of the floating wind turbine through the unit information, such as mooring tension, gravity, floating body bending moment, and center of buoyancy information; further theoretical calculation based on this input can 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 column or multiple columns, and the input to be achieved needs to be combined with the impeller orientation state.

[0102] Exemplarily, the step of determining the stabilizing device 300 connected to the target auxiliary column to be adjusted according to the tilt angle information, the direction of the incoming wind, and the target attitude information corresponding to the target attitude to be adjusted includes:

[0103] As shown in Figure 8 , when the inclination angle θ of the wind turbine foundation 200 relative to the preset reference plane is greater than a second threshold value c, and the angle a between the incoming wind flow X and the reference wind direction Y is 90°, this can be achieved through the coordinated movement of the stabilizing devices 300 connected to the second and third auxiliary columns 210b, 210c. At this point, the stabilizing devices 300 connected to the second and third auxiliary columns 210b, 210c can be activated, causing their respective first impellers 330 to rotate forward, causing the second and third auxiliary columns 210b, 210c to float upward, restoring the inclination angle θ to within the preset threshold value.

[0104] As shown in Figure 9, when the inclination angle of wind turbine foundation 200 relative to the preset reference plane is greater than a second threshold value c, and the angle a between the incoming wind flow X and the reference wind direction Y is 180°, the stabilization device 300 connected to the third auxiliary column 210c can be activated. At this point, the stabilization device 300 connected to the second auxiliary column 210b can be activated, causing its first impeller 330 to rotate forward and the third auxiliary column 210c to float upward, restoring the inclination angle θ to within the preset threshold value.

[0105] As shown in Figure 10 , when the inclination angle of wind turbine foundation 200 relative to a preset reference plane exceeds a second threshold value c, and the angle a between the incoming wind flow X and the reference wind direction Y is 270°, this can be achieved through the coordinated movement of the stabilizing devices 300 connected to the first and third auxiliary columns 210a, 210c. At this point, the stabilizing devices 300 connected to the first and third auxiliary columns 210a, 210c can be activated, causing their respective first impellers 330 to rotate forward, causing the first and third auxiliary columns 210a, 210c to float upward, restoring the inclination angle θ to within the preset threshold range.

[0106] As shown in Figure 11, when the inclination angle of wind turbine foundation 200 relative to a preset reference plane is greater than a second threshold value c, and the angle a between the incoming wind flow X and the reference wind direction Y is 360° or 0°, this can be achieved through the coordinated movement of the stabilizing devices 300 connected to the first and second auxiliary columns 210a, 210b. At this point, the stabilizing devices 300 connected to the first and second auxiliary columns 210a, 210b can be activated, causing their respective first impellers 330 to rotate forward, causing the first and second auxiliary columns 210a, 210b to float upward, restoring the inclination angle θ to within the preset threshold range.

[0107] When the angle a between the incoming wind and the reference wind direction is between the above values, the corresponding auxiliary columns 210 in the two states can be adjusted comprehensively.

[0108] Taking 0° to 90° as an example, a gradually increases from 0° to 90°. From 0° to the point where the X-direction of the incoming airflow and the center line connecting the second auxiliary column 210b and the main column 220 are collinear, the stabilizing device 300 connected to the first auxiliary column 210a and the second auxiliary column 210b can be adjusted. When the X-direction of the incoming airflow and the center line connecting the second auxiliary column 210b and the main column 220 are collinear, the stabilizing device 300 connected to the second auxiliary column 210b can be adjusted. When the incoming wind direction X and the center line connecting the second auxiliary column 210b and the main column 220 are collinear to 90°, the stabilizing device 300 connected to the second auxiliary column 210b and the third auxiliary column 210c can be adjusted. The principles of 90° to 180°, 180° to 270°, and 270° to 360° are the same as above. As long as the posture of the wind turbine foundation 200 can be adjusted so that its inclination angle is within the preset range, the power generation efficiency of the wind turbine generator set can be guaranteed.

