This article investigates a new sliding mode control structure for a variable speed wind
turbine, in order to maximize the captured wind energy and to reduce the transient loads
(shafts vibration) caused by the fast fluctuation of wind speed. The variable speed wind
turbine control presents a difficult problem because of the nonlinearities of equivalent
mathematical models and the effects of external disturbances (wind speed fluctuation). The
sliding mode technique is a nonlinear control, widely used in this field; this is due to its …