Bifurcation analysis of various power system models

This paper presents the bifurcation analysis of a detailed power system mod el composed of an aggregated induction motor and impedance load supplied by an under-load tap-changer transformer and an equivalent generator and tran smission system. Different modeling levels with their respective differenti al-algebraic equations are studied, to determine the minimum dynamic model of the system that captures the most relevant features needed for bifurcati on studies of power systems. An aggregated model of a realistic load is use d to illustrate the ideas presented throughout the paper. (C) 1998 Elsevier Science Ltd. All rights reserved.