A Fuzzy Controlled Pitch Angle in a Permanent Magnet Synchronous Generator Type Wind Energy Conversion System

Abstract

Controlling technique of the pitch angle is an efficient mechanism to control the mechanical torque of the wind turbine system during a strong wind beyond the rated operating wind speed of the turbine. To control the pitch angle, we have to choose generator’s electrical power, rotor speed, wind speed, and the turbine power coefficient as control parameters. In this article, a pitch angle controller based on fuzzy logic is introduced using the PMSG power as a control variable and wind speed as a sensitivity parameter to improve the control performance of the controller. The fuzzy logic controller is designed and its effectiveness is compared to the PI controller and fixed pitch angle control mechanisms. The simulation result shows that the fuzzy logic pitch angle controller has superior performance at various operation conditions when it was compared to the PI and fixed angle pitch control mechanisms.