Variable pitch control method of wind generating set

A technology of a wind turbine generator set and a control method, which is applied to the control of wind turbines, engine control, wind turbines and other directions, can solve the problems of pitch change jumping, threatening the operation safety of the wind turbine generator set, and large vibration of the wind turbine generator set. The effect of reducing overspeed and ensuring normal and stable operation

Pending Publication Date: 2022-03-08
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Problems solved by technology

The command value is a constant value, so it may cause a jump in the pitch rate, which may cause a lar...

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  • Variable pitch control method of wind generating set
  • Variable pitch control method of wind generating set
  • Variable pitch control method of wind generating set

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Embodiment Construction

[0037]The following detailed description is provided to assist the reader in gaining an overall understanding of the methods, devices and / or systems described herein. However, various changes, modifications and equivalents of the methods, apparatus and / or systems described herein will be apparent after understanding the disclosure of the present application. For example, the order of operations described herein are examples only, and are not limited to those orders set forth herein, but, except for operations that must occur in a particular order, may occur as will become apparent after understanding the disclosure of this application. That's changed. Also, descriptions of features that are known in the art may be omitted for increased clarity and conciseness.

[0038] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein have been provided to illustra...

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Abstract

The embodiment of the invention provides a variable pitch control method of a wind generating set. The variable pitch control method comprises the steps that the overspeed percentage of the rotating speed of a generator of the wind generating set and the overspeed percentage change rate are obtained; and determining the additional variable pitch rate of the wind generating set by using a fuzzy control method based on the obtained overspeed percentage of the rotating speed of the generator of the wind generating set and the overspeed percentage change rate. The additional variable pitch rate of the wind generating set determined by the method is a continuously changing numerical value, so that the wind generating set can reduce the overspeed trend, vibration of the wind generating set cannot be caused, and normal and stable operation of the wind generating set is ensured.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a pitch control method of a wind power generating set. Background technique [0002] The blade group of the wind turbine is usually connected to the generator through a speed-increasing gearbox, so that when the wind force is small and the blade speed is slow, the gearbox can increase the speed of the generator to improve the power generation efficiency of the wind generator; however, in In disastrous weather such as hurricanes, strong winds increase the speed of the blade group, which may cause the generator to rotate at an overspeed. In the case of overspeed, the generator may be overloaded and damaged or even burned, shortening the service life of the wind turbine. [0003] For over-rotating speed, it can be alleviated by pitching the wind turbine. Adjust the angle of the blade according to the wind speed, and change the power factor by changing the angle of the...

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Application Information

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IPC IPC(8): F03D7/00
CPCF03D7/00F05B2260/70F05B2270/707F05B2270/327Y02E10/72
Inventor 刘忠朋
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