Floating support foundation, wind turbine generator, and control method

Abstract

The application relates to a floating support foundation, a wind turbine generator set and a control method. The floating support foundation comprises a floating main body, n floating columns arranged at intervals and centered on a first axis, and a connecting body connected between two adjacent floating columns, n>=3, the n floating columns comprising a first floating column and n-1 second floating columns, the first floating column being used for supporting a tower; a stabilizing device is connected to each second floating column, the stabilizing device comprising a driving member, a first impeller and a base connected to the second floating column, the base having an inner cavity, a first opening and a second opening in communication with the inner cavity, the first opening, the inner cavity and the second opening forming a flow channel for seawater, the first impeller being arranged in the inner cavity, the driving member driving the first impeller to rotate and driving seawater to flow in the flow channel, so as to adjust the floating or sinking of the second floating column connected to the stabilizing device. The application has a simple structure and relatively low cost.

Description

Technical Field

[0001] This invention relates to the field of wind power technology, and in particular to a floating support foundation, a wind turbine generator set, and a control method. Background Technology

[0002] The wind power industry continues to contribute to the achievement of dual-carbon goals, with wind turbines currently developing towards larger unit capacity, lighter overall design, greater intelligence, and marine applications. Statistics show that the cumulative installed capacity of offshore wind power is increasing year by year. With the large-scale development of near-shore resources, the development and utilization of deep-sea resources are receiving increasing attention. In this context, floating wind turbines are gradually developing and will become a driving force for future offshore wind power development.

[0003] Floating support foundations are used to support components such as the tower and nacelle of floating wind turbine generators. When the generator faces wind loads, wave loads, ocean current loads, ice loads, etc., from the perspective of overall dynamics, due to the "floating" characteristic of floating wind turbine generators, the floating support foundation has six degrees of freedom in all directions. Under the intertwined coupling effects of the randomness of external loads and the complexity of the generator's own motion, the overall sublinear characteristics of the floating wind turbine generator become more complex. The motion stability of floating wind turbine generators is one of the most important indicators to ensure the continuous, stable, safe, and efficient output of the generator and to ensure the power generation. Therefore, how to ensure the stability of floating wind turbine generators is one of the problems that urgently need to be solved in the wind power field.

[0004] The floating support foundation in related technologies mainly adjusts the overall tilt angle of the floating support foundation by controlling the mutual flow of fluid between different floating columns, thereby ensuring the stability of the floating wind turbine generator on which the floating support foundation is located. However, this design method makes the overall structure of the floating support foundation complex and costly. Summary of the Invention

[0005] This invention provides a floating support foundation, a wind turbine generator set, and a control method. The floating support foundation has a simple structure and relatively low cost.

[0006] On one hand, according to an embodiment of the present invention, a floating support foundation is proposed, which can be set in seawater and used to support a tower. The floating support foundation includes: a floating body, including n floating columns spaced apart from each other with a first axis as the center, and a connecting body connecting each adjacent pair of floating columns, where n≥3, the n floating columns include a first floating column and n-1 second floating columns, the first floating columns being used to connect to and support the tower; and a stabilizing device, each second floating column being connected to a stabilizing device, the stabilizing device including a driving component, a first impeller, and a base connected to the second floating column, the base having an inner cavity and a first opening and a second opening communicating with the inner cavity, the first opening, the inner cavity, and the second opening forming a seawater flow channel, the first impeller being disposed in the inner cavity, the driving component driving the first impeller to rotate and causing seawater to flow in the flow channel, so as to adjust the second floating column connected to the stabilizing device to float or sink.

[0007] According to one aspect of the present invention, the base is cylindrical in shape and has an end wall disposed opposite to the bottom wall of the second floating column in a first direction and a side wall disposed around the end wall. The end wall and the side wall enclose an inner cavity, and the bottom wall closes the inner cavity. A first opening is disposed on the end wall and a second opening is disposed on the side wall.

[0008] According to one aspect of the present invention, the center line connecting each floating column is a regular polygon, and the base of each stabilizing device is coaxially arranged with the second floating column to which it is connected.

[0009] According to one aspect of the present invention, the radial dimension of the sidewall first decreases and then increases along a first direction.

[0010] According to one aspect of the present invention, the driving component includes a drive motor, a gearbox, and a drive shaft. The input end of the gearbox is connected to the drive motor, and the output end is connected to the drive shaft. A first impeller is connected to the drive shaft.

[0011] According to one aspect of the present invention, the second floating column has a hollow cavity, a drive motor and a gearbox are located in the hollow cavity, the drive shaft is inserted into the bottom wall of the second floating column and connected to the output end of the gearbox, and the drive shaft is dynamically sealed to the bottom wall.

[0012] According to one aspect of the present invention, the driving component includes a direct drive motor, which is connected to at least one of the bottom wall of the second floating column and the base and includes a rotor and a stator that are rotatably engaged. The drive shaft is coaxially arranged with the direct drive motor and connected to the rotor.

[0013] According to one aspect of the present invention, the first impeller includes a first hub, a plurality of first blades, and a pitch system. The first hub is connected to a drive member, and the plurality of first blades are spaced apart in the circumferential direction of the first hub and connected to the first hub through the pitch system to adjust the pitch angle of the first blades.

[0014] According to one aspect of the present invention, the stabilizing device further includes a rectifier disposed in the inner cavity and connected to the base, the rectifier being disposed between the first opening and the first impeller to rectify the flow direction of seawater entering through the first opening.

[0015] According to one aspect of the present invention, the rectifier includes a second hub and a plurality of second blades, the plurality of second blades being spaced apart in the circumferential direction of the second hub and connected to the second hub, the end of the second blade facing away from the hub being connected to a base, and a rectifier hole being formed between two adjacent second blades.

[0016] In another aspect, according to an embodiment of the present invention, a wind turbine generator set is provided, comprising: the aforementioned floating support foundation; a wind turbine body disposed on a first floating column, the wind turbine body including a tower connected to the first floating column, a nacelle disposed on the tower, and an impeller disposed on the nacelle.

[0017] According to another aspect of the present invention, a controller is further included, the controller being configured to: acquire current power information of the wind turbine generator set; acquire tilt angle information of the floating support foundation if the current power information continuously exceeds a first threshold within a preset time period; determine the direction information of the first impeller of each stabilizing device according to the direction of the incoming wind when the tilt angle information exceeds a preset range; and control the drive component to drive each first impeller to rotate according to the direction information, so as to adjust the tilt angle information of the floating support foundation to a preset range.

[0018] In another aspect, according to an embodiment of the present invention, a control method for the above-mentioned wind turbine generator set includes:

[0019] Obtain the current power information of the wind turbine generator set;

[0020] If the current power information continues to exceed the first threshold within a preset time period, the tilt angle information of the floating support foundation is obtained.

[0021] When the tilt angle information exceeds the preset range, the direction of rotation of the first impeller of each stabilizing device is determined according to the direction of the incoming airflow.

[0022] The steering information is used to control the drive components to rotate each first impeller, thereby adjusting the tilt angle of the floating support foundation to a preset range.

