A vibration control method for a wind turbine and related apparatus

Abstract

The embodiment of the application discloses a wind turbine vibration control method and related device, in the target speed stage which is easy to affect the service life of the wind turbine, such as the cut-in speed stage or the rated speed stage, according to the target speed stage and the first speed of the target speed stage, the second speed different from the first speed is determined. When the target speed of the blade of the wind turbine is in the speed range identified by the first speed and the second speed, the target torque corresponding to the target speed can be determined based on the torque-speed matching relationship for optimizing the power generation. Thus, in the speed range, the corresponding torque can be dynamically determined based on the actual speed of the blade, as the basis for adjusting the generator torque of the wind turbine, so that the speed in the target speed stage is no longer constant, but gradually changes under the control of the torque, the excitation vibration caused by the blade rotation to the wind turbine will not be stable for a long time, avoiding the degree of tower resonance, and reducing the tower load.

Description

Technical Field

[0001] This application relates to the field of data processing, and in particular to a vibration control method and related apparatus for a wind turbine. Background Technology

[0002] Wind power generation is the process of converting the kinetic energy of wind into electrical energy using a wind turbine. The blades of a wind turbine generate electricity under the influence of wind.

[0003] During power generation, wind turbines have two speed phases: the cut-in speed phase and the rated speed phase. The cut-in speed phase is when the blade speed just begins to match the grid connection, while the rated speed phase is when the blade speed reaches the wind turbine's rated speed. For example... Figure 1 As shown, the horizontal axis represents rotor speed, used to indicate the rotational speed of the blades, and the vertical axis represents generator torque. The cut-in speed stage is... Figure 1 The portion marked AB indicates the rated speed range. Figure 1 The portion indicated by CD. In related technologies, as wind speed increases, the rotor speed is kept constant by increasing the generator torque in these two stages, thereby increasing power generation.

[0004] However, through constant speed control using related technologies, the vibrations that occur in the wind turbine during the two aforementioned stages can lead to increased tower loads, which can easily affect the service life of the wind turbine. Summary of the Invention

[0005] To address the aforementioned technical problems, this application provides a vibration control method and related device for wind turbines, which makes the rotational speed of the wind turbine no longer constant during the target speed stage, thereby avoiding the degree of tower resonance and reducing the tower load.

[0006] The embodiments of this application disclose the following technical solutions:

[0007] On one hand, embodiments of this application provide a vibration control method for a wind turbine, the method comprising:

[0008] Based on the target speed stage involved in the wind turbine and the first speed of the target speed stage, a second speed to be adjusted is determined. The target speed stage includes the cut-in speed stage or the rated speed stage. The first speed is different from the second speed.

[0009] When the target rotational speed of the wind turbine blades is within the rotational speed range identified by the first rotational speed and the second rotational speed, the target torque corresponding to the target rotational speed is determined according to the torque-speed matching relationship based on optimized power generation.

[0010] The generator torque of the wind turbine is adjusted to the target torque.

[0011] On the other hand, embodiments of this application provide a vibration control device for a wind turbine, the device comprising a first determining unit, a second determining unit, and an adjusting unit:

[0012] The first determining unit is used to determine the second speed to be adjusted based on the target speed stage involved in the wind turbine and the first speed of the target speed stage. The target speed stage includes the cut-in speed stage or the rated speed stage, and the first speed is different from the second speed.

[0013] The second determining unit is used to determine the target torque corresponding to the target speed based on the torque-speed matching relationship based on optimized power generation when the target speed of the wind turbine blades is within the speed range identified by the first speed and the second speed.

[0014] The adjustment unit is used to adjust the generator torque of the wind turbine to the target torque.

[0015] In another aspect, embodiments of this application provide a computer device, the computer device including a processor and a memory:

[0016] The memory is used to store program code and transmit the program code to the processor;

[0017] The processor is used to execute the methods described above according to the instructions in the program code.

[0018] In another aspect, embodiments of this application provide a computer-readable storage medium for storing a computer program for performing the methods described above.

