Transient Stability Enhancement in Power System Using DSSC and DSSC with FLC

Long distance AC transmission system is often subjected to stability problems which limit the transmission capability. Large power systems often suffer from weakly damped swings between synchronous generators. This paper aims to enhance the transient stability of the power system with the use of distributed static series compensator (DSSC) and DSSC with fuzzy logic controller (FLBDSSC). First of all, a detailed simulation model of the DSSC has been presented. DSSC has a function like static synchronous series compensator (SSSC) but is in smaller size and lower price along with more other capabilities. Likewise, DSSC lies in transmission lines in a distributed fashion. In this work, we designed a fuzzy logic controller to use the DSSC for enhancing transient stability in 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.

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