A control method for a wind power generator and related device

Abstract

Embodiments of the present application disclose a control method for a wind driven generator and a related device. A processing device can acquire acceleration data corresponding to the wind driven generator, and determine a sustained overrun threshold corresponding to the wind driven generator. The processing device can determine whether the acceleration data satisfies a sustained abnormal condition in a unit time according to the sustained overrun threshold. If the sustained abnormal condition is satisfied, it indicates that the wind driven generator is in an abnormal operating state. Since the abnormal state is still within the bearing range of the wind driven generator, but long-term operation in the abnormal state will cause wear and tear to the wind driven generator. Therefore, the processing device can not directly shut down the wind driven generator, but first performs load reduction processing to control the wind driven generator to enter a first load reduction control mode, so as to reduce the load of the wind driven generator, attenuate the vibration of the unit, avoid shutdown due to excessive acceleration data, and further reduce the loss of the wind driven generator, and prolong the service life of the engine.

Description

Technical Field

[0001] This application relates to the field of wind power generation technology, and in particular to a method and related apparatus for wind turbine generators. Background Technology

[0002] Wind power is one of the important sources of clean energy. Wind power generation is mainly carried out through wind turbines. Therefore, in order to ensure a stable supply of wind power, it is necessary to monitor the operating status of wind turbines and ensure their stable operation.

[0003] In related technologies, a fault threshold can be set for wind turbines. When the detected value of the wind turbine exceeds the fault threshold, the wind turbine will be shut down directly. This wind turbine control method can easily damage the wind turbine. Summary of the Invention

[0004] To address the aforementioned technical problems, this application provides a control method for wind turbines. The processing equipment can reduce the losses to wind turbines and extend their service life while ensuring stable operation.

[0005] The embodiments of this application disclose the following technical solutions:

[0006] In a first aspect, embodiments of this application disclose a control method for a wind turbine generator, the method comprising:

[0007] Obtain the acceleration data corresponding to the wind turbine;

[0008] Determine the continuous over-limit threshold corresponding to the wind turbine;

[0009] Based on the continuous over-limit threshold, it is determined whether the acceleration data meets the continuous abnormal condition within a unit of time.

[0010] In response to the acceleration data meeting the continuous abnormal condition within the unit time, the wind turbine is controlled to enter the first load reduction control mode.

[0011] In one possible implementation, determining whether the acceleration data meets the continuous abnormal condition within a unit time period based on the continuous exceedance threshold includes:

[0012] Determine the total number of peaks in the acceleration data within the unit time, and determine the number of abnormal peaks in the acceleration data within the unit time whose peak value is greater than the sustained over-limit threshold;

[0013] If the ratio of the number of abnormal peaks to the total number of peaks exceeds the threshold for the proportion of exceeding limits, it is determined that the acceleration data meets the condition of continuous abnormality within the unit time.

[0014] If the ratio of the number of abnormal peaks to the total number of peaks does not exceed the threshold for the proportion of exceeding limits, it is determined that the acceleration data does not meet the continuous abnormal condition within the unit time.

[0015] In one possible implementation, the method further includes:

[0016] Determine the instantaneous over-limit threshold corresponding to the wind turbine, wherein the instantaneous over-limit threshold is greater than the continuous over-limit threshold;

[0017] In response to the acceleration data exceeding the instantaneous over-limit threshold, the wind turbine is controlled to enter the second load reduction control mode.

[0018] In one possible implementation, the method further includes:

[0019] In response to the acceleration data exceeding the limit protection threshold, the wind turbine is controlled to shut down for protection. The limit protection threshold is greater than the instantaneous over-limit threshold, and the limit protection threshold is determined based on the tower limit load corresponding to the wind turbine.

[0020] In one possible implementation, the method further includes:

[0021] In response to the acceleration data meeting the continuous abnormal condition within the unit time and the wind turbine being in the first load reduction control mode, the wind turbine is controlled to perform shutdown protection.

[0022] In one possible implementation, the persistent over-limit threshold is obtained in the following way:

[0023] Obtain the simulated acceleration data of the wind turbine under the simulation experiment;

[0024] Based on the actual operating environment corresponding to the wind turbine, a data deviation coefficient is determined. The data deviation coefficient is used to identify the difference between the simulation environment of the simulation experiment and the actual operating environment.