[0019] As can be seen from the above technical solution, in the target speed stage that easily affects the service life of wind turbines, such as the cut-in speed stage or the rated speed stage, a second speed, different from the first speed, is determined based on the target speed stage and the first speed of that target speed stage. When the target speed of the wind turbine blades is within the speed range identified by the first and second speeds, the target torque corresponding to the target speed can be determined based on the torque-speed matching relationship for optimizing power generation. Thus, within this speed range, the corresponding torque can be dynamically determined based on the actual speed of the blades, and used as the basis for adjusting the generator torque of the wind turbine. This ensures that the speed in the target speed stage is no longer constant, but gradually changes under the control of torque. The excitation vibration caused by the blade rotation on the wind turbine will not be stable for a long time, avoiding the degree of tower resonance and reducing the tower load. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram illustrating the speed-torque relationship of a speed control method for a wind turbine generator set.

[0022] Figure 2 A flowchart of a vibration control method for a wind turbine provided in this application embodiment;

[0023] Figure 3 A schematic diagram illustrating the speed-torque relationship of a vibration control method for a wind turbine generator provided in this application embodiment;

[0024] Figure 4 A schematic diagram illustrating a method for determining a second rotational speed based on tower vibration acceleration, provided in an embodiment of this application;

[0025] Figure 5 A schematic diagram illustrating the speed-torque relationship of a vibration control method for a wind turbine generator provided in this application embodiment;

[0026] Figure 6 This is a structural diagram of a vibration control device for a wind turbine provided in an embodiment of this application. Detailed Implementation

[0027] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0028] like Figure 1The diagram illustrates the speed-torque relationship of a wind turbine generator speed control method, where AB denotes the cut-in speed stage and CD denotes the rated speed stage. It is evident that during the target speed stage of wind turbine operation, which includes both the cut-in speed stage and the rated speed stage, constant speed control is achieved by increasing generator torque as wind speed increases, thereby enhancing power generation. However, the tower shadow effect and reverse tower shadow effect inevitably exist between the wind turbine blades and the tower, causing frequent tower vibrations. The tower shadow effect is a negative consequence of wind turbine power generation; specifically, it refers to the change in flow field caused by wind flowing over the tower, which interferes with the airflow over the blades, resulting in the tower shadow effect. Since the forces are mutual, a reverse tower shadow effect also exists.

[0029] If constant speed control is used in the target speed range mentioned above, the speed frequency will be relatively constant. At the same time, the excitation frequency of the tower due to the tower shadow effect and the anti-tower shadow effect will also be relatively constant. That is, the excitation vibration of the wind turbine caused by the blade rotation is a stable excitation in the target speed range, which makes the tower resonance more likely and increases the tower load.

[0030] Therefore, this application provides a vibration control method for a wind turbine, which makes the wind turbine's rotational speed no longer constant during the target speed stage, thereby avoiding the degree of tower resonance and reducing the tower load.

[0031] The following examples illustrate this in detail:

[0032] Figure 2 A flowchart of a vibration control method for a wind turbine provided in this application embodiment is shown. The method includes:

[0033] S201: Determine the second speed to be adjusted based on the target speed stage involved in the wind turbine and the first speed of the target speed stage.

[0034] The target speed stage includes a cut-in speed stage or a rated speed stage, and the first speed is different from the second speed.

[0035] In the process of wind power generation, the target speed stages involved in wind turbines include the cut-in speed stage or the rated speed stage. The cut-in speed stage is the stage when the blade speed of the wind turbine just enters the grid connection stage, and the rated speed stage is the stage when the blade speed of the wind turbine reaches the rated speed of the wind turbine.

[0036] When a wind turbine is operating at a target speed, a second speed to be adjusted is determined based on the target speed and the first speed of the current target speed. The determined second speed differs from the first speed. Therefore, speed variation control of the wind turbine within the current target speed is achieved based on the first and second speeds. In other words, the first and second speeds identify the speed range of the wind turbine corresponding to the target speed.

