Wind farm method, device and wind farm unit system for preventing tower scanning

Abstract

The application relates to a wind farm tower scanning prevention method and device and a wind farm unit system, and relates to the technical field of wind power systems.The wind farm tower scanning prevention method comprises the following steps: acquiring current operation data and first reference operation data of each unit in a target wind farm; outputting a first signal or a second signal according to the current operation data, the first reference operation data and a first preset data threshold; and if the first signal is output, executing a wind farm overall protection strategy.The wind farm tower scanning prevention method, device and wind farm unit system provided in the application can accurately identify the time node of a cold wave attack, timely take countermeasures and eliminate safety hazards.

Description

Technical Field

[0001] This application relates to the field of wind power system technology, specifically to a method, device, and wind farm unit system for preventing tower sweeping in wind farms. Background Technology

[0002] For wind farms, the arrival of cold waves causes drastic changes in environmental parameters, easily leading to adverse operating conditions. Wind turbines are prone to tower sweeping issues, posing serious safety hazards. Furthermore, current technologies cannot accurately identify the timing of cold waves, resulting in delayed response measures and further safety risks. Summary of the Invention

[0003] To address the aforementioned technical problems, embodiments of this application provide a method, device, and wind farm turbine system for preventing tower sweeping in wind farms. These systems can accurately identify the timing of cold waves and take timely measures to eliminate potential safety hazards.

[0004] Firstly, a method for preventing tower sweeping in wind farms is provided, including:

[0005] Acquire the current operating data and first reference operating data for each turbine in the target wind farm; wherein, the current operating data includes the current ambient temperature, current negative shear ratio, current wind speed, and current wind direction angle; the first reference operating data includes the first reference ambient temperature, first reference negative shear ratio, first reference wind speed, and first reference wind direction angle; the time node corresponding to the first reference operating data differs from the time node corresponding to the current operating data by a first preset time period;

[0006] Based on the current operating data, the first reference operating data, and the first preset data threshold, a first signal or a second signal is output; wherein, the first preset data threshold includes a first preset ambient temperature threshold, a first preset negative shear ratio threshold, a first preset wind speed threshold, and a first preset wind direction angle threshold; the first signal represents the signal of an approaching cold wave; the second signal represents the signal of an approaching cold wave.

[0007] If the first signal is output, the overall protection strategy for the wind farm is executed.

[0008] According to a first aspect of this application, the execution of the overall wind farm protection strategy upon outputting the first signal includes:

[0009] If the first signal is output, the detection signals output by the two main shaft distance sensors of each unit are obtained;

[0010] Based on the detection signal, the position deviation value of the two main shafts of each unit is obtained;

[0011] If the position deviation value of the units exceeds a first preset deviation threshold by more than a preset proportion, the overall protection strategy of the wind farm is executed.

[0012] According to a first aspect of this application, after implementing the overall wind farm protection strategy, the wind farm tower sweep prevention method further includes:

[0013] If the position deviation value of all the units is less than or equal to the second preset deviation threshold, the overall protection strategy of the wind farm is exited.

[0014] According to a first aspect of this application, the step of outputting a first signal or a second signal based on the current operating data, the first reference operating data, and a first preset data threshold includes:

[0015] If at least one of the units satisfies the first condition, the first signal is output; wherein, the first condition indicates that the change between the current ambient temperature and the first reference ambient temperature is greater than the first preset ambient temperature threshold, the change between the current negative shear ratio and the first reference negative shear ratio is greater than the first preset negative shear ratio threshold, the change between the current wind speed and the first reference wind speed is greater than the first preset wind speed threshold, and the change between the current wind direction angle and the first reference wind direction angle is greater than the first preset wind direction angle threshold;

[0016] If none of the aforementioned units meet the first condition, the second signal is output.

[0017] According to a first aspect of this application, after outputting the second signal, the wind farm tower sweep prevention method further includes:

[0018] Acquire the detection signals output by the two main shaft distance sensors of each unit;

[0019] Based on the detection signal, the position deviation value of the two main shafts of each unit is obtained;

[0020] If the position deviation value of the target unit is greater than the first preset deviation threshold, a single-unit protection strategy is executed for the target unit.

[0021] According to a first aspect of this application, after the single-unit protection strategy is implemented on the target unit, the wind farm tower sweep prevention method further includes:

[0022] If the position deviation value of the target unit is less than or equal to the first preset deviation threshold, the single-unit protection strategy is exited.

[0023] According to a first aspect of this application, after implementing the overall wind farm protection strategy, the wind farm tower sweep prevention method further includes:

[0024] Acquire second reference operating data; wherein, the second reference operating data includes second reference ambient temperature, second reference negative shear ratio, second reference wind speed, and second reference wind direction angle; the time node corresponding to the second reference operating data differs from the time node corresponding to the current operating data by a second preset time period;

[0025] Based on the current operating data, the second reference operating data, and the second preset data threshold, a third signal or a fourth signal is output; wherein, the second preset data threshold includes a second preset ambient temperature threshold, a second preset negative shear ratio threshold, a second preset wind speed threshold, and a second preset wind direction angle threshold; the third signal represents the end of the cold wave; the second signal represents the ongoing cold wave.

[0026] If the third signal is output, the overall protection strategy for the wind farm is exited.

[0027] According to a first aspect of this application, the step of outputting a third signal or a fourth signal based on the current operating data, the second reference operating data, and the second preset data threshold includes:

[0028] If all the units meet the second condition, the third signal is output; wherein, the second condition indicates that the change between the current ambient temperature and the second reference ambient temperature is greater than the second preset ambient temperature threshold, the change between the current negative shear ratio and the second reference negative shear ratio is greater than the second preset negative shear ratio threshold, the change between the current wind speed and the second reference wind speed is greater than the second preset wind speed threshold, and the change between the current wind direction angle and the second reference wind direction angle is greater than the second preset wind direction angle threshold;

[0029] If at least one of the units does not meet the second condition, the fourth signal is output.

[0030] According to a first aspect of this application, before acquiring the current operating data and first reference operating data of each turbine in the target wind farm, the wind farm tower sweep prevention method further includes:

[0031] Based on multiple selected cold wave start times, the first preset data threshold is selected from historical operational data, and the first preset time period is selected from multiple first reference time periods; wherein, the historical operational data includes multiple historical ambient temperatures, multiple historical negative shear ratios, multiple historical wind speeds, and multiple historical wind direction angles;

[0032] Based on multiple selected cold wave end times, the second preset data threshold is selected from historical operational data, and the second preset time period is selected from multiple second reference time periods.