[0025] The sustained over-limit threshold is determined based on the data deviation coefficient and the simulated acceleration data.

[0026] In one possible implementation, the sustained exceedance threshold includes multiple thresholds, each being a different threshold corresponding to a different unit of time. The step of determining whether the acceleration data meets the sustained abnormality condition within a unit of time based on the sustained exceedance threshold includes:

[0027] Based on the continuous over-limit threshold, determine whether the acceleration data meets the continuous abnormal condition within the unit time corresponding to the continuous over-limit threshold.

[0028] Secondly, embodiments of this application disclose a control device for a wind turbine generator, the device comprising an acquisition unit, a first determination unit, a judgment unit, and a first response unit:

[0029] The acquisition unit is used to acquire acceleration data corresponding to the wind turbine.

[0030] The first determining unit is used to determine the continuous over-limit threshold corresponding to the wind turbine.

[0031] The judgment unit is used to determine whether the acceleration data meets the continuous abnormal condition within a unit of time based on the continuous over-limit threshold.

[0032] The first response unit is configured to control the wind turbine to enter a first load reduction control mode in response to the acceleration data meeting the continuous abnormal condition within the unit time.

[0033] In one possible implementation, the determining unit is specifically used for:

[0034] Determine the total number of peaks in the acceleration data within the unit time, and determine the number of abnormal peaks in the acceleration data within the unit time whose peak value is greater than the sustained over-limit threshold;

[0035] If the ratio of the number of abnormal peaks to the total number of peaks exceeds the threshold for the proportion of exceeding limits, it is determined that the acceleration data meets the condition of continuous abnormality within the unit time.

[0036] If the ratio of the number of abnormal peaks to the total number of peaks does not exceed the threshold for the proportion of exceeding limits, it is determined that the acceleration data does not meet the continuous abnormal condition within the unit time.

[0037] In one possible implementation, the device further includes a second determining unit and a second responding unit:

[0038] The second determining unit is used to determine the instantaneous over-limit threshold corresponding to the wind turbine, wherein the instantaneous over-limit threshold is greater than the continuous over-limit threshold;

[0039] The second response unit is used to control the wind turbine to enter the second load reduction control mode in response to the acceleration data exceeding the instantaneous over-limit threshold.

[0040] In one possible implementation, the device further includes a third response unit:

[0041] The third response unit is used to control the wind turbine to perform shutdown protection in response to the acceleration data exceeding the limit protection threshold. The limit protection threshold is greater than the instantaneous over-limit threshold, and the limit protection threshold is determined based on the tower limit load corresponding to the wind turbine.

[0042] In one possible implementation, the device further includes a fourth response unit:

[0043] The fourth response unit is used to control the wind turbine to perform shutdown protection in response to the acceleration data meeting the continuous abnormal condition within the unit time and the wind turbine being in the first load reduction control mode.

[0044] In one possible implementation, the persistent over-limit threshold is obtained in the following way:

[0045] Obtain the simulated acceleration data of the wind turbine under the simulation experiment;

[0046] Based on the actual operating environment corresponding to the wind turbine, a data deviation coefficient is determined. The data deviation coefficient is used to identify the difference between the simulation environment of the simulation experiment and the actual operating environment.

[0047] The sustained over-limit threshold is determined based on the data deviation coefficient and the simulated acceleration data.

[0048] In one possible implementation, the continuous over-limit threshold includes multiple thresholds, each being a different threshold corresponding to a different unit of time. The judgment unit is specifically used for:

[0049] Based on the continuous over-limit threshold, determine whether the acceleration data meets the continuous abnormal condition within the unit time corresponding to the continuous over-limit threshold.

[0050] Thirdly, embodiments of this application disclose a computer-readable storage medium in which, when the instructions in the computer-readable storage medium are executed by at least one processor, the at least one processor performs the control method for a wind turbine as described in any of the first aspects.

[0051] Fourthly, embodiments of this application disclose a computer device, including:

[0052] At least one processor;

[0053] At least one memory that stores computer-executable instructions.

[0054] Wherein, when the computer device executes instructions, the at least one processor performs the control method for a wind turbine as described in any of the first aspects.

