Wind turbine generator pitch angle control method

A technology of wind turbines and control methods, which is applied in the control of wind turbines, wind power generation, wind turbines, etc., can solve problems such as complex calculations, poor load optimization effects, and inaccurate feed-forward pitch angle information, and achieve the design process Simple, improve constant value adjustment performance, reduce the effect of frequent actions

Active Publication Date: 2019-11-15
风脉能源(武汉)股份有限公司
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for controlling the pitch angle of wind turbines. The present invention aims at the poor load optimization effect caused by the inaccurate feed-forward pitch angle information in traditional feed-forward-feedback pitch angle controllers and the need Complicated calculations due to the linear model of the unit

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  • Wind turbine generator pitch angle control method

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Embodiment

[0111] In order to quantitatively compare the load optimization effect of the feedforward-feedback controller based on effective wind speed estimation proposed by the present invention and the traditional (based on the look-up table method) feedforward-feedback controller, it is necessary to explain the load evaluation indicators of the key components of the unit. For the pitch system, the present invention uses the following index (PF, Pitch Fatigue) to evaluate:

[0112]

[0113] Among them, β(k) is the pitch angle of the wind turbine, and the unit of the above index is deg / s, which reflects the β In seconds, the average pitch angle change per second can better evaluate the load of the pitch system. For other key components of the unit, including blades (BR, Blade Root,), hubs (FH, Fixed Hub,), towers (TB, TowerBottom), pitch bearings (PB, Pitch Bearing), use DEL (Damage Equivalent Loads, small loads such as damage) to evaluate.

[0114] This embodiment uses the wind po...

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Abstract

The invention relates to a wind turbine generator pitch angle control method which comprises the following steps: establishing an ELM based effective wind speed estimation model; obtaining effective wind speed information and corresponding output data within a period of time to train the effective wind speed estimation model; obtaining a feedback control signal: establishing a wind turbine generator digital model; defining an adjusting error, solving dynamic characteristics and a preliminary expression of a feedback control signal; estimating uncertainty and interference term of the mathematical model of the wind turbine generator; carrying out conversion treatment on the preliminary expression to obtain the feedback control signal; obtaining a feedforward control signal: and obtaining thepitch angle signal in the effective wind speed information and the unit corresponding output data within a period of time, and training the wind turbine generator dynamic nonlinear wind speed-pitch angle relation model, wherein the model can give the feedforward control signal on line in real time. With adoption of the wind turbine generator pitch angle control method, the situations that the load optimization effect of the traditional pitch angle controller is poor caused by inaccurate feedforward pitch angle information and the calculation is complicated caused by a unit linear model are avoided.

Description

technical field [0001] The invention belongs to the technical field of wind power generator control, and in particular relates to a method for controlling the pitch angle of a wind power generator. Background technique [0002] In the past few decades, wind power technology has developed rapidly around the world. According to the Global Wind Power Outlook report released by the Global Wind Energy Association, if the current growth rate can be maintained, 30% of global energy consumption will be provided by wind power by 2030. However, the high cost of wind power and the intermittency and uncertainty of wind energy are still the main factors restricting the rapid development of wind power and large-scale grid connection. As a key technology in the field of wind power technology, intelligent control is an effective way to solve the above problems, and the intelligent control technology of wind turbines has always been monopolized by Western developed countries such as Germany...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/02
CPCF03D7/0224Y02E10/72
Inventor 杨秦敏焦绪国叶毅陈积明李思亮严宁邹小标
Owner 风脉能源(武汉)股份有限公司
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