Simulating and Comparing the Fuzzy and DTC Control Methods of Doubly Fed Induction Generator

One of the most widely used methods for the utilization of wind energy is the use of doubly fed induction generator. The doubly-fed generators are better in the applications of limited-range speed control and large capacity case due to the partially rated inverter, high reliability and lower cost. This study presents two different approaches to control doubly fed induction generator. Two cases of the best and most privileged control methods, fuzzy and direct torque control are implemented. Control methods were investigated and their performance was analyzed and compared based on the results of the simulation. In addition to, the Grid side is controlled by direct torque control based on a grid voltage position to obtain a constant DC voltage. The results indicate that fuzzy control scheme is more complicated than Direct Torque Control and Sensitivity to variation machine parameters in Direct Torque Control method is less than Fuzzy, but the response of fuzzy method is smoother than Direct Torque Control.

Doubly-fed induction generator, Back to back converter, Direct Torque Control, Fuzzy control.