[0033] Secondly, a wind farm tower sweep prevention device is also provided, comprising:

[0034] The first acquisition module is used to acquire the current operating data and the first reference operating data of each unit in the target wind farm; wherein, the current operating data includes the current ambient temperature, the current negative shear ratio, the current wind speed, and the current wind direction angle; the first reference operating data includes the first reference ambient temperature, the first reference negative shear ratio, the first reference wind speed, and the first reference wind direction angle; the time node corresponding to the first reference operating data differs from the current time node by a first preset time period.

[0035] The first output module is used to output a first signal or a second signal based on the current operating data, the first reference operating data, and the first preset data threshold; wherein, the first preset data threshold includes a first preset ambient temperature threshold, a first preset negative shear ratio threshold, a first preset wind speed threshold, and a first preset wind direction angle threshold; the first signal represents the signal of an approaching cold wave; and the second signal represents the signal of an approaching cold wave.

[0036] The first execution module is used to execute the overall protection strategy of the wind farm if the first signal is output.

[0037] Thirdly, a wind farm turbine system is also provided, including:

[0038] Multiple units;

[0039] As described in the previous embodiment, the wind farm anti-sweeping tower device is connected to multiple of the aforementioned turbine units via communication.

[0040] Fourthly, an electronic device is also provided, comprising: a processor; and a memory for storing executable instructions of the processor; wherein the processor is used to execute the wind farm anti-sweeping tower method described in the above embodiments.

[0041] Fifthly, a computer-readable storage medium is also provided, the storage medium storing a computer program for executing the wind farm anti-sweeping tower method described in the above embodiments.

[0042] The wind farm tower sweep prevention method, device, and wind farm unit system provided in this application embodiment can determine the amount of change of different parameter data in the current operating data relative to the different parameter data in the first reference operating data by comparing the current operating data with the corresponding data in the first reference operating data. Then, by determining the relationship between the amount of change of different parameters and the threshold of the corresponding parameter in the first preset data threshold, it can determine whether a cold wave has occurred at the current time. In other words, by using the four parameters related to the arrival of cold waves—ambient temperature, negative shear ratio, wind speed, and wind direction angle—it can accurately identify the time node of the cold wave and promptly take a wind farm overall protection strategy to collectively protect the units in the wind farm, avoid tower sweep problems in the wind farm units, and eliminate safety hazards. Attached Figure Description

[0043] The above and other objects, features, and advantages of this application will become more apparent from the more detailed description of the embodiments of this application in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof. In the drawings, the same first reference numerals generally represent the same components or steps.

[0044] Figure 1 This is a flowchart illustrating a wind farm tower sweep prevention method provided as an exemplary embodiment of this application.

[0045] Figure 2 This is a schematic diagram illustrating the process of executing a wind farm overall protection strategy if a first signal is output, as provided in an exemplary embodiment of this application.

[0046] Figure 3 A schematic flowchart of a wind farm tower sweep prevention method provided as another exemplary embodiment of this application.

[0047] Figure 4 This is a flowchart illustrating an exemplary embodiment of the present application, showing how a first signal or a second signal is output based on current operating data, a first reference operating data, and a first preset data threshold.

[0048] Figure 5 A schematic flowchart of a wind farm tower sweep prevention method provided as another exemplary embodiment of this application.

[0049] Figure 6 A schematic flowchart of a wind farm tower sweep prevention method provided as another exemplary embodiment of this application.

[0050] Figure 7 A schematic flowchart of a wind farm prevention method provided as another exemplary embodiment of this application.

[0051] Figure 8 This is a flowchart illustrating an exemplary embodiment of the present application, showing how a third signal or a fourth signal is output based on current operating data, second reference operating data, and a second preset data threshold.

[0052] Figure 9 This is a schematic flowchart of a wind farm tower sweep prevention method provided as another exemplary embodiment of this application.

[0053] Figure 10 A structural block diagram of a wind farm anti-sweeping tower device provided for an exemplary embodiment of this application.

[0054] Figure 11 A structural block diagram of a wind farm anti-sweeping tower device provided as another exemplary embodiment of this application.

[0055] Figure 12 A structural block diagram of a wind farm turbine system provided for an exemplary embodiment of this application.

[0056] Figure 13 A schematic diagram of the structure of an electronic device provided for an exemplary embodiment of this application. Detailed Implementation

[0057] Hereinafter, exemplary embodiments according to this application will be described in detail with reference to the first accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein.

[0058] Figure 1 This is a schematic flowchart illustrating a wind farm tower sweep prevention method provided as an exemplary embodiment of this application. Figure 1 As shown, the wind farm tower sweep prevention method provided in this application embodiment may include:

[0059] S210: Obtain the current operating data and first reference operating data of each unit in the target wind farm.

[0060] Specifically, the current operating data may include the current ambient temperature, the current negative shear ratio, the current wind speed, and the current wind direction angle.

[0061] It should be understood that ambient temperature changes drastically during a cold wave; therefore, the change in ambient temperature can be used as one of the indicators for determining whether a cold wave has arrived. For this reason, the current ambient temperature of the area where each unit is located can be acquired in real time during unit operation.

[0062] In one embodiment, the temperature detected by the temperature sensor at the current time point can be used as the current ambient temperature; or, the average of all temperatures detected within a period of time prior to the current time point (e.g., 15 min, 20 min, etc.) can be used as the aforementioned current ambient temperature.

[0063] It should be noted that the current negative shear ratio can be understood as the proportion of the time span in which negative shear (wind speed decreases with increasing altitude) occurs within a certain period of time before the current time point (e.g., 15 minutes, 20 minutes, etc.) to the total time span (e.g., the aforementioned 15 minutes, 20 minutes, etc.).

[0064] In one embodiment, it can be determined whether the unit has experienced negative shear over a period of time by acquiring data detected by the spindle distance sensor on the unit. The specific calculation method for determining whether negative shear has occurred is described in related technologies and will not be repeated here.

[0065] It should be understood that wind speed changes drastically during a cold wave, correspondingly increasing the proportion of units experiencing negative shear. Therefore, the change in the proportion of negative shear can be used as one of the indicators for determining whether a cold wave is approaching. Similarly, the change in wind speed can also be used as one of the indicators for determining whether a cold wave is approaching.

[0066] It should be understood that the direction of the wind encountered by the unit will also change when a cold wave arrives. Therefore, the wind direction angle (with the unit as a reference) can also be used as one of the indicators of whether a cold wave is coming.

[0067] It should be noted that the aforementioned first reference operating data may include the first reference ambient temperature, the first reference negative shear ratio, the first reference wind speed, and the first reference wind direction angle.

[0068] In practical applications, the current ambient temperature, current negative shear ratio, current wind speed, and current wind direction angle are compared with the first reference ambient temperature, first reference negative shear ratio, first reference wind speed, and first reference wind direction angle to determine their respective changes, thereby determining whether a cold wave is approaching. The determination process will be described later.

