Design & Development of Fuzzy Logic Controller based Power System Stabilizer

In this Paper, a systematic approach to fuzzy logic controller based power system stabilizer (FLPSS) is designed for stability enhancement of a single machine infinite bus system. In order to accomplish the stability enhancement, speed deviation and acceleration of the rotor of synchronous generator were taken as the inputs to the fuzzy logic controller. These variables take significant effects on damping the generator shaft mechanical oscillations. The stabilizing signals were computed using the fuzzy membership function depending on these variables. The performance of the system with FLPSS is compared with the system having Conventional PSS (CPSS) and system Without PSS (WPSS). Simulation results show the FLPSS gives better performance than the CPSS. The simulations were tested under different operating conditions, and also tested with different numbers and types of membership functions.