A synchronous generator stabilizer based on a universal model

Abstract

A power system stabilizer (PSS) based on a universal model is developed. The universal model is proposed to approximate an arbitrary system using the input-output data only rather than a mathematical model. The conventional LQR (Linear Quadratic Regulator) method is adapted for PSS design based on a universal model. A state observer is not needed in the proposed PSS by defining state variables as input-output data. The proposed PSS has the advantage of using very few design parameters compared with conventional PSS, which are designed based on mathematical models of controlled systems. The proposed PSS is applied to a typical single-machine infinite-bus power system. Simulation results under various operating conditions show that the proposed PSS is comparable to conventional PSS in loading conditions and system failures.