[0037] In theory, the cut-in speed phase of a wind turbine is before the rated speed phase. That is, the wind turbine blade speed is just after it is connected to the grid, and its speed increases until it reaches the rated speed phase. Therefore, in one possible implementation, if the target speed phase includes the cut-in speed phase, the first speed is determined as the starting speed of the speed range, and the second speed is determined as the ending speed of the speed range, wherein the second speed is greater than the first speed.

[0038] like Figure 3 This is a schematic diagram of the speed-torque relationship of a vibration control method for a wind turbine provided in this application embodiment. AB can be used to identify the target speed stage, including the cut-in speed stage. That is, point A is the starting point of the cut-in speed stage, indicating grid connection, and the blade speed of the wind turbine at point A is the first speed; point B is the ending point of the cut-in speed stage, and the blade speed of the wind turbine at point B is the second speed.

[0039] In one possible implementation, if the target speed stage includes the cut-in speed stage, the first speed can be the cut-in speed of the wind turbine, which is determined based on the grid connection requirements for the current wind turbine. For example, for a specific model (wind turbine rotation frequency and other parameters), the first speed is determined to be 7.5 rpm based on the grid connection requirements.

[0040] Rated speed is a parameter selected during the production of wind turbines. Once the blade speed of a wind turbine reaches the rated speed, its speed must be controlled to prevent further increases to ensure normal operation. Therefore, theoretically, the rated speed should be the upper limit of the wind turbine blade speed. In one possible implementation, if the target speed range includes the rated speed range, the second speed is defined as the starting speed of the speed range, and the first speed is defined as the ending speed of the speed range, with the second speed being less than the first speed.

[0041] In one possible implementation, if the target speed range includes the rated speed range, then the first speed can be the rated speed of the wind turbine, which is selected based on the production design for the current wind turbine. For example, for a specific model, the first speed is determined to be 14 rpm at the current rotational frequency.

[0042] Because the wind turbine blades generate different excitation vibrations at different rotational speeds due to the tower shadow effect, these excitation vibrations cause the wind turbine tower to vibrate. Since there is a certain correlation between the rotational speed of the wind turbine blades and the vibrations they generate on the tower at that speed, in one possible implementation, S201 includes:

[0043] Based on the first rotational speed of the target rotational speed stage, the acceleration parameters of the rotational speed range in which the first rotational speed is located are determined. The acceleration parameters are used to identify the vibration acceleration of the wind turbine tower at different rotational speeds.

[0044] The second rotational speed is determined based on the value of the vibration acceleration corresponding to the acceleration parameter.

[0045] There is a certain correlation between the rotational speed of a wind turbine blade and the vibration it causes to the tower at that speed. For example, at a certain speed, tower resonance can occur, resulting in more severe tower vibration, and correspondingly, the tower's vibration acceleration is greater at that speed. Therefore, a second rotational speed to be adjusted can be determined based on the tower's vibration characteristics, allowing for control of the wind turbine based on both the first and second rotational speeds to minimize the degree of tower resonance.

[0046] Specifically, based on the first rotational speed of the target rotational speed range currently involved, the acceleration parameter of the rotational speed range in which the first rotational speed is located is determined. This acceleration parameter is used to identify the vibration acceleration of the tower in the rotational speed range. Further, based on the value of the vibration acceleration corresponding to the determined acceleration parameter, the second rotational speed is determined.

[0047] Figure 4 A method for determining a second rotational speed based on tower vibration acceleration is shown. In one possible implementation, the acceleration parameter can be the amplitude of the tower's vibration in the forward and backward directions within the rotational speed range of the first rotational speed. Figure 4 As shown, in the speed range of 7.5-8.5 rpm where the first speed (cut-in speed) is 7.5 rpm, the vibration amplitude of the tower is greater than that in the higher speed range (such as 9-11 rpm), and the tower vibration amplitude shows a trend of decreasing with the increase of speed. Therefore, the second speed can be determined based on the change of tower vibration amplitude.

[0048] Because wind turbines inevitably vibrate due to their natural frequencies during actual operation, one possible implementation involves determining a second rotational speed based on a preset threshold when the tower's vibration amplitude decreases to that threshold. The preset threshold for the tower's vibration amplitude can be determined based on the wind turbine's natural frequency. Figure 4 As shown in the marked area, the second rotational speed is determined to be approximately 8.5 rpm based on the above method.

