Numerical and experimental analysis of core loss modeling for period-1 ferroresonance

Abstract

Iron losses strongly influence ferroresonance behavior of power transformers. Core losses have a great importance on the lower limit of the voltage source interval where a fundamental ferroresonance regime exists. This paper is concerned with comparing analytical nonlinear core loss models implemented to fundamental ferroresonance studies. A simple single-phase model is used to represent the case of ferroresonance between a transformer and a capacitor. Comparisons are made between the analytical methods and corresponding experimental results. Simulation results show that estimation of the core losses with enough accuracy determines the second bifurcation point, whatever the core loss model is. Copyright © 2010 John Wiley & Sons, Ltd.