Prediction type constant-speed box system and constant-speed control method for wind generating set

Abstract

The invention discloses a prediction type constant-speed box system and a constant-speed control method for a wind generating set. The system comprises a planetary gear train, a control gear, a power source, an anemometer and a controller, wherein the outer circumference of a gear ring of the planetary gear train is arranged to be a gear face meshing with the control gear, a planet carrier and a sun gear of the planetary gear train are fixedly connected with a wind wheel shaft and a generator main shaft of the wind generating set respectively, the power source is in transmission connection with the control gear, the controller is in control connection with the power source, and the anemometer is arranged in a working environment of the wind generating set and is in signal transmission connection with the controller. According to the method, the controller predicts a rotating speed of the wind wheel shaft according to anemometer data, a rotating speed of the control gear is controlled through the power source, and a rotating speed of the generator main shaft is kept constant to be a set target value. When external conditions change, a more stable output result can be obtained through active control, and wind energy is better utilized for power generation.

Description

technical field [0001] The invention relates to the field of constant speed control systems of wind power generators, in particular to a predictive constant speed box system and a constant speed control method of wind power generators. Background technique [0002] When the wind turbine generates power, the wind drives the impeller to rotate to form a mechanical torque, and then through the main shaft transmission chain, the gear box increases the speed to the speed required by the main shaft of the asynchronous generator, and generates power through the generator. The commonly used gear box has a constant speed ratio, so when the wind speed changes, the speed of the impeller will change, causing the speed of the main shaft of the generator to change after the gear box speeds up, and the frequency of the electric energy generated by the generator will fluctuate. As a result, the generated electric energy is reduced or directly loses its practical application value, and can o...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a predictive constant speed box system and constant speed control method for wind power generators, so as to solve the problem of unstable frequency of output electric energy existing in wind power generators in the prior art when the wind speed changes

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