Simulink-Based Program for Simulating Multi- Machine Power Systems

This paper presents a Simulink-based package program for modeling, simulating, and analyzing multi-machine power systems. The package can be used as a teaching tool or for research studies. The synchronous generators are modeled using the detailed sixth-order model, and are equipped with exciter and turbine systems. The algebraic equations (AEs) are coded in MATLAB separately, and incorporated into the Simulink model as a user-defined function block. The numerical Newton's method is used for solving these AEs simultaneously. IEEE 68- bus systems is employed as the test system. Moreover, a comparison between the proposed package and other available tool that is based on Simulink is presented. The obtained results demonstrate the capability of the package for solving large multi- machine power systems. The model is also free of algebraic loops that may increase the errors and slow down the simulation.