[0055] As can be seen from the above technical solution, when controlling a wind turbine, the processing equipment can first acquire the acceleration data corresponding to the wind turbine and determine the corresponding continuous over-limit threshold. This continuous over-limit threshold is used to analyze whether the operating state of the wind turbine is abnormal. The processing equipment can determine whether the acceleration data meets the continuous abnormal condition within a unit of time based on this continuous over-limit threshold. If it does, it indicates that the wind turbine is currently in an abnormal operating state. Since this abnormal state is still within the wind turbine's tolerance range, but prolonged exposure to this abnormal state will cause wear and tear on the wind turbine, the processing equipment can avoid directly shutting down the wind turbine. Instead, it can first perform load reduction processing, controlling the wind turbine to enter the first load reduction control mode, thereby reducing the load on the wind turbine, attenuating unit vibration, avoiding shutdown due to excessively high acceleration data, and thus reducing wear and tear on the wind turbine and extending its service life. Attached Figure Description

[0056] 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.

[0057] Figure 1 A flowchart of a control method for a wind turbine provided in this application embodiment;

[0058] Figure 2 A schematic diagram illustrating a control method for a wind turbine generator provided in an embodiment of this application;

[0059] Figure 3 A schematic diagram illustrating a control method for a wind turbine generator provided in an embodiment of this application;

[0060] Figure 4 This is a structural block diagram of a control device for a wind turbine generator provided in an embodiment of this application. Detailed Implementation

[0061] The embodiments of this application will now be described with reference to the accompanying drawings.

[0062] Understandably, this method can be applied to processing devices capable of data analysis and processing. In one example, the processing device could be the main controller of a wind turbine, which can control the wind turbine based on the acquired wind turbine data. In another example, the processing device could be the field-level controller of the wind farm where the wind turbine is located, which can generate corresponding control commands based on the acquired wind turbine data and send the control commands to the main controller of the wind turbine so that the main controller can control the wind turbine based on the control commands. In yet another example, the processing device could also be a terminal device or server, such as a computer, which can control the wind turbine based on the data corresponding to the wind turbine.

[0063] See Figure 1 , Figure 1 A flowchart of a control method for a wind turbine provided in this application embodiment, the method including:

[0064] S101: Obtain the acceleration data corresponding to the wind turbine.

[0065] This acceleration data is used to reflect the vibration of the wind turbine, which in turn reflects its operating status. Specifically, this acceleration data can be the effective acceleration value corresponding to the wind turbine, which is determined by the acceleration in the forward and backward and left-right directions of the wind turbine, using the following formula:

[0066]

[0067] Where A is the effective value of acceleration, x is the acceleration value in the forward and backward direction, and y is the acceleration value in the left and right direction.

[0068] S102: Determine the continuous over-limit threshold corresponding to the wind turbine.

[0069] The continuous over-limit threshold is used to determine whether the wind turbine has been operating under high load for an extended period. It's understood that when the wind turbine is under high load, its vibration amplitude will be greater, and the corresponding acceleration data will be higher. Of course, this continuous over-limit threshold is lower than the corresponding instantaneous over-limit threshold, which is used to determine whether the wind turbine is overloaded and requires shutdown.

[0070] S103: Based on the continuous over-limit threshold, determine whether the acceleration data meets the continuous abnormal condition within a unit of time.

[0071] It is understandable that when a wind turbine operates continuously under high load, even if it has not yet reached the point where it must be shut down, it will still cause some wear and tear on the turbine. Therefore, the processing equipment can determine whether the acceleration data meets the continuous abnormal condition within a unit of time based on this continuous over-limit threshold. This continuous abnormal condition is used to determine whether the wind turbine meets the condition of prolonged high load operation. This unit of time is determined based on the operating characteristics of the wind turbine.

[0072] S104: In response to the acceleration data meeting the continuous abnormal condition within a unit of time, control the wind turbine to enter the first load reduction control mode.

[0073] If the processing equipment determines that the acceleration data meets the continuous abnormal conditions within a unit of time, it can be concluded that the wind turbine has been under high load for an extended period, increasing the probability of wear and shutdown. In this case, the processing equipment can reduce the load on the wind turbine, putting it into a lower-load first load reduction control mode. The load in this first load reduction control mode is lower than the load the wind turbine was under before entering this mode. Therefore, by reducing the load on the wind turbine, the oscillation of the wind turbine is reduced, thereby reducing wear and the probability of shutdown.

