Method and apparatus for identifying wind turbine blade icing state

摘要

The present application discloses a method and apparatus for identifying a wind generator blade freezing state. The method includes setting a preset wind speed threshold and a preset rotational speed threshold, and setting the preset rotational speed threshold to a lower limit of the maximum limiting rotational speed at which the wind generator is operated under the limiting output condition; Obtaining a current wind speed and a current rotation speed of the wind generator, and comparing the current wind speed with a preset wind speed threshold and a preset rotation speed threshold, respectively; If the current wind speed is greater than the preset wind speed threshold and the current rotation speed of the wind generator is less than the preset rotation speed threshold, gradually increasing the blade freezing index, and gradually decreasing the blade freezing index; And if the blade freeze potential index is greater than the preset index, determining that the blade is in the freezing state, wherein the preset rotational speed threshold is greater than the minimum rotational speed of the wind generator.