Design Fuzzy Logical Power System Stabilizer to Damp Low Frequency Oscillation of Power System

Abstract

This paper proposed a Fuzzy Logic Controller for Power System Stabilizer (FLPSS) to enhance the performance of a Single Machine Infinite Bus (SMIB) system under steady state and dynamic conditions of the electrical power system. The proposed FLPSS utilizes two signals; namely speed deviation and change in speed deviation as two inputs variable. Each input variable has seven linguistic variables and totally they form forty nine fuzzy rules for controlling the stabilizer. The effectiveness of the proposed fuzzy stabilizer is demonstrated by simulation in Matlab/Simulink of SMIB system, and the performance for damping low frequency oscillations in power system is better compared with Conventional Power System Stabilizer (CPSS) under small perturbation and three-phase fault.