Determine power transfer limits of an SMIB system through linear System Analysis with nonlinear simulation validation

This paper extends the materials presented in Chapter 7 of a classic textbook “Power System Analysis” [1] used in EEL 6936 Power Systems II at University of South Florida. This research examines the effect of automatic voltage regulator (AVR) and the power system stabilizer (PSS) on the power transfer level. The system analyzed in this paper includes a synchronous generator connected to an infinite bus. Their effect on stability is investigated through plotting eigenvalues of closed-loop transfer functions along with Routh-Hurwitz stability criterion examination. Three different models are considered. The basic model includes a swing equation with one order rotor flux dynamics. This model is classified as an electromagnetic model (EMT). Then, the voltage control part is added (EMT+AVR). Finally, the power system stabilizer is added to the system (EMT+AVR+PSS). These models are linearized for analysis. Nonlinear simulation results based on the nonlinear models built in Matlab/Simulink validate the analysis results.