Wind turbine generator set and control method thereof

Abstract

This invention relates to a wind turbine generator set and its control method. The wind turbine generator set includes a wind turbine body, comprising an impeller, a generator, and a first converter; an energy storage and vibration damping device, comprising a base, a mounting frame, a rotating disk, and a power converter; and a controller. The controller acquires the difference between the actual output power of the wind turbine body and the target power of the power grid, as well as the vibration acceleration of the wind turbine body. When the absolute value of the difference is greater than zero, the controller controls the energy storage and vibration damping device to be in either a charging or discharging state. In the charging state, the power converter drives the rotating disk to rotate and store electrical energy; in the discharging state, the rotating disk drives the power converter to rotate and release electrical energy. When the absolute value of the difference is equal to zero, the controller controls the power converter to drive the rotating disk to rotate relative to the mounting frame to a predetermined speed based on the vibration acceleration, thereby suppressing the vibration of the wind turbine body. This invention integrates energy storage and vibration damping functions, is low-cost, and has a competitive advantage in the market.

Description

Technical Field

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

[0002] Currently, the power grid demands that renewable energy sources possess certain primary and secondary frequency regulation capabilities, creating a need for energy storage systems for both wind farms and individual wind turbines. This demand places higher requirements on the levelized cost of electricity (LCOE) of wind turbine generators. Against this backdrop, turbines are trending towards larger rotors and highly flexible, lightweight towers, resulting in a continuous reduction in the unit power weight of the entire unit. However, this has led to a series of concerning issues related to structural vibration, stability, and safety. Various excitation sources during wind turbine operation, including external and internal excitations such as uncertain external wind loads, unpredictable waves, ocean currents, rotor imbalance, and rotor rotation, can cause various uncertainties and abnormal behaviors in the unit's operating characteristics. The most direct response is turbine vibration, and in recent years, amidst continuous forced installations and price wars, turbine safety accidents have become increasingly prominent.

[0003] Existing wind turbine energy storage systems typically configure corresponding electrochemical energy storage devices, such as lithium batteries and lead-acid batteries, according to the load ratio. They also achieve overall damping and vibration suppression by adding tuned mass dampers or tuned liquid dampers, resulting in higher costs for wind turbines and reduced competitive advantage. Summary of the Invention

[0004] This invention provides a wind turbine generator set and its control method. The wind turbine generator set integrates energy storage and vibration damping functions, is low in cost, and has a higher market competitiveness.

[0005] On one hand, according to an embodiment of the present invention, a wind turbine generator set is provided, comprising: a wind turbine body, including an impeller, a generator, and a first converter, wherein the generator is connected between the impeller and the first converter, and the first converter is used to connect to the power grid; an energy storage and vibration damping device, disposed on the wind turbine body, including a base, a mounting frame, a rotating disk, and a power converter, wherein the power converter is connected to the mounting frame and can drive the rotating disk to rotate relative to the mounting frame about a first axis as the rotation center, and the mounting frame is rotatably connected to the base and can rotate relative to the base about a second axis as the rotation center, wherein the first axis and the second axis are... The controller acquires the difference between the actual output power of the wind turbine and the target power of the power grid, as well as the vibration acceleration of the wind turbine. When the absolute value of the difference is greater than zero, the controller controls the energy storage and vibration suppression device to be in either a charging or discharging state. In the charging state, the power converter drives the rotating disk to rotate and store electrical energy. In the discharging state, the rotating disk drives the power converter to rotate and release electrical energy. When the absolute value of the difference is equal to zero, the controller controls the power converter to drive the rotating disk to rotate relative to the mounting frame to a predetermined speed according to the vibration acceleration, so as to suppress the vibration of the wind turbine.

[0006] According to one aspect of the present invention, the energy storage vibration suppression device further includes a second converter, which is connected between the power converter and the output terminal of the first converter.

[0007] According to one aspect of the present invention, the number of energy storage vibration damping devices is two or more, the two or more energy storage vibration damping devices are arranged in parallel with each other and are all connected to the output terminal of the first converter, and the controller determines the number of energy storage vibration damping devices in the charging state or the discharging state according to the value of the difference.

[0008] According to one aspect of the present invention, the wind turbine body further includes a wind turbine foundation, a tower, and a nacelle. The tower is connected to the wind turbine foundation, the nacelle is disposed on the tower, and the impeller, generator, and first converter are all disposed on the nacelle. An energy storage and vibration damping device is disposed on at least one of the wind turbine foundation, the tower, and the nacelle.

[0009] According to one aspect of the present invention, the controller is configured to:

[0010] Fourier transform of the time-domain data of vibration acceleration yields the spectral data of vibration acceleration;

[0011] The power converter is controlled to drive the rotating disk to a predetermined speed based on the spectral data of vibration acceleration.

[0012] According to one aspect of the present invention, the nacelle is provided with two or more energy storage vibration damping devices; or, the nacelle is provided with at least one energy storage vibration damping device, and the tower is provided with at least one energy storage vibration damping device located at the top of the tower near the nacelle; or, the tower is provided with two or more energy storage vibration damping devices near the top of the nacelle, the two or more energy storage vibration damping devices are distributed at intervals along the circumference of the tower and the height of each energy storage vibration damping device is the same.

[0013] According to one aspect of the present invention, the spectral data of vibration acceleration includes first-order spectral data of the nacelle and the tower as a whole in a first direction and first-order spectral data in a second direction; at least one of the two or more energy storage vibration damping devices has a second axis extending along the first direction and at least one of the second axes extending along the second direction, the first direction and the second direction being intersected, and the controller is configured to:

[0014] When the values ​​of the first-order spectrum data in the first direction and the first-order spectrum data in the second direction are both less than or equal to the w value, the power converter of each energy storage vibration damping device is stopped, so that the rotation speed of each rotating disk relative to the mounting frame is 0.

[0015] When at least one of the first-order spectrum data in the first direction and the first-order spectrum data in the second direction is greater than w and less than or equal to p, the power converter driving the rotating disk of at least one energy storage vibration damping device rotates at a first speed.

[0016] When at least one of the first-order spectrum data in the first direction and the first-order spectrum data in the second direction is greater than p, the power converter driving the rotating disk of at least one energy storage and vibration damping device rotates at a second speed, which is greater than the first speed.

[0017] According to one aspect of the present invention, the tower is provided with two or more energy storage vibration damping devices, and the two or more energy storage vibration damping devices are respectively configured as two groups and distributed at intervals along the axial direction of the tower. Each group includes at least two energy storage vibration damping devices, and the energy storage vibration damping devices in the same group are distributed at intervals along the circumferential direction of the tower.

[0018] According to one aspect of the present invention, the spectral data of vibration acceleration includes first-order and second-order spectral data of the nacelle and the tower as a whole in a first direction, and first-order and second-order spectral data in a second direction. At least one of two or more energy storage vibration damping devices located on the tower has its second axis extending along the first direction, and at least one of their second axes extending along the second direction, with the first and second directions intersecting. The controller is configured to:

[0019] When the first-order and second-order spectrum data in the first direction and the first-order and second-order spectrum data in the second direction are all less than or equal to the w value, the power converter of each energy storage vibration damping device on the control tower stops, so that the rotation speed of each rotating disk relative to the mounting frame is 0.

[0020] When at least one of the first-order spectrum data and second-order spectrum data in the first direction and the first-order spectrum data and second-order spectrum data in the second direction is greater than w and less than or equal to p, the power converter of at least one energy storage vibration damping device on the control tower drives the rotating disk to rotate at the first speed.

[0021] When at least one of the first-order spectrum data and second-order spectrum data in the first direction and the first-order spectrum data and second-order spectrum data in the second direction is greater than p, at least one power converter on the control tower drives the rotating disk to rotate at a second speed, which is greater than the first speed.

[0022] According to one aspect of the present invention, at least two energy storage vibration damping devices are provided on the foundation of the wind turbine, the spectral data of the vibration acceleration includes the vibration acceleration of the floating body, and the controller is configured to control the power converter drive rotating disk of at least one vibration damping device on the foundation of the wind turbine to rotate to a predetermined speed according to the vibration acceleration of the floating body.

[0023] According to one aspect of the present invention, the wind turbine foundation includes a plurality of floating bodies and a connecting body. The plurality of floating bodies are spaced apart from each other and the center line connecting the floating bodies forms a polygon. Adjacent floating bodies are connected by a connecting body. The tower is connected to one of the floating bodies, and energy storage and vibration damping devices are connected to the remaining floating bodies.

[0024] According to one aspect of the present invention, there are three floating bodies and the center lines connecting them form a triangle. One of the floating bodies is connected to the tower, and the remaining two floating bodies are each connected to an energy storage and vibration damping device. The second axes of the two energy storage and vibration damping devices are intersecting.

[0025] According to one aspect of the present invention, in two energy storage vibration damping devices located on a wind turbine foundation, the second axis of one extends along a first direction and the second axis of the other extends along a second direction, the first direction and the second direction being perpendicular to each other; the vibration acceleration of the floating body includes a first-direction rotational acceleration about the first direction and a second-direction rotational acceleration about the second direction; the controller is configured to:

[0026] When the first-order spectrum data corresponding to the rotational acceleration in the first direction is less than or equal to m, the rotating disk of the energy storage vibration damping device extending along the first direction on the second axis of the control wind turbine base is stationary, and the rotating disk of the energy storage vibration damping device extending along the second direction on the second axis of the control wind turbine base rotates within the first speed range.

[0027] When the first-order spectrum data corresponding to the rotational acceleration in the first direction is greater than m and less than or equal to L, the rotating disk of the energy storage vibration damping device extending along the second axis of the control fan base in the first direction is stationary, and the rotating disk of the energy storage vibration damping device extending along the second axis of the control fan base in the second direction rotates within the second speed range, where the minimum value of the second speed range is greater than the maximum value of the first speed range.

[0028] According to one aspect of the present invention, the controller is further configured to:

[0029] When the first-order spectrum data corresponding to the second-direction rotational acceleration is less than or equal to m, the rotating disk of the energy storage vibration damping device extending along the second direction on the control wind turbine foundation is stationary, and the rotating disk of the energy storage vibration damping device extending along the first direction on the control wind turbine foundation rotates within the first speed range.

[0030] When the first-order spectrum data corresponding to the rotational acceleration in the second direction is greater than m and less than or equal to L, the rotating disk of the energy storage vibration damping device extending along the second direction on the control wind turbine base is stationary, and the rotating disk of the energy storage vibration damping device extending along the first direction on the control wind turbine base rotates within the second speed range.