[0069] It should be noted that the difference between the first reference running data and the aforementioned current running data lies in the time point at which the data is acquired, but the acquisition methods are similar. Therefore, the acquisition method of the first reference running data can refer to the acquisition method of the aforementioned current running data, which will not be repeated here.

[0070] It should be noted that the time node corresponding to the first reference running data differs from the time node corresponding to the current running data by a first preset time period. In other words, the time node corresponding to the first reference running data is obtained by subtracting the first preset time period from the time node corresponding to the current running data.

[0071] In one embodiment, the first preset time period can be 6 hours, 12 hours, 18 hours, 24 hours, etc. In practical applications, a suitable first preset time period can be selected from multiple time periods according to requirements. The specific selection process will be described in detail later.

[0072] S220: Based on the current operating data, the first reference operating data, and the first preset data threshold, output a first signal or output a second signal.

[0073] Specifically, the first preset data threshold may include a first preset ambient temperature threshold, a first preset negative shear ratio threshold, a first preset wind speed threshold, and a first preset wind direction angle threshold.

[0074] It should be noted that the current ambient temperature, the first reference ambient temperature, and the first preset ambient temperature threshold are mutually corresponding; the current negative shear ratio, the first reference negative shear ratio, and the first preset negative shear ratio threshold are mutually corresponding; the current wind speed, the first reference wind speed, and the first preset wind speed threshold are mutually corresponding; and the current wind direction angle, the first reference wind direction angle, and the first preset wind direction angle threshold are mutually corresponding.

[0075] It should be noted that the first preset ambient temperature threshold, the first preset negative shear ratio threshold, the first preset wind speed threshold, and the first preset wind direction angle threshold can be obtained from historical operating data as needed. The specific filtering process will be described in detail later.

[0076] In practical applications, by comparing the current operating data with the corresponding data in the first reference operating data, the amount of change of different parameters in the current operating data relative to the different parameters in the first reference operating data can be determined. Then, by determining the relationship between the amount of change of different parameters and the threshold of the corresponding parameter in the first preset data threshold, it can be determined whether a cold wave has occurred at the current time point, thereby outputting a first signal (signal of a cold wave), or a second signal (signal of a cold wave not yet occurring). The process of determining the output of the first or second signal will be described in detail later.

[0077] S230: If the first signal is output, the overall protection strategy of the wind farm is executed.

[0078] If the first signal is output, it indicates that the wind turbines in the wind farm are operating under conditions of a cold wave, which can easily lead to tower sweeping problems. Specifically, after a cold wave hits, the blades of the wind turbines in the wind farm are prone to deformation and the entire turbine may tilt due to the influence of low temperature, wind speed, and wind direction. The position of the blade's plane of rotation changes, resulting in a decrease in the distance between the blade and the tower. During rotation, the blade is more likely to collide with the tower, which is the tower sweeping problem.

[0079] It should be understood that, upon outputting the first signal, in order to promptly prevent tower sweeping issues from occurring on the wind farm turbines during a cold wave, step S230 is executed to implement the overall wind farm protection strategy. It should be noted that the overall wind farm protection strategy can be understood as providing collective protection for all turbines in the wind farm, preventing tower sweeping issues from occurring on all turbines, and eliminating any safety hazards present to all turbines during a cold wave.

[0080] In one embodiment, the overall protection strategy for the wind farm may include controlling the blades of all units to properly reduce the blade pitch (e.g., by increasing the blade pitch angle) to increase the wind resistance on the blades and reduce the blade rotation speed.

[0081] In one embodiment, the overall protection strategy for the wind farm may also include controlling the plane of rotation of all turbine blades to move away from the tower, thereby preventing the blades from colliding with the tower.

[0082] The wind farm tower sweep prevention method provided in this application compares the current operating data with the corresponding data in the first reference operating data to determine the amount of change of different parameter data in the current operating data relative to the different parameter data in the first reference operating data. Then, by determining the relationship between the amount of change of different parameters and the threshold of the corresponding parameter in the first preset data threshold, it can determine whether a cold wave has occurred at the current time. In other words, by using the four parameters related to the arrival of a cold wave—ambient temperature, negative shear ratio, wind speed, and wind direction angle—it can accurately identify the time of the cold wave and promptly implement a wind farm overall protection strategy to collectively protect the units in the wind farm, avoid tower sweep problems, and eliminate safety hazards.

[0083] Figure 2 This is a flowchart illustrating the execution of a wind farm overall protection strategy if a first signal is output, as provided in an exemplary embodiment of this application. Figure 2 As shown, step S230 may include:

[0084] S231: If the first signal is output, acquire the detection signals output by the two main shaft distance sensors of each unit.

[0085] S232: Based on the detection signal, obtain the position deviation value of the two main shafts of each unit.

[0086] S233: If the position deviation of a unit exceeds a preset proportion and is greater than the first preset deviation threshold, the overall protection strategy for the wind farm shall be executed.

[0087] It should be noted that while the first signal indicates the arrival of a cold wave, in practice, a cold wave does not necessarily mean that all wind turbines in the wind farm will experience tower sweep issues. If the overall wind farm protection strategy is directly implemented during a cold wave, it can easily lead to significant power generation losses. Therefore, to minimize losses, it is necessary to determine whether each turbine triggers airspace protection during a cold wave (i.e., to determine whether each turbine faces tower sweep risk during a cold wave).

[0088] Based on the above reasons, steps S231, S232 and S233 can be performed to determine whether there is a risk of tower sweeping in the wind farm.

[0089] Specifically, each unit is equipped with a spindle distance sensor on each of its two main shafts. These sensors detect axial displacement, radial runout, and other variations of the corresponding spindle. In other words, the two spindle distance sensors can monitor the position of the two spindles in real time. Under normal circumstances, the positions of the two spindles relative to the tower are relatively stable, and the variation between the sensor readings (the positional deviation between the two spindles) should be within a reasonable range. Conversely, if the positional deviation exceeds a first preset deviation threshold, it can be considered that the unit's attitude is problematic, indicating issues such as blade skewness or displacement, thus indicating a potential risk of tower sweeping.

[0090] In practical applications, if only a small number of turbines have a position deviation value greater than the first preset deviation threshold, then considering the impact of the overall wind farm protection strategy on power generation, a separate protection strategy can be implemented for these few turbines (described later). If more than a preset proportion of turbines have a position deviation value greater than the first preset deviation threshold, then it can be considered that most turbines in the wind farm are at risk of tower sweeping. To avoid the overall impact of a cold wave on the wind farm, an overall wind farm protection strategy can be implemented to protect all turbines in the wind farm.