[0049] As can be seen from the above, the first speed corresponds to the target speed stage involved in the current process. That is, different target speed stages correspond to different first speeds. The second speed is determined based on the target speed stage involved in the wind turbine and the first speed. Thus, speed change control of the wind turbine in the current target speed stage can be achieved based on the first speed and the second speed.

[0050] S202: When the target rotational speed of the wind turbine blades is within the rotational speed range identified by the first rotational speed and the second rotational speed, the target torque corresponding to the target rotational speed is determined according to the torque-speed matching relationship based on the optimized power generation.

[0051] S203: Adjust the generator torque of the wind turbine to the target torque.

[0052] During wind turbine operation, if the target rotational speed of the blades falls within the range indicated by a first rotational speed and a second rotational speed, the actual rotational speed of the blades needs to be controlled to change from the current speed to the target speed. Specifically, the target torque corresponding to the target speed can be determined based on the torque-speed matching relationship optimized for power generation, and the generator torque of the wind turbine can then be adjusted to this target torque. Thus, within this rotational speed range, the corresponding generator torque can be dynamically determined based on the actual rotational speed of the blades, and this determined generator torque can be used as the basis for generator torque adjustment control, achieving control of the blade rotational speed from the current speed to the target speed based on generator torque.

[0053] Based on the relationship between the blade speed and the generator torque of a wind turbine, in one possible implementation, the torque-speed matching relationship is expressed by the following formula:

[0054] T = Kopt * w 2

[0055] Where T is the generator torque, Kopt is the gain coefficient, and w is the blade speed.

[0056] In one possible implementation, when the wind turbine is in the target speed range, the start and end points of the current target speed range are first determined. Based on the current target speed range, the first speed, and the second speed, the blade speed and generator torque of the wind turbine at the start point and at the end point are determined. Furthermore, for any target speed value within the range, the corresponding target torque value is determined using torque matching relationships, and the generator torque of the wind turbine is adjusted to the target torque.

[0057] In one possible implementation, when the target speed stage is the cut-in speed stage of the wind turbine, see [reference needed]. Figure 3 In the AB segment shown, point A is the starting point of the cut-in speed stage, indicating grid connection. The speed at point A is the first speed, and the generator torque corresponding to the starting point is set to 0. Point B is the ending point of the cut-in speed stage, and the corresponding generator torque is set according to the torque-speed matching relationship mentioned above. Specifically, the gain coefficient Kopt is a constant value, and w is the angular velocity of the wind turbine blade at point B.

[0058] In one possible implementation, the value of w can be set according to the actual application of the wind turbine. For example, the value of the angular velocity w of the wind turbine blades at the end of the cut-in speed phase can be determined based on the wind turbine's own design parameters such as the current rotational frequency and environmental parameters such as the wind speed during operation.

[0059] For wind turbines with higher rotational frequencies, such as 3p, 6p, and 9p, the vibration caused by excitation may be more severe. Therefore, in one possible implementation, the start and end points of the target speed stage can be set further apart in the vibration control of wind turbines with higher rotational frequencies, providing more control variation space for the target speed stage. Specifically, this can be set according to the actual application of the wind turbine. For example, for a wind turbine vibrating at a certain 3p speed, the speed difference between the start and end points of the target speed stage is approximately 0.3-1.0 rpm, and the value of w can be set according to the specific application of the wind turbine.

[0060] For any target speed value within the speed range marked AB for the blade speed of a wind turbine, the target torque value corresponding to the target speed can be determined by linear interpolation based on the blade speed and generator torque at the starting point A and the blade speed and generator torque at the ending point B.