[0031] According to one aspect of the present invention, the second axes of the two energy storage vibration damping devices converge at the center of the wind turbine foundation, the buoy vibration acceleration includes a first-direction rotational acceleration about a first direction and a second-direction rotational acceleration, the first direction and the second direction being perpendicular to each other and intersecting the second axis of each energy storage vibration damping device, and the controller is configured to:

[0032] When at least one of the first-order spectrum data corresponding to the rotational acceleration in the first direction and the first-order spectrum data corresponding to the rotational acceleration in the second direction is less than or equal to m, the rotating disks of each energy storage and vibration damping device on the wind turbine foundation rotate within the first speed range.

[0033] When at least one of the first-order spectrum data corresponding to the rotational acceleration in the first direction and the first-order spectrum data corresponding to the rotational acceleration in the second direction is greater than m and less than or equal to n, the rotating disks of each energy storage and vibration damping device on the wind turbine foundation are controlled to rotate within the second speed range, and the minimum value of the second speed range is greater than the maximum value of the first speed range.

[0034] According to one aspect of the present invention, the wind turbine foundation includes a main floating body, a plurality of sub-floating bodies, and a connecting body provided for each sub-floating body. The plurality of sub-floating bodies are distributed at intervals around the main floating body. Each sub-floating body is connected to the main floating body through a corresponding connecting body. The main floating body is connected to the tower. Each sub-floating body is connected to an energy storage vibration damping device.

[0035] According to one aspect of the present invention, there are three sub-floats, and the center lines connecting them form a triangle. The distance from the center of the main float to the center of each sub-float is equal, and the axes of the energy storage and vibration damping devices provided on each sub-float are intersecting.

[0036] According to one aspect of the present invention, the vibration acceleration of the floating body includes a first direction rotational acceleration about a first direction and a second direction rotational acceleration about a second direction, the first direction and the second direction being perpendicular to each other. Three energy storage vibration damping devices respectively include a first vibration damping device, a second vibration damping device, and a third vibration damping device. The second axis of the first vibration damping device extends along the line connecting the centers of the sub-floating bodies where the first and third vibration damping devices are located. The second axis of the second vibration damping device extends along the line connecting the centers of the sub-floating bodies where the second and third vibration damping devices are located. The second axis of the third vibration damping device extends along the second direction. The controller is configured to:

[0037] When the first-order spectrum data corresponding to the rotational acceleration in the first direction is less than or equal to m, the rotating disks of the first and second vibration damping devices are kept stationary and the rotating disks of the third vibration damping device are controlled to rotate within the first speed range.

[0038] When the first-order spectrum data corresponding to the rotational acceleration in the first direction is greater than m and less than or equal to k, the rotating disks of the first and second vibration damping devices are controlled to rotate within the first rotational speed range, and the rotating disks of the third vibration damping device are controlled to rotate within the second rotational speed range, where the minimum value of the second rotational speed range is greater than the maximum value of the first rotational speed range.

[0039] When the first-order spectrum data corresponding to the rotational acceleration in the first direction is greater than k and less than or equal to L, the rotating disks controlling the first, second, and third vibration damping devices all rotate within the second rotational speed range.

[0040] According to one aspect of the present invention, the controller is further configured to:

[0041] When the first-order spectrum data corresponding to the second-direction rotational acceleration is less than or equal to m, the rotating disk of the third vibration damping device is kept stationary, and the rotating disks of the first and second vibration damping devices are controlled to rotate within the first speed range.

[0042] When the first-order spectrum data corresponding to the second-direction rotational acceleration is greater than m and less than or equal to L, the rotating disk of the third vibration damping device is kept stationary, and the rotating disks of the first and second vibration damping devices are both rotated within the second rotational speed range.

[0043] According to one aspect of the present invention, the vibration acceleration of the floating body includes a first direction rotational acceleration about a first direction and a second direction rotational acceleration about a second direction, the first direction and the second direction being perpendicular to each other; the three energy storage vibration damping devices respectively include a first vibration damping device, a second vibration damping device and a third vibration damping device; the second axis of the first vibration damping device extends along the first direction, the second vibration damping device extends along the second direction, and the second axis of the third vibration damping device extends along the line connecting the centers of the sub-floating body where the second vibration damping device is located and the sub-floating body where the third vibration damping device is located; the controller is configured to:

[0044] When the first-order spectrum data corresponding to the rotational acceleration in the first direction is less than or equal to m, the rotating disks of the first and third vibration damping devices are kept stationary, and the rotating disks of the second vibration damping device are controlled to rotate within the first speed range.

[0045] When the first-order spectrum data corresponding to the rotational acceleration in the first direction is greater than m and less than or equal to k, the rotating disk of the first vibration damping device is controlled to remain stationary, the rotating disk of the third vibration damping device is controlled to rotate within the first rotational speed range, and the rotating disk of the second vibration damping device is controlled to rotate within the second rotational speed range, wherein the minimum value of the second rotational speed range is greater than the maximum value of the first rotational speed range.

[0046] When the first-order spectrum data corresponding to the rotational acceleration in the first direction is greater than k and less than or equal to L, the rotating disk of the first vibration damping device is kept stationary, and the rotating disks of the third vibration damping device and the second vibration damping device are controlled to rotate within the second rotational speed range.

[0047] According to one aspect of the present invention, the controller is further configured to:

[0048] When the first-order spectrum data corresponding to the rotational acceleration in the second direction is less than or equal to m, the rotating disks of the second and third vibration damping devices are kept stationary, and the rotating disk of the first vibration damping device is controlled to rotate within the first speed range.

[0049] When the first-order spectrum data corresponding to the second-direction rotational acceleration is greater than m and less than or equal to k, the rotating disk of the second vibration damping device is controlled to remain stationary, the rotating disk of the third vibration damping device is controlled to rotate within the first rotational speed range, and the rotating disk of the first vibration damping device is controlled to rotate within the second rotational speed range.

[0050] When the first-order spectrum data corresponding to the second-direction rotational acceleration is greater than k and less than or equal to L, the rotating disk of the second vibration damping device is kept stationary, and the rotating disks of the third vibration damping device and the first vibration damping device are controlled to rotate within the second rotational speed range.

[0051] On the other hand, according to embodiments of the present invention, a control method for a wind turbine generator set is proposed, comprising:

[0052] Configuration steps: Configure the wind turbine generator set provided in the above embodiments;

[0053] The acquisition steps include obtaining the difference between the actual output power of the wind turbine and the target power of the power grid, as well as the vibration acceleration of the wind turbine.

[0054] The control steps are as follows: when the absolute value of the difference is greater than zero, the energy storage vibration damping device is controlled to be in either a charging state or a discharging state. In the charging state, the power converter drives the rotating disk to rotate and store electrical energy. In the discharging state, the rotating disk drives the power converter to rotate and release electrical energy. When the absolute value of the difference is equal to zero, the power converter drives the rotating disk to rotate relative to the mounting frame to a predetermined speed according to the vibration acceleration, so as to suppress the vibration of the fan body.

[0055] According to another aspect of the present invention, the control step includes:

[0056] When the difference is greater than zero, the energy storage vibration damping device is controlled to be in a charging state, and the power converter drives the rotating disk to rotate and store electrical energy.

[0057] When the difference is less than zero, the energy storage and vibration damping device is controlled to be in a discharge state, and the rotating disk drives the power converter to rotate and release electrical energy.

[0058] According to an embodiment of the present invention, a wind turbine generator set includes a wind turbine body, an energy storage vibration damping device, and a controller. The impeller, generator, and first converter of the wind turbine body can convert wind energy into electrical energy and transmit it to the power grid. The controller can obtain the difference between the actual output power of the wind turbine body and the target power of the power grid. The energy storage vibration damping device includes a base, a mounting frame, a rotating disk, and a power converter. The power converter is connected to the mounting frame and can drive the rotating disk to rotate relative to the mounting frame about a first axis. The mounting frame is rotatably connected to the base and can rotate relative to the base about a second axis. The controller can set the energy storage vibration damping device to a charging state or a discharging state when the absolute value of the difference is greater than 0. In the charging state, the power converter drives the rotating disk to rotate and store energy. In the discharging state, the rotating disk drives the power converter to rotate and release electrical energy. That is to say, the energy storage vibration damping device is used for energy storage. When the absolute value of the difference is zero, the controller controls the power converter drive disk to rotate relative to the mounting frame to a predetermined speed based on the vibration acceleration, thereby suppressing the vibration of the wind turbine body. At this time, the energy storage vibration suppression device is used for vibration suppression. The structural form of the energy storage vibration suppression device allows the wind turbine to integrate energy storage and vibration suppression functions, resulting in low cost and a higher market competitiveness. Attached Figure Description

[0059] The features, advantages and technical effects of exemplary embodiments of the present invention will now be described with reference to the accompanying drawings.

[0060] Figure 1 This is a schematic diagram of the structure of a wind turbine generator set according to an embodiment of the present invention;

[0061] Figure 2 This is a schematic diagram of the electrical drive of a wind turbine generator set according to an embodiment of the present invention;

[0062] Figure 3 This is a schematic diagram of the structure of an energy storage vibration damping device according to an embodiment of the present invention;

[0063] Figure 4 This is a side view of an energy storage vibration damping device according to an embodiment of the present invention;

[0064] Figure 5 This is a schematic diagram of the structure of an energy storage vibration damping device under one working state according to an embodiment of the present invention;

[0065] Figure 6 This is a schematic diagram of the structure of a wind turbine generator set according to another embodiment of the present invention;

[0066] Figure 7 This is a schematic diagram of the structure of the fan body according to another embodiment of the present invention;

[0067] Figure 8 yes Figure 7 A cross-sectional view along the AA direction;

[0068] Figure 9 yes Figure 7 A cross-sectional view along the BB direction;

[0069] Figure 10 This is a schematic diagram of the structure of a wind turbine foundation according to an embodiment of the present invention;

[0070] Figure 11 This is a schematic diagram of the structure of a wind turbine foundation according to another embodiment of this application;

[0071] Figure 12 This is a schematic diagram of the structure of a wind turbine generator set according to another embodiment of the present invention;

[0072] Figure 13 This is a schematic diagram of the structure of a wind turbine foundation according to another embodiment of this application;

[0073] Figure 14 This is a schematic diagram of the structure of a wind turbine foundation according to another embodiment of this application;

[0074] Figure 15 This is a flowchart of a control method for a wind turbine generator set according to an embodiment of this application;

[0075] Figure 16 This is a control logic diagram of a wind turbine generator control method according to an embodiment of this application.

