Wind turbine efficiency optimization. Comparative study of controllers based on second order sliding modes

C. EVANGELISTA; P. PULESTON; F. VALENCIAGA

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

PERGAMON-ELSEVIER SCIENCE LTD

Año: 2010 vol. 35 p. 5934 - 5939

0360-3199

This paper studies the applicability of second order sliding mode control strategies to a wind energy conversion system aiming to optimise its power conversion efficiency. Four different controllers are designed and analysed, based on the ‘‘sub-optimal’’, ‘‘twisting’’, ‘‘super-twisting’’ and ‘‘with a prescribed law of variation’’ algorithms, which present finitetime convergence, robustness, chattering and mechanical stress reduction, and are of quite simple online operation and implementation. Representative simulation results are shown, using a complete model of the system under realistic operating conditions, where the performance of the controlled system can be appreciated for each of the controllers and some comparisons can be made.