[0061] In one possible implementation, the torque difference between point B and point A is calculated, and the speed difference between point B and point A is calculated. Based on the torque difference and speed difference, the torque change rate or speed change rate within the AB interval is determined. Furthermore, for each target speed within the speed interval identified by AB, the target torque value corresponding to that target speed can be determined based on the torque change rate or speed change rate, as well as the blade speed and generator torque at point A or B. For example, for a current wind turbine, the first speed at the starting point A is equal to a cut-in speed of 7.5 rpm and the generator torque is 0 kNm. The second speed at the ending point B is equal to 8.5 rpm and the generator torque is approximately 400 kNm. Therefore, the torque change rate within the AB interval is calculated to be 400 kNm / rpm. Taking a point within the AB interval with a speed of 8 rpm, the generator torque at that point is calculated to be 200 kNm.

[0062] It should be noted that the torque change rate mentioned above refers to the rate of change of torque with respect to speed. Correspondingly, the speed change rate mentioned above refers to the rate of change of speed with respect to torque, not the rate of change of torque or speed with respect to time.

[0063] Therefore, within the speed range indicated by the first and second speeds, the corresponding torque can be dynamically determined based on the actual speed of the blades, and used as the basis for adjusting the generator torque of the wind turbine. This makes the speed at the target speed stage no longer constant, but gradually change under the control of torque. The excitation vibration of the wind turbine caused by the blade rotation will not be stable for a long time, thus avoiding the degree of tower resonance and reducing the tower load.

[0064] Considering that the operation of a wind turbine is affected differently by wind speed or generator torque as the blade rotation speed increases, one possible implementation could be to divide segment AB into a first sub-stage and a second sub-stage based on the rotational speed value. Control could then be performed at different torque or rotational speed change rates in the first and second sub-stages. For example, in the first sub-stage closer to the starting point A, control could be performed at a smaller torque or rotational speed change rate compared to the second sub-stage. It should be noted that this application does not impose any limitations on whether a constant rate of change control or a control scheme where the rate of change changes with the control process is used within the target rotational speed range.

[0065] It should be noted that the specific control methods described above for segment AB are merely examples to facilitate understanding of the control process of the vibration control method for a wind turbine provided in this application. Besides the cut-in speed phase of segment AB, for the rated speed phase, such as... Figure 3The CD shown can also be controlled using the above method; the control process can be found in [reference needed]. Figure 5 The JD segment is shown. This causes the wind turbine's rotational speed to no longer be constant during the rated speed range, but rather to gradually change under torque control. The excitation vibration caused by the blade rotation on the wind turbine will not remain stable for a long time, thus avoiding tower resonance and reducing tower load.

[0066] Different wind turbines have different speed ranges, and the larger the speed range (or the longer the speed range), the better its power generation performance. However, a larger speed range can lead to certain speed ranges that cause tower resonance. These speed ranges are defined as resonance speed ranges. To avoid tower resonance, the blade speed of the wind turbine must be controlled to prevent it from operating within these resonance speed ranges. Therefore, in one possible implementation, the target speed stage also includes a speed jump stage, which is a speed stage adjacent to the non-operating speed range of the wind turbine. The non-operating speed range of the wind turbine is used to identify the resonance speed range.

[0067] Since the speed jump phase is adjacent to the non-operating speed range of the wind turbine, in one possible implementation, if the first speed of the speed jump phase is before the non-operating speed range, the second speed is determined as the starting speed of the speed range, the first speed is determined as the ending speed of the speed range, and the second speed is less than the first speed; if the first speed of the speed jump phase is after the non-operating speed range, the first speed is determined as the starting speed of the speed range, the second speed is determined as the ending speed of the speed range, and the second speed is greater than the first speed.

[0068] Figure 5 This is a schematic diagram of the speed-torque relationship of a vibration control method for a wind turbine generator provided in an embodiment of this application, where DE denotes the non-operating speed range of the wind turbine generator. When the first speed during the speed jump phase is within the non-operating speed range, such as... Figure 5 The CD shown defines the first speed as the end speed of this phase and the second speed, which is lower than the first speed, as the start speed of this phase. Further control is performed based on the speed-torque relationship of JD as indicated by the start and end speeds. When the first speed of the speed jump phase falls within the non-operating speed range, such as... Figure 5 As shown in EF, the first speed is determined as the starting speed of this stage, and the second speed, which is greater than the first speed, is determined as the ending speed of this stage. Further control is performed based on the speed-torque relationship of EK indicated by the starting speed and the ending speed.