[0074] As can be seen from the above technical solution, when controlling a wind turbine, the processing equipment can first acquire the acceleration data corresponding to the wind turbine and determine the corresponding continuous over-limit threshold. This continuous over-limit threshold is used to analyze whether the operating state of the wind turbine is abnormal. The processing equipment can determine whether the acceleration data meets the continuous abnormal condition within a unit of time based on this continuous over-limit threshold. If it does, it indicates that the wind turbine is currently in an abnormal operating state. Since this abnormal state is still within the wind turbine's tolerance range, but prolonged exposure to this abnormal state will cause wear and tear on the wind turbine, the processing equipment can avoid directly shutting down the wind turbine. Instead, it can first perform load reduction processing, controlling the wind turbine to enter the first load reduction control mode, thereby reducing the load on the wind turbine, attenuating unit vibration, avoiding shutdown due to excessively high acceleration data, and thus reducing wear and tear on the wind turbine and extending its service life.

[0075] Specifically, in one possible implementation, the processing device can determine the total number of peaks in the acceleration data within a unit time, and the number of abnormal peaks in the acceleration data within a unit time whose peak value exceeds a sustained over-limit threshold. If the ratio of the number of abnormal peaks to the total number of peaks exceeds the over-limit percentage threshold, it indicates that the acceleration data is in a high-level state for a considerable period of time within the unit time. In this case, the processing device can determine that the acceleration data meets the sustained abnormality condition within the unit time. If the ratio of the number of abnormal peaks to the total number of peaks does not exceed the over-limit percentage threshold, it is determined that the acceleration data does not meet the sustained abnormality condition within the unit time.

[0076] like Figure 2 As shown, Figure 2 This is a schematic diagram of a control method for a wind turbine provided in an embodiment of this application. The processing device can acquire the effective acceleration value obtained by the acceleration sensor in real time, and then count the effective acceleration value peaks through an acceleration effective value peak counting unit, denoted as variable a, and count the peaks where the effective acceleration value peak value is greater than the continuous over-limit threshold, denoted as variable b. Through a 60s counter, the processing device can determine whether the value of b / a exceeds the effective value over-limit percentage threshold. If it exceeds, acceleration fatigue protection is triggered, and the first load reduction control mode is entered; if it does not exceed, the calculation is recalculated.

[0077] In one possible implementation, to further enhance the protection capability of the wind turbine, the processing device can also set an instantaneous over-limit threshold for the wind turbine. This instantaneous over-limit threshold is determined based on the maximum acceleration value during the wind turbine's operation and is used to determine whether the load corresponding to the wind turbine exceeds the maximum acceleration value. This instantaneous over-limit threshold is greater than a sustained over-limit threshold. The processing device can determine the instantaneous over-limit threshold for the wind turbine and then make a judgment based on the acceleration data. In response to the acceleration data exceeding the instantaneous over-limit threshold, the processing device can control the wind turbine to enter a second load reduction control mode. The load of the wind turbine in the second load reduction control mode is lower than that in the first load reduction control mode. It is understood that because the instantaneous over-limit threshold is relatively high, when the acceleration data exceeds this threshold, it indicates that the current acceleration is too high. The processing device can directly determine that the wind turbine has a relatively serious operational problem. At this time, the processing device can control the generator to enter a lower load operating state to protect the wind turbine.

[0078] In one possible implementation, the processing device can determine the corresponding limit protection threshold for the wind turbine based on the tower load limit of the wind turbine. This limit protection threshold refers to the limit of acceleration data that the wind turbine can withstand, and this limit protection threshold is greater than the instantaneous over-limit threshold. Therefore, in response to the acceleration data exceeding the limit protection threshold, the processing device can control the wind turbine to perform shutdown protection to ensure that the tower load does not exceed the design limit.

[0079] Similarly, in one possible implementation, in response to the acceleration data meeting the continuous abnormal condition within a unit of time and the wind turbine being in the first load reduction control mode, it indicates that the wind turbine has been in a relatively abnormal working state for a long time. At this time, the processing equipment can control the wind turbine to perform shutdown protection to prevent further wear and tear on the wind turbine.