[0023] According to another aspect of the present invention, the steering information includes forward rotation and reverse rotation;

[0024] When the first impeller of the stabilizing device rotates in the forward direction, the stabilizing device provides an upward driving force to the connected second floating column;

[0025] When the first impeller of the stabilizing device rotates in the opposite direction, the stabilizing device provides a sinking driving force to the connected second floating column.

[0026] According to another aspect of the present invention, the number of second floating columns is two, and the step of determining the direction information of the first impeller of each stabilizing device based on the incoming wind direction when the tilt angle information exceeds a preset range includes:

[0027] When the tilt angle information exceeds the preset range, the two stabilizing devices are controlled to rotate synchronously in the forward direction, synchronously in the reverse direction, or one rotates in the forward direction and the other rotates in the reverse direction, based on the angle between the incoming wind direction and the reference wind direction.

[0028] According to another aspect of the present invention, the first impeller includes a first hub, a plurality of first blades, and a pitch system. The plurality of first blades are spaced apart in the circumferential direction of the first hub and connected to the first hub through the pitch system. The control method further includes:

[0029] The rotational speed of the first impeller and the angle between the first blade and the first hub are determined based on the height difference between the draft of each of the second floating columns connected to the stabilizing device and the set water surface line.

[0030] Based on at least one of the rotational speed information and angle information, the drive unit is controlled to drive each first impeller to rotate, so as to adjust the tilt angle information of the floating support foundation to a preset range.

[0031] According to another aspect of the present invention, the rotation angle α of the first blade relative to the first hub satisfies 0°<α≤90°. The step of determining at least one of the rotational speed information of the first impeller and the angle information between the first blade and the first hub based on the height difference between the draft of each of the second floating columns connected to the stabilizing device and a set water surface line includes:

[0032] When the height difference H is in the range of 0 < H ≤ h1, the first blade rotates relative to the first hub to a = 90° or the first blade rotates relative to the first hub to 50° < a ≤ 60°, and the speed of the first impeller is 800 rpm - 1500 rpm.

[0033] When the height difference H is in the range of 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.

[0034] When the height difference H is in the range of h2<H≤h3, the first blade rotates relative to the first hub to 0°<a≤20°, and the speed of the first impeller is 2500rpm-3500rpm.

[0035] According to another aspect of the present invention, after the step of controlling the drive member to drive each first impeller to rotate according to the steering information to adjust the tilt angle information of the floating support foundation to a preset range, the control method further includes:

[0036] Obtain the current power information of the wind turbine generator set;

[0037] If the current power information is continuously less than the first threshold within a preset time period, the first impeller in the stabilizing device connected to the floating column is controlled to reverse, so that the tilt angle information of the floating support foundation is brought to the preset range.

[0038] According to another aspect of the present invention, after the step of controlling the drive member to drive each first impeller to rotate according to the steering information to adjust the tilt angle information of the floating support foundation to a preset range, the control method further includes:

[0039] Obtain the current power information of the wind turbine generator set;

[0040] If the current power information remains below the first threshold for a preset time period, the rotational speed of the first impeller in the stabilizing device connected to the second floating column will be reduced.

[0041] The first impeller of each stabilizing device is retracted and its rotation is stopped in order to adjust the floating support foundation to return to its initial state.

[0042] According to embodiments of the present invention, the floating support foundation, wind turbine generator set, and control method include a floating body and a stabilizing device. The floating body includes n floating columns, which are spaced apart from each other around a first axis. Adjacent floating columns are connected by a connector, resulting in good integrity and high strength of the floating body. One of the n floating columns is a first floating column used to support the tower, and the rest are second floating columns used to cooperate with the first floating column to support the tower.

[0043] Each second floating column is equipped with a stabilizing device, which includes a drive unit, a first impeller, and a base connected to the second floating column. The base has an inner cavity and a first and a second opening communicating with the inner cavity. The first opening, the inner cavity, and the second opening form a seawater flow channel. The first impeller is located in the inner cavity. The drive unit drives the first impeller to rotate, causing seawater to flow within the flow channel. Under the action of the flowing seawater, the corresponding second floating column can float or sink, thereby achieving attitude adjustment of the entire floating support foundation and ensuring the power generation efficiency of the wind turbine generator. Furthermore, by using the stabilizing device with the above-described structure to achieve attitude adjustment, each second floating column can be adjusted independently without the need for connecting pipes, valve groups, or other connections. The structure is simple and low-cost. Moreover, it only requires controlling the rotation of the first impeller, resulting in a fast response speed. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the structure of a wind turbine generator set according to an embodiment of the present invention;

[0045] Figure 2 This is a schematic diagram of the degrees of freedom of motion of a floating support foundation according to an embodiment of the present invention;

[0046] Figure 3 This is a schematic diagram of the structure of a floating support foundation according to an embodiment of the present invention;

[0047] Figure 4 This is a schematic diagram of the structure of the second floating column and the stabilizing device in one embodiment of the present invention;

[0048] Figure 5 This is a schematic diagram of the structure of the second floating column and the stabilizing device in another embodiment of the present invention;

[0049] Figure 6 This is a flowchart illustrating a control method according to an embodiment of the present invention;

[0050] Figure 7 This is a control logic diagram of a control method according to an embodiment of the present invention;

[0051] Figures 8 to 11 This is a schematic diagram of different incoming airflow directions according to an embodiment of the present invention.

[0052] 100-Wind turbine body; 10-Tower; 20-Nacelle; 30-Generator; 40-Wind rotor; 41-Hub; 42-Blade; 50-Mooring system; 60-Seabed;

[0053] 200-Floating support foundation;

[0054] 210 - Floating column; 211 - First floating column; 212 - Second floating column; 212a - Second upper floating column; 212b - Second lower floating column; 2121 - Bottom wall; 2122 - Hollow cavity;

[0055] 220 - Connector;

[0056] 300-stabilizing device;

[0057] 310 - Base; 311 - End wall; 312 - Side wall; 310a - Inner cavity; 310b - First opening; 310c - Second opening;

[0058] 320 - Drive component; 321 - Drive motor; 322 - Gearbox; 323 - Drive shaft; 324 - Rotor; 325 - Stator;

[0059] 330 - First impeller; 331 - First hub; 332 - First blade;

[0060] 340 - Rectifier; 341 - Second hub; 342 - Second blade;

[0061] W - First direction. Detailed Implementation

[0062] The features and exemplary embodiments of various aspects of the present invention will now be described in detail. Numerous specific details are set forth in the following detailed description in order to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. In the accompanying drawings and the following description, at least some well-known structures and techniques have not been shown in order to avoid unnecessarily obscuring the invention; and, for clarity, the dimensions of some structures may be exaggerated. Furthermore, the features, structures, or characteristics described below may be combined in any suitable manner in one or more embodiments.

