Method and device for recognizing variable pitch abnormities of wind generating set

Abstract

The embodiment of the invention provides a method and device for recognizing variable pitch abnormities of a wind generating set. The method comprises the steps that a variable pitch speed signal of the wind generating set is obtained; and whether the variable pitch abnormities occur or not is determined according to the variable pitch speed signal, wherein the variable pitch abnormities comprise the variable pitch speed pinion abnormity or the variable pitch speed peak abnormity. When the wind generating set is in a variable pitch abnormity state before a variable pitch failure occurs, the variable pitch abnormity state, especially the variable pitch speed pinion abnormity or the variable pitch speed peak abnormity, can be quickly recognized, then the variable pitch abnormity state can be handled in time, key components like a variable pitch motor are effectively prevented from being damaged, and the active power output by the wind generating unit 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 as follows: 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 required value of the pitch speed 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 the demand value...

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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