R. Oulad Ben Zarouala
ABSTRACT
Reduction of cost production for wind energy requires enhanced control technology which is able to extract optimum power from the kinetic energy of wind. This paper focused on the control of variable speed wind turbine for maximization of extracted power at the below rated wind speed regime. Among the important challenges in this field, one finds the need to deal with the design of controllers that are able to deal with the flexibility of the wind turbine installation, since this last can be the cause of significant perturbations. Using a four-degrees-of-freedom mechanical model that integrates flexibility of a wind turbine in terms of drive train torsion, tower flexure and blades out-of-plane flexure, an integral sliding mode controller was developed in this work. The stability of the obtained control system was assessed by using Lyapunov approach. Simulations results are presented to evaluate efficiency of this controller.
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