[0063] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structures of the floating support foundation, wind turbine generator, and control method of the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0064] like Figure 1As shown in the illustration, this application provides a wind turbine generator set, including a floating support 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 floating support foundation 200, the nacelle 20 is located at the top of the tower 10, and the generator 30 is located in the nacelle 20. In some examples, the generator 30 may be located outside the nacelle 20; in other examples, the generator 30 may be located inside the nacelle 20. The rotor 40 includes a hub 41 and multiple blades 42 connected to the hub 41. The rotor 40 is connected to the rotor of the generator 30 through the hub 41, thereby driving the rotor to rotate relative to the stator, thus meeting the power generation requirements of the wind turbine generator set. The floating support foundation 200 floats in seawater. To limit its range of motion, it is fixed to the seabed 60 by a mooring system 50, thereby constraining its range of motion.

[0065] Because floating wind turbines differ significantly from onshore and offshore monopile wind turbines, they have unique floating bodies and mooring systems in terms of overall system composition.

[0066] like Figure 2 As shown, from the perspective of external loads, the floating support foundation 200 as a whole faces wind loads, wave loads, ocean current loads, ice loads, etc. From the perspective of overall dynamics, due to the "floating" characteristic of the floating wind turbine, the floating support foundation and the wind turbine on which it is located have six degrees of freedom in all directions. The three translational degrees of freedom include: sway, roll, and heave. The three rotational degrees of freedom include: roll, pitch, and yaw. Under the input of external random loads and the coupling effect of multiple systems of the unit, the motion characteristics and mechanism of the floating wind turbine become more complex.

[0067] Continue reading Figure 2 As shown, the motion stability of a floating wind turbine is one of the most important indicators to ensure continuous, stable, safe, and efficient power output and to guarantee power generation. However, while the rotor captures wind energy to generate rotational mechanical energy, it also simultaneously generates thrust in the same direction as the incoming wind. This force is transmitted to the floating support foundation 200, causing the wind turbine to... Figure 2 The rotation direction of the y-axis will produce an elevation angle, which will cause the impeller of the wind turbine to form an angle with the direction of the incoming wind. According to equation (1), the power generation P is proportional to A. The existence of the elevation angle will cause A to decrease, which in turn will lead to a decrease in the power generation of the unit.

[0068] (1)

[0069] To improve the stability of floating wind turbine generators, a ballast control system (i.e., floating support foundation) for floating wind turbine platforms has been proposed. This system consists of multiple internal volumetric stabilizing supports for ballast (water) and a control system. Based on the incoming wind and the turbine's attitude, the ballast loads on these multiple stabilizing supports are adjusted and controlled to ensure the turbine rotor faces the wind, reducing power generation loss. This system enables attitude control of the floating wind turbine generator, thereby optimizing the overall power generation.

[0070] However, in the implementation and application process, although this type of floating support foundation can improve the stability of floating wind turbine generators to a certain extent, it requires a large number of pump sets (several thousand cubic meters / hour), pipelines, valves and other supporting hardware to ensure the mutual linkage and adjustment of ballast water between multiple internal volume stabilizing pillars used to accommodate ballast (water) based on the incoming wind speed and the attitude of the unit. This makes the structure complex on the one hand, and on the other hand, it places high demands on the reliability and redundancy design of the system. If any component in the system fails, it will affect the performance and safety of the whole machine, and the cost is very high.

[0071] Meanwhile, from another perspective, the ballast water regulation speed between different stable supports through pump sets and pipeline types is particularly slow, generally between half an hour and an hour. The system's response speed determines that the unit cannot match the incoming airflow and wave loads in the optimal manner in most scenarios.

[0072] like Figure 3 as well as Figure 4 As shown, based on this, this application embodiment provides a new floating support foundation 200, which can be set in seawater and used to support the tower 10. The floating support foundation 200 includes a floating body and a stabilizing device 300. The floating body includes n floating columns 210 spaced apart from each other with a first axis as the center and a connecting body 220 connecting each two adjacent floating columns 210, where n≥3. The n floating columns 210 include a first floating column 211 and n-1 second floating columns 212. The first floating column 211 is used to connect to and support the tower 10. Each second floating column 212 is connected to a stabilizing device 300. The stabilizing device 300 includes a driving component 320, a first impeller 330, and a base 310 connected to the second floating column 212. The base 310 has an inner cavity 310a and a first opening 310b and a second opening 310c communicating with the inner cavity 310a. The first opening 310b, the inner cavity 310a, and the second opening 310c form a seawater flow channel. The first impeller 330 is disposed in the inner cavity 310a. The driving component 320 drives the first impeller 330 to rotate and drive the seawater to flow in the flow channel to adjust the second floating column 212 connected to the stabilizing device 300 to float or sink.

[0073] The value of n can be 3, 4, 5, or even more. The line connecting the centers of all floating pillars 210 can form a triangle, quadrilateral, pentagon, etc., and can be a regular polygon. The center of each floating pillar 210 is located at the vertex of the polygon.

[0074] For example, when n is 3, the line connecting the centers of all floating pillars 210 forms a triangle, which can be an equilateral triangle. When n is 4, the line connecting the centers of all floating pillars 210 forms a quadrilateral, which can be a regular quadrilateral. When n is 5, the line connecting the midlines of all floating pillars 210 forms a pentagon, which can be a regular pentagon.

[0075] Each floating column 210 can be cylindrical in shape. In the direction perpendicular to the sea level, or in the direction of extension of the tower 10, the orthographic projection shape of the floating column 210 can be a regular geometric shape. The center line connecting the centers of each floating column 210 can also be understood as the center line connecting the orthographic projections of each floating column 210 forming a polygon.

[0076] Optionally, the orthographic projection shape of the floating column 210 in the direction perpendicular to the sea level can be a circle, an ellipse, or a polygon. When it is a polygon, it can be a regular polygon.

[0077] Sea level can be understood as the surface of seawater in a calm state, unaffected by wind and waves.

[0078] The connector 220 can take the form of a connecting rod, a connecting plate, or other structural forms. A connector 220 can be connected between two adjacent floating columns 210. The connector 220 and the floating column 210 can be connected by fasteners or by an integrated structure.

[0079] The n floating columns 210 can be spaced apart and evenly arranged with the first axis as the center. A connecting body 220 can be connected between each two adjacent floating columns 210, and the extension length of each connecting body 220 between the two adjacent floating columns 210 can be equal.

[0080] The first impeller 330 is disposed in the inner cavity 310a of the base 310 and has rotational freedom relative to the base 310 and does not interfere with the side wall 312 of the base 310. The driving component 320 can be disposed in the inner cavity 310a and connected to the base 310. Of course, the driving component 320 can also be partially disposed in the floating column 210, both of which can ensure the driving of the first impeller 330.

[0081] The stabilizing device 300 can be installed on one side of the second floating column 212 in the first direction W. The first opening 310b and the second opening 310c can have a height difference in the first direction W, so that the seawater can drive the second floating column 212 to float or sink in the first direction W when it flows. The first direction W can be selected as the axial direction of the second floating column 212.

[0082] The base 310 of the stabilizing device 300 can be a closed cylindrical structure, or it can be a cylindrical structure with an opening, with the opening closed by the bottom wall 2121 of each of the connected second floating columns 212.

