PSO based robust power system stabilizer design using H∞ loop shaping technique

Power system stabilizer (PSS) is used to provide damping to the generator's oscillations. The damping is achieved through modulation of generator's excitation so as to provide adequate electrical torque to the rotor speed deviations. In this paper a particle swarm optimization (PSO) based robust power system stabilizer design using H∞, loop shaping technique is reported. Weighting function selection and the lead lag compensator based controller parameters has been designed using PSO algorithm. This design is based upon normalized coprime factorization H∞ loop shaping technique by McFarlane-Glover. The efficacy of robust power system stabilizer (RPSS), designed through this method has been demonstrated by simulation of a simple single machine infinite bus (SMIB) system for various loading conditions using MATLAB.