An adaptive fuzzy logic based power system stabilizer for enhancement of power system stability

This paper presents the performance of fuzzy logic based adaptive power system stabilizer (PSS) for stability enhancement of Single Machine Infinite Bus power system. The PSS is used to generate supplementary control signals for the excitation system in order to damp the low frequency power system oscillations. Here speed deviation and accelerated power are the two inputs to the fuzzy logic controller. The inference mechanism of the fuzzy logic controller is represented by 49 if-then rules. The performance of the fuzzy logic power system stabilizer (FLPSS) and without power system stabilizer was compared. The simulations were tested under different types of conditions.