[0083] The floating support foundation 200 provided in this embodiment includes n floating columns 210. The n floating columns 210 are spaced apart from each other with a first axis as the center, and adjacent floating columns 210 are connected by a connector 220, which makes the floating body have good integrity and high strength. One of the n floating columns 210 is a first floating column 211 used to support the tower 10, and the rest are second floating columns 212 used to cooperate with the first floating column 211 to support the tower 10. Since each second floating column 212 is connected to a stabilizing device 300, and the stabilizing device 300 includes a driving component 320, a first impeller 330, and a base 310 connected to the second floating column 212, the base 310 has an inner cavity 310a and a first opening 310b and a second opening 310c communicating with the inner cavity 310a. The first opening 310b, the inner cavity 310a, and the second opening 310c form a seawater flow channel. The first impeller 330 is disposed in the inner cavity 310a. The driving component 320 drives the first impeller 330 to rotate and drive the seawater to flow in the flow channel. Under the action of the flowing seawater, the corresponding second floating column 212 can float or sink, thereby realizing the attitude adjustment of the entire floating support foundation 200 and ensuring the power generation efficiency of the wind turbine generator.

[0084] Furthermore, by setting up the stabilizing device 300 with the above-mentioned structure, attitude adjustment is achieved, so that each of the second floating columns 212 can be adjusted independently, without the need for connecting pipes, valve groups, etc. between them. The structure is simple and the cost is low.

[0085] Meanwhile, the floating support foundation 200 provided in this application embodiment can adjust its attitude by simply controlling the rotation of the first impeller 330 of the stabilizing device 300 at the corresponding position when external factors such as incoming wind cause the floating support foundation 200 to tilt. This instantaneous response eliminates the need to wait between half an hour and an hour. The system's response speed ensures that the unit cannot match the incoming wind and wave loads in the optimal attitude in most scenarios, thus guaranteeing the power generation efficiency of the wind turbine unit where the floating support foundation 200 is located.

[0086] In some optional embodiments, the base 310 is cylindrical in shape and has an end wall 311 disposed opposite to the bottom wall 2121 of the second floating column 212 in a first direction W, and a side wall 312 disposed around the end wall 311. The end wall 311 and the side wall 312 enclose an inner cavity 310a. The bottom wall 2121 is disposed to close the inner cavity 310a. A first opening 310b is disposed on the end wall 311 and a second opening 310c is disposed on the side wall 312.

[0087] The end wall 311 and the bottom wall 2121 are spaced apart in the first direction W, and their surfaces may intersect or be parallel to each other.

[0088] The side wall 312 is hollow. 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 2121 of the connected second floating column 212.

[0089] The number of first openings 310b can be one, or more than two. When there are more than two, the two or more first openings 310b are spaced apart from each other. Correspondingly, the number of second openings 310c can be one, or more than two. When there are more than two, the two or more second openings 310c can be distributed at intervals around the outer periphery of the sidewall 312.

[0090] The floating support foundation 200 provided in this embodiment has a base 310 in the above-described form. It has a simple structure and can enclose a relatively independent space for the first impeller 330. This allows the first impeller 330 to guide the seawater during rotation, guiding the seawater to flow between the first opening 310b and the second opening 310c. This ensures the floating and sinking requirements of the connected second floating column 212, thereby reliably ensuring the attitude adjustment requirements of the floating support foundation 200 and the tower it supports.

[0091] In some optional embodiments, the floating support base 200 provided in this application has a center line of each floating column 210 forming a regular polygon, and the base 310 of each stabilizing device 300 is coaxially arranged with the connected second floating column 212.

[0092] In other words, the centers of the first floating column 211 and the centers of each of the second floating columns 212 are distributed around the first axis. When two adjacent centers are connected, they form a regular polygon.

[0093] For example, when n=3, the number of first floating pillars 211 is one, and the number of second floating pillars 212 is two, the center lines connecting the two second floating pillars 212 and the center line of one first floating pillar 211 form an equilateral triangle.

[0094] For example, when n=4, there is one first floating pillar 211 and three second floating pillars 212. The lines connecting the centers of the three second floating pillars 212 and one first floating pillar 211 form a regular quadrilateral. Similarly, when n=5, the lines connecting the centers of all floating pillars 210 form a regular pentagon. The specific distribution can be set according to the value of n, and will not be listed here.

[0095] The floating support foundation 200 provided in this embodiment ensures rapid response to the upward and downward movement of each second floating column 212 by making the center line connecting all the floating columns 210 form a regular polygon, and by coaxially arranging the base 310 of each stabilizing device 300 with the connected second floating column 212. Furthermore, the regular polygonal center line ensures the overall stability of the floating body, improving the safety performance of the floating support foundation 200.

[0096] In some alternative embodiments, the floating support foundation 200 provided in this application has a radial dimension of sidewall 312 that first decreases and then increases along the first direction W.

[0097] In other words, the side wall 312 can be in the shape of a waist tube or a dumbbell.

[0098] The floating support foundation 200 provided in this embodiment of the application, through the above-mentioned configuration, facilitates the upward or downward guidance of seawater in the first direction W, ensuring the attitude adjustment requirements of the second floating column 212.

[0099] In some optional embodiments, the floating support base 200 provided in this application embodiment may include a motor and a drive shaft 323. The motor is connected to at least one of the base 310 and the second floating column 212. The motor may be directly or indirectly connected to the drive shaft 323, and the first impeller 330 is connected to the drive shaft 323. The motor may be a direct-drive motor or a doubly-fed motor, etc.

[0100] The drive component 320 adopts the above-described form, which can ensure the drive requirements of the first impeller 330, and has a simple and compact structure that is easy to install.

[0101] In some optional embodiments, the floating support foundation 200 provided in this application includes a drive component 320 comprising a drive motor 321, a gearbox 322, and a drive shaft 323. The input end of the gearbox 322 is connected to the drive motor 321 and the output end is connected to the drive shaft 323. The first impeller 330 is connected to the drive shaft 323.

[0102] The gearbox 322 can employ multi-stage speed change. It connects the drive motor 321 and the drive shaft 323, allowing the kinetic energy of the drive motor 321 to be transmitted to the drive shaft 323. The gearbox 322 can increase or decrease the speed output by the drive motor 321 before transmitting it to the drive shaft 323, ensuring the drive requirements of the drive shaft 323 are met.

[0103] The axis of the drive shaft 323 and the axis of the drive motor 321 can be set to intersect or parallel. If they are set to intersect, the direction can be reversed by the gearbox 322 or an additional reversing structure can be set to ensure the transmission of kinetic energy.

[0104] The floating support base 200 provided in this embodiment uses the aforementioned configuration for its drive component 320, which ensures the drive requirements for the first impeller 330 are met. Furthermore, it allows the first impeller 330 to achieve a higher rotational speed, improving the response rate of the floating support base 200 during attitude adjustments.

[0105] The floating support base 200 provided in this embodiment has a drive component 320 that can be located entirely within the inner cavity 310a of the base 310. The drive motor 321 and gearbox 322 can be supported by a mounting bracket or other structure. This is, of course, one optional embodiment.

