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Method and system for reducing limit load of wind turbine set

A technology for extreme loads and wind turbines, which is applied in the control of wind turbines, wind power generation, wind turbines, etc., and can solve problems such as exceeding the design limit and overspeeding of the generator rotor

Active Publication Date: 2020-04-28
GUODIAN UNITED POWER TECH
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

During the sharp change of wind speed and direction, the hysteresis of PI output response will cause the generator rotor to overspeed, and if no additional measures are taken, the fan load will easily exceed the design limit

Method used

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  • Method and system for reducing limit load of wind turbine set
  • Method and system for reducing limit load of wind turbine set
  • Method and system for reducing limit load of wind turbine set

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Embodiment Construction

[0039] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0040] figure 1 It is a flow chart of the method for reducing the limit load of the wind turbine in the present invention. The method for reducing the limit load of the wind turbine set provided by the invention can reduce the limit load under the ECD wind condition. see figure 1 , the ultimate load reduction methods of wind turbines include:

[0041] S11, when it is detected that the fan speed changes rapidly, reduce the control target speed of the pitch PI control by a specified value.

[0042] S12, maintaining the reduced pitch PI control for a specified time of the control target rotational speed.

[0043] S13, controlling the pitch angle to the value of the...

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Abstract

The invention provides a method and a system for reducing limit load of a wind turbine set. The method includes the steps that when the rapid change of the rotation speed of a wind turbine is detected, the control target rotation speed of variable pitch PI control is reduced to a specified value; the specified time of the control target rotation speed of the variable pitch PI control after reduction is maintained; and the pitch angle is controlled to a value of the minimum pitch angle calculated according to the wind speed. According to the method and the system for reducing the limit load ofthe wind turbine set, the limit load of the wind turbine set can be effectively controlled.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a method and system for reducing the ultimate load of a wind turbine. Background technique [0002] In recent years, with the development of science and technology, variable speed and pitch wind turbines have been more and more widely used in the industry. PI control is the most commonly used control method in industrial production and is also widely used in variable speed and pitch wind turbines. In the process of sharp changes in wind speed and direction, the hysteresis of PI output response will cause the generator rotor to overspeed, and the load of the fan will exceed the design limit if no additional measures are taken. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method and system for reducing the ultimate load of a wind turbine, which can effectively control the ultimate load of the wind tu...

Claims

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Application Information

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IPC IPC(8): F03D7/00
CPCF03D7/00F05B2270/101F05B2270/32F05B2270/706Y02E10/72
Inventor 梁赛王文亮袁凌潘磊
Owner GUODIAN UNITED POWER TECH
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