[0109] In some optional embodiments, the control method provided in the embodiments of the present application, the first impeller 330 includes a first hub 331, a plurality of first blades 332, and a pitch system, and the plurality of first blades 332 are spaced apart in the circumferential direction Z of the first hub 331 and connected to the first hub 331 through the pitch system.

[0110] Before step S400, the method further includes:

[0111] The required rotation information of the target auxiliary column is determined according to the height difference between the draft of the target auxiliary column and the set water surface line.

[0112] The rotation information includes at least one of the rotation speed of the first impeller 330 and the angle between the first blades 332 and the first hub 331 .

[0113] Alternatively, the set water surface line can be understood as a line pre-set on the target auxiliary column, which can be a marked line with a mark, etc. The draft can be understood as the position line where the auxiliary column 210 is immersed relative to the set water surface line when the wind turbine foundation 200 is tilted.

[0114] Step S400 may specifically include:

[0115] Get rotation information;

[0116] The first impeller 330 in the stabilizing device 300 to which the target auxiliary column is connected is controlled to rotate according to the rotation information.

[0117] The control method provided in the embodiment of the present application determines the rotation information required for the target auxiliary column based on the height difference between the draft of the target auxiliary column and the set water surface line, and the rotation information is specifically limited to the above information. It can accurately control the rotation speed of the first impeller 330, and can also give the corresponding matching angle between the first blade 332 and the first hub 331 to quickly adjust the posture of the wind turbine base 200 to meet the optimal angle requirement of the wind turbine generator set in which it is located.

[0118] In some optional embodiments, the control method provided in the embodiments of the present application, wherein the rotation angle a of the first blade 332 relative to the first hub 331 satisfies 0°<a≤90°, and the step of determining the rotation information required for the target auxiliary column based on the height difference between the draft of the target auxiliary column and the set water surface line includes:

[0119] When the height difference H is in the range of 0<H≤h1, the first blade 332 rotates to A=90° relative to the first hub 331, or when the height difference H is in the range of h1<H≤h2, the first blade 332 rotates to 50°<A≤60° relative to the first hub 331, and the rotational speed of the first impeller 330 is 800rpm-1500rpm.

[0120] When the height difference H is in the range of h1<H≤h2, the first blade 332 rotates relative to the first hub 331 to 30°<A≤50°, and the rotation speed of the first impeller 330 is 1500 rpm-2500 rpm.

[0121] When the value range of the height difference H is h2<H≤h3, the first blade 332 rotates relative to the first hub 331 to 0°<A≤20°, and the rotation speed of the first impeller 330 is 2500 rpm-3500 rpm.

[0122] The control method provided in the embodiment of the present application can, through the above-mentioned setting, match the angle of the first blade 332 relative to the first hub 331 and the rotation speed of the first impeller 330 according to different height differences, so as to quickly adjust the posture of the wind turbine base 200 to meet the optimal angle requirements of the wind turbine generator set in which it is located.

[0123] In some optional embodiments, the control method provided in the embodiments of the present application, after the step of adjusting the volume of seawater in the target floating body until the wind turbine foundation 200 reaches the target posture, the control method further includes:

[0124] Get the current power information of the wind turbine;

[0125] If the current power information is continuously less than the first threshold value within a preset time period, the first impeller 330 in the stabilizing device 300 connected to the target auxiliary column is controlled to move in the reverse direction to adjust the wind turbine foundation 200 to return to the initial state.

[0126] The initial state may be understood as a state before the tilt angle information exceeds a preset range.

[0127] In some optional embodiments, based on the impeller being in the azimuth state, the rotation speed of the first impeller 330 of the stabilizing device 300 connected to the target auxiliary column is first reduced, and then the first blade 332 is retracted (returned to 90°), and finally the power source is cut off and the movement of the first blade 332 is shut down until the wind turbine foundation enters the reset state.

[0128] For example, when the angle a between the incoming wind X and the reference wind direction Y is 90°, restoration to the initial state can be achieved through the coordination of the stabilizing devices 300 connected to the second and third auxiliary columns 210b, 210c. The first blades 332 of the stabilizing devices 300 connected to the second and third auxiliary columns 210b, 210c can be reversed to cause the second and third auxiliary columns 210b, 210c to sink, achieving restoration.

