Uncertainty modeling of a PSS3B Power System Stabilizer

Abstract

Power systems are dynamic systems subject to disturbances, which can lead to unstable system operating conditions. For that, the Power System Stabilizer (PSS), which it is a complementary excitation controller, is used for damping electromechanical oscillations present in the power system, ensuring stability. In this paper, a robust stability test is proposed for the PSS3B stabilizer using an unstructured modeling. The limits of stability of the PSS3B stabilizer are found using additive uncertainty for a Single-Input Multiple-Output (SIMO) model. The proposed test is explained and is validated through simulations.