Method and device for detecting abnormality of pitch control loop of wind turbine

Abstract

Provided are a method and device for detecting an abnormality in a pitch control loop of a wind turbine, the detection method comprising: acquiring sampling values ​​of the pitch angle of the wind turbine at multiple sampling moments within a predetermined time period; The predicted value of the pitch angle at the plurality of sampling moments; analyze the deviation of the sampling value of the pitch angle relative to the predicted value of the pitch angle; if it is determined that the sampling value of the pitch angle is relative to the predicted value of the pitch angle If there is a deviation, it is judged whether the change of the sampling value of the pitch angle satisfies the abnormal characteristic; and the detection result for the pitch control loop is output according to the judgment result of the abnormal characteristic. Using the method and device for detecting abnormality of the pitch control loop of the wind turbine according to the exemplary embodiment of the present invention, the abnormal state of the pitch control loop of the wind turbine can be effectively identified, and the abnormal state can be dealt with in time, which is helpful for Ensure the stability of the wind turbine.

Description

technical field [0001] The present invention generally relates to the technical field of wind power generation, and more particularly, to a method and device for detecting abnormality of a pitch control loop of a wind turbine. Background technique [0002] The pitch system of the wind turbine can stabilize the speed and power output by adjusting the pitch angle, or perform aerodynamic braking to stop. The principle of the pitch control loop is: the anemometer installed on the nacelle measures the wind speed, and transmits the wind speed information to the control cabinet at the bottom of the tower, analyzes the wind speed information to determine the pitch information, and transmits the pitch information to the hub pitch system. The center box transmits the pitch information to the 3 axle boxes, and the 3 axle boxes adjust the pitch angle of the blades through the pitch drive. [0003] The normal operation of the pitch control loop of the wind turbine is related to the safe...

AI Technical Summary

Problems solved by technology

The difficulty of detecting this abnormal mode is that it generally does not cause obvious abnormal stability of the whole machine and reports a fault to realize protection.

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