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

This paper describes a method of designing H∞ loop shaping based robust power system stabilizer 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. H∞ loop shaping based robust power system stabilizer is designed for a dynamic equivalent large power system. The method is applied to the well-known IEEE, 10-machine, 39-bus, New England Test System The developed equivalent system has good accuracy in representing the dynamic characteristics of the original system. Results and simulation show that designed H∞ loop shaping based robust power system stabilizer stabilizes the power system very effectively.