An Analytical Design Method for Power System Stabilizers Based on H∞ Specifications

Abstract

This paper presents an analytical design approach for power system stabilizers (PSS) aimed at effective damping of electromechanical oscillations in synchronous generators. The method combines automatic frequency-domain identification based on swept-sine excitation with an analytical controller design method using H∞ specifications. Design constraints, including robustness and damping requirements, are transformed into regions in the parametric plane of fixed-structure controllers, enabling multi-objective and multi-model design without numerical optimization. The approach is applicable to standard PSS structures with lead–lag compensators and washout filters and supports models with uncertainty and varying operating conditions.