There are different ways to limit the power in very high winds to protect wind turbine from the
damage. There are fixed-speed fixed-pitch (stall controlled), fixed-speed variable-pitch, variable-speed fixed-pitch and variable-speed variable-pitch. In this study we will concentrate on variable-speed fixedpitch control. The variable-speed operation increases the energy capture at low wind speeds. Therefore, at high wind speed, power is regulated by stall control with decreased rotational speeds to increase the angle of attacks.