[0129] Of course, when the angle a between the incoming wind X and the reference wind direction Y is 90°, when restoring the initial state, the rotation speed of the first impeller 330 of the stabilizing device 300 connected to the second auxiliary column 210b and the third auxiliary column 210c can also be reduced, and then the first blade 332 is retracted (returned to 90°), and finally the power source is cut off, and the movement of the first blade 332 is shut down until the wind turbine generator set enters the reset state.

[0130] The operation methods corresponding to other orientation states are the same as above and will not be repeated here.

[0131] The wind turbine generator set provided in the embodiment 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, the inclination angle information of the wind turbine base 200 is obtained; when the inclination angle information exceeds a preset range, the stabilization device 300 connected to the target auxiliary column that needs to be adjusted is determined 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; the first impeller 330 in the stabilization device 300 connected to the target auxiliary column is controlled to rotate to adjust the wind turbine base 200 to 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 embodiments by setting a controller, which is beneficial to the control of the wind turbine base 200, so that it can control and adjust the corresponding stabilization device 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 wind turbine foundation, arranged in seawater and used to support a tower, wherein: include: A floating body, comprising a main column, a plurality of auxiliary columns and a connector, wherein the plurality of auxiliary columns are arranged at intervals around the circumference of the main column and are respectively connected to the main column through the connector, the main column is used to be connected to the tower, and each of the auxiliary columns has a bottom wall that can be arranged toward the seawater along a first direction; A stabilizing device is provided on the bottom wall of each auxiliary column, and the stabilizing device includes a driving member, a first impeller, and a base connected to the auxiliary column, the base having an inner cavity and a first opening and a second opening connected to the inner cavity, the first opening and the second opening having a height difference in a first direction, the first opening, the inner cavity, and the second opening forming a circulation channel for the seawater, the first impeller being arranged in the inner cavity, the driving member driving the first impeller to rotate and driving the seawater to flow in the circulation channel to adjust the inclination angle between the floating body as a whole and the reference plane.

2. The wind turbine foundation according to claim 1, wherein: The base is cylindrical as a whole, and has an end wall arranged opposite to the bottom wall in the first direction and a side wall arranged around the end wall. The end wall and the side wall enclose the inner cavity, and the bottom wall closes the inner cavity. The first opening is arranged on the end wall, and the second opening is arranged on the bottom wall.

3. The wind turbine foundation according to claim 2, wherein: Along the first direction, the radial dimension of the side wall first decreases and then increases.

4. The wind turbine foundation according to claim 1, wherein: The driving member includes a driving motor, a gearbox and a driving shaft. The driving shaft extends along the first direction. The input end of the gearbox is connected to the driving motor and the output end is connected to the driving shaft. The first impeller is connected to the driving shaft.

5. The wind turbine foundation according to claim 4, wherein: The auxiliary column has a hollow cavity, the drive motor and the gearbox are located in the hollow cavity, the drive shaft is inserted into the bottom wall and connected to the output end of the gearbox, and the drive shaft is dynamically sealed with the bottom wall.

6. The wind turbine foundation according to claim 1, wherein: The driving member includes a direct drive motor and a driving shaft, wherein the driving shaft extends along the first direction, the first impeller is connected to the driving shaft, the direct drive motor is connected to one of the bottom wall and the base and includes a rotor and a stator that are rotatably matched, and the driving shaft is coaxially arranged with the direct drive motor and connected to the rotor.

7. The wind turbine foundation according to claim 1, wherein: The first impeller includes a first hub, a plurality of first blades and a pitch system. The first hub is connected to the driving member. The plurality of first blades are spaced apart in the circumferential direction of the first hub and are connected to the first hub through the pitch system to adjust the pitch angle of the first blades.