[0106] In some optional embodiments, the floating support base 200 provided in this application embodiment has a second floating column 212 with a hollow cavity 2122, a drive motor 321 and a gearbox 322 located in the hollow cavity 2122, a drive shaft 323 inserted into the bottom wall 2121 of the second floating column 212 and connected to the output end of the gearbox 322, and the drive shaft 323 and the bottom wall 2121 are dynamically sealed together.

[0107] Both the drive motor 321 and the gearbox 322 can be supported by the bottom wall 2121.

[0108] Dynamic sealing can be understood as: sealing between relatively moving parts in a machine (or equipment), that is, two parts can move relative to each other while ensuring a seal between them.

[0109] The floating support foundation 200 provided in this embodiment of the application, by giving the second floating column 212 a hollow cavity 2122, provides installation space for the drive motor 321 and gearbox 322, reducing the space occupied by the base 310 and reducing the volume of the base 310. Furthermore, the drive motor 321 and gearbox 322 can provide a certain weight to the second floating column 212, giving it a certain ballast effect and ensuring the stability of the second floating column 212.

[0110] The dynamic seal between the drive shaft 323 and the bottom wall 2121 ensures the rotation of the drive shaft 323, thus driving the first impeller 330. Simultaneously, the dynamic seal maintains the sealing performance of the hollow cavity 2122 of the second floating column 212, preventing seawater from entering and causing corrosion of the second floating column 212, submerging the generator and gearbox, or even affecting the weight of the second floating column 212.

[0111] In some optional embodiments, the floating support base 200 provided in this application includes a first impeller 330 comprising a first hub 331, a plurality of first blades 332, and a pitch system. The first hub 331 is connected to a drive member 320. The plurality of first blades 332 are spaced apart in the circumferential direction of the first hub 331 and connected to the first hub 331 through the pitch system to adjust the pitch angle of the first blades 332.

[0112] The pitch system can adopt the pitch form of a wind turbine rotor, changing the angle of attack of the fluid on the first blade 332 by changing the pitch angle between the first blade 332 and the first hub 331.

[0113] The floating support foundation 200 provided in this application embodiment makes the first impeller 330 include a first blade 332 and a first hub 331, and makes the two rotatably connected by a pitch system, so that the pitch angle of the first blade 332 is adjustable, thereby changing the interaction force with the seawater, so as to control the torque and power captured by the first impeller 330.

[0114] 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 rotate together. One of the inner ring and the outer ring is connected to the first hub 331 and the other is connected 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 realizing pitch control. The power source may include, but is not limited to, an electric motor with a drive wheel, and may be consistent with the pitch control principle of the hub and blades of a wind turbine generator set.

[0115] In some alternative embodiments, the floating support base 200 and stabilizing device 300 provided in this application embodiment further include a rectifier 340 disposed in the inner cavity 310a and connected to the base 310. The rectifier 340 is disposed between the first opening 310b and the first impeller 330 to rectify the flow direction of seawater entering through the first opening 310b.

[0116] The rectifier 340 can be connected to the base 310. The rectifier 340 can be a plate with rectifier holes or an impeller structure.

[0117] The floating support foundation 200 provided in this application embodiment includes a rectifier 340 in the stabilizing device 300. The rectifier 340 can be used to adjust the direction of the incoming seawater flow, so as to avoid the seawater entering from multiple directions and contacting the first impeller 330, which would cause energy loss.

[0118] In some optional embodiments, the floating support base 200 provided in this application includes a flow rectifier 340 comprising a second hub 341 and a plurality of second blades 342. 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. One end of the second blade 342 facing away from the second hub 341 is connected to the base 310, and a flow rectifier hole is formed between two adjacent second blades 342.

[0119] The number of second blades 342 included in the rectifier 340 can be two, three or more, as long as it can ensure the rectification of the incoming seawater and reduce energy loss.

[0120] The floating support foundation 200 and the rectifier 340 provided in this application embodiment adopt the above-described form, which can not only meet the rectification requirements of seawater entering and leaving the sea, but also has a simple structure and good rectification effect.

[0121] It is understood that the floating support foundation 200 provided in the above embodiments of this application are all examples of the driving component 320 including the driving motor 321, the gearbox 322 and the driving shaft 323, etc. These are some optional embodiments, but are not limited to the above methods.

[0122] like Figure 5 As shown, in some embodiments, the drive unit 320 may also include a direct drive motor, which is connected to at least one of the bottom wall 2121 of the second floating column 212 and the base 310 and includes a rotor 324 and a stator 325 that are rotatably engaged. The drive shaft 323 is coaxially arranged with the direct drive motor and connected to the rotor 324.

[0123] The direct-drive motor can be directly connected to the base 310, or it can be connected to the bottom wall 2121 of the second floating column 212. Of course, to ensure the connection strength, it can also be connected to both the base 310 and the bottom wall 2121 at the same time.

[0124] Optionally, the direct drive motor can be located in the inner cavity 310a of the base 310. Of course, when the second floating column 212 has a hollow cavity 2122, the direct drive motor can also be located in the hollow cavity 2122. Optionally, it can be located in the inner cavity 310a of the base 310.

[0125] The wind turbine foundation provided in this application embodiment has a drive component 320 in the form described above, which can also meet the driving requirements of the first impeller 330, thereby ensuring the attitude adjustment requirements of the wind turbine foundation.

[0126] It has all the advantages of the Floating Support Foundation 200, which will not be elaborated here.

[0127] like Figure 6 as well as Figure 7 As shown, on the other hand, embodiments of the present invention also provide a control method for the above-mentioned wind turbine generator set, including:

[0128] S100, Obtain the current power information P of the wind turbine generator set.

[0129] S200. If the current power information continues to exceed the first threshold within a preset time period, the tilt angle information of the floating support foundation 200 is obtained.

[0130] S300 When the tilt angle information exceeds the preset range, the direction of rotation of the first impeller 330 of each stabilizing device 300 is determined according to the direction of the incoming airflow.

[0131] S400: Based on the steering information, the control drive unit 320 drives each first impeller 330 to rotate, so as to adjust the tilt angle information of the floating support base 200 to a preset range.

[0132] In step S100, the current power information of the wind turbine generator set can be obtained directly from its main controller or calculated based on its current rotational speed.

[0133] In step S200, the preset time and the first threshold can be set according to the area where the wind turbine is located and the safety level requirements. For example, the preset time period t can be b=20min, and the first threshold m can be 3000kw. Of course, the above is only an example given according to a model and safety level requirements, and is not limited to the above form.

[0134] In step S300, the attitude of the offshore wind turbine is closely related to the incoming wind and waves. Taking the incoming wind as an example, we can describe the different states of the wind turbine rotor. Combining the shape of the floating support foundation 200 and the state of the turbine rotor, the rotor's motion attitude can be defined as four directions. Different directions determine the direction of thrust and are strongly correlated with the attitude of the floating support foundation 200. Therefore, the steering information of the first rotor 330 of each stabilization device 300 can be determined based on the direction of the incoming wind, the direction of the incoming wind, and the target attitude information when adjusting to the target attitude. The target attitude can be a horizontal attitude or an attitude at a predetermined angle to the horizontal attitude.

