Systematic approach to performance weights selection in design of robust H-infinity PSS using genetic algorithms

Selection of suitable performance weights is the main problem in design of a robust H-infinity power system stabilizer (PSS). In this paper, a systematic and automated approach based on Genetic Algorithms (GAS) is proposed. It gives rise to selection of optimal performance weights without any trial and error attempt. The resulting H-infinity PSS performs quite satisfactorily under a wide range of turbo-generator operating conditions and is robust against unmodelled low-damped torsional modes. It also provides sufficient robustness against significant changes in transmission line configuration and parameters.