Simulation and Analysis of Impulse Faults in Power Transformer

Abstract

The effects of impulse faults of different nature and different locations of occurrence in the high voltage winding of a transformer are investigated in this work. During the investigation, a high frequency transformer model developed in MATLAB Simulink was subjected to different lightning and switching impulse waveforms. Turn-to-earth and turn-to-turn faults were simulated at different locations of the windings due to applied impulse. The transformer response is studied owing to the variation of the input impulse waveforms, fault types and their location along the windings. This study is important in the purview of fault characterization which provides an important basis for developing more reliable and sensitive methods to detect internal faults in the transformer windings.