Identifying method and device of abnormal pitch change of wind turbine generator system

Abstract

The invention provides an identifying method and a device of abnormal pitch change of a wind turbine generator system. The method comprises the steps of: obtaining a pitch angle signal of each blade; and determining if the abnormal pitch change occurs according to the pitch angle signal of each blade, wherein the abnormal pitch change comprises the pitch angle jump or the pitch angle desynchrony. The method can quickly identify the abnormal pitch change state, in particular the pitch angle jump or the pitch angle desynchrony when the wind turbine generator system is located in the abnormal pitch change state before the pitch change failure, so that the abnormal pitch change state can be timely treated, the damage of such key parts as a pitch change motor is effectively prevented, and the active power output by the wind turbine generator system is effectively improved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of wind power generation, and in particular to a method and device for identifying abnormal pitch of a wind power generating set. Background technique [0002] The pitch control of the wind turbine is a process of determining the pitch speed according to the wind speed, and then adjusting the pitch angle of the blades. The principle of pitch control is: the anemometer on the engine room measures the wind speed, and transmits the wind speed information to the tower bottom cabinet. The controller in the tower bottom cabinet analyzes the wind speed information and calculates the pitch speed demand value, and sends the pitch information The demand value is transmitted to the center box of the hub pitch system, and the center box transmits the demand value of the pitch speed to the three axle boxes, and the axle box adjusts the pitch angle of the blade through the pitch drive according to th...

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a method and device for identifying abnormal pitch of a wind power generator set, which solves the problem that the pitch change processing method in the prior art cannot identify the abnormal state from an early stage, causing the wind power generating set to run in an abnormal state for a long time and cause wind power Technical problems such as the decrease of active power output by the generator set and the damage of key components such as pitch motors

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