JES_V1_N2_RP3 Surendra Varigonda G. Srinivasulu Journal on Embedded Systems 2278 - 7895 1 2 19 26 Power System Stabilizer, Synchronous Machine, Single Machine Infinite Bus System, Fuzzy Logic, Simulink The performance of fuzzy-logic power system stabilizer (FPSS), which is tuned automatically as the operatin conditions of power system change, is investigated by applying it to a single-machine power system. FPSS is developed using speed deviation and the derivative of speed deviation as the controller inputs variables. Two scaling parameters are introduced to tune the FPSS. These scaling parameters are the output of another fuzzy-logic system (FLS), which gets its inputs from the operating condition of the power system. The performance of the fuzzy PSS (FPSS) is compared with the conventional power system stabilizer (CPSS). The simulations were tested under different with different membership functions such as trapezoidal, triangular and Gaussian membership functions. The simulation results are quite encouraging and satisfactory. May - July 2012 Copyright © 2012 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=1892