Simulative experiment of major and minor inter-turn short circuit faults in power transformer windings

Abstract

Frequency Response Analysis is offline technique to detect the winding deformations. This paper intends to analyze the power transformer under major and minor inter-turn short circuit faults in the winding of transformer using simulative study. An EMTP-RV based lumped circuit model was given based on the number of sections and turns of winding to simulate the faults at different levels by short circuiting windings of adjacent turns with modified circuit parameter for each fault level and simulated results have represented as neutral current in time-domain and corresponding frequency responses with and without fault levels were plotted for major and minor inter-turn faults.