Enhancement of Transient Stability Limit Using Fuzzy Controlled TCSC

30 ISSN: 2278 – 7798 All Rights Reserved © 2015 IJSETR Abstract: Whenever a Power system is subjected to sudden changes in load levels then stability is an important concept which determines the stable operation of power system. For the accurate analysis of transient stability requires a detailed modelling of generating units and other equipment. In general rotor angle stability is taken as index, but the concept of transient stability, which is the function of operating condition and disturbances deals with the ability of the system to remain intact after being subjected to abnormal deviations. In this paper studies have been carried out in order to improve the Transient stability of WSCC 9 bus system with fixed compensation on lines and optimal location have been investigated using “Trajectory Sensitivity Analysis” for better result. In order to improve the Transient Stability a series compensated FACT Device TCSC have been implemented. The case study depict the optimal location of fixed compensation in WSCC-9 Bus system based on the stability index (ETA). Further a fuzzy controlled TCSC has been implemented on WSCC-9 bus system to improve stability of the system. The fuzzy controlled TCSC is observed to perform better, compared to conventional PI controller.