ROBUST PSS DESIGN FOR MULTI MACHINE POWER SYSTEM USING H∞ LOOP SHAPING TECHNIQUE

Abstract

This paper describes a novel method of designing an H∞ loop shaping based Robust Power System Stabilizer (RPSS) for multi-machine power system. Based on the latest development of non-linear H∞ robust control theory, a control design is applied to stabilize the linearized uncertain system using Glover-McFarlane loop shaping technique. In this paper, RPSS design is presented for IEEE 10 machine 39 bus system, using Glover-McFarlane H∞ loop shaping technique. Guidance for setting the feedback configuration for loop shaping and synthesis are also presented. After obtaining the controller, non-linear simulations are performed and comparisons of the performances are made with the Conventional PSS (CPSS) and the resulting RPSS for a 3-phase fault. The justification of robustness is also provided by comparing RPSS with CPSS by considering 3 different operating points.