[0080] like Figure 3 As shown, Figure 3 This is a schematic diagram of a wind turbine control method provided in an embodiment of this application. The processing device can acquire the effective acceleration value obtained by the acceleration sensor in real time. If the acceleration fatigue protection continuous over-limit trigger flag is TRUE, it means that the effective acceleration value meets the continuous abnormal condition. At this time, the processing device can determine whether the wind turbine is in the process of load reduction control due to continuous over-limit acceleration fatigue protection, that is, whether it has entered the first load reduction control mode. If yes, the processing device can perform the continuous over-limit acceleration fatigue protection fault shutdown processing. If no, the pitch angle and power limit are increased to enter the load reduction control, and the load reduction control mode is output as 2, that is, the first load reduction control mode.

[0081] If it is not TRUE, then it checks whether the effective value of acceleration is greater than the instantaneous over-limit threshold of acceleration fatigue protection. If it is, it checks whether the unit is currently in the load reduction control process due to instantaneous over-limit of acceleration fatigue protection, i.e., whether it is in the second load reduction control mode. If it is, it continues to maintain the current load reduction control mode. If it is not, it issues a warning and increases the pitch angle, limits power to enter load reduction control, and outputs load reduction control mode 1 (i.e., the second load reduction control mode). If the effective value of acceleration is detected to be greater than the acceleration limit protection threshold, then acceleration limit protection fault shutdown processing can be performed.

[0082] It is understandable that the testing scenarios for wind turbines may differ from actual operating scenarios. Therefore, to ensure the accuracy of wind turbine control, the processing equipment can first obtain the simulated acceleration data of the wind turbine under simulation experiments when determining the threshold. Then, based on the actual operating environment of the wind turbine, a data deviation coefficient is determined. This data deviation coefficient is used to identify the difference between the simulation environment and the actual operating environment in which the simulation delay occurs. The processing equipment can determine the continuous over-limit threshold based on this data deviation coefficient and the simulated acceleration data. For example, this data deviation coefficient can be 0.6 to 0.9, referring to 0.6 to 0.9 times the maximum effective value of acceleration under normal power generation conditions statistically obtained from simulation design, or adjusted according to the design margin of the actual wind parameter computer tower fatigue load.

[0083] Similarly, other parameter thresholds can also be determined in this way. For example, the instantaneous over-limit threshold can be determined by referring to the maximum effective value of the acceleration amplitude statistically obtained from simulation design under normal power generation conditions. Considering the certain differences between actual on-site operation and simulation, a magnification factor of 1.15 to 1.2 times can be used. The unit time is determined by considering that the tower modal frequency of a typical wind turbine generator is between 0.12 and 0.4 Hz, i.e., the vibration period is between 2.5 s and 8.3 s, therefore it can be set to 60 s.

[0084] Furthermore, to achieve more precise control of wind turbines, one possible implementation is that the processing device can set multiple continuous over-limit thresholds for the wind turbine. These thresholds can be varied, each corresponding to a different unit of time. The processing device can then determine whether the acceleration data meets the continuous abnormal conditions within the unit of time corresponding to the threshold, allowing for more flexible assessment of the wind turbine. For example, a higher continuous over-limit threshold indicates a higher probability of damage to the wind turbine, resulting in a shorter unit of time; conversely, a lower threshold indicates a lower probability of damage, allowing for a longer unit of time. For instance, triggering control of the wind turbine after the peak value of the effective acceleration value continuously exceeds 0.1g for 10 seconds, 0.08g for 30 seconds, and 0.06g for 60 seconds.

[0085] Furthermore, the acceleration data in this application can be either obtained by combining the acceleration in the front-back and left-right directions to obtain the effective acceleration value, or the effective acceleration values ​​in the front-back and left-right directions can be judged separately. If either one meets the threshold condition, load reduction or shutdown control can be performed.

[0086] Based on the control method for wind turbines provided in the above embodiments, this application also provides a control device for wind turbines. See [link to relevant documentation]. Figure 4 , Figure 4 This application provides a structural block diagram of a control device 400 for a wind turbine generator, which includes an acquisition unit 401, a first determination unit 402, a judgment unit 403, and a first response unit 404.

[0087] The acquisition unit 401 is used to acquire acceleration data corresponding to the wind turbine generator;

[0088] The first determining unit 402 is used to determine the continuous over-limit threshold corresponding to the wind turbine.

[0089] The judgment unit 403 is used to determine whether the acceleration data meets the continuous abnormal condition within a unit time according to the continuous over-limit threshold.

