Method and device for detecting extreme gust based on yaw errors

Abstract

The invention provides a method and device for detecting extreme gust based on yaw errors. The method for detecting the extreme gust based on the yaw error comprises the steps: determining yaw error, and determining the change trend of the yaw error based on the yaw error; and determining whether an extreme gust is detected based on the variation trend of the yaw error. According to the method and the device provided by the invention, the extreme gust can be detected earlier, and meanwhile, false alarm detection is avoided, so that the extreme load of the wind generating set can be reduced.

Description

technical field [0001] The invention relates to the field of wind power, more specifically, to a method and device for detecting extreme gusts based on yaw errors. Background technique [0002] External environmental conditions have a greater impact on the safety and reliability of wind turbines. For example, under the limit load condition where the wind turbine encounters extreme gusts (for example, Extreme Coherent Gusts (ECG)), the wind turbines encounter large limit loads due to severe changes in wind speed and direction, and even wind power generation The unit shuts down. Therefore, it is extremely important to detect extreme wind gusts accurately and quickly. [0003] At present, the general method for detecting extreme wind gusts is to use a time-averaged filter to calculate the average value of the yaw error at a given time interval (for example, 1 second, 5 seconds, or 10 seconds), and the output value of the time-averaged filter is related to the gust The extrem...

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Problems solved by technology

Also, if you use a threshold directly on the yaw error to compare or filter it, there may be a long detection period or a large number of false positive detections due to wind fluctuations in normal operation

In addition, in order to ensure no false positive detection of extreme gust events during normal operation, existing methods usually take 6 to 8 seconds to detect extreme gust events, however, the wind direction changes rapidly within 10 seconds (usually the wind direction is between can change from 60 to 90 degrees within 10 seconds), the detection time of 6 to 8 seconds required by existing methods is too late for extreme gust detection, so it is impossible to detect extreme gusts early without false alarms detection

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