[0069] It is understood that the vibration control method for wind turbines with speed jump stages is basically the same as the aforementioned method embodiments, so relevant parts can be found in the descriptions of the aforementioned embodiments.

[0070] Therefore, in target speed ranges that can significantly impact the lifespan of wind turbines, such as the cut-in speed range or rated speed range, a second speed, different from the first speed, is determined based on the target speed range and the first speed within that range. When the target speed of the wind turbine blades falls within the speed range identified by the first and second speeds, the target torque corresponding to the target speed can be determined based on the torque-speed matching relationship for optimized power generation. Within this speed range, the corresponding torque can be dynamically determined based on the actual blade speed, serving as the basis for adjusting the wind turbine's generator torque. This ensures that the speed during the target range is no longer constant but gradually changes under torque control. The excitation vibration caused by blade rotation on the wind turbine does not remain stable for extended periods, avoiding tower resonance and reducing tower load.

[0071] Figure 6 This application provides a structural diagram of a vibration control device for a wind turbine generator, comprising a first determining unit 601, a second determining unit 602, and an adjusting unit 603.

[0072] The first determining unit 601 is used to determine the second speed to be adjusted based on the target speed stage involved in the wind turbine and the first speed of the target speed stage. The target speed stage includes the cut-in speed stage or the rated speed stage, and the first speed is different from the second speed.

[0073] The second determining unit 602 is used to determine the target torque corresponding to the target speed according to the torque-speed matching relationship based on the optimized power generation when the target speed of the wind turbine blades is within the speed range identified by the first speed and the second speed.

[0074] The adjustment unit 603 is used to adjust the generator torque of the wind turbine to the target torque.

[0075] In one possible implementation, the device further includes a third determining unit:

[0076] The third determining unit is configured to, if the target speed range includes the cut-in speed range, determine the first speed as the starting speed of the speed range and the second speed as the ending speed of the speed range, wherein the second speed is greater than the first speed;

[0077] The third determining unit is further configured to, if the target speed range includes the rated speed range, determine the second speed as the starting speed of the speed range and the first speed as the ending speed of the speed range, wherein the second speed is less than the first speed.

[0078] In one possible implementation, the first determining unit is further configured to determine the acceleration parameter of the rotational speed range in which the first rotational speed is located based on the first rotational speed of the target rotational speed stage, wherein the acceleration parameter is used to identify the vibration acceleration of the wind turbine tower at different rotational speeds;

[0079] The second rotational speed is determined based on the value of the vibration acceleration corresponding to the acceleration parameter.

[0080] In one possible implementation, the target speed stage further includes a speed jump stage, which is a speed stage adjacent to the non-operating speed range of the wind turbine. In this case, the third determining unit is further configured to determine the second speed as the starting speed of the speed range and the first speed as the ending speed of the speed range if the first speed of the speed jump stage is before the non-operating speed range, wherein the second speed is less than the first speed.

[0081] The third determining unit is further configured to, if the first speed during the speed jump phase is after the non-working speed range, determine the first speed as the starting speed of the speed range and the second speed as the ending speed of the speed range, wherein the second speed is greater than the first speed.

[0082] Therefore, in target speed ranges that can significantly impact the lifespan of wind turbines, such as the cut-in speed range or rated speed range, a second speed, different from the first speed, is determined based on the target speed range and the first speed within that range. When the target speed of the wind turbine blades falls within the speed range identified by the first and second speeds, the target torque corresponding to the target speed can be determined based on the torque-speed matching relationship for optimized power generation. Within this speed range, the corresponding torque can be dynamically determined based on the actual blade speed, serving as the basis for adjusting the wind turbine's generator torque. This ensures that the speed during the target range is no longer constant but gradually changes under torque control. The excitation vibration caused by blade rotation on the wind turbine does not remain stable for extended periods, avoiding tower resonance and reducing tower load.

[0083] In another aspect, embodiments of this application provide a computer device, the computer device including a processor and a memory:

[0084] The memory is used to store program code and transmit the program code to the processor;

[0085] The processor is used to execute the vibration control method for wind turbines provided in the above embodiments according to the instructions in the program code.