[0090] The first response unit 404 is used to control the wind turbine to enter the first load reduction control mode in response to the acceleration data meeting the continuous abnormal condition within the unit time.

[0091] In one possible implementation, the determination unit 403 is specifically used for:

[0092] Determine the total number of peaks in the acceleration data within the unit time, and determine the number of abnormal peaks in the acceleration data within the unit time whose peak value is greater than the sustained over-limit threshold;

[0093] If the ratio of the number of abnormal peaks to the total number of peaks exceeds the threshold for the proportion of exceeding limits, it is determined that the acceleration data meets the condition of continuous abnormality within the unit time.

[0094] If the ratio of the number of abnormal peaks to the total number of peaks does not exceed the threshold for the proportion of exceeding limits, it is determined that the acceleration data does not meet the continuous abnormal condition within the unit time.

[0095] In one possible implementation, the device further includes a second determining unit and a second responding unit:

[0096] The second determining unit is used to determine the instantaneous over-limit threshold corresponding to the wind turbine, wherein the instantaneous over-limit threshold is greater than the continuous over-limit threshold;

[0097] The second response unit is used to control the wind turbine to enter the second load reduction control mode in response to the acceleration data exceeding the instantaneous over-limit threshold.

[0098] In one possible implementation, the device further includes a third response unit:

[0099] The third response unit is used to control the wind turbine to perform shutdown protection in response to the acceleration data exceeding the limit protection threshold. The limit protection threshold is greater than the instantaneous over-limit threshold, and the limit protection threshold is determined based on the tower limit load corresponding to the wind turbine.

[0100] In one possible implementation, the device further includes a fourth response unit:

[0101] The fourth response unit is used to control the wind turbine to perform shutdown protection in response to the acceleration data meeting the continuous abnormal condition within the unit time and the wind turbine being in the first load reduction control mode.

[0102] In one possible implementation, the persistent over-limit threshold is obtained in the following way:

[0103] Obtain the simulated acceleration data of the wind turbine under the simulation experiment;

[0104] Based on the actual operating environment corresponding to the wind turbine, a data deviation coefficient is determined. The data deviation coefficient is used to identify the difference between the simulation environment of the simulation experiment and the actual operating environment.

[0105] The sustained over-limit threshold is determined based on the data deviation coefficient and the simulated acceleration data.

[0106] In one possible implementation, the continuous over-limit threshold includes multiple thresholds, each being a different threshold corresponding to a different unit of time. The judgment unit 403 is specifically used for:

[0107] Based on the continuous over-limit threshold, determine whether the acceleration data meets the continuous abnormal condition within the unit time corresponding to the continuous over-limit threshold.

[0108] This application also provides a computer-readable storage medium, wherein when the instructions in the computer-readable storage medium are executed by at least one processor, the at least one processor performs the control method for a wind turbine described in any of the above embodiments.

[0109] This application also provides a computer device, including:

[0110] At least one processor;

[0111] At least one memory that stores computer-executable instructions.

[0112] When the computer device executes instructions, the at least one processor performs the control method for a wind turbine as described in any of the above embodiments.

[0113] Those skilled in the art will understand that all or part of the steps of the above method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it performs the steps of the above method embodiments. The aforementioned storage medium can be at least one of the following media: read-only memory (ROM), RAM, magnetic disk, or optical disk, etc., and other media capable of storing program code.

[0114] It should be noted that the various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, for the device and system embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the description of 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, and 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 the solution in this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0115] 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. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A control method for a wind turbine generator, characterized in that, The method includes: Obtain the acceleration data corresponding to the wind turbine; A continuous over-limit threshold corresponding to the wind turbine is determined, wherein the continuous over-limit threshold is lower than the instantaneous over-limit threshold corresponding to the wind turbine, and the instantaneous over-limit threshold is used to determine whether the wind turbine needs to be shut down. Based on the continuous over-limit threshold, it is determined whether the acceleration data meets the continuous abnormal condition within a unit of time. In response to the acceleration data meeting the continuous abnormal condition within the unit time, the wind turbine is controlled to enter the first load reduction control mode; Determine the instantaneous over-limit threshold corresponding to the wind turbine, wherein the instantaneous over-limit threshold is greater than the continuous over-limit threshold; In response to the acceleration data exceeding the instantaneous over-limit threshold, the wind turbine is controlled to enter a second load reduction control mode, where the load on the wind turbine is lower than that in the first load reduction control mode. The step of determining whether the acceleration data meets the continuous abnormal condition within a unit time based on the continuous exceeding threshold includes: Determine the total number of peaks in the acceleration data within the unit time, and determine the number of abnormal peaks in the acceleration data within the unit time whose peak value is greater than the sustained over-limit threshold; If the ratio of the number of abnormal peaks to the total number of peaks exceeds the threshold for the proportion of exceeding limits, it is determined that the acceleration data meets the condition of continuous abnormality within the unit time. If the ratio of the number of abnormal peaks to the total number of peaks does not exceed the threshold for the proportion of exceeding limits, it is determined that the acceleration data does not meet the continuous abnormal condition within the unit time.

