Review of conventional power system stabilizer design methods

In the past two decades, the utilization of supplementary excitation control signals for improving the dynamic stability of power systems has received much attention. In recent years, several approaches based on modern control theory and intelligent control and optimization techniques have been applied to PSS design problem. This paper introduces a review on the techniques applied on the conventional PSS design only. The techniques could be mainly classified into linear and nonlinear. Each classification includes several design methods which make the PSS more effective and robust in damping out the low frequency oscillations.