[0076] 100-Wind turbine body; 10-Tower; 20-Nacelle; 30-Generator; 40-Impeller; 50-Mooring system; 60-Seabed; 70-First converter;

[0077] 210 - Energy storage and vibration damping device; 220 - Second converter;

[0078] 210a - First vibration damping device; 210b - Second vibration damping device; 210c - Third vibration damping device; 211 - Base; 211a - Bottom wall; 211b - Side wall; 211c - Cavity; 212 - Mounting bracket; 212a - Hollow cavity; 213 - Rotating disk; 214 - Power converter; 215 - Output shaft; 216 - Connecting shaft;

[0079] 300 - Wind turbine foundation; 300a - Floating body; 310 - Main floating body; 320 - Sub-floating body; 330 - Connecting body; 340 - Reinforcing body;

[0080] 400-Controller;

[0081] 500-Power Grid;

[0082] X - First direction; Y - Second direction; aa - First axis; bb - Second axis.

[0083] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale. Detailed Implementation

[0084] 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.

[0085] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the wind turbine generator set of the present invention. It should also be noted in the description of the present invention 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.

[0086] like Figures 1 to 5 As shown in the figure, this application provides a wind turbine generator set, including a wind turbine body 100, an energy storage and vibration damping device 210, and a controller 400.

[0087] The wind turbine body 100 includes a tower 10, a nacelle 20, a generator 30, an impeller 40, and a first converter 70. The nacelle 20 is located at the top of the tower 10. The generator 30 is located in the nacelle 20 and connected between the impeller 40 and the first converter 70. The first converter 70 is used to connect to the power grid 500. The impeller 40 absorbs external wind energy and converts it into kinetic energy, which drives the generator 30 to rotate. The kinetic energy is converted into electrical energy at the generator 30, and then the electrical energy is rectified and inverted by the first converter 70 before being transmitted to the power grid 500.

[0088] Since the power grid 500 requires primary and secondary frequency regulation for wind turbine generators, a certain capacity energy storage system is required for each wind turbine generator. To meet the primary and secondary frequency regulation requirements of the power grid 500, the energy storage vibration suppression device 210 provided in this embodiment is installed on the wind turbine body 100 and includes a base 211, a mounting frame 212, a rotating disk 213, and a power converter 214. The power converter 214 is connected to the mounting frame 212 and can drive the rotating disk 213 to rotate relative to the mounting frame 212 about a first axis aa as the rotation center. The mounting frame 212 is rotatably connected to the base 211 and can rotate relative to the base 211 about a second axis bb as the rotation center. The first axis aa and the second axis bb intersect.

[0089] The controller 400 is configured to acquire the difference between the actual output power of the wind turbine body 100 and the target power of the power grid 500, as well as the vibration acceleration of the wind turbine body 100. When the absolute value of the difference is greater than zero, the controller 400 controls the energy storage vibration damping device 210 to be in either a charging or discharging state. In the charging state, the power converter 214 drives the rotating disk 213 to rotate and store electrical energy; at this time, the power converter 214 can be used as a motor. In the discharging state, the rotating disk 213 drives the power converter 214 to rotate and release electrical energy; at this time, the energy storage vibration damping device 210 can be used as a generator. Regardless of whether it is in the charging or discharging state, the power converter 214 is used for energy storage. When the absolute value of the difference is equal to zero, the controller 400 controls the power converter 214 to drive the rotating disk 213 to rotate relative to the mounting frame 212 to a predetermined speed according to the vibration acceleration to suppress the vibration of the wind turbine body 100; at this time, the energy storage vibration damping device 210 can be used for vibration damping.

[0090] The energy storage priority of the energy storage vibration damping device 210 is higher than the vibration damping priority. The number of energy storage vibration damping devices 210 can be one, or more than two, depending on the energy storage requirements of the wind turbine generator set.

[0091] The first converter 70 may include an AC to DC conversion unit and a DC to AC conversion unit.

[0092] The wind turbine generator set provided in this application includes a wind turbine body 100, an energy storage and vibration damping device 210, and a controller 400. When the difference between the actual output power of the wind turbine body 100 and the target power of the power grid 500 is greater than zero, the controller 400 controls the energy storage and vibration damping device 210 to be in a charging state, and the power converter 214 is used as a motor to drive the rotating disk 213 to rotate and store electrical energy. When the difference between the actual output power of the wind turbine body 100 and the target power of the power grid 500 is less than zero, the controller 400 controls the energy storage and vibration damping device 210 to be in a discharging state, and the power converter 214 is used as a motor. The rotating disk 213 drives the power converter 214 to rotate and release electrical energy for use by the power grid 500.

[0093] When the absolute value of the difference is zero, that is, when the actual output power of the wind turbine 100 is balanced with the target power of the grid 500, the controller 400 controls the power converter 214 to drive the rotating disk 213 to rotate relative to the mounting frame 212 to a predetermined speed based on the vibration acceleration. Since the rotating disk 213 has a certain mass, it has a large moment of inertia about the rotation axis extending along the first axis aa when driven by the power converter 214 to rotate at high speed. In the inertial space, the first axis aa remains stable and points in a fixed direction. When there is an external disturbance, due to its precession, it will generate a torque perpendicular to the external torque, thereby maintaining the stability of the rotation axis extending along the first axis aa in the inertial space, while suppressing the vibration of the structure and ensuring the safety performance of the wind turbine generator set. In other words, the structure of the energy storage vibration suppression device 210 allows the wind turbine generator set to integrate energy storage and vibration suppression functions, which is low-cost and has a higher market competitiveness.

[0094] In some optional embodiments, the wind turbine generator set provided in this application embodiment, the energy storage and vibration suppression device 210 further includes a second converter 220, which is connected between the power converter 214 and the output terminal of the first converter 70.

[0095] The second converter 220 may include an AC-to-DC unit and a DC-to-AC unit.

[0096] The wind turbine generator set provided in this application embodiment includes a second converter 220 in the energy storage and vibration damping device 210. In the discharge state, the rotating disk 213 drives the power converter 214 to rotate and generate electricity. After frequency regulation by the second converter 220, the electrical energy is supplied to the power grid 500 to compensate for the electrical energy when the actual output power of the wind turbine body 100 does not meet the target power of the power grid 500.

[0097] In some optional embodiments, the second converter 220 of the energy storage vibration damping device 210 can be integrated with the mechanical structures such as the base 211, mounting frame 212, rotating disk 213, and power converter 214. Alternatively, the second converters 220 corresponding to each energy storage vibration damping device 210 can be integrated into a single enclosure for centralized management and protection, improving compactness. Other structures for energy storage and vibration damping of the energy storage vibration damping device 210 can be installed on the wind turbine body 100 or the wind turbine foundation as required.

[0098] In some optional embodiments, the wind turbine generator provided in this application has two or more energy storage vibration suppression devices 210. The two or more energy storage vibration suppression devices 210 are connected in parallel and are all connected to the output terminal of the first converter 70. The controller 400 determines the number of energy storage vibration suppression devices 210 in the charging state or the discharging state according to the difference value.

[0099] The wind turbine generator set provided in this application embodiment, through the above-described configuration, can adjust the number of energy storage and vibration damping devices 210 activated based on the difference between the actual output power of the wind turbine body 100 and the target power of the grid 500. When the actual output power is greater than the target power of the grid 500, the excess power can be matched with a corresponding number of energy storage and vibration damping devices 210 to store the excess electrical energy, thus satisfying the energy storage requirement. Conversely, when the actual output power is less than the target power of the grid 500, the missing power can be matched with a corresponding number of energy storage and vibration damping devices 210 to supplement the electrical energy required by the grid 500. Furthermore, the configuration of two or more energy storage and vibration damping devices 210 allows for synergistic action of multiple energy storage and vibration damping devices 210, thereby optimizing the vibration damping effect.

[0100] like Figures 3 to 5 As shown, in some optional embodiments, the wind turbine generator provided in this application has a base 211 of energy storage vibration damping device 210, which includes a bottom wall 211a and a side wall 211b connected to the bottom wall 211a. The bottom wall 211a and the side wall 211b together enclose a cavity 211c. The mounting bracket 212 extends at least partially into the cavity 211c and is rotatably connected to the side wall 211b through a rotating shaft.

[0101] The cavity 211c of the base 211 can be U-shaped with an opening on one side. Both the bottom wall 211a and the side walls 211b of the base 211 can be regular plate-like structures. For example, both the bottom wall 211a and the side walls 211b of the base 211 can be plate-like structures, with the bottom wall 211a perpendicularly connected to both sides of the second axis bb in the extension direction. The two side walls 211b are symmetrically distributed with respect to the first axis aa.

[0102] The wind turbine generator set provided in this application embodiment has a base 211 of energy storage vibration damping device 210 in the form of a cavity 211c formed by bottom wall 211a and side wall 211b. The structure is simple, and bottom wall 211a facilitates contact with the wind turbine body 100, ensuring stability on the wind turbine body 100. At the same time, the cavity 211c facilitates the insertion of the mounting bracket 212 and the rotational connection between it and the base 211, and makes the energy storage vibration damping device 210 compact, reducing the overall volume occupied, thereby reducing or avoiding the limitation of the installation space of the wind turbine body 100 on the vibration damping device.

[0103] In some optional embodiments, the mounting bracket 212 can be a disc-shaped or polygonal hollow disc structure; when a polygon is used, it can be a regular polygon. The mounting bracket 212 may be provided with a connecting shaft 216 extending along the second axis bb. The mounting bracket 212 is rotatably connected to the base 211 via the connecting shaft 216 and rotates relative to the base 211 with the second axis bb as the center of rotation. Optionally, the mounting bracket 212 is rotatably connected to two sidewalls 211b via the connecting shaft 216. A gap is formed between the mounting bracket 212 and the base 211 to avoid frictional interference between the mounting bracket 212 and the base 211 support during rotation relative to the base 211.

[0104] In some alternative embodiments, the mounting frame 212 has a hollow cavity 212a, within which the rotating disk 213 is located and connected to the power converter 214, and the hollow cavity 212a is in a vacuum state. This arrangement protects the rotating disk 213 from damage. Furthermore, it reduces frictional energy loss during high-speed rotation of the rotating disk 213 within the intermediate cavity of the mounting frame 212.