[0135] For example, the current state of the floating wind turbine generator can be obtained first through the generator information, such as mooring tension, gravity, floating body bending moment, and buoyancy information. Based on this input, theoretical calculations can be performed to obtain the target attitude information, namely the corresponding center of gravity position and buoyancy position. The adjustment of the two centers can be achieved by rotating the first impeller 330 of each stabilizing device 300. The input for this achievement needs to be combined with the impeller orientation state.

[0136] In step S400, the first impeller 330 can be driven to rotate by controlling the drive component 320 of the stabilizing device 300 connected to each second floating column 212, so that seawater flows in the flow channel, thereby driving the connected second floating columns 212 to float or sink, and realizing the attitude adjustment of the floating support base 200.

[0137] The control method provided in this application embodiment involves a stabilizing device 300 connected to its second floating column 212. Through the above steps, the rotation of the first impeller 330 of the stabilizing device 300 on each second floating column 212 can be controlled to drive seawater to flow in the flow channel, thereby realizing the floating and sinking actions of the second floating column 212 and achieving attitude adjustment of the floating support foundation 200. This allows the wind turbine generator to maintain the optimal output attitude of the unit under complex and uncertain external loads and its own different operating conditions, thus ensuring the output of the wind turbine generator.

[0138] In some optional embodiments, the control method provided in this application includes steering information including forward rotation and reverse rotation.

[0139] When the first impeller 330 of the stabilizing device 300 rotates in the forward direction, the stabilizing device 300 provides an upward driving force to the connected second floating column 212.

[0140] When the first impeller 330 of the stabilizing device 300 rotates in the opposite direction, the stabilizing device 300 provides a sinking driving force to the connected second floating column 212.

[0141] The control method provided in this application embodiment, by making the steering information include forward rotation and reverse rotation, and defining the relationship between forward rotation and reverse rotation corresponding to floating and sinking, can accurately provide steering information according to the direction of incoming wind, thus ensuring the attitude adjustment requirements of the floating support foundation 200.

[0142] In some optional embodiments, the control method provided in this application has two second floating columns 212, that is, n=3. When the tilt angle information exceeds the preset range, the step of determining the turning information of the first impeller 330 of each stabilizing device 300 according to the direction of the incoming airflow includes:

[0143] When the tilt angle information exceeds the preset range, the two stabilizing devices 300 are controlled to rotate synchronously in the forward direction, synchronously in the reverse direction, or one rotates in the forward direction and the other rotates in the reverse direction, based on the angle between the incoming wind direction and the reference wind direction.

[0144] Through the above settings, the attitude adjustment of the floating support foundation 200 under different incoming wind conditions is met by using the synchronous forward rotation, synchronous reverse rotation, or one forward rotation and one reverse rotation of each stabilizing device 300, thereby ensuring the power generation efficiency of the wind turbine generator connected to it.

[0145] For better description, the two second floating pillars 212 above the figure are referred to as the second upper floating pillar 212a, and the one below the figure is referred to as the second lower floating pillar 212b. Connecting bodies 220 are connected between the first floating pillar 211 and the second upper floating pillar 212a and the second lower floating pillar 212b, as well as between the two second upper floating pillars 212a and the second lower floating pillar 212b.

[0146] like Figures 7 to 11 As shown, for example, the tilt angle information includes the tilt angle θ of the floating body relative to the preset reference surface. Based on the environmental input, the power and continuous power generation time of the wind turbine are first determined. When the power of the unit P≥a (e.g., a=3000kW) and the duration t≥b (e.g., b=20min) are satisfied at the same time, the tilt angle θ (θ can be α roll, β pitch, γ yaw) can be measured by a combination of tilt angle sensors. If the angle θ≥c (e.g., c=5°), the stability adjustment calculation module of the floating wind turbine is performed. This module first obtains the current state of the wind turbine through the unit information, such as mooring tension, gravity, floating body bending moment, and buoyancy information. Further theoretical calculations based on this input can obtain the target attitude information, that is, the corresponding center of gravity position and buoyancy position. The adjustment of the two centers can be achieved by the stabilization device 300 connected to the two second floating columns 212. The input for implementation needs to be combined with the rotor orientation state.

[0147] For example, step S300 may include:

[0148] When the tilt angle of the floating support foundation 200 relative to the preset reference surface is greater than the second threshold c, and the angle α between the incoming wind X and the reference wind direction Y is 90°, this is accomplished through the coordinated movement of the stabilizing devices 300 connected to the second upper floating column 212a and the second lower floating column 212b. At this time, the stabilizing devices of the second upper floating column 212a and the second lower floating column 212b need to be activated simultaneously, and the first blades 332 of the stabilizing devices 300 connected to both need to rotate in opposite directions, causing the second upper floating column 212a and the second lower floating column 212b to sink, thus restoring the tilt angle θ to within the preset threshold range.

[0149] When the tilt angle of the floating support foundation 200 relative to the preset reference surface is greater than the second threshold c, and the angle α between the incoming wind X and the reference wind direction Y is 180°, this is accomplished through the coordinated movement of the stabilizing devices 300 connected to the second upper floating column 212a and the second lower floating column 212b. At this time, the stabilizing devices of the second upper floating column 212a and the second lower floating column 212b need to be activated simultaneously, and the first impeller 330 of the stabilizing device 300 connected to the second upper floating column 212a rotates in the opposite direction, causing the second upper floating column 212a to sink, and the first impeller 330 of the second lower floating column 212b to rotate in the forward direction, causing the second lower floating column 212b to float, so that the tilt angle θ returns to the preset threshold range.

[0150] When the tilt angle of the floating support foundation 200 relative to the preset reference surface is greater than the second threshold c, and the angle α between the incoming wind X and the reference wind direction Y is 270°, this is accomplished through the coordinated movement of the stabilizing devices 300 connected to the second upper floating column 212a and the second lower floating column 212b. At this time, the stabilizing devices of the second upper floating column 212a and the second lower floating column 212b need to be activated simultaneously, and the first blades 332 of the stabilizing devices 300 connected to both need to rotate in the positive direction, causing the second upper floating column 212a and the second lower floating column 212b to float upwards, thus restoring the tilt angle θ to within the preset threshold range.

[0151] When the tilt angle of the floating support foundation 200 relative to the preset reference surface is greater than the second threshold c, and the angle α between the incoming wind X and the reference wind direction Y is 360° or 0°, this is accomplished through the coordinated movement of the stabilizing devices 300 connected to the second upper floating column 212a and the second lower floating column 212b. At this time, the stabilizing devices of the second upper floating column 212a and the second lower floating column 212b need to be activated simultaneously, causing the first impeller 330 of the stabilizing device 300 connected to the second upper floating column 212a to rotate in the forward direction, causing the second upper floating column 212a to float upward, and the first impeller 330 of the second lower floating column 212b to rotate in the reverse direction, causing the second lower floating column 212b to sink, so that the tilt angle θ returns to the preset threshold range.