[0091] It should be understood that the aforementioned first preset deviation threshold and preset ratio can be set according to actual conditions, and the embodiments of this application do not specifically limit the first preset deviation threshold and preset ratio.

[0092] Figure 3 A schematic flowchart illustrating a wind farm tower sweep prevention method provided as another exemplary embodiment of this application. Figure 3 As shown, after performing step S233, the wind farm tower sweep prevention method may further include:

[0093] S240: If the position deviation of all units is less than or equal to the second preset deviation threshold, exit the overall protection strategy for the wind farm.

[0094] Specifically, if the positional deviation of all turbine units is less than or equal to the second preset deviation threshold, then it can be considered that the attitude of all turbine units is in a normal state, and there are no obvious problems such as significant skewness or displacement of the blade rotation plane. In other words, it can be determined that there is no risk of tower sweeping for any of the turbine units. Therefore, based on this, the overall wind farm protection strategy can be deactivated to reduce the overall power generation loss of the wind farm.

[0095] It should be understood that the second preset deviation threshold can be set according to the actual situation, and the embodiments of this application do not specifically limit the second preset deviation threshold.

[0096] In one embodiment, the first preset deviation threshold and the second preset deviation threshold may be equal or unequal.

[0097] Figure 4 This is a flowchart illustrating an exemplary embodiment of the present application, showing how a first signal or a second signal is output based on current operating data, a first reference operating data, and a first preset data threshold. Figure 4 As shown, step S220 may include:

[0098] S221: If at least one unit satisfies the first condition, output the first signal.

[0099] S222: If none of the units meet the first condition, output the second signal.

[0100] Specifically, the first condition can be understood as the change between the current ambient temperature and the first reference ambient temperature being greater than the first preset ambient temperature threshold, the change between the current negative shear ratio and the first reference negative shear ratio being greater than the first preset negative shear ratio threshold, the change between the current wind speed and the first reference wind speed being greater than the first preset wind speed threshold, and the change between the current wind direction angle and the first reference wind direction angle being greater than the first preset wind direction angle threshold.

[0101] It should be noted that, considering that the ambient temperature should decrease when a cold wave arrives, the aforementioned "change between the current ambient temperature and the first reference ambient temperature" can be considered as the decrease in the current ambient temperature compared to the first reference ambient temperature.

[0102] Similarly, when a cold wave hits, the negative shear ratio should increase. Therefore, the aforementioned "change between the current negative shear ratio and the first reference negative shear ratio" can be considered as the increase in the current negative shear ratio compared to the first reference negative shear ratio.

[0103] Similarly, when a cold wave hits, the wind speed should increase. Therefore, the aforementioned "change between the current wind speed and the first reference wind speed" can be considered as the increase in the current wind speed compared to the first reference wind speed.

[0104] Similarly, when a cold wave arrives, the wind direction angle will deviate significantly. Therefore, the aforementioned "change between the current wind direction angle and the first reference wind direction angle" can be considered as the deviation between the current wind direction angle and the first reference wind direction angle.

[0105] It should be noted that because the multiple turbines in a wind farm are located in different positions, their sensitivity to the arrival of a cold wave varies. In practical applications, to accurately determine the arrival time of a cold wave, step S221 is executed. If at least one turbine meets the aforementioned first condition, it can be assumed that a cold wave has arrived at the current time, and the aforementioned first signal is output. Conversely, if none of the turbines meet the first condition, step S222 is executed. If none of the turbines meet the first condition, it can be assumed that a cold wave has not yet arrived, and the aforementioned second signal is output.

[0106] It should be understood that by performing steps S221 and S222, and combining the changes in four indicators closely related to the arrival of a cold wave—ambient temperature, negative shear ratio, wind speed, and wind direction angle—to determine whether a cold wave is approaching, the accuracy of identifying the timing of a cold wave can be further improved, facilitating timely implementation of targeted measures to eliminate potential safety hazards.

[0107] Figure 5 A schematic flowchart of a wind farm tower sweep prevention method provided for another exemplary embodiment of this application. After step S220, the wind farm tower sweep prevention method further includes:

[0108] S250: Acquire the detection signals output by the two spindle distance sensors of each unit.

[0109] S260: Based on the detection signal, obtain the position deviation value of the two main shafts of each unit.

[0110] It should be noted that the execution process of steps S250 and S260 is similar to that of steps S231 and S232 mentioned above, and can be referred to the previous description.

[0111] S270: If the position deviation of the target unit is greater than the first preset deviation threshold, a single-unit protection strategy is implemented for the target unit.

[0112] Specifically, when step S220 is executed and a second signal is output, that is, when a cold wave is not expected, if the position deviation of the target unit is greater than the first preset deviation threshold, it means that the target unit still has the risk of tower sweeping when the cold wave is not expected. In this case, a single-unit protection strategy can be executed for the target unit to avoid tower sweeping problems.

[0113] In one embodiment, a single-unit protection strategy may include controlling the blades of the target unit to appropriately reduce the blade pitch (e.g., by increasing the blade pitch angle) to increase the wind resistance on the blades and reduce the blade rotation speed.

[0114] In one embodiment, the single-unit protection strategy may further include controlling the rotation plane of the target unit's blades to move away from the tower, thereby preventing the blades from colliding with the tower.

[0115] Figure 6 A schematic flowchart illustrating a wind farm tower sweep prevention method provided as another exemplary embodiment of this application. Figure 6 As shown, after step S270, the wind farm tower sweep prevention method may further include:

[0116] S280: If the position deviation of the target unit is less than or equal to the first preset deviation threshold, exit the single-unit protection strategy.

[0117] It should be understood that after executing step S270, the overall attitude of the target unit will be improved, and the position of the rotation plane of the corresponding blade will also change. When the position deviation value of the target unit is less than or equal to the first preset deviation threshold, it can be considered that the target unit has eliminated the risk of tower sweeping. At this time, the corresponding individual protection strategy can be exited to restore the target unit to normal working state and ensure the power generation of the target unit.

[0118] Figure 7 A schematic flowchart of a wind farm prevention method provided as another exemplary embodiment of this application. Figure 7 As shown, after step S230, the wind farm tower sweep prevention method may further include:

[0119] S290: Obtain the second reference running data.

[0120] S310: Based on the current operating data, the second reference operating data, and the second preset data threshold, output a third signal or output a fourth signal.

[0121] S320: If a third signal is output, exit the overall protection strategy for the wind farm.

[0122] It should be noted that after step S230, the system executes the overall protection strategy for the wind farm to prevent the turbines from being affected by the cold wave and causing tower sweeping problems. However, executing the overall protection strategy for the wind farm will significantly reduce the overall power generation of the wind farm. Therefore, in order to ensure that the turbines in the wind farm can resume normal operation in a timely manner, it is necessary to monitor in real time whether the cold wave has ended.

