Online Detection and Localization of Partial Discharge inside the Power Transformer by using Acoustic Emission Technique

Abstract

In the power system network, power transformer is plays an important role for maintaining the constant system operating voltage throug0ut its long service life. Most of the high voltages transformers are manufacture with different kind of solid insulation (i.e., paper, mica,ceramic insulator, and spacer etc.)towithstand such high voltage stress. Therefore, insulation conditi0n m0nitoring of such transf0rmers are the utm0st imp0rtant routine work for every power engineers to increase its reliability. It is studied that, partial discharge (PD) is one of the causes of insulation failure in high voltage p0wer transformer winding as it is suffers high voltage stress throughout the service period. Therefore, it is very important to early detection of PD inside the transformers for reliable operati0n 0f the high voltage equipment and avoids massive failure in the power system network. In this study, a simulati0n m0del is developed f0r disc type power transformer winding tosimulate the PD activity inside the transformer using the