[0105] In some alternative embodiments, the rotating disk 213 is disc-shaped, and the output end of the power converter 214 is connected to an output shaft 215, which can be understood as the aforementioned rotating shaft. The power converter 214 is located outside the mounting bracket 212 and connected to the center of the rotating disk 213 through the output shaft 215 to drive the rotating disk 213 to rotate. The rotating disk 213 adopts the above-described structural form, resulting in a regular shape and good vibration damping effect.

[0106] As some alternative embodiments, the mounting frame 212 can be a hollow disc structure. Optionally, the rotating disk 213 and the mounting frame 212 can be coaxially arranged, with the output shaft 215 extending from the center of the mounting frame 212 and connected to the rotating disk 213. The power converter 214 can be located at the center of the mounting frame 212 and drive the rotating disk 213 to rotate. Through the above arrangement, the energy storage vibration damping device 210 is balanced in the non-vibration state of the wind turbine generator set, and can respond quickly when vibration occurs, ensuring vibration damping requirements are met.

[0107] In some alternative embodiments, the rotating disk 213 can be a rigid body structure with uniform mass distribution and axisymmetric design, which may be made of metal material and has good vibration damping effect.

[0108] Optionally, the two ends of the output shaft 215 in its extension direction can be inserted into the rotating disk 213 and rotate with the rotating disk 213, thereby supporting the output shaft 215.

[0109] In some alternative embodiments, the energy storage vibration suppression device 210 is axisymmetric with respect to the first axis aa. With this configuration, when external disturbances occur, its precession allows it to generate a torque perpendicular to the external force, effectively suppressing structural vibration.

[0110] In some alternative embodiments, the power converter 214 may employ a structure such as a motor, which can drive the rotating disk 213 to operate at high speed, thereby optimizing the vibration damping effect.

[0111] like Figure 6 As shown, in some optional embodiments, the wind turbine generator set provided in this application includes a wind turbine foundation 300, a tower 10 connected to the wind turbine foundation 300, a nacelle 20 disposed on the tower 10, an impeller 40, a generator 30 and a first converter 70 disposed on the nacelle 20, and an energy storage vibration damping device 210 disposed on at least one of the wind turbine foundation 300, the tower 10 and the nacelle 20.

[0112] By installing the energy storage vibration damping device 210 on at least one of the tower 10 and the nacelle 20, the energy storage requirements can be met. At the same time, when the difference between the actual output power of the wind turbine body 100 and the target power of the grid 500 is equal to zero, the energy storage vibration damping device 210 can effectively suppress the vibration of the wind turbine generator set and improve the safety performance.

[0113] In some alternative embodiments, two or more energy storage vibration damping devices 210 may be provided on the nacelle 20. Alternatively, in some examples, the nacelle 20 may have at least one energy storage vibration damping device 210, and the tower 10 may have at least one energy storage vibration damping device 210 located at the top of the tower 10 near the nacelle 20. In some other embodiments, the tower 10 may have two or more energy storage vibration damping devices 210 located near the top of the nacelle 20, with the two or more energy storage vibration damping devices 210 distributed circumferentially around the tower 10 and at the same height.

[0114] When the energy storage vibration damping device 210 adopts the above-mentioned configuration, it can effectively suppress the first-order vibration of the wind turbine body 100 or the nacelle 20.

[0115] In some alternative embodiments, the controller 400 is configured to:

[0116] Fourier transform of the time-domain data of vibration acceleration yields the spectral data of vibration acceleration;

[0117] The power converter 214 is controlled to drive the rotating disk 213 to rotate to a predetermined speed based on the frequency spectrum data of the vibration acceleration. This setting facilitates the control of the rotation speed of the rotating disk 213 and optimizes the vibration suppression effect.

[0118] Optionally, the controller 400 may include a signal processing module and a real-time response module. The signal processing module is configured to perform a Fourier transform on the time-domain data of the vibration acceleration to obtain the spectral data of the vibration acceleration; the real-time response module controls the power converter 214 to drive the rotating disk 213 to rotate to a predetermined speed based on the spectral data of the vibration acceleration.

[0119] In some optional embodiments, the wind turbine generator provided in this application includes first-order spectral data of the nacelle 20 and the tower 10 as a whole in the first direction X and the first-order spectral data in the second direction Y; at least one of the two or more energy storage vibration damping devices 210 has its second axis bb extending along the first direction X and at least one of the second axis bb extending along the second direction Y, the first direction X and the second direction Y are intersecting and can be optionally perpendicular to each other, and the controller 400 is configured as follows:

[0120] When the values ​​of the first-order spectrum data in the first direction X and the first-order spectrum data in the second direction Y are both less than or equal to the value of w, the power converter 214 of each energy storage vibration damping device 210 is stopped, so that the rotation speed of each rotating disk 213 relative to the mounting frame 212 is 0; that is, the rotation speed = 0.

[0121] When at least one of the first-order spectrum data in the first direction X and the first-order spectrum data in the second direction Y is greater than w and less than or equal to p, the power converter 214 controlling at least one energy storage and vibration damping device 210 drives the rotating disk 213 to rotate at a first speed; that is, the speed = A.

[0122] When at least one of the first-order spectrum data in the first direction X and the first-order spectrum data in the second direction Y is greater than p, the power converter 214 controlling at least one energy storage and vibration damping device 210 drives the rotating disk 213 to rotate at a second speed, that is, the speed = B, and the second speed is greater than the first speed.

[0123] The specific values ​​of w, p, A, and B can be set according to the wind farm environment where the wind turbine is located, the energy storage requirements of the corresponding model of the turbine, and the vibration limits it can withstand. For example, the w value can be 0.06g and the p value can be 0.08g. Of course, this is just an example. In some embodiments, the w value can be greater than or less than 0.06g, and similarly, the p value can be greater than or less than 0.08g.

[0124] For example, the first rotational speed A can be 20,000 rpm. For example, the second rotational speed B can be 35,000 rpm. It is understood that the above is only an optional embodiment and is not limited to the above values. The values ​​can be set according to the wind farm environment where the wind turbine is located, the energy storage requirements of the corresponding model of the turbine, and the vibration limits that it can withstand.

[0125] The wind turbine generator set provided in this application embodiment uses the vibration acceleration spectrum data, including the first-order spectrum data of the wind turbine body 100 in the first direction X and the first-order spectrum data in the second direction Y. The controller 400 is configured to the above control mode, and can control the power converter 214 of the energy storage vibration damping device 210 at the corresponding position to drive the rotating disk 213213 to rotate at the corresponding speed according to the first-order spectrum values ​​of the first direction X and the second direction Y. This realizes the automatic vibration damping of the wind turbine generator set, and can provide corresponding modes according to different spectrum data, so that the vibration damping capability matches the vibration amplitude, avoids the phenomenon of under-damping or over-damping, and ensures the vibration damping effect.

[0126] like Figures 7 to 9 As shown, in some optional embodiments, the tower 10 may be equipped with two or more energy storage vibration damping devices 210, and the two or more energy storage vibration damping devices 210 may be arranged in two groups and distributed at intervals along the axial direction of the tower 10. Each group includes at least two energy storage vibration damping devices 210, and the energy storage vibration damping devices 210 in the same group are distributed at intervals along the circumference of the tower 10. With the above arrangement, the vibration damping requirements of the second-order vibration of the wind turbine body 100 can be met in addition to meeting the energy storage requirements.

[0127] Optionally, in this embodiment, the vibration acceleration spectrum data includes the first-order and second-order spectrum data of the nacelle 20 and the tower 10 as a whole in the first direction X, and the first-order and second-order spectrum data in the second direction Y. The second axis bb of at least one of the two or more energy storage vibration damping devices 210 located on the tower 10 extends along the first direction X, and the second axis bb of at least one of them extends along the second direction Y. The first direction X and the second direction Y are intersected. The controller 400 is configured to:

[0128] When the first-order and second-order spectrum data in the first direction X and the first-order and second-order spectrum data in the second direction Y are all less than or equal to the value of w, the power converter 214 of each energy storage and vibration damping device 210 on the control tower 10 stops, so that the rotation speed of each rotating disk 213 relative to the mounting frame 212 is 0.

[0129] When at least one of the first-order spectrum data and second-order spectrum data in the first direction X and the first-order spectrum data and second-order spectrum data in the second direction Y is greater than w and less than or equal to p, the power converter 214 of at least one energy storage and vibration damping device 210 on the control tower 10 drives the rotating disk 213 to rotate at a first speed.

[0130] When at least one of the first-order spectrum data and second-order spectrum data in the first direction X and the first-order spectrum data and second-order spectrum data in the second direction Y is greater than p, at least one power converter 214 on the control tower 10 drives the rotating disk 213 to rotate at a second speed, which is greater than the first speed.

[0131] The wind turbine generator set provided in this application embodiment uses the vibration acceleration spectrum data, including the first-order and second-order spectrum data of the wind turbine body 100 in the first direction X and the first-order and second-order spectrum data in the second direction Y. The controller 400 is configured to the above control mode, and can control the power converter 214 of the energy storage vibration suppression device 210 at the corresponding position to drive the rotating disk 213 to rotate at the corresponding speed according to the first-order and second-order frequency domain values ​​of the first direction X and the second direction Y, so as to realize the automatic vibration suppression of the wind turbine generator set. It can also provide corresponding modes according to different spectrum data, so that the vibration suppression capability matches the vibration amplitude, avoid the phenomenon of under-suppression or over-suppression, and ensure the vibration suppression effect.

[0132] For example, when the first-order spectrum data and second-order spectrum data in the first direction X and the first-order spectrum data and second-order spectrum data in the second direction Y are all less than or equal to the w value, the power converter 214 of each energy storage vibration damping device 210 is controlled to stop, so that the rotation speed of each rotating disk 213 relative to the mounting frame 212 is 0. In other words, the energy storage vibration damping device 210 can be in a non-vibration damping working state.

[0133] When either the first-order spectral data or the second-order spectral data in the first direction X is greater than w and less than or equal to p, the power converter 214 of at least one energy storage vibration damping device 210 drives the rotating disk 213 to rotate at a first speed. For example, the rotating disk 213 of at least one energy storage vibration damping device 210 extending along the second direction Y on its second axis bb can be controlled to rotate at the first speed.

[0134] Furthermore, when the first-order spectral data in the first direction X is greater than w and less than or equal to p, the rotating disk 213 of the energy storage vibration damping device 210 located on the nacelle 20 or on the top of the tower 10 near the nacelle 20 can be controlled to rotate at a first rotational speed. Conversely, when one of the second-order spectral data in the first direction X is greater than w and less than or equal to p, the rotating disk 213 of at least one of the energy storage vibration damping devices 210 located on the lower part of the tower 10 away from the nacelle 20 can be controlled to rotate at a first rotational speed.

