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Sliding mode control strategy for variable speed wind turbine

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2 Author(s)
Barambones, O. ; Autom. Control & Syst. Eng. Dept., Univ. of the Basque Country, Vitoria, Spain ; de Durana, J.M.G.

The efficiency of the wind power conversions systems can be greatly improved using an appropriate control algorithm. In this work, a robust control for variable speed wind power generation that incorporates a doubly feed induction generator is described. The electrical systems incorporates a wound rotor induction machine with back-to-back three phase power converter bridges between its rotor and the grid. In the presented design it is applied the so called vector control theory. The proposed control scheme uses stator flux-oriented control for the rotor side converter bridge control and grid voltage vector control. The proposed robust control law is based on a sliding mode control theory, that, as it is well known, presents a good performance under system uncertainties. The stability analysis of the proposed controller under disturbances and parameter uncertainties is provided using the Lyapunov stability theory. Finally simulated results show, on the one hand that the proposed controller provides high-performance dynamic characteristics, and on the other hand that this scheme is robust with respect to the uncertainties that usually appear in the real systems.

Published in:

Emerging Technologies & Factory Automation, 2009. ETFA 2009. IEEE Conference on

Date of Conference:

22-25 Sept. 2009