Robust PSS design using Chaotic Optimization Algorithm for a multimachine power system

In this paper, a multiobjective design of the multi-machine power system stabilizers (PSSs) using chaotic optimization Algorithm (COA) is proposed. COA, which have the features of easy implementation, short execution time and robust mechanisms of escaping from local optimum, is a promising tool for engineering applications. The PSSs parameters tuning problem is converted to an optimization problem which is solved by a chaotic optimization algorithm based on Lozi map. The robustness of the proposed COA based PSSs (COAPSS) is verified on a multimachine power system under different operating conditions. The results of the proposed COAPSS are demonstrated through eigenvalue analysis and nonlinear time domain simulation.