2010
IMAACA 2010 Proceeding
Switching multimodel LQ controllers for variable speed and variable pitch wind turbines
Authors: Nadhira Khezami, Naceur Benhadj Braiek, Xavier Guillaud
Abstract
This paper deals with the design of two gain scheduled linear quadratic (LQ) controllers for variable speed, pitch regulated wind turbines in the whole plant operating area. Depending essentially on the wind speed, the wind turbine operating range can be divided into two different zones. Each LQ controller is then valid in a specific operating zone and has different control objectives. And the system switches between them during the transitions from one operating zone to another in order to ensure a good level of performances in the whole plant operating area. The design of the LQ controllers is based on a multimodel description of the nonlinear plant. The good performances of the proposed approach are illustrated on a 2MW wind turbine.
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