Comparative Study of MPPT and Pitch Angle using PI and Fuzzy Logic Controllers

To extract the maximum power when wind speed is below rated speed, and to adapt the aerodynamic torque of wind turbine (WT) when the wind speed is above rated speed many control strategies were discussed. In this work a comparative study using conventional (PI) strategy and fuzzy logic controller (FLC) for both Maximum Power Point Tracking (MPPT) and Pitch angle control strategies is developed. As the conventional strategy requires a well-known mathematical model, the fuzzy logic does not need the system knowledge and it has a good potential with nonlinearities such as strong wind disturbances. The simulation results demonstrate that the fuzzy logic controller is robust and can reach better and improved control performance than the conventional control strategy, namely reference tracking, high sensitivity to high wind speed variation and nonlinearities.