8. The wind turbine foundation according to claim 1, wherein: The stabilizing device further includes a rectifying member disposed in the inner cavity and connected to the base, wherein the rectifying member is disposed between the first opening and the first impeller to rectify the flow direction of the seawater entering through the first opening.

9. The wind turbine foundation according to claim 8, wherein: The fairing component includes a second hub and a plurality of second blades, wherein the plurality of second blades are spaced apart in the circumferential direction of the second hub and connected to the second hub, an end of the second blade facing away from the second hub is connected to the base, and a fairing hole is formed between two adjacent second blades.

10. The wind turbine foundation according to claim 1, wherein: The center line connecting the plurality of auxiliary columns is a regular polygon, the center of the main column coincides with the center of the regular polygon, and the connector is connected between two adjacent auxiliary columns in the circumferential direction of the main column.

11. A wind turbine generator set, wherein: include: The wind turbine foundation according to any one of claims 1 to 10; 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.

12. The wind turbine generator set according to claim 11, wherein: Also included is a controller configured to: Acquire 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, acquire the inclination angle information of the wind turbine foundation; when the When the inclination angle information exceeds the preset range, the stabilizing device connected to the target auxiliary column that needs to be adjusted is determined based on the inclination angle information, the direction of the incoming wind flow, and the target attitude information when adjusting to the target attitude; the first impeller in the stabilizing device connected to the target auxiliary column is controlled to rotate to adjust the fan foundation to the target attitude.

13. A control method for a wind turbine generator set as claimed in claim 11, wherein: include: 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 inclination angle information of the wind turbine foundation is obtained; When the tilt angle information exceeds a preset range, the stabilizing device connected to the target auxiliary column to be adjusted is determined 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; The first impeller in the stabilizing device connected to the target auxiliary column is controlled to rotate to adjust the fan foundation to the target posture.

14. The control method according to claim 13, wherein: The first impeller comprises a first hub, a plurality of first blades and a pitch system, wherein the plurality of first blades are arranged at intervals in the circumferential direction of the first hub and are connected to the first hub through the pitch system; Before the step of controlling the rotation of the first impeller in the stabilizing device connected to the target auxiliary column to adjust the wind turbine foundation to the target posture, the method further includes: Determine the rotation information required for the target auxiliary column according to the height difference between the draft of the target auxiliary column and the set water surface line; The rotation information includes at least one of a rotation speed of the first impeller and an angle between the first blade and the first hub; The step of controlling the rotation of the first impeller in the stabilizing device connected to the target auxiliary column comprises: Acquiring the rotation information; The first impeller in the stabilizing device connected to the target auxiliary column is controlled to rotate according to the rotation information.

15. The control method according to claim 14, wherein: The rotation angle a of the first blade relative to the first hub satisfies 0°<A≤90°, and the step of determining the rotation information required for the target auxiliary column according to the height difference between the draft of the target auxiliary column and the set water surface line comprises: When the value range of the height difference H is 0<H≤h1, the first blade rotates to A=90° relative to the first hub, or the first blade rotates to 50°<A≤60° relative to the first hub, and the speed of the first impeller is 800rpm-1500rpm; When the value range of the height difference H is h1<H≤h2, the first blade rotates relative to the first hub to 30°<A≤50°, and the speed of the first impeller is 1500rpm-2500rpm; When the value range of the height difference H is h2<H≤h3, the first blade rotates relative to the first hub to 0°<A≤20°, and the rotation speed of the first impeller is 2500rpm-3500rpm.

16. The control method according to claim 14, wherein: After the step of adjusting the volume of seawater in the target floating body until the wind turbine foundation 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 within a preset time period, the first impeller in the stabilizing device connected to the target auxiliary column is controlled to move in the reverse direction to adjust the wind turbine foundation to return to the initial state; or, Get the current power information of the wind turbine generator set; If the current power information is continuously less than the first threshold value within a preset time period, the rotation speed of the first impeller in the stabilizing device connected to the target auxiliary column is reduced; The first impeller in the target floating body is retracted and the rotation of the first impeller is stopped to adjust the wind turbine foundation to return to the initial state.

Images