Wind turbine blade icing recognition method and device

Abstract

The invention provides a blade icing identification method and device of a wind driven generator. The identification method comprises the following steps that the current actual power generation powervalue of the wind power generator is determined; the actual power generation power value is compared with a first preset value; if the actual power generation power value is not smaller than the first preset value, a current pitch angle is determined; and the icing state of the blade is determined according to the current pitch angle. According to the exemplary embodiment of the blade icing identification method and device of the wind driven generator, the icing state of the blade can be recognized based on the actual power generation power value and the pitch angle of the wind power generator, and the accuracy and the reliability of the icing judgment of the blades are effectively improved.

Description

technical field [0001] The present invention generally relates to the technical field of wind power generation, and more specifically, relates to a method and device for identifying icing of blades of a wind power generator. Background technique [0002] Wind turbines generally work in areas with abundant wind resources, and the environment they face is relatively harsh. In low-temperature or severe cold regions and seasons, the blades often freeze. Once the blades are covered with ice, the power output decreases, and the blade quality and There will be imbalance in aerodynamics, which will increase the load on the blades and the whole machine. Therefore, the icing of the blades generally reduces the power generation and service life of the unit. In severe cases, it will directly lead to the long-term shutdown of the wind turbine and affect the normal power generation of the wind farm. Contents of the invention [0003] The purpose of the exemplary embodiments of the pres...

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Problems solved by technology

[0002] Wind turbines generally work in areas with abundant wind resources, and the environment they face is relatively harsh. In low-temperature or severe cold regions and seasons, the blades often freeze. Once the blades are covered with ice, the power output decreases, and the blade quality and There will be imbalance in aerodynamics, which will increase the load on the blades and the whole machine

Therefore, the icing of the blades generally reduces the power generation and service life of the unit. In severe cases, it will directly lead to the long-term shutdown of the wind turbine and affect the normal power generation of the wind farm.

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