2. The method according to claim 1, characterized in that, The method further includes: In response to the acceleration data exceeding the limit protection threshold, the wind turbine is controlled to shut down for protection. The limit protection threshold is greater than the instantaneous over-limit threshold, and the limit protection threshold is determined based on the tower limit load corresponding to the wind turbine.

3. The method according to claim 1, characterized in that, The method further includes: In response to the acceleration data meeting the continuous abnormal condition within the unit time and the wind turbine being in the first load reduction control mode, the wind turbine is controlled to perform shutdown protection.

4. The method according to claim 1, characterized in that, The sustained over-limit threshold is obtained through the following method: Obtain the simulated acceleration data of the wind turbine under the simulation experiment; Based on the actual operating environment corresponding to the wind turbine, a data deviation coefficient is determined. The data deviation coefficient is used to identify the difference between the simulation environment of the simulation experiment and the actual operating environment. The sustained over-limit threshold is determined based on the data deviation coefficient and the simulated acceleration data.

5. The method according to claim 1, characterized in that, The continuous exceedance thresholds include multiple thresholds, each with a different corresponding unit time. The step of determining whether the acceleration data meets the continuous abnormality condition within a unit time based on the continuous exceedance thresholds includes: Based on the continuous over-limit threshold, determine whether the acceleration data meets the continuous abnormal condition within the unit time corresponding to the continuous over-limit threshold.

6. A control device for a wind turbine generator, characterized in that, The device includes an acquisition unit, a first determination unit, a judgment unit, and a first response unit: The acquisition unit is used to acquire acceleration data corresponding to the wind turbine. The first determining unit is used to determine the continuous over-limit threshold corresponding to the wind turbine, the continuous over-limit threshold being lower than the instantaneous over-limit threshold corresponding to the wind turbine, and the instantaneous over-limit threshold being used to determine whether the wind turbine needs to be shut down. The judgment unit is used to determine whether the acceleration data meets the continuous abnormal condition within a unit of time based on the continuous over-limit threshold. The first response unit is configured to control the wind turbine to enter a first load reduction control mode in response to the acceleration data meeting the continuous abnormal condition within the unit time. The device further includes a second determining unit and a second responding unit: The second determining unit is used to determine the instantaneous over-limit threshold corresponding to the wind turbine, wherein the instantaneous over-limit threshold is greater than the continuous over-limit threshold; The second response unit is used to control the wind turbine to enter a second load reduction control mode in response to the acceleration data exceeding the instantaneous over-limit threshold. The load of the wind turbine corresponding to the second load reduction control mode is lower than that of the first load reduction control mode. The judgment unit is specifically used for: Determine the total number of peaks in the acceleration data within the unit time, and determine the number of abnormal peaks in the acceleration data within the unit time whose peak value is greater than the sustained over-limit threshold; If the ratio of the number of abnormal peaks to the total number of peaks exceeds the threshold for the proportion of exceeding limits, it is determined that the acceleration data meets the condition of continuous abnormality within the unit time. If the ratio of the number of abnormal peaks to the total number of peaks does not exceed the threshold for the proportion of exceeding limits, it is determined that the acceleration data does not meet the continuous abnormal condition within the unit time.

7. A computer-readable storage medium, characterized in that, When the instructions in the computer-readable storage medium are executed by at least one processor, the at least one processor performs the control method for a wind turbine as described in any one of claims 1-5.

8. A computer device, characterized in that, include: At least one processor; At least one memory that stores computer-executable instructions. Wherein, when the computer device executes instructions, the at least one processor performs the control method for a wind turbine as described in any one of claims 1-5.

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