Transient stability enhancement by DSSC with fuzzy supplementary controller

Abstract

The distributed flexible alternative current transmission system (D-FACTS)is a recently developed FACTS technology. Distributed Static Series Compensator (DSSC) isone example of D-FACTS devices. DSSC functions in the same way as a Static Synchronous Series Compensator (SSSC), but is smaller in size, lower in price, and possesses more capabilities. Likewise, DSSC lies in transmission lines in a distributed manner. In this work, we designed a fuzzy logic controller to use the DSSC for enhancing transient stability in a two-machine, two-area power system. The parameters of the fuzzy logic controller are varied widely by a suitable choice of membership function and parameters in the rule base. Simulation results demonstrate the effectiveness of the fuzzy controller for transient stability enhancement by DSSC.