[0135] When either the first-order spectrum data or the second-order spectrum data in the second direction Y is greater than w and less than or equal to p, the power converter 214 of at least one energy storage vibration damping device 210 drives the rotating disk 213 to rotate at a first speed. For example, the rotating disk 213 of at least one energy storage vibration damping device 210 extending along the first direction X on the second axis bb can be controlled to rotate at the first speed.

[0136] Furthermore, when the first-order spectral data in the second direction Y is greater than w and less than or equal to p, the rotating disk 213 of the energy storage vibration damping device 210 located on the nacelle 20 or on the top of the tower 10 near the nacelle 20 can be controlled to rotate at a first rotational speed. Conversely, when one of the second-order spectral data in the second direction Y is greater than w and less than or equal to p, the rotating disk 213 of at least one of the energy storage vibration damping devices 210 located on the lower part of the tower 10 away from the nacelle 20 can be controlled to rotate at a first rotational speed.

[0137] When either the first-order spectrum data or the second-order spectrum data in the first direction X is greater than p, at least one power converter 214 is controlled to drive the rotating disk 213 to rotate at a second speed. For example, the rotating disk 213 of at least one energy storage vibration damping device 210 with a second axis bb extending along the second direction Y can be controlled to rotate at the second speed.

[0138] Furthermore, when the first-order spectral data in the first direction X is greater than p, the rotating disk 213 of the energy storage vibration damping device 210 located on the nacelle 20 or located on the top of the tower 10 near the nacelle 20 can be controlled to rotate at a second speed. When the second-order spectral data in the first direction X is greater than p, the rotating disk 213 of at least one of the energy storage vibration damping devices 210 located at the lower part of the tower 10 away from the nacelle 20 can be controlled to rotate at a second speed.

[0139] When either the first-order or second-order spectral data in the second direction Y is greater than p, at least one power converter 214 is controlled to drive the rotating disk 213 to rotate at a second speed. For example, the rotating disk 213 of at least one energy storage and vibration damping device 210 with a second axis bb extending along the first direction X can be controlled to rotate at the second speed.

[0140] Furthermore, when the first-order spectral data in the second direction Y is greater than p, the rotating disk 213 of the energy storage vibration damping device 210 located on the nacelle 20 or located on the top of the tower 10 near the nacelle 20 can be controlled to rotate at a second speed. When the second-order spectral data in the second direction Y is greater than p, the rotating disk 213 of at least one of the energy storage vibration damping devices 210 located at the lower part of the tower 10 away from the nacelle 20 can be controlled to rotate at a second speed.

[0141] like Figure 10As shown, in some optional embodiments, at least two energy storage vibration damping devices 210 are provided on the wind turbine foundation 300. The spectral data of vibration acceleration includes the vibration acceleration of the floating body. The controller 400 is configured to control the power converter 214 of at least one vibration damping device on the wind turbine foundation 300 to drive the rotating disk 213 to rotate to a predetermined speed according to the vibration acceleration of the floating body. Through the above configuration, when the wind turbine generator set is an offshore unit, in addition to meeting the energy storage requirements, it can also dampen the vibration of the wind turbine foundation 300, thereby improving the overall safety performance of the wind turbine generator set.

[0142] To improve stability, the wind turbine foundation 300 can be connected to the seabed 60 via a mooring system 50.

[0143] As some optional embodiments, the wind turbine foundation 300 may include multiple floating bodies 300a and connecting bodies 330. The multiple floating bodies 300a are spaced apart from each other, and the center line connecting the floating bodies 300a forms a polygon. Adjacent floating bodies 300a are connected by connecting bodies 330. The tower 10 is connected to one of the floating bodies 300a, and energy storage vibration damping devices 210 are connected to the remaining floating bodies 300a. With the above arrangement, the support requirements of the wind turbine body 100 can be guaranteed, and the energy storage vibration damping devices 210 located on each floating body 300a can work together to suppress the vibration of the wind turbine foundation 300.

[0144] In some optional embodiments, there are three floating bodies 300a, and the center lines connecting them form a triangle. One floating body 300a is connected to the tower 10, and the remaining two floating bodies 300a are each connected to an energy storage vibration damping device 210. The second axes bb of the two energy storage vibration damping devices 210 intersect. The structure is simple and has high stability.

[0145] like Figure 10 As shown, in some optional embodiments, when the number of floating bodies 300a is three, in the wind turbine generator provided in this application embodiment, the second axis bb of one of the two energy storage vibration damping devices 210 of the wind turbine foundation 300 extends along the first direction X and the second axis bb of the other extends along the second direction Y, the first direction X and the second direction Y are perpendicular, and the vibration acceleration of the floating body includes the first direction rotational acceleration about the first direction X and the second direction rotational acceleration about the second direction Y. The controller 400 is configured to:

[0146] When the first-order spectrum data corresponding to the rotational acceleration in the first direction is less than or equal to m, the rotating disk 213 of the energy storage vibration damping device 210 extending along the first direction X on the second axis bb on the wind turbine foundation 300 is stationary, i.e., n = 0, and the rotating disk 213 of the energy storage vibration damping device 210 extending along the second direction Y on the second axis bb on the wind turbine foundation 300 rotates within the first speed range, i.e., 0 < n ≤ A.

[0147] When the first-order spectrum data corresponding to the rotational acceleration in the first direction is greater than m and less than or equal to L, the rotating disk 213 of the vibration damping device extending along the first direction X on the second axis bb of the wind turbine foundation 300 is stationary, i.e., n = 0, and the rotating disk 213 of the energy storage vibration damping device 210 extending along the second direction Y on the second axis bb of the wind turbine foundation 300 rotates within the second speed range, i.e., A < n ≤ B, and the minimum value of the second speed range is greater than the maximum value of the first speed range.

[0148] The values ​​of m and L can be specifically set according to the wind turbine foundation 300, the wind farm environment where the wind turbine generator is located, the energy storage requirements of the corresponding model of the generator, and the vibration limit it can withstand. For example, the value of m can be 0.04g and the value of L can be 0.08g. Of course, this is just an example. In some embodiments, the value of m can be greater than or less than 0.04g. Similarly, the value of K can be greater than or less than 0.08g.

[0149] The value of A can be 20,000 rpm, and the value of B can be 35,000 rpm. For example, the first speed range can be: 0 < n ≤ 20,000 rpm. For example, the second speed range can be: 20,000 rpm < n ≤ 35,000 rpm.

[0150] The wind turbine generator set provided in this application embodiment achieves automated vibration suppression of the floating wind turbine foundation 300 by having the second axis bb of one of the two energy storage vibration suppression devices 210 extend along the first direction X and the second axis bb of the other extend along the second direction Y, with the first direction X and the second direction Y being perpendicular. The rotational speed of the rotating disk 213 of the energy storage vibration suppression device 210 whose second axis bb extends along the second direction Y is configured according to the numerical range of the rotational acceleration in the first direction X. Furthermore, it can provide corresponding control methods according to different rotational accelerations in the first direction, so that the vibration suppression capability matches the vibration amplitude, avoids under-suppression or over-suppression, and ensures the vibration suppression effect.

[0151] In some alternative embodiments, when the second axis bb of one of the two energy storage vibration damping devices 210 on the wind turbine foundation 300 extends along the first direction X and the second axis bb of the other extends along the second direction Y, with the first direction X and the second direction Y being perpendicular, the controller 400 is further configured to:

[0152] When the first-order spectrum data corresponding to the second-direction rotational acceleration is less than or equal to m, the rotating disk 213 of the energy storage vibration damping device 210 extending along the second direction Y on the second axis bb of the wind turbine foundation 300 is stationary, i.e. n = 0, and the rotating disk 213 of the energy storage vibration damping device 210 extending along the first direction X on the second axis bb of the wind turbine foundation 300 rotates within the first speed range, i.e. 0 < n ≤ A.

[0153] When the first-order spectrum data corresponding to the rotational acceleration in the second direction is greater than m and less than or equal to L, the rotating disk 213 of the energy storage vibration damping device 210 extending along the second direction Y on the second axis bb on the wind turbine foundation 300 is stationary, i.e., n = 0, and the rotating disk 213 of the energy storage vibration damping device 210 extending along the first direction X on the second axis bb on the wind turbine foundation 300 rotates within the second speed range, i.e., A < n ≤ B.

[0154] The values ​​of m, L, the first speed range, and the second speed range are the same as above, and will not be repeated here.

[0155] like Figure 11 As shown, in some optional embodiments, when three floating bodies 300a are included, and one floating body 300a is used to connect to the tower 10, and the remaining two floating bodies 300a are provided with energy storage vibration damping devices 210, the second axes bb of the two energy storage vibration damping devices 210 can be made to converge at the center of the wind turbine foundation 300. The vibration acceleration of the floating body includes a rotational acceleration about a first direction X and a rotational acceleration about a second direction Y. The first direction X and the second direction Y are perpendicular to each other and intersect the second axis bb of each energy storage vibration damping device 210 respectively. The controller 400 is configured as follows:

[0156] When at least one of the first-order spectrum data corresponding to the rotational acceleration in the first direction and the first-order spectrum data corresponding to the rotational acceleration in the second direction is less than or equal to m, the rotating disk 213 of each energy storage vibration suppression device 210 is controlled to rotate within the first rotational speed range, i.e. 0 < n ≤ A.

[0157] When at least one of the first-order spectrum data corresponding to the rotational acceleration in the first direction and the first-order spectrum data corresponding to the rotational acceleration in the second direction is greater than m and less than or equal to n, the rotating disk 213 of each energy storage vibration suppression device 210 is controlled to rotate within the second rotational speed range, i.e., A < n ≤ B, and the minimum value of the second rotational speed range is greater than the maximum value of the first rotational speed range.

[0158] The values ​​of m, L, the first speed range, and the second speed range are the same as above, and will not be repeated here.

[0159] The two energy storage vibration damping devices 210 are arranged in the above manner, so that the two energy storage vibration damping devices 210 can work synchronously under different conditions, jointly damping vibration and optimizing the vibration damping effect.

[0160] The wind turbine generator set provided in this application embodiment has good vibration suppression effect, fast response speed and low cost because it includes the floating energy storage vibration suppression device 210 provided in the above embodiments.

