Nonlinear predictive control method for acquiring maximum wind energy of variable-speed wind turbine generator system

A technology for wind turbines and nonlinear prediction, applied in the control of wind turbines, wind turbines, wind power generation, etc., to achieve high efficiency and superior performance

Active Publication Date: 2018-12-11
CENT SOUTH UNIV
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  • Claims
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Problems solved by technology

However, the existing predictive control techniques all use the linear model linearization method,

Method used

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  • Nonlinear predictive control method for acquiring maximum wind energy of variable-speed wind turbine generator system
  • Nonlinear predictive control method for acquiring maximum wind energy of variable-speed wind turbine generator system
  • Nonlinear predictive control method for acquiring maximum wind energy of variable-speed wind turbine generator system

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Embodiment Construction

[0044] The specific implementation manners of the present invention will be further described below in conjunction with the drawings and examples. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0045] Such as figure 1 As shown, it is a schematic flow chart of the non-linear predictive control method for obtaining the maximum wind energy of the variable-speed wind power generating set in the present invention. The methods include:

[0046] S1. Introducing a dynamic region to constrain the allowable range of generator torque;

[0047] S2. Determining a finite control set of candidate generator torques;

[0048] S3. Searching for an optimal generator torque sequence;

[0049] S4. Outputting the first element of the optimal generator torque sequence as a controller.

[0050] The nonlinear predictive control method for obtaining the maximum wind e...

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Abstract

The invention discloses a nonlinear predictive control method for acquiring the maximum wind energy of variable-speed wind turbine generator system. The method includes: introducing a dynamic area toconstrain the allowed range of generator torque; determining the finite control set of candidate generator torque; searching for optimal generator torque sequence; using the first element of the optimal generator torque sequence as the controller output. The method has the advantages that the optimal generator torque sequence is directly searched on the basis of a variable-speed wind turbine generator system nonlinear prediction model, so that the provided controller can sufficiently utilize a large prediction range; the method has high efficiency and excellent performance in maximum wind energy acquiring.

Description

technical field [0001] The invention relates to the field of industrial control, in particular to a nonlinear predictive control method for obtaining the maximum wind energy of a variable-speed wind power generating set. Background technique [0002] The maximum wind energy extraction (MWEE, maximum wind energy extraction) of large variable-speed wind turbines (VSWTs, variable-speed wind turbines) is achieved by tracking the maximum power point (MPP, maximum power point), that is, the optimal rotational speed of the impeller Dependent on wind speed, but increased moment of inertia and high turbulence hinder the realization of MPP tracking for large variable speed wind turbines. In order to improve the wind energy acquisition of variable-speed wind turbines, scholars have proposed some advanced prediction technologies, such as LIDAR (light detection and ranging) and advanced prediction methods, so as to use future wind information for control. For example, some scholars try ...

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Application Information

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IPC IPC(8): F03D7/00
CPCF03D7/00Y02A30/00Y02E10/72
Inventor 宋冬然杨建粟梅孙尧董密李力田小雨
Owner CENT SOUTH UNIV
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