Transient fault Detection and Analysis of Distribution Transformers using Transform based Techniques

Abstract

Efficient fault detection of distribution transformers has great worth when installation of distribution transformers in the field is taken into account. Computer software has been developed which makes it possible to detect the region of fault location and evaluate the strength of insulation puncturing. It has the capability of locating the position of fault along with total percentage of insulation breakdown region. Different evaluation tests are performed which are capable to recognize not only the visible faults but also those faults in the windings of distribution transformers which are Incipient. Such kinds of faults in transformers generally pass the impulse test but when the transformers installed into the field they are subjected to cause the insulation failure of their windings. Evaluation techniques of the research project remarkably cop up with such kind of insulation breakdowns and present a good quality approach of evaluation for the undesired dominant frequencies. With the help of this research a new method of impulse testing can be introduced in the field of high voltage testing. The scope of this research project is to facilitate the transformer designers and manufacturers to improve their designing techniques of insulations which is not yet introduced. Furthermore it also evaluates the incipient and solid faults in transformers that are not visible by inspection.