Different Types of Pitch Angle Control Strategies Used in Wind Turbine System Applications

Wind energy is the most accessible source and is one of the fastest growing renewable energy systems. If this energy is exploited properly and well-suited to the turbine system, it would have the ability to compete economically and even be superior to other sources. For this purpose, in the high wind speed areas different methods are applied in the bases of harvesting as much wind energy as possible with respect to harness rotor speed at the rated value. In this paper, an extensive literature review on control and manufacturing strategies in power production and system performance of wind energy conversion system (WECS) has been highlighted. Classic control, adaptive non-linear control, robust control and intelligent control are among the control methods presented in this study. In comparing the controllers, although adaptive and robust controllers, with less sensitivity to changes in environmental conditions, outperformed the classic controller, and the intelligent controller presented better control flexibility and power quality through estimating the system variables and appropriate adaptation to changes at the operating point.