Interval type-2 fuzzy logic controller design for TCSC

Interval type-2 fuzzy logic controller (IT2FLC), which is a special type of type-2 fuzzy logic controller, is evolving as an alternative type of fuzzy logic controller (FLC) in most of the complex, nonlinear and uncertain systems due to its more uncertainty handling capacity in the last years. In this paper an IT2FLC is designed by exploring the property of type-2 fuzzy sets as a thyristor control series capacitor (TCSC) to improve the power system damping of a single machine system. The performance of the proposed controller is compared with the existing differential evolutionary optimization tuned lead lag compensator and very popular conventional FLC based TCSC design, respectively. The proposed controller performance is also tested with effect of applied disturbance and noise. Simulation results demonstrated the better performance of the proposed controller and the idea to test for the application of type-2 fuzzy logic system as a TCSC controller is succeeded. © 2013 Springer-Verlag Berlin Heidelberg.