A new approach using optimization for tuning parameters of Power System Stabilizers

This paper presents a new method based on the optimization method for tunin g the parameters of the Power System Stabilizers (PSS) to enhance small-sig nal stability. A general-purpose nonlinear programming package is used to m inimize the real part of the dominant eigenvalue in the system without impl ementing the eigensensitivities. The basic control theory and the root-coef ficient relationship for polynomial equations are incorporated for obtainin g the equality constraints. The PSS parameters bound in a set are formulate d as the inequality constraints. A comparative result for a small-signal st ability problem validates the applicability of the proposed method.