Regulation control method and device for large wind turbine generator system

Abstract

The invention relates to a regulation control method and device for a large wind turbine generator system and belongs to the technical field of wind turbine generators. According to the method, a rotor acceleration value is collected in real time, when the rotor acceleration value is greater than a set rotor acceleration limit, the rotor acceleration value multiplied by a specific gain factor is taken as a target variable-pitch rate; otherwise a real-time generator speed is collected, when the generator speed is greater than a set generator speed threshold, the gain of a variable-pitch PID (Proportion Integral Derivative) controller is corrected according to the pitch angle of the wind turbine generator system and the ratio of the difference between the generator speed and the set generator speed threshold to the set generator speed threshold, and the variable-pitch rates of blades are controlled by the corrected variable-pitch PID controller. Through the method and the device, a quick and timely response of a variable-pitch system to an extreme gust is guaranteed to reduce the load on blade roots and guarantee the safety of an entire machine; and meanwhile, in the case of an extreme ascending / descending gust nearby a rated wind speed, the rotor speed is prevented from rapidly increasing, so that the frequency of shutdown caused by overspeed is reduced, and the utilization ratio of a wind turbine generator is improved.

Description

technical field [0001] The invention relates to a method and device for regulating and controlling a large-scale wind power generating set, and belongs to the technical field of wind power generators. Background technique [0002] Pitch PID (proportion, integral, derivative) controller has simple control algorithm, good robustness, high reliability, and high adjustment ability. The most commonly used type of controller. refer to figure 1 , figure 1 It is a graph of the relationship between wind speed and time of a fast and extremely changing gust; the figure only shows the change of wind speed within a certain period of time, and the change of wind speed in other time periods of the change of the gust is similar to this, which is omitted in the figure. In actual operation, wind turbines are often impacted by fast and extremely changing strong gusts. Such as figure 1 As shown, the wind speed of this gust rises and falls very rapidly. When a wind turbine encounters such ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method and device for regulating and controlling a large-scale wind power generating set to solve the problem that the blade root load is too large or even greater than the design load when the set encounters a fast and extremely changing gust of wind

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