[0123] Specifically, the aforementioned second reference operating data may include the second reference ambient temperature, the second reference negative shear ratio, the second reference wind speed, and the second reference wind direction angle.

[0124] It should be noted that the difference between the second reference running data and the aforementioned current running data lies in the time point at which the data is acquired, but the acquisition method is similar. Therefore, the acquisition method of the second reference running data can be the same as that of the aforementioned current running data, which will not be repeated here.

[0125] It should be noted that the time node corresponding to the second reference running data differs from the time node corresponding to the current running data by a second preset time period. In other words, the time node corresponding to the second reference running data is obtained by subtracting the second preset time period from the time node corresponding to the current running data.

[0126] In one embodiment, the second preset time period can be 6 hours, 12 hours, 18 hours, 24 hours, etc. In practical applications, a suitable second preset time period can be selected from multiple time periods according to requirements. The specific selection process will be described in detail later.

[0127] Specifically, the aforementioned second preset data threshold may include a second preset ambient temperature threshold, a second preset negative shear ratio threshold, a second preset wind speed threshold, and a second preset wind direction angle threshold.

[0128] It should be noted that the current ambient temperature, the second reference ambient temperature, and the second preset ambient temperature threshold correspond to each other; the current negative shear ratio, the second reference negative shear ratio, and the second preset negative shear ratio threshold correspond to each other; the current wind speed, the second reference wind speed, and the second preset wind speed threshold correspond to each other; and the current wind direction angle, the second reference wind direction angle, and the second preset wind direction angle threshold correspond to each other.

[0129] It should be noted that the second preset ambient temperature threshold, the second preset negative shear ratio threshold, the second preset wind speed threshold, and the second preset wind direction angle threshold can be obtained from historical operating data according to requirements. The specific filtering process will be described in detail later.

[0130] In practical applications, by comparing the current operating data with the corresponding data in the second reference operating data, the amount of change of different parameters in the current operating data relative to the different parameters in the second reference operating data can be determined. Then, by determining the relationship between the amount of change of different parameters and the threshold of the corresponding parameter in the second preset data threshold, it can be determined whether the current time point is the end time of the cold wave, thereby outputting a third signal (signal of the end of the cold wave) or a fourth signal (signal of the cold wave not yet ending). The determination process for outputting the third or fourth signal will be described in detail later.

[0131] It should be understood that when the third signal is output, executing step S320 to exit the overall protection strategy of the wind farm can ensure that the units in the wind farm can resume normal operation in a timely manner when the cold wave ends, thereby reducing the loss of power generation.

[0132] Figure 8 This is a flowchart illustrating an exemplary embodiment of the present application, showing how a third signal or a fourth signal is output based on current operating data, second reference operating data, and a second preset data threshold. Figure 8 As shown, step S310 may include:

[0133] S311: If all units meet the second condition, output the third signal.

[0134] S312: If at least one unit does not meet the second condition, output the fourth signal.

[0135] Specifically, the second condition indicates that the change between the current ambient temperature and the second reference ambient temperature is greater than the second preset ambient temperature threshold, the change between the current negative shear ratio and the second reference negative shear ratio is greater than the second preset negative shear ratio threshold, the change between the current wind speed and the second reference wind speed is greater than the second preset wind speed threshold, and the change between the current wind direction angle and the second reference wind direction angle is greater than the second preset wind direction angle threshold.

[0136] It should be noted that, considering that the ambient temperature should rise when the cold wave ends, the aforementioned "change between the current ambient temperature and the second reference ambient temperature" can be considered as the increase in the current ambient temperature compared to the second reference ambient temperature.

[0137] Similarly, when the cold wave ends, the negative shear ratio should decrease. Therefore, the aforementioned "change between the current negative shear ratio and the second reference negative shear ratio" can be considered as the decrease in the current negative shear ratio compared to the second reference negative shear ratio.

[0138] Similarly, when the cold wave ends, the wind speed should decrease. Therefore, the aforementioned "change between the current wind speed and the second reference wind speed" can be considered as the decrease in the current wind speed compared to the second reference wind speed.

[0139] Similarly, when the cold wave ends, the wind direction angle will deviate. Therefore, the aforementioned "change between the current wind direction angle and the second reference wind direction angle" can be considered as the deviation between the current wind direction angle and the second reference wind direction angle.

[0140] In practical applications, when executing step S311, if the change between the current ambient temperature of all units and the second reference ambient temperature is greater than the second preset ambient temperature threshold, it can be considered that the ambient temperature at the current time point has undergone a significant change (a large increase) compared to the ambient temperature at the reference time point during the cold wave phase; if the change between the current negative shear ratio of all units and the second reference negative shear ratio is greater than the second preset negative shear ratio threshold, it can be considered that the negative shear ratio at the current time point has undergone a significant change (a large decrease) compared to the negative shear ratio at the reference time point during the cold wave phase; if the change between the current wind speed of all units and the second reference wind speed is greater than the second preset wind speed threshold, it can be considered that the wind speed at the current time point has undergone a significant change (a large decrease) compared to the wind speed at the reference time point during the cold wave phase; if the change between the current wind direction angle of all units and the second reference wind direction angle is greater than the second preset wind direction angle threshold, it can be considered that the wind direction angle at the current time point has undergone a significant change compared to the wind direction angle at the reference time point during the cold wave phase. In other words, all four indicators related to the arrival of the cold wave have changed significantly. Therefore, it can be assumed that the cold wave has ended at the current time point, and the third signal can be output accordingly.

[0141] Conversely, if at least one unit does not meet the second condition in step S312, it can be assumed that at least one unit is still in the environment of the cold wave and the cold wave has not ended. Therefore, the fourth signal can be output accordingly.

[0142] It should be understood that by performing steps S311 and S312, and combining the changes in four indicators closely related to cold waves—ambient temperature, negative shear ratio, wind speed, and wind direction angle—to determine whether a cold wave has ended, the accuracy of identifying the end time of a cold wave can be improved, making it easier for the units in the wind farm to resume normal operation in a timely manner when the cold wave ends.

[0143] Figure 9 This is a flowchart illustrating a wind farm tower sweep prevention method provided as another exemplary embodiment of this application. Figure 9 As shown, before step S210, the wind farm tower sweep prevention method further includes:

[0144] S330: Based on multiple selected cold wave start times, a first preset data threshold is selected from historical operating data, and a first preset time period is selected from multiple first reference time periods.

[0145] S340: Based on multiple selected cold wave end times, a second preset data threshold is selected from historical operational data, and a second preset time period is selected from multiple second reference time periods.

