Simulation of Magnetizing Inrush Current of Three-Phase Three-Legged Transformers by Direct Measurement of Coils Inductance

Abstract

This paper presents a method for simulating magnetizing inrush current for three-phase three-legged transformers. A method is showed for easy and fast needed transformer parameters obtaining. It is shown that magnetizing inrush current is strongly dependent on transformer core saturation, and a straightforward method is presented for taking into account core saturation. Finally, a real transformer simulation results are presented and compared with those obtained by direct measure of magnetizing inrush current, discussing method suitability.