[0161] like Figure 12 as well as Figure 13 As shown in one aspect of the present invention, the wind turbine foundation 300 of the wind turbine generator provided in this application embodiment may also include a main floating body 310, a plurality of sub-floating bodies 320, and a connecting body 330 corresponding to each sub-floating body 320. The plurality of sub-floating bodies 320 are distributed at intervals around the main floating body 310, and each sub-floating body 320 is connected to the main floating body 310 through a corresponding connecting body 330. The main floating body 310 is connected to the tower 10, and each sub-floating body 320 is connected to an energy storage vibration damping device 210. The wind turbine foundation 300 adopting the above structure can also meet the support requirements of the tower 10 and the automatic vibration damping function.

[0162] In some optional embodiments, the number of sub-floats 320 is three, and the lines connecting their centers form a triangle. The distance from the center of the main float 310 to the center of each sub-float 320 is equal, and the axes of the energy storage and vibration damping devices 210 installed on each sub-float 320 intersect each other. This arrangement ensures the stable performance of the wind turbine generator set.

[0163] In some alternative embodiments, the wind turbine foundation 300 may also include a reinforcing body 340, and two adjacent sub-floating bodies 320 may be connected by the reinforcing body to ensure the load-bearing capacity of the wind turbine foundation 300.

[0164] In some optional embodiments, the buoy vibration acceleration includes a first-direction rotational acceleration about a first direction X and a second-direction rotational acceleration about a second direction Y, the first direction X and the second direction Y being perpendicular to each other. The three energy storage vibration damping devices 210 respectively include a first vibration damping device 210a, a second vibration damping device 210b, and a third vibration damping device 210c. The second axis bb of the first vibration damping device 210a extends along the line connecting the centers of the sub-floating bodies 320 where the first vibration damping device 210a and the third vibration damping device 210c are located. The second axis bb of the second vibration damping device 210b extends along the line connecting the centers of the sub-floating bodies 320 where the second vibration damping device 210b and the third vibration damping device 210c are located. The second axis bb of the third vibration damping device 210c extends along the second direction Y. The controller 400 is configured to:

[0165] When the first-order spectrum data corresponding to the first-direction rotational acceleration is less than or equal to m, the rotating disks 213 of the first vibration damping device 210a and the second vibration damping device 210b are kept stationary, i.e., n = 0, where n represents the rotational speed, and the rotating disks 213 of the third vibration damping device 210c are controlled to rotate within the first rotational speed range, i.e., 0 < n ≤ A.

[0166] When the first-order spectrum data corresponding to the rotational acceleration in the first direction is greater than m and less than or equal to k, the rotating disks 213 of the first vibration damping device 210a and the second vibration damping device 210b are controlled to rotate within the first rotational speed range, i.e., 0 < n ≤ A, and the rotating disks 213 of the third vibration damping device 210c are controlled to rotate within the second rotational speed range, i.e., A < n ≤ B, where the minimum value of the second rotational speed range is greater than the maximum value of the first rotational speed range.

[0167] When the first-order spectrum data corresponding to the rotational acceleration in the first direction is greater than k and less than or equal to L, the rotating disk 213 controlling the first vibration damping device 210a, the second vibration damping device 210b and the third vibration damping device 210c all rotate within the second rotational speed range, i.e., A < n ≤ B.

[0168] The values ​​of m, k, and L can be specifically set according to the wind turbine foundation 300, the wind farm environment where the wind turbine generator is located, the energy storage requirements of the corresponding model of the generator, and the vibration limit it can withstand. For example, the value of m can be 0.04g, the value of k can be 0.06g, and the value of L can be 0.08g. Of course, this is just an example. In some embodiments, the value of m can be greater than or less than 0.04g, the value of k can be greater than or less than 0.06g, and similarly, the value of L can be greater than or less than 0.08g.

[0169] The value of A can be 20,000 rpm, and the value of B can be 35,000 rpm. For example, the first speed range can be: 0 < n ≤ 20,000 rpm. For example, the second speed range can be: 20,000 rpm < n ≤ 35,000 rpm.

[0170] The wind turbine foundation 300 provided in this application embodiment, through the above-mentioned settings, enables the wind turbine foundation 300 to automatically suppress vibration based on the value of the rotational acceleration in the first direction, and can provide corresponding methods according to different rotational accelerations in the first direction, so that the vibration suppression capability matches the vibration amplitude, avoids the phenomenon of under-suppression or over-suppression, and ensures the vibration suppression effect.

[0171] In some alternative embodiments, the controller 400 is also configured to control the rotating disk 213 of the third vibration damping device 210c to remain stationary (i.e., n = 0) when the first-order spectral data corresponding to the second-direction rotational acceleration is less than or equal to m, and to control the rotating disks 213 of the first vibration damping device 210a and the second vibration damping device 210b to rotate within a first rotational speed range (i.e., 0 < n ≤ A).

[0172] When the first-order spectrum data corresponding to the second-direction rotational acceleration is greater than m and less than or equal to L, the rotating disk 213 of the third vibration damping device 210c is kept stationary, i.e., n = 0, and the rotating disks 213 of the first vibration damping device 210a and the second vibration damping device 210b are both rotated within the second rotational speed range, i.e., A < n ≤ B.

[0173] The m value, L value, first speed range, and second speed range are the same as above, and will not be repeated here.

[0174] The wind turbine foundation 300 provided in this application embodiment adopts the above-mentioned settings, which enables the wind turbine foundation 300 to automatically suppress vibration according to the value of the rotational acceleration in the second direction Y, and can provide corresponding methods according to different rotational accelerations in the second direction Y, so that the vibration suppression capability matches the vibration amplitude, avoids the phenomenon of under-suppression or over-suppression, and ensures the vibration suppression effect.

[0175] like Figure 14 As shown, in some optional embodiments, the buoy vibration acceleration includes a first-direction rotational acceleration about a first direction X and a second-direction rotational acceleration about a second direction Y, the first direction X and the second direction Y being perpendicular to each other. The three energy storage vibration damping devices 210 respectively include a first vibration damping device 210a, a second vibration damping device 210b, and a third vibration damping device 210c. The second axis bb of the first vibration damping device 210a extends along the first direction X, the second vibration damping device 210b extends along the second direction Y, and the second axis bb of the third vibration damping device 210c extends along the line connecting the centers of the sub-floating body 320 where the second vibration damping device 210b and the sub-floating body 320 where the third vibration damping device 210c are located. The controller 400 is configured to:

[0176] When the first-order spectrum data corresponding to the first-direction rotational acceleration is less than or equal to m, the rotating disk 213 of the first vibration damping device 210a and the third vibration damping device 210c is kept stationary, i.e. n = 0, and the rotating disk 213 of the second vibration damping device 210b is controlled to rotate within the first rotational speed range, i.e. 0 < n ≤ A.

[0177] When the first-order spectrum data corresponding to the rotational acceleration in the first direction is greater than m and less than or equal to k, the rotating disk 213 of the first vibration damping device 210a is controlled to be stationary, i.e., n = 0. The rotating disk 213 of the third vibration damping device 210c is controlled to rotate within the first speed range, and the rotating disk 213 of the second vibration damping device 210b is controlled to rotate within the second speed range, i.e., 0 < n ≤ A, and the minimum value of the second speed range is greater than the maximum value of the first speed range.

[0178] When the first-order spectrum data corresponding to the rotational acceleration in the first direction is greater than k and less than or equal to L, the rotating disk 213 of the first vibration damping device 210a is kept stationary, i.e., n = 0, and the rotating disk 213 of the third vibration damping device 210c and the rotating disk 213 of the second vibration damping device 210b are controlled to rotate within the second rotational speed range, i.e., A < n ≤ B.

[0179] The values ​​of m, k, and L, as well as the first and second speed ranges, are the same as above and will not be repeated here.

[0180] The wind turbine foundation 300 provided in this application embodiment, through the above-mentioned settings, enables the wind turbine foundation 300 to automatically suppress vibration based on the value of the first direction X rotational acceleration, and can provide corresponding control methods according to different first direction X rotational accelerations, so that the vibration suppression capability matches the vibration amplitude, avoids the phenomenon of under-suppression or over-suppression, and ensures the vibration suppression effect.

[0181] In some optional embodiments, when the second axis bb of the first vibration damping device 210a extends along the first direction X, the second axis bb of the second vibration damping device 210b extends along the second direction Y, and the second axis bb of the third vibration damping device 210c extends along the line connecting the centers of the sub-floating body 320 where the second vibration damping device 210b and the sub-floating body 320 where the third vibration damping device 210c are located, the controller 400 is further configured to:

[0182] When the first-order spectrum data corresponding to the second-direction rotational acceleration is less than or equal to m, the rotating disk 213 of the second vibration damping device 210b and the third vibration damping device 210c is kept stationary, i.e. n = 0, and the rotating disk 213 of the first vibration damping device 210a is controlled to rotate within the first rotational speed range, i.e. 0 < n ≤ A.

[0183] When the first-order spectrum data corresponding to the second-direction rotational acceleration is greater than m and less than or equal to k, the rotating disk 213 of the second vibration damping device 210b is controlled to remain stationary, i.e., n = 0; the rotating disk 213 of the third vibration damping device 210c is controlled to rotate within the first rotational speed range, i.e., 0 < n ≤ A; and the rotating disk 213 of the first vibration damping device 210a is controlled to rotate within the second rotational speed range, i.e., A < n ≤ B.

[0184] When the first-order spectrum data corresponding to the second-direction rotational acceleration is greater than k and less than or equal to L, the rotating disk 213 of the second vibration damping device 210b is kept stationary, i.e., n = 0, and the rotating disk 213 of the third vibration damping device 210c and the rotating disk 213 of the first vibration damping device 210a are controlled to rotate within the second rotational speed range, i.e., A < n ≤ B.

[0185] The values ​​of m, k, and L, as well as the first and second speed ranges, are the same as above and will not be repeated here.

[0186] The wind turbine foundation 300 provided in this application embodiment adopts the above-mentioned settings, which enables the wind turbine foundation 300 to automatically suppress vibration according to the value of the second direction Y rotational acceleration, and can provide corresponding methods according to different second direction Y rotational accelerations, so that the vibration suppression capability matches the vibration amplitude, avoids the phenomenon of under-suppression or over-suppression, and ensures the vibration suppression effect.