[0146] It should be noted that historical operational data may include multiple historical ambient temperatures, multiple historical negative shear ratios, multiple historical wind speeds, and multiple historical wind direction angles. Specifically, taking step S330 as an example, a suitable first preset ambient temperature threshold can be selected from multiple historical ambient temperatures, a first preset negative shear ratio threshold can be selected from multiple historical negative shear ratios, a first preset wind speed threshold can be selected from multiple historical wind speeds, and a first preset wind direction angle threshold can be selected from multiple historical wind direction angles.

[0147] Specifically, multiple cold wave start times and corresponding cold wave end times can be selected from the historical cases of the unit. Each set of cold wave start times and cold wave end times corresponds to a cold wave phase.

[0148] When selecting the start time of a cold wave, it is necessary to refer to the earliest tower sweep time corresponding to the start time of a cold wave in historical cases. For example, the filter condition should be set to the time node corresponding to the start time of the cold wave being two hours before the earliest tower sweep time. Similarly, when selecting the end time of a cold wave, it is necessary to refer to the latest tower sweep time corresponding to the end time of a cold wave in historical cases. For example, the filter condition should be set to the time node corresponding to the end time of the cold wave being two hours after the latest tower sweep time. In this way, it can be ensured that the cold wave protection strategy is activated between the selected start time and the corresponding end time of the cold wave (due to the aforementioned filter condition, it is ensured that tower sweep occurs in all selected cold wave phases, therefore, the cold wave protection strategy is activated in all of them).

[0149] It should be noted that the execution process of step S330 is similar to that of step S340. Executing steps S330 and S340 may include:

[0150] Calculate the changes in historical ambient temperature (A1), historical negative shear ratio (B1), historical wind speed (C1), and historical wind direction angle (D1) at the start of the cold wave compared to the previous K1 hour (i.e., the aforementioned first reference time period); calculate the changes in historical ambient temperature (A2), historical negative shear ratio (B2), historical wind speed (C2), and historical wind direction angle (D2) at the end of the cold wave compared to the previous K2 hour (i.e., the aforementioned second reference time period).

[0151] By changing the values ​​of K1 (in practical applications, K1 can be replaced with 6 hours, 12 hours, 18 hours, 24 hours, etc.) and K2 (in practical applications, K2 can be replaced with 6 hours, 12 hours, 18 hours, 24 hours, etc.), we iterate through all selected cold wave start and end times to obtain multiple sets of cold wave stages corresponding to the cold wave start time, the corresponding cold wave end time, the corresponding K1 value, the corresponding K2 value, the corresponding change A1, the corresponding change B1, the corresponding change C1, the corresponding change D1, the corresponding change B2, the corresponding change C2, and the corresponding change D2.

[0152] Then, by setting evaluation indicators, the optimal K1 value, optimal K2 value, optimal change A1, optimal change B1, optimal change C1, optimal change D1, optimal change B2, optimal change C2, and optimal change D2 can be selected. The optimal K1 value is the aforementioned first preset time period. The optimal K2 value is the aforementioned second preset time period. The optimal change A1, optimal change B1, optimal change C1, and optimal change D1 constitute the aforementioned first preset data threshold. The optimal change A2, optimal change B2, optimal change C2, and optimal change D2 constitute the aforementioned second preset data threshold.

[0153] It should be noted that the aforementioned evaluation indicators may include power generation loss, false alarm rate, etc.

[0154] In one embodiment, if power generation loss is used as a single evaluation index, the values ​​of K1, K2, changes A1, B1, C1, D1, A2, B2, C2, and D2 corresponding to the minimum power generation loss (power generation loss during the cold wave phase calculated from the power curve) can be selected, thus obtaining the first preset time period, the second preset time period, the first preset data threshold, and the second preset data threshold.

[0155] In one embodiment, if the false alarm rate loss is used as a single evaluation index, the K1 value, K2 value, change A1, change B1, change C1, change D1, change A2, change B2, change C2, and change D2 corresponding to the minimum false alarm rate can be selected, thus obtaining the first preset time period, the second preset time period, the first preset data threshold, and the second preset data threshold.

[0156] In one embodiment, if power generation loss and false alarm rate are used as comprehensive evaluation indicators, and power generation and false alarm rate are weighted, the K1 value, K2 value, change A1, change B1, change C1, change D1, change A2, change B2, change C2, and change D2 corresponding to the minimum weighted value can be screened out, thus obtaining the first preset time period, the second preset time period, the first preset data threshold, and the second preset data threshold.

[0157] Figure 10 This is a structural block diagram of a wind farm anti-sweeping tower device provided as an exemplary embodiment of this application. Figure 10 As shown in the embodiment of this application, the wind farm anti-sweeping device 500 may include: a first acquisition module 510, used to acquire the current operating data and first reference operating data of each unit in the target wind farm; wherein, the current operating data includes the current ambient temperature, current wind direction angle, current wind speed, and current wind direction angle; the first reference operating data includes the first reference ambient temperature, first reference wind direction angle, first reference wind speed, and first reference wind direction angle; the time node corresponding to the first reference operating data differs from the current time node by a first preset time period; a first output module 520, used to output a first signal or output a second signal according to the current operating data, the first reference operating data, and a first preset data threshold; wherein, the first preset data threshold includes a first preset ambient temperature threshold, a first preset wind direction angle threshold, a first preset wind speed threshold, and a first preset wind direction angle threshold; the first signal represents a signal of an approaching cold wave; the second signal represents a signal of an approaching cold wave; and a first execution module 530, used to execute the overall protection strategy of the wind farm if the first signal is output.

[0158] The wind farm anti-scraping device provided in this application embodiment can determine the amount of change of different parameter data in the current operating data relative to the different parameter data in the first reference operating data by comparing the current operating data with the corresponding data in the first reference operating data. Then, by determining the relationship between the amount of change of different parameters and the threshold of the corresponding parameter in the first preset data threshold, it can determine whether a cold wave has occurred at the current time. In other words, by using the four parameters related to the arrival of a cold wave—ambient temperature, negative shear ratio, wind speed, and wind direction angle—it can accurately identify the time node of the cold wave and promptly take a comprehensive protection strategy for the wind farm to collectively protect the units in the wind farm, avoid the units in the wind farm from scratching problems, and eliminate safety hazards.

[0159] Figure 11 A structural block diagram of a wind farm anti-sweeping tower device provided as another exemplary embodiment of this application. (See diagram below.) Figure 11As shown, in one embodiment, the first execution module 530 may include: a second acquisition module 531, configured to acquire the detection signals output by the distance sensors of the two main shafts of each unit if a first signal is output; a first calculation module 532, configured to obtain the position deviation value of the two main shafts of each unit based on the detection signals; and a second execution module 533, configured to execute the overall protection strategy of the wind farm if the position deviation value of a unit exceeds a preset proportion and is greater than a first preset deviation threshold.

