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Non-linear prediction pitch control method based on wind speed in-advance measuring

A technology of nonlinear prediction and control methods, which is applied in the control of wind turbines, engine control, wind power generation, etc., and can solve problems such as unit overspeed and extreme loads

Pending Publication Date: 2019-07-19
CENT SOUTH UNIV
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Problems solved by technology

[0003] The present invention provides a nonlinear predictive pitch control method based on wind speed measurement in advance, the purpose of which is to solve the problem that the traditional control method easily leads to overspeed and extreme load of the unit under the wind condition with fast changing wind speed

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  • Non-linear prediction pitch control method based on wind speed in-advance measuring

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Embodiment Construction

[0040] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0041] Aiming at the problem that the existing control method easily leads to the overspeed and extreme load of the unit under the wind condition with rapidly changing wind speed, the present invention provides a non-linear predictive pitch control method based on wind speed measurement in advance.

[0042] Such as figure 1 As shown, embodiments of the present invention provide a nonlinear predictive pitch control method based on wind speed advance measurement, including:

[0043] Step 1, introducing a dynamic region to constrain the preset allowable range of a given pitch angle change rate of the wind turbine;

[0044] Step 2, determining the finite control set of the given pitch angle change rate of the candidate wind turbine within the preset allowab...

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Abstract

The invention provides a non-linear prediction pitch control method based on wind speed in-advance measuring. The method comprises the steps of firstly, introducing a dynamic area to restrain the preset allowable range of the given pitch angle change rate of a wind generating set; secondly, within the preset allowable range, determining the limited control set of the given pitch angle change rateof a candidate wind generating set; thirdly, through the limited control set, searching the given pitch angle change rate sequence of an optimal wind generating set; and fourthly, taking the first element of the given pitch angle change rate sequence of the optimal wind generating set as the controller output. The non-linear prediction pitch control method based on wind speed in-advance measuringhas the important effect on unit safety, stability and efficient running.

Description

technical field [0001] The invention relates to the technical field of wind turbine control systems, in particular to a nonlinear predictive pitch control method based on wind speed advance measurement. Background technique [0002] In the existing technology, the traditional control calculation method of variable pitch control mostly takes the wind rotor speed as the input and the pitch angle as the output, that is, according to the real-time speed of the wind rotor, the pitch angle is obtained through the proportional integral control algorithm, and then the pitch angle is obtained by the variable The propeller actuator realizes the tracking of the pitch angle, controls the blades to rotate to the obtained pitch angle, and then realizes the control of the speed of the wind rotor. With the increase of the unit capacity of the wind turbine and the lengthening of the wind rotor blades, the moment of inertia of the wind rotor increases and the lag time of the speed control of ...

Claims

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Application Information

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IPC IPC(8): F03D7/00
CPCF03D7/00F05B2270/328Y02E10/72
Inventor 宋冬然杨建粟梅孙尧董密李娅郑松岳方灵琦
Owner CENT SOUTH UNIV
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