[0086] The computer device may include a terminal device or a server, and the aforementioned vibration control device for the wind turbine may be configured in the computer device.

[0087] In addition, this application embodiment also provides a storage medium for storing a computer program for executing the vibration control method for a wind turbine provided in the above embodiment.

[0088] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the device and system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments. The device and system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0089] It should be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0090] The above description is merely one specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Moreover, based on the implementation methods provided in the above aspects, this application can be further combined to provide more implementation methods. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A vibration control method for a wind turbine generator, characterized in that, The method includes: Based on the first rotational speed of the target rotational speed stage, the acceleration parameters of the rotational speed range in which the first rotational speed is located are determined. The target rotational speed stage includes the cut-in rotational speed stage or the rated rotational speed stage. The acceleration parameters are used to identify the vibration acceleration of the wind turbine tower at different rotational speeds. Based on the value of the vibration acceleration corresponding to the acceleration parameter, a second rotational speed is determined, wherein the first rotational speed is different from the second rotational speed; When the target rotational speed of the wind turbine blades is within the rotational speed range identified by the first rotational speed and the second rotational speed, the target torque corresponding to the target rotational speed is determined according to the torque-speed matching relationship based on optimized power generation. The generator torque of the wind turbine is adjusted to the target torque.

2. The method according to claim 1, characterized in that, The method further includes: If the target speed range includes the cut-in speed range, the first speed is determined as the starting speed of the speed range, the second speed is determined as the ending speed of the speed range, and the second speed is greater than the first speed. If the target speed range includes the rated speed range, the second speed is determined as the starting speed of the speed range, the first speed is determined as the ending speed of the speed range, and the second speed is less than the first speed.

3. The method according to claim 1, characterized in that, The target speed stage also includes a speed jump stage, which is a speed stage adjacent to the non-operating speed range of the wind turbine.

4. The method according to claim 3, characterized in that, The method further includes: If the first speed during the speed jump phase is before the non-working speed range, the second speed is determined as the starting speed of the speed range, the first speed is determined as the ending speed of the speed range, and the second speed is less than the first speed. If the first speed during the speed jump phase is after the non-working speed range, the first speed is determined as the starting speed of the speed range, and the second speed is determined as the ending speed of the speed range, wherein the second speed is greater than the first speed.

5. The method according to any one of claims 1-4, characterized in that, The torque-speed matching relationship is expressed by the following formula: Where T is the generator torque, Kopt is the gain coefficient, and w is the blade speed.

6. A vibration control device for a wind turbine generator, characterized in that, The device includes a first determining unit, a second determining unit, and an adjustment unit: The first determining unit is used to determine the acceleration parameter of the speed range in which the first speed is located based on the first speed of the target speed stage. The target speed stage includes the cut-in speed stage or the rated speed stage. The acceleration parameter is used to identify the vibration acceleration of the wind turbine tower at different speeds. Based on the value of the vibration acceleration corresponding to the acceleration parameter, a second speed is determined. The first speed is different from the second speed. The second determining unit is used to determine the target torque corresponding to the target speed based on the torque-speed matching relationship based on optimized power generation when the target speed of the wind turbine blades is within the speed range identified by the first speed and the second speed. The adjustment unit is used to adjust the generator torque of the wind turbine to the target torque.

7. The apparatus according to claim 6, characterized in that, The device further includes a third determining unit: The third determining unit is configured to, if the target speed range includes the cut-in speed range, determine the first speed as the starting speed of the speed range and the second speed as the ending speed of the speed range, wherein the second speed is greater than the first speed; The third determining unit is further configured to, if the target speed range includes the rated speed range, determine the second speed as the starting speed of the speed range and the first speed as the ending speed of the speed range, wherein the second speed is less than the first speed.

8. A computer device, characterized in that, The computer device includes a processor and memory: The memory is used to store program code and transmit the program code to the processor; The processor is configured to execute the method described in any one of claims 1-5 according to the instructions in the program code.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium is used to store a computer program for performing the method according to any one of claims 1-5.

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