[0160] like Figure 11 As shown, in one embodiment, the wind farm anti-sweeping device 500 may further include: a first exit module 540, used to exit the overall wind farm protection strategy if the position deviation values ​​of all units are less than or equal to a second preset deviation threshold.

[0161] like Figure 11 As shown, in one embodiment, the first output module 520 may include: a second output module 521, configured to output a first signal if at least one unit satisfies the first condition; wherein the first condition represents that the change between the current ambient temperature and the first reference ambient temperature is greater than a first preset ambient temperature threshold, the change between the current negative shear ratio and the first reference negative shear ratio is greater than a first preset negative shear ratio threshold, the change between the current wind speed and the first reference wind speed is greater than a first preset wind speed threshold, and the change between the current wind direction angle and the first reference wind direction angle is greater than a first preset wind direction angle threshold; the third output module 522 is configured to output a second signal if none of the units satisfy the first condition.

[0162] like Figure 11 As shown, in one embodiment, the wind farm anti-sweeping device 500 may further include: a third acquisition module 550, used to acquire the detection signals output by the two main shaft distance sensors of each unit; a second calculation module 560, used to obtain the position deviation values ​​of the two main shafts of each unit according to the detection signals; and a third execution module 570, used to execute a single-unit protection strategy for the target unit if the position deviation value of the target unit is greater than a first preset deviation threshold.

[0163] like Figure 11 As shown, in one embodiment, the wind farm anti-sweeping tower device 500 may further include: a second exit module 580, used to exit the single-unit protection strategy if the position deviation value of the target unit is less than or equal to a first preset deviation threshold.

[0164] like Figure 11As shown, in one embodiment, the wind farm anti-sweeping device 500 may further include: a fourth acquisition module 590, used to acquire second reference operating data; wherein the second reference operating data includes a second reference ambient temperature, a second reference negative shear ratio, a second reference wind speed, and a second reference wind direction angle; the time node corresponding to the second reference operating data differs from the time node corresponding to the current operating data by a second preset time period; a fourth output module 610, used to output a third signal or a fourth signal based on the current operating data, the second reference operating data, and a second preset data threshold; wherein the second preset data threshold includes a second preset ambient temperature threshold, a second preset negative shear ratio threshold, a second preset wind speed threshold, and a second preset wind direction angle threshold; the third signal represents the end of the cold wave; the second signal represents the not-yet-end of the cold wave; and a third exit module 620, used to exit the overall wind farm protection strategy if the third signal is output.

[0165] like Figure 11 As shown, in one embodiment, the fourth output module 610 may include: a fifth output module 611, configured to output a third signal if all units meet the second condition; wherein the second condition represents that the change between the current ambient temperature and the second reference ambient temperature is greater than a second preset ambient temperature threshold, the change between the current negative shear ratio and the second reference negative shear ratio is greater than a second preset negative shear ratio threshold, the change between the current wind speed and the second reference wind speed is greater than a second preset wind speed threshold, and the change between the current wind direction angle and the second reference wind direction angle is greater than a second preset wind direction angle threshold; and a sixth output module 612, configured to output a fourth signal if at least one unit does not meet the second condition.

[0166] like Figure 11 As shown, in one embodiment, the wind farm anti-sweeping device 500 may further include: a first screening module 630, used to screen a first preset data threshold from historical operating data based on multiple selected cold wave start times, and to screen a first preset time period from multiple first reference time periods; wherein, the historical operating data includes multiple historical ambient temperatures, multiple historical negative shear ratios, multiple historical wind speeds, and multiple historical wind direction angles; and a second screening module 640, used to screen a second preset data threshold from historical operating data based on multiple selected cold wave end times, and to screen a second preset time period from multiple second reference time periods.

[0167] Figure 12 This is a structural block diagram of a wind farm turbine system provided as an exemplary embodiment of this application. Figure 12As shown, the wind farm turbine system 700 provided in this application embodiment may include multiple turbine units 710 and a wind farm anti-sweeping tower device 500 as described in the previous embodiment. The wind farm anti-sweeping tower device 500 is communicatively connected to multiple turbine units 710.

[0168] The wind farm turbine system 700 provided in this application embodiment has all the functions of the wind farm anti-scraping tower device 500, and its beneficial effects can be referred to the beneficial effects of the aforementioned wind farm anti-scraping tower device 500.

[0169] Figure 13 This is a schematic diagram of the structure of an electronic device provided in an exemplary embodiment of this application. The electronic device 900 can be any one or both of a first device and a second device, or a standalone device independent of them. The standalone device can communicate with the first device and the second device to receive the collected input signals from them.

[0170] like Figure 13 As shown, the electronic device 900 includes one or more processors 910 and a memory 920. The memory 920 is used to store executable instructions of the processor 910, which is used to execute the wind farm anti-sweeping tower method described in the above embodiments.

[0171] The processor 910 may be a central processing unit (CPU) or other form of processing unit with data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device 900 to perform desired functions.

[0172] The memory 920 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory. The non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 910 may execute the program instructions to implement the control methods and / or other desired functions of the various embodiments of this application described above. Various contents such as input signals, signal components, and noise components may also be stored in the computer-readable storage medium.

[0173] In one example, the electronic device 900 may also include an input device 930 and an output device 940, which are interconnected via a bus system and / or other forms of connection mechanism (not shown).

[0174] When the electronic device is a standalone device, the input device 930 can be a communication network connector for receiving the acquired input signals from the first device and the second device.

[0175] In addition, the input device 930 may also include, for example, a keyboard, a mouse, etc.

[0176] The output device 940 can output various information to the outside, including determined distance information, direction information, etc. The output device 940 may include, for example, a display, a speaker, a printer, and a communication network and its connected remote output devices, etc.

[0177] Of course, for the sake of simplicity, Figure 13 Only some of the components of the electronic device 900 relevant to this application are shown in this illustration; components such as buses, input / output interfaces, etc., are omitted. In addition, the electronic device 900 may include any other suitable components depending on the specific application.