[0152] When the angle α between the incoming wind and the reference wind direction falls within the aforementioned values, the second floating column 212 can be adjusted by combining the two states. Adjusting the rotation of the first impeller 330 of the stabilizing device 300 connected to the second floating column 212 allows the stabilizing devices 300 connected to each second floating column 212 to cooperate and work together to ensure the overall attitude adjustment of the floating support foundation 200, keeping its tilt angle within a preset range, thus ensuring the power generation efficiency of the wind turbine generator.

[0153] In some optional embodiments, the floating support foundation 200 provided in this application embodiment,

[0154] The first impeller 330 includes a first hub 331, a plurality of first blades 332, and a pitch control system. The plurality of first blades 332 are spaced apart circumferentially from the first hub 331 and connected to the first hub 331 via the pitch control system. The control method further includes:

[0155] Based on the height difference between the draft of each of the second floating columns 212 connected to the stabilizing device 300 and the set water surface line, at least one of the following is determined: the rotational speed information of the first impeller 330 and the angle information between the first blade 332 and the first hub 331.

[0156] Based on at least one of the rotation speed information and angle information, the drive unit 320 drives each first impeller 330 to rotate, so as to adjust the tilt angle information of the floating support base 200 to a preset range.

[0157] Optionally, the waterline can be understood as a pre-set line on the second floating column 212, which may be a marked line or the like. The draft can be understood as the position line where the second floating column 212 is submerged relative to the waterline when the floating support base 200 is tilted.

[0158] The control method provided in this application determines the rotational speed information of the first impeller 330 based on the height difference between the draft of each second floating column 212 connected to the stabilizing device 300 and the set water surface line. This method can accurately control the rotational speed of the first impeller 330 of each stabilizing device 300, and can also match the corresponding angle between the first blade 332 and the first hub 331 to quickly adjust the attitude of the floating support foundation 200 and meet the optimal angle requirements of the wind turbine generator set to which it is located.

[0159] Controlling the drive unit 320 to drive each first impeller 330 to rotate based on at least one of the rotation speed information and angle information, and controlling the drive unit 320 to drive each first impeller 330 to rotate based on the direction information can be implemented simultaneously. Of course, the rotation direction can be controlled and adjusted first, and then the rotation speed and rotation angle can be controlled and adjusted to ensure that the attitude adjustment requirements of the floating support foundation 200 are met.

[0160] In some optional embodiments, the control method provided in this application, wherein the rotation angle α of the first blade 332 relative to the first hub 331 satisfies 0°<α≤90°, and the steps of determining at least one of the rotational speed information of the first impeller 330 and the angle information between the first blade 332 and the first hub 331 based on the height difference between the draft of each of the second floating columns 212 connected to the stabilizing device 300 and the set water surface line, include:

[0161] When the height difference H is in the range of 0 < H ≤ h1, the first blade 332 rotates relative to the first hub 331 to a = 90°, or the first blade 332 rotates relative to the first hub 331 to 50° < a ≤ 60°, and the speed of the first impeller 330 is 800 rpm - 1500 rpm.

[0162] 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 first impeller 330 rotates at a speed of 1500rpm-2500rpm.

[0163] When the height difference H is in the range of h2<H≤h3, the first blade 332 rotates relative to the first hub 331 to 0°<a≤20°, and the first impeller 330 rotates at a speed of 2500rpm-3500rpm.

[0164] The control method provided in this application embodiment, through the above settings, can quickly adjust the attitude of the floating support foundation 200 by matching the angle of the first blade 332 relative to the first hub 331 and the rotational speed of the first impeller 330 according to different height differences, so as to meet the optimal angle requirements of the wind turbine generator set to which it is located.

[0165] The specific values ​​of h1, h2, and h3 can be set according to the wind turbine model and the required adjustment accuracy. As long as the attitude adjustment of the wind turbine generator can be guaranteed, it can always be kept at a better working angle.

[0166] In some optional embodiments, the control method provided in this application, after step S400, further includes:

[0167] Obtain the current power information of the wind turbine generator set;

[0168] If the current power information is continuously less than the first threshold within a preset time period, the first impeller 330 in the stabilizing device 300 connected to the floating column 210 is controlled to reverse, so that the tilt angle information of the floating support base 200 is within the preset range.

[0169] The initial state can be understood as the state before the tilt angle information exceeds the preset range.

[0170] In some alternative embodiments, based on the impeller being in an azimuth state, the rotational speed of the first impeller 330 of each stabilizing device 300 can be reduced first, then the first blade 332 can be retracted (back to 90°), and finally the power source can be cut off to shut down the movement of the first blade 332 until the floating support base 200 enters the reset state.

[0171] For example, when the angle α between the incoming wind X and the reference wind direction Y is 90°, the restoration of the initial state can be achieved through the coordinated movement of the stabilizing devices 300 connected to the second upper floating column 212a and the second lower floating column 212b. At this time, the stabilizing devices of the second upper floating column 212a and the second lower floating column 212b need to be activated simultaneously, and the first blades 332 of the stabilizing devices 300 connected to both need to rotate in the positive direction, causing the second upper floating column 212a and the second lower floating column 212b to float upwards, thus restoring the tilt angle θ to within the preset threshold range.

[0172] Of course, when the angle α between the incoming wind X and the reference wind direction Y is 90°, when restoring the initial state, the rotational speed of the first impeller 330 of the stabilizing device 300 connected to the second upper floating column 212a and the second lower floating column 212b can be reduced, and then the first blade 332 can be retracted (back to 90°), and finally the power source can be cut off, the movement of the first blade 332 can be stopped, until the wind turbine generator enters the reset state.

[0173] The operation methods for other orientation states are the same as above, and will not be repeated here.

[0174] The wind turbine generator set provided in this application embodiment also includes a controller, which is configured to acquire the current power information of the wind turbine generator set; if the current power information continuously exceeds a first threshold within a preset time period, the controller acquires the tilt angle information of the floating support foundation 200; when the tilt angle information exceeds a preset range, the controller determines the turning information of the first impeller 330 of each stabilizing device 300 according to the direction of the incoming wind; and controls the drive unit 320 to drive each first impeller 330 to rotate according to the turning information, so as to adjust the tilt angle information of the floating support foundation 200 to the preset range.

[0175] Optionally, the controller can be configured to execute the steps corresponding to the control methods provided in the above embodiments. Further details will not be elaborated here.

[0176] The controller of the wind turbine generator set provided in this application embodiment can be a separately set control cabinet, or it can be integrated into the main control unit of the wind turbine generator set.

[0177] The wind turbine generator set provided in this application embodiment 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 floating support foundation 200. It can control and adjust the corresponding stabilization device 300 according to the incoming wind, the current attitude and the target attitude, so as to ensure the overall power generation efficiency of the wind turbine generator set.

