Experimental Investigation on Model Transformer Windings to Analyze Axial and Radial Displacements

Sweep Frequency Response Analysis (SFRA) method is an effi cient method for predicting the geometric changes, and research on the optimum and unambiguous application is still in progress. In order to correlate integrity of transformer windings with changes in the frequency responses, a lot of measurements have to be performed and analyzed. The present work discusses special experimental investigations carried out on model transformer winding to study the various aspects of axial and radial winding displacements using SFRA test. The experimental results for axial and radial winding displacements are presented and analyzed. The analysis will help in understanding the health of an actual transformer and diagnosing it for any impending fault with respect to winding movements.