[0178] The computer program product can be written in any combination of one or more programming languages ​​to perform the operations of the embodiments of this application. The programming languages ​​include object-oriented programming languages ​​such as Java and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computing device, partially on the user's computing device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0179] The computer-readable storage medium may be any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may, for example, include, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatuses, or devices, or any combination thereof. More specific examples of readable storage media (a non-exhaustive list) include: electrical connections having one or more wires, portable disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0180] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0181] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0182] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0183] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0184] The above description has been given for illustrative and descriptive purposes. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A method for preventing tower sweeping in wind farms, characterized in that, include: Acquire the current operating data and first reference operating data for each turbine in the target wind farm; wherein, the current operating data includes the current ambient temperature, current negative shear ratio, current wind speed, and current wind direction angle; the first reference operating data includes the first reference ambient temperature, first reference negative shear ratio, first reference wind speed, and first reference wind direction angle; the time node corresponding to the first reference operating data differs from the time node corresponding to the current operating data by a first preset time period; Based on the current operating data, the first reference operating data, and the first preset data threshold, a first signal or a second signal is output; wherein, the first preset data threshold includes a first preset ambient temperature threshold, a first preset negative shear ratio threshold, a first preset wind speed threshold, and a first preset wind direction angle threshold; the first signal represents the signal of an approaching cold wave; the second signal represents the signal of an approaching cold wave. If the first signal is output, the overall protection strategy for the wind farm will be executed; Wherein, the step of executing the overall wind farm protection strategy if the first signal is output includes: If the first signal is output, the detection signals output by the two main shaft distance sensors of each unit are obtained; Based on the detection signal, the position deviation value of the two main shafts of each unit is obtained; If the position deviation value of the units exceeds a first preset deviation threshold by more than a preset proportion, the overall protection strategy of the wind farm is executed.

2. The wind farm tower sweep prevention method according to claim 1, characterized in that, After implementing the overall wind farm protection strategy, the wind farm tower sweep prevention method further includes: If the position deviation value of all the units is less than or equal to the second preset deviation threshold, the overall protection strategy of the wind farm is exited.

3. The wind farm tower sweep prevention method according to claim 1, characterized in that, The step of outputting a first signal or a second signal based on the current operating data, the first reference operating data, and the first preset data threshold includes: If at least one of the units satisfies the first condition, the first signal is output; wherein, the first condition indicates that the change between the current ambient temperature and the first reference ambient temperature is greater than the first preset ambient temperature threshold, the change between the current negative shear ratio and the first reference negative shear ratio is greater than the first preset negative shear ratio threshold, the change between the current wind speed and the first reference wind speed is greater than the first preset wind speed threshold, and the change between the current wind direction angle and the first reference wind direction angle is greater than the first preset wind direction angle threshold; If none of the aforementioned units meet the first condition, the second signal is output.

4. The wind farm tower sweep prevention method according to claim 1, characterized in that, After outputting the second signal, the wind farm tower sweep prevention method further includes: Acquire the detection signals output by the two main shaft distance sensors of each unit; Based on the detection signal, the position deviation value of the two main shafts of each unit is obtained; If the position deviation value of the target unit is greater than the first preset deviation threshold, a single-unit protection strategy is executed for the target unit.

5. The wind farm tower sweep prevention method according to claim 4, characterized in that, After implementing the single-unit protection strategy for the target unit, the wind farm tower sweep prevention method further includes: If the position deviation value of the target unit is less than or equal to the first preset deviation threshold, the single-unit protection strategy is exited.

6. The wind farm tower sweep prevention method according to claim 1, characterized in that, After implementing the overall wind farm protection strategy, the wind farm tower sweep prevention method further includes: Acquire second reference operating data; wherein, the second reference operating data includes second reference ambient temperature, second reference negative shear ratio, second reference wind speed, and second reference wind direction angle; the time node corresponding to the second reference operating data differs from the time node corresponding to the current operating data by a second preset time period; Based on the current operating data, the second reference operating data, and the second preset data threshold, a third signal or a fourth signal is output; wherein, the second preset data threshold includes a second preset ambient temperature threshold, a second preset negative shear ratio threshold, a second preset wind speed threshold, and a second preset wind direction angle threshold; the third signal represents the end of the cold wave; the fourth signal represents the continued existence of the cold wave. If the third signal is output, the overall protection strategy for the wind farm is exited.

7. The wind farm tower sweep prevention method according to claim 6, characterized in that, The step of outputting a third signal or a fourth signal based on the current operating data, the second reference operating data, and the second preset data threshold includes: If all the units meet the second condition, the third signal is output; wherein, the second condition indicates that the change between the current ambient temperature and the second reference ambient temperature is greater than the second preset ambient temperature threshold, the change between the current negative shear ratio and the second reference negative shear ratio is greater than the second preset negative shear ratio threshold, the change between the current wind speed and the second reference wind speed is greater than the second preset wind speed threshold, and the change between the current wind direction angle and the second reference wind direction angle is greater than the second preset wind direction angle threshold; If at least one of the units does not meet the second condition, the fourth signal is output.

8. The wind farm tower sweep prevention method according to claim 6, characterized in that, Before acquiring the current operating data and first reference operating data of each unit in the target wind farm, the wind farm tower sweep prevention method further includes: Based on multiple selected cold wave start times, the first preset data threshold is selected from historical operational data, and the first preset time period is selected from multiple first reference time periods; wherein, the historical operational data includes multiple historical ambient temperatures, multiple historical negative shear ratios, multiple historical wind speeds, and multiple historical wind direction angles; Based on multiple selected cold wave end times, the second preset data threshold is selected from historical operational data, and the second preset time period is selected from multiple second reference time periods.

9. A wind farm tower sweep prevention device, characterized in that, include: The first acquisition module is used to acquire the current operating data and the first reference operating data of each unit in the target wind farm; wherein, the current operating data includes the current ambient temperature, the current negative shear ratio, the current wind speed, and the current wind direction angle; the first reference operating data includes the first reference ambient temperature, the first reference negative shear ratio, the first reference wind speed, and the first reference wind direction angle; the time node corresponding to the first reference operating data differs from the current time node by a first preset time period. The first output module is used to output a first signal or a second signal based on the current operating data, the first reference operating data, and the first preset data threshold; wherein, the first preset data threshold includes a first preset ambient temperature threshold, a first preset negative shear ratio threshold, a first preset wind speed threshold, and a first preset wind direction angle threshold; the first signal represents the signal of an approaching cold wave; and the second signal represents the signal of an approaching cold wave. The first execution module is used to execute the overall protection strategy of the wind farm if the first signal is output. The first execution module includes: The second acquisition module is used to acquire the detection signals output by the two main shaft distance sensors of each unit if the first signal is output. The first calculation module is used to obtain the position deviation value of the two main shafts of each unit based on the detection signal; The second execution module is used to execute the overall protection strategy of the wind farm if the position deviation value of the units exceeds a preset proportion and is greater than a first preset deviation threshold.

10. A wind farm turbine system, characterized in that, include: Multiple units; The wind farm anti-sweeping tower device as described in claim 9 is communicatively connected to multiple of the aforementioned turbine units.

Images