[0178] Although the invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A floating support foundation, capable of being installed in seawater and used to support a tower, characterized in that, The floating support foundation includes: The floating body includes n floating columns spaced apart from each other with a first axis as the center, and a connecting body connecting each two adjacent floating columns, where n≥3. The n floating columns include one first floating column and n-1 second floating columns. The first floating column is used to connect to and support the tower. The stabilizing device is connected to each of the second floating columns. The stabilizing device includes a driving component, a first impeller, and a base connected to the second floating column. The base has an inner cavity and a first opening and a second opening communicating with the inner cavity. The first opening, the inner cavity, and the second opening form a flow channel for the seawater. The first impeller is disposed in the inner cavity. The driving component drives the first impeller to rotate and causes the seawater to flow in the flow channel, thereby adjusting the second floating column connected to the stabilizing device to float or sink.

2. The floating support foundation according to claim 1, characterized in that, The base is cylindrical in shape and has an end wall that is disposed opposite to the bottom wall of the second floating column in a first direction and a side wall that surrounds the end wall. The end wall and the side wall enclose the inner cavity. The bottom wall closes the inner cavity. The first opening is disposed on the end wall and the second opening is disposed on the side wall.

3. The floating support foundation according to claim 2, characterized in that, The center line connecting all the floating columns forms a regular polygon, and the base of each stabilizing device is coaxially arranged with the second floating column to which it is connected.

4. The floating support foundation according to claim 2, characterized in that, Along the first direction, the radial dimension of the sidewall first decreases and then increases.

5. The floating support foundation according to claim 1, characterized in that, The driving component includes a drive motor, a gearbox, and a drive shaft. The input end of the gearbox is connected to the drive motor, and the output end is connected to the drive shaft. The first impeller is connected to the drive shaft.

6. The floating support foundation according to claim 5, characterized in that, The second floating 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 of the second floating column and connected to the output end of the gearbox, and the drive shaft is dynamically sealed to the bottom wall.

7. The floating support foundation according to claim 1, characterized in that, The driving component includes a direct drive motor and a drive shaft. The direct drive motor is connected to at least one of the bottom wall of the second floating column and the base and includes a rotor and a stator that are rotatably engaged. The drive shaft is coaxially arranged with the direct drive motor and connected to the rotor. The first impeller is connected to the drive shaft.

8. The floating support foundation according to claim 1, characterized in that, The first impeller includes a first hub, a plurality of first blades, and a pitch system. The first hub is connected to the drive component. 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.

9. The floating support foundation according to claim 1, characterized in that, The stabilizing device further includes a flow straightener disposed in the inner cavity and connected to the base. The flow straightener is disposed between the first opening and the first impeller to straighten the flow direction of the seawater entering through the first opening.

10. The floating support foundation according to claim 9, characterized in that, The rectifier includes a second hub and a plurality of second blades. The plurality of second blades are spaced apart in the circumferential direction of the second hub and connected to the second hub. The end of the second blade facing away from the hub is connected to the base. A rectifier hole is formed between two adjacent second blades.

11. A wind turbine generator set, characterized in that, include: The floating support foundation as described in any one of claims 1 to 10; The wind turbine body is mounted on the first floating column. The wind turbine body includes a tower connected to the first floating column, a nacelle mounted on the tower, and an impeller mounted on the nacelle.

12. The wind turbine generator set according to claim 11, characterized in that, It also includes a controller, which is configured to: Obtain the current power information of the wind turbine generator set; if the current power information continues to exceed a first threshold within a preset time period, obtain the tilt angle information of the floating support foundation; when the tilt angle information exceeds a preset range, determine the steering information of the first impeller of each of the stabilizing devices according to the direction of the incoming wind. The steering information is used to control the drive unit to drive each of the first impellers to rotate, so as to adjust the tilt angle information of the floating support foundation to the preset range.

13. A control method for a wind turbine generator set as described in claim 11, characterized in that, include: Obtain the current power information of the wind turbine generator set; If the current power information continues to exceed the first threshold within a preset time period, the tilt angle information of the floating support foundation is obtained. When the tilt angle information exceeds the preset range, the direction of rotation of the first impeller of each of the stabilizing devices is determined according to the direction of the incoming airflow. The steering information is used to control the drive unit to drive each of the first impellers to rotate, so as to adjust the tilt angle information of the floating support foundation to the preset range.

14. The control method according to claim 13, characterized in that, The steering information includes both forward and reverse rotation; When the first impeller of the stabilizing device rotates in the forward direction, the stabilizing device provides an upward driving force to the connected second floating column; When the first impeller of the stabilizing device rotates in the reverse direction, the stabilizing device provides a sinking driving force to the connected second floating column.

15. The control method according to claim 14, characterized in that, The number of the second floating columns is two. The step of determining the direction of rotation of the first impeller of each stabilizing device according to the incoming wind direction when the tilt angle information exceeds a preset range includes: When the tilt angle information exceeds the preset range, the two stabilizing devices are controlled to rotate synchronously in the forward direction, synchronously in the reverse direction, or one rotates in the forward direction and the other rotates in the reverse direction, according to the angle between the incoming wind direction and the reference wind direction.

16. The control method according to claim 13, wherein the first impeller includes a first hub, a plurality of first blades, and a pitch system, the plurality of first blades being spaced apart circumferentially on the first hub and connected to the first hub via the pitch system, the method further comprising: The rotational speed of the first impeller and the angle between the first blade and the first hub are determined based on the height difference between the draft of each of the second floating columns connected to the stabilizing device and the set water surface line. Based on at least one of the rotational speed information and the angle information, the driving component is controlled to drive each of the first impellers to rotate, so as to adjust the tilt angle information of the floating support foundation to the preset range.

17. The control method according to claim 16, characterized in that, The rotation angle α of the first blade relative to the first hub satisfies 0°<a≤90°. The step of determining at least one of the rotational speed information of the first impeller and the angle information between the first blade and the first hub based on the height difference between the draft of each of the second floating columns connected to the stabilizing device and the set water surface line includes: When the height difference H is in the range of 0 < H ≤ h1, the first blade rotates relative to the first hub to a = 90°, or the first blade rotates relative to the first hub to 50° < a ≤ 60°, and the speed of the first impeller is 800 rpm - 1500 rpm. When the height difference H is in the range of h1<H≤h2, the first blade rotates relative to the first hub to 30°<a≤50°, and the first impeller speed is 1500rpm-2500rpm. When the height difference H is in the range of h2<H≤h3, the first blade rotates relative to the first hub to 0°<a≤20°, and the first impeller speed is 2500rpm-3500rpm.

18. The control method according to claim 13, characterized in that, After the step of controlling the drive component to drive each of the first impellers to rotate according to the steering information to adjust the tilt angle information of the floating support foundation to the preset range, the control method further includes: Obtain the current power information of the wind turbine generator set; If the current power information is continuously less than the first threshold within a preset time period, the first impeller in the stabilizing device connected to the floating column is controlled to reverse, so that the tilt angle information of the floating support foundation is within the preset range. or, Obtain the current power information of the wind turbine generator set; If the current power information remains below the first threshold for a preset time period, the rotational speed of the first impeller in the stabilizing device connected to the second floating column is reduced. The first impeller of each of the stabilizing devices is retracted and its rotation is stopped to adjust the floating support foundation back to its initial state.

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