Pitch control method and device, computer readable storage medium

Abstract

The invention discloses a variable pitch control method and device and a computer readable storage medium. The variable pitch control method comprises the steps of judging whether or not variable pitch speed compensation operations need to be executed on a wind power electricity generator unit according to variable pitch working condition data in the variable pitch process; according to the judging result, determining execution of the variable pitch speed compensation operation, wherein the variable pitch speed compensation operations comprise speed compensation performed on the given variablepitch speed output by a pitch angle feedback regulator according to the variable pitch working condition so that the angle difference between the actual pitch angle and the given pitch angle can be within the first preset angle error allowance range, and variable pitch operation performed by controlling the wind power electricity generator unit according to the compensated given variable pitch speed. According to the technical scheme, the pitch angle can be effectively compensated for along with errors, and the phenomenon that safe and stable operation of the wind power electricity generatorunit is affected by pitch regulation lag is avoided.

Description

technical field [0001] The present invention relates to the technical field of wind power generation, in particular to a pitch control method and device, and a computer-readable storage medium. Background technique [0002] The pitch system is an important part of the wind turbine, which is used to change the amount of wind energy captured by the blades by adjusting the pitch angle of the blades, so that the output power of the wind turbine can be kept stable. However, due to problems such as communication delay and pitch motor release delay in the pitch control system, there is a pitch angle following error in the pitch angle adjustment process. For example, if the given pitch speed is 3 degrees / s, The pitch angle following error may reach 1.5 degrees, resulting in a certain lag in the pitch angle adjustment, which is about 500 milliseconds to 1 second. The pitch angle adjustment lag will cause problems such as overshooting of the pitch angle position and slow response tim...

AI Technical Summary

Problems solved by technology

However, due to problems such as communication delay and pitch motor release delay in the pitch control system, there is a pitch angle following error in the pitch angle adjustment process. For example, if the given pitch speed is 3 degrees / s, The pitch angle following error may reach 1.5 degrees, resulting in a certain lag in the pitch angle adjustment, about 500 milliseconds to 1 second

The pitch angle adjustment lag will cause problems such as overshooting of the pitch angle position and slow response time, which not only makes the blades unable to capture wind energy to the maximum extent, but also easily leads to excessive speed of the wind turbine, affecting the safe and stable operation of the wind turbine.

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