[0187] like Figure 15 as well as Figure 16 As shown, on the other hand, embodiments of this application also provide a control method for a wind turbine generator set, characterized in that it includes:

[0188] S100, Configuration steps: Configure the wind turbine generator set provided in the above embodiments;

[0189] S200, Acquisition Step: Acquire the difference between the actual output power M of the wind turbine body 100 and the target power N of the power grid, as well as the vibration acceleration of the wind turbine body 100.

[0190] S300, Control Steps: When the absolute value of the difference is greater than zero, the energy storage vibration suppression device 210 is controlled to be in either a charging state or a discharging state. In the charging state, the power converter 214 drives the rotating disk 213 to rotate and store electrical energy. In the discharging state, the rotating disk 213 drives the power converter 214 to rotate and release electrical energy. When the absolute value of the difference is equal to zero, the power converter 214 is controlled to drive the rotating disk 213 to rotate relative to the mounting frame 212 to a predetermined speed according to the vibration acceleration, so as to suppress the vibration of the fan body 100.

[0191] The control method provided in this application embodiment can be used to control the wind turbine generator set provided in the above embodiments. It can control the energy storage vibration suppression device 210 to be in a charging state, a discharging state, or a vibration suppression state based on the difference between the actual output power of the wind turbine body 100 and the target power of the power grid 500. It can achieve multiple uses of one machine, making the wind turbine generator set cheaper and more competitive in the market.

[0192] In some optional embodiments, the control method provided in this application includes control step S300, which includes:

[0193] When the difference is greater than zero, the energy storage and vibration damping device 210 is in a charging state, and the power converter 214 drives the rotating disk 213 to rotate and store electrical energy.

[0194] When the difference is less than zero, the energy storage and vibration damping device 210 is in a discharge state, and the rotating disk 213 drives the power converter 214 to rotate and release electrical energy.

[0195] In some optional embodiments, the control method provided in this application provides that the number of energy storage vibration damping devices 210 is two or more. When the difference is greater than zero, the energy storage vibration damping devices 210 are controlled to be in a charging state. The steps of the power converter 214 driving the rotating disk 213 to rotate and store electrical energy include:

[0196] The number of energy storage vibration damping devices 210 is determined based on the difference;

[0197] The corresponding number of energy storage and vibration damping devices 210 are activated according to the matching quantity to jointly store electrical energy.

[0198] With the above settings, the corresponding number of energy storage vibration damping devices 210 can be matched according to the electrical energy to be stored, so as to ensure the energy storage requirements.

[0199] In some optional embodiments, the control method provided in this application provides that the number of energy storage vibration damping devices 210 is two or more. When the difference is less than zero, the energy storage vibration damping devices 210 are controlled to be in a discharge state, and the steps of the rotating disk 213 driving the power converter 214 to rotate and release electrical energy include:

[0200] The number of energy storage vibration damping devices 210 is determined based on the difference;

[0201] The corresponding number of energy storage and vibration damping devices 210 are activated according to the matching quantity to release electrical energy together.

[0202] With the above settings, the appropriate number of energy storage vibration damping devices 210 can be matched according to the electrical energy to be stored, so as to ensure the discharge requirements.

[0203] In some alternative embodiments, when the absolute value of the difference is equal to zero, the controller 400 controls the power converter 214 to drive the rotating disk 213 to rotate relative to the mounting frame 212 to a predetermined speed according to the vibration acceleration, so as to suppress the vibration of the wind turbine body 100. Energy storage vibration suppression devices 210 can be correspondingly installed on the nacelle 20, tower 10, and wind turbine foundation 300 of the wind turbine body 100. The control methods for the first-order and second-order vibrations of the wind turbine body 100 in the first direction X, the first-order and second-order vibrations in the second direction Y, and the first-order vibrations of the wind turbine foundation 300 in the first direction X and the second-order vibrations in the second direction Y correspond to the control methods of the controller 400 in the wind turbine generator set of the above embodiments, and will not be repeated here.

[0204] 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 wind turbine generator set, characterized in that, include: The wind turbine body includes an impeller, a generator, and a first converter. The generator is connected between the impeller and the first converter, and the first converter is used to connect to the power grid. An energy storage vibration damping device is installed on the wind turbine body, including a base, a mounting frame, a rotating disk, and a power converter. The power converter is connected to the mounting frame and can drive the rotating disk to rotate relative to the mounting frame about a first axis as the rotation center. The mounting frame is rotatably connected to the base and can rotate relative to the base about a second axis as the rotation center. The first axis and the second axis are intersecting. The controller acquires the difference between the actual output power of the wind turbine body and the target power of the power grid, as well as the vibration acceleration of the wind turbine body. When the absolute value of the difference is greater than zero, the controller controls the energy storage vibration damping device to be in either a charging state or a discharging state. In the charging state, the power converter drives the rotating disk to rotate and store electrical energy. In the discharging state, the rotating disk drives the power converter to rotate and release electrical energy. When the absolute value of the difference is equal to zero, the controller controls the power converter to drive the rotating disk to rotate relative to the mounting frame to a predetermined speed according to the vibration acceleration, so as to suppress the vibration of the fan body.

2. The wind turbine generator set according to claim 1, characterized in that, The energy storage vibration damping device also includes a second converter, which is connected between the power converter and the output terminal of the first converter.

3. The wind turbine generator set according to claim 1, characterized in that, The number of energy storage vibration damping devices is two or more, and the two or more energy storage vibration damping devices are connected in parallel and are all connected to the output terminal of the first converter. The controller determines the number of energy storage vibration damping devices in the charging state or the discharging state based on the value of the difference.

4. The wind turbine generator set according to claim 3, characterized in that, The wind turbine body also includes a wind turbine foundation, a tower, and a nacelle. The tower is connected to the wind turbine foundation, the nacelle is disposed on the tower, the impeller, the generator, and the first converter are all disposed on the nacelle, and the energy storage vibration damping device is disposed on at least one of the wind turbine foundation, the tower, and the nacelle.

5. The wind turbine generator set according to claim 4, characterized in that, The controller is configured to: The frequency spectrum data of the vibration acceleration is obtained by Fourier transforming the time-domain data of the vibration acceleration. The power converter is controlled to drive the rotating disk to a predetermined speed based on the spectral data of the vibration acceleration.

6. The wind turbine generator set according to claim 5, characterized in that, The cabin is equipped with two or more of the aforementioned energy storage and vibration damping devices; Alternatively, the nacelle is provided with at least one of the energy storage vibration damping devices, and the tower is provided with at least one of the energy storage vibration damping devices and is located on the top of the tower near the nacelle; Alternatively, the tower may be equipped with two or more energy storage vibration damping devices near the top of the nacelle, with the two or more energy storage vibration damping devices distributed at intervals along the circumference of the tower and each energy storage vibration damping device being at the same height.

7. The wind turbine generator set according to claim 6, characterized in that, The vibration acceleration spectral data includes first-order spectral data of the cabin in a first direction and first-order spectral data in a second direction; the second axis of at least one of the two or more energy storage vibration damping devices extends along the first direction and the second axis of at least one extends along the second direction, the first direction and the second direction are intersecting, and the controller is configured to: When the values ​​of the first-order spectrum data in the first direction and the first-order spectrum data in the second direction are both less than or equal to the w value, the power converter of each of the energy storage and vibration damping devices is stopped, so that the rotational speed of each of the rotating disks relative to the mounting frame is 0. When at least one of the first-order spectrum data in the first direction and the first-order spectrum data in the second direction is greater than w and less than or equal to p, the power converter of at least one of the energy storage and vibration damping devices drives the rotating disk to rotate at a first speed. When at least one of the first-order spectrum data in the first direction and the first-order spectrum data in the second direction is greater than p, the power converter of at least one of the energy storage and vibration damping devices is controlled to drive the rotating disk to rotate at a second speed, which is greater than the first speed.

8. The wind turbine generator set according to claim 5, characterized in that, The tower is provided with two or more energy storage vibration damping devices, and the two or more energy storage vibration damping devices are respectively set into two groups and distributed at intervals along the axial direction of the tower. Each group includes at least two energy storage vibration damping devices, and the energy storage vibration damping devices in the same group are distributed at intervals along the circumferential direction of the tower.

9. The wind turbine generator set according to claim 8, characterized in that, The vibration acceleration spectral data includes first-order and second-order spectral data of the nacelle in a first direction, and first-order and second-order spectral data in a second direction. The second axis of at least one of the two or more energy storage vibration damping devices located on the tower extends along the first direction, and the second axis of at least one of them extends along the second direction, with the first and second directions intersecting. The controller is configured to: When the first-order and second-order spectrum data in the first direction and the first-order and second-order spectrum data in the second direction are all less than or equal to the w value, the power converter of each energy storage vibration damping device on the tower is stopped, so that the rotation speed of each rotating disk relative to the mounting frame is 0. When at least one of the first-order spectrum data and second-order spectrum data in the first direction and the first-order spectrum data and second-order spectrum data in the second direction is greater than w and less than or equal to p, the power converter controlling at least one of the energy storage and vibration damping devices on the tower drives the rotating disk to rotate at a first speed. When at least one of the first-order spectrum data and second-order spectrum data in the first direction and the first-order spectrum data and second-order spectrum data in the second direction is greater than p, at least one of the power converters on the tower is controlled to drive the rotating disk to rotate at a second speed, which is greater than the first speed.

10. The wind turbine generator set according to claim 5, characterized in that, At least two of the energy storage vibration damping devices are provided on the foundation of the wind turbine. The spectral data of the vibration acceleration includes the vibration acceleration of the floating body. The controller is configured to control the power converter of at least one of the vibration damping devices on the foundation of the wind turbine to drive the rotating disk to rotate to a predetermined speed according to the vibration acceleration of the floating body.

11. The wind turbine generator set according to claim 10, characterized in that, The wind turbine foundation includes multiple floating bodies and connecting bodies. The multiple floating bodies are spaced apart from each other and the center line connecting the floating bodies forms a polygon. Adjacent floating bodies are connected by the connecting bodies. The tower is connected to one of the floating bodies, and the energy storage vibration damping device is connected to the remaining floating bodies.

12. The wind turbine generator set according to claim 11, characterized in that, The number of floating bodies is three, and the center line connecting them forms a triangle. One of the floating bodies is connected to the tower, and the remaining two floating bodies are each connected to the energy storage and vibration damping device. The second axes of the two energy storage and vibration damping devices are intersecting.

13. The wind turbine generator set according to claim 12, characterized in that, One of the two energy storage vibration damping devices located on the wind turbine foundation has its second axis extending along a first direction, and the other has its second axis extending along a second direction, the first direction being perpendicular to the second direction. The vibration acceleration of the floating body includes a first-direction rotational acceleration about the first direction and a second-direction rotational acceleration about the second direction. The controller is configured to: When the first-order spectrum data corresponding to the rotational acceleration in the first direction is less than or equal to m, the rotating disk of the energy storage vibration damping device extending along the first direction on the second axis of the wind turbine is kept stationary, and the rotating disk of the energy storage vibration damping device extending along the second direction on the second axis of the wind turbine is controlled to rotate within the first speed range. When the first-order spectrum data corresponding to the rotational acceleration in the first direction is greater than m and less than or equal to L, the rotating disk of the energy storage vibration damping device extending along the second axis on the wind turbine base along the first direction is controlled to remain stationary, and the rotating disk of the energy storage vibration damping device extending along the second axis on the wind turbine base along the second direction is controlled to rotate within a second rotational speed range, where the minimum value of the second rotational speed range is greater than the maximum value of the first rotational speed range.

14. The wind turbine generator set according to claim 12, characterized in that, One of the two energy storage vibration damping devices located on the wind turbine foundation has its second axis extending along a first direction and the other has its second axis extending along a second direction, the first direction being perpendicular to the second direction. The vibration acceleration of the floating body includes a first-direction rotational acceleration about the first direction and a second-direction rotational acceleration about the second direction. The controller is further configured to: When the first-order spectrum data corresponding to the rotational acceleration in the second direction is less than or equal to m, the rotating disk of the energy storage vibration damping device extending along the second axis on the wind turbine foundation is kept stationary, and the rotating disk of the energy storage vibration damping device extending along the first axis on the wind turbine foundation is controlled to rotate within the first speed range. When the first-order spectrum data corresponding to the rotational acceleration in the second direction is greater than m and less than or equal to L, the rotating disk of the energy storage vibration damping device extending along the second direction on the wind turbine foundation is kept stationary, and the rotating disk of the energy storage vibration damping device extending along the first direction on the wind turbine foundation is controlled to rotate within the second speed range.

15. The wind turbine generator set according to claim 12, characterized in that, The second axes of the two energy storage vibration damping devices converge at the center of the wind turbine foundation. The vibration acceleration of the floating body includes a rotational acceleration about a first direction and a rotational acceleration about a second direction. The first direction and the second direction are perpendicular to each other and intersect the second axis of each of the energy storage vibration damping devices. The controller is configured to: When at least one of the first-order spectrum data corresponding to the first-direction rotational acceleration and the first-order spectrum data corresponding to the second-direction rotational acceleration is less than or equal to m, the rotating disk of each energy storage vibration damping device on the wind turbine foundation is controlled to rotate within the first speed range. When at least one of the first-order spectrum data corresponding to the rotational acceleration in the first direction and the first-order spectrum data corresponding to the rotational acceleration in the second direction is greater than m and less than or equal to n, the rotating disk of each of the energy storage and vibration damping devices on the wind turbine foundation is controlled to rotate within a second rotational speed range, where the minimum value of the second rotational speed range is greater than the maximum value of the first rotational speed range.

16. The wind turbine generator set according to claim 10, characterized in that, The wind turbine foundation includes a main floating body, multiple sub-floating bodies, and a connecting body corresponding to each sub-floating body. The multiple sub-floating bodies are distributed at intervals around the main floating body. Each sub-floating body is connected to the main floating body through a corresponding connecting body. The main floating body is connected to the tower. Each sub-floating body is connected to the energy storage vibration damping device.

17. The wind turbine generator set according to claim 16, characterized in that, The number of sub-floating bodies is three, and the center lines connecting them form a triangle. The distance from the center of the main floating body to the center of each sub-floating body is equal, and the axes of the energy storage and vibration damping devices installed on each sub-floating body intersect each other.

18. The wind turbine generator set according to claim 17, characterized in that, The vibration acceleration of the floating body includes a rotational acceleration about a first direction and a rotational acceleration about a second direction, the first direction and the second direction being perpendicular to each other. The three energy storage vibration damping devices each include a first vibration damping device, a second vibration damping device, and a third vibration damping device. The second axis of the first vibration damping device extends along the line connecting the centers of the sub-floating bodies where the first and third vibration damping devices are located. The second axis of the second vibration damping device extends along the line connecting the centers of the sub-floating bodies where the second and third vibration damping devices are located. The second axis of the third vibration damping device extends along the second direction. The controller is configured to: When the first-order spectrum data corresponding to the rotational acceleration in the first direction is less than or equal to m, the rotating disks of the first and second vibration damping devices are controlled to remain stationary, and the rotating disks of the third vibration damping device are controlled to rotate within the first rotational speed range. When the first-order spectrum data corresponding to the first-direction rotational acceleration is greater than m and less than or equal to k, the rotating disks of the first and second vibration damping devices are controlled to rotate within the first rotational speed range, and the rotating disks of the third vibration damping device are controlled to rotate within the second rotational speed range, wherein the minimum value of the second rotational speed range is greater than the maximum value of the first rotational speed range. When the first-order spectrum data corresponding to the rotational acceleration in the first direction is greater than k and less than or equal to L, the rotating disks of the first vibration damping device, the second vibration damping device, and the third vibration damping device are all controlled to rotate within the second rotational speed range.

19. The wind turbine generator set according to claim 17, characterized in that, The vibration acceleration of the floating body includes a rotational acceleration about a first direction and a rotational acceleration about a second direction, the first direction and the second direction being perpendicular to each other. The three energy storage vibration damping devices each include a first vibration damping device, a second vibration damping device, and a third vibration damping device. The second axis of the first vibration damping device extends along the line connecting the centers of the sub-floating bodies where the first and third vibration damping devices are located. The second axis of the second vibration damping device extends along the line connecting the centers of the sub-floating bodies where the second and third vibration damping devices are located. The second axis of the third vibration damping device extends along the second direction. The controller is further configured to: When the first-order spectrum data corresponding to the rotational acceleration in the second direction is less than or equal to m, the rotating disk of the third vibration damping device is controlled to remain stationary, and the rotating disks of the first and second vibration damping devices are controlled to rotate within the first rotational speed range. When the first-order spectrum data corresponding to the rotational acceleration in the second direction is greater than m and less than or equal to L, the rotating disk of the third vibration damping device is controlled to remain stationary, and the rotating disks of the first vibration damping device and the second vibration damping device are controlled to rotate within the second rotational speed range.

20. The wind turbine generator set according to claim 17, characterized in that, The vibration acceleration of the floating body includes a rotational acceleration about a first direction and a rotational acceleration about a second direction, the first direction and the second direction being perpendicular to each other. The three energy storage vibration damping devices each include a first vibration damping device, a second vibration damping device, and a third vibration damping device. The second axis of the first vibration damping device extends along the first direction, the second vibration damping device extends along the second direction, and the second axis of the third vibration damping device extends along the line connecting the centers of the sub-floating body containing the second vibration damping device and the sub-floating body containing the third vibration damping device. The controller is configured to: When the first-order spectrum data corresponding to the rotational acceleration in the first direction is less than or equal to m, the rotating disks of the first vibration damping device and the third vibration damping device are kept stationary, and the rotating disks of the second vibration damping device are controlled to rotate within the first rotational speed range. When the first-order spectrum data corresponding to the first-direction rotational acceleration is greater than m and less than or equal to k, the rotating disk of the first vibration damping device is controlled to be stationary, the rotating disk of the third vibration damping device is controlled to rotate within the first rotational speed range, and the rotating disk of the second vibration damping device is controlled to rotate within the second rotational speed range, wherein the minimum value of the second rotational speed range is greater than the maximum value of the first rotational speed range. When the first-order spectrum data corresponding to the first-direction rotational acceleration is greater than k and less than or equal to L, the rotating disk of the first vibration damping device is controlled to be stationary, and the rotating disk of the third vibration damping device and the rotating disk of the second vibration damping device are controlled to rotate within the second rotational speed range.

21. The wind turbine generator set according to claim 17, characterized in that, The vibration acceleration of the floating body includes a rotational acceleration about a first direction and a rotational acceleration about a second direction, the first direction and the second direction being perpendicular to each other. The three energy storage vibration damping devices each include a first vibration damping device, a second vibration damping device, and a third vibration damping device. The second axis of the first vibration damping device extends along the first direction, the second vibration damping device extends along the second direction, and the second axis of the third vibration damping device extends along the line connecting the centers of the sub-floating body containing the second vibration damping device and the sub-floating body containing the third vibration damping device. The controller is further configured to: When the first-order spectrum data corresponding to the rotational acceleration in the second direction is less than or equal to m, the rotating disks of the second and third vibration damping devices are controlled to remain stationary, and the rotating disks of the first vibration damping device are controlled to rotate within the first rotational speed range. When the first-order spectrum data corresponding to the rotational acceleration in the second direction is greater than m and less than or equal to k, the rotating disk of the second vibration damping device is controlled to be stationary, the rotating disk of the third vibration damping device is controlled to rotate within the first speed range, and the rotating disk of the first vibration damping device is controlled to rotate within the second speed range. When the first-order spectrum data corresponding to the rotational acceleration in the second direction is greater than k and less than or equal to L, the rotating disk of the second vibration damping device is controlled to be stationary, and the rotating disk of the third vibration damping device and the rotating disk of the first vibration damping device are controlled to rotate within the second rotational speed range.

22. A control method for a wind turbine generator set, characterized in that, include: Configuration steps: Configure the wind turbine generator set as described in any one of claims 1 to 21; The acquisition step involves obtaining the difference between the actual output power of the wind turbine body and the target power of the power grid, as well as the vibration acceleration of the wind turbine body. The control steps are as follows: when the absolute value of the difference is greater than zero, the energy storage vibration damping device is controlled to be in either a charging state or a discharging state. In the charging state, the power converter drives the rotating disk to rotate and store electrical energy. In the discharging state, the rotating disk drives the power converter to rotate and release electrical energy. When the absolute value of the difference is equal to zero, the power converter is controlled to drive the rotating disk to rotate relative to the mounting frame to a predetermined speed according to the vibration acceleration, so as to suppress the vibration of the fan body.

23. The control method according to claim 22, characterized in that, include: When the difference is greater than zero, the energy storage vibration damping device is controlled to be in a charging state, and the power converter drives the rotating disk to rotate and store electrical energy. When the difference is less than zero, the energy storage and vibration damping device is controlled to be in a discharge state, and the rotating disk drives the power converter to rotate and release electrical energy.

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