H∞ loop shaping based robust power system stabilizer for dynamic equivalent multi-machine power system

This paper describes a method of designing Glover-McFarlane H_∞ loop shaping based Robust Power System Stabilizer (RPSS) for a coherency based dynamic equivalent large power system. Group of coherent generators are identified on the basis of the equal acceleration. The dynamic equivalent parameters are determined by structure preservation of the coefficient matrices in a time-domain representation of the machines. Simulink models are developed for the original as well as for the dynamic equivalent system. The proposed method is applied to the well-known IEEE, 10-machine, 39-bus, New England Test System. The simulation is carried out for different types of faults and the results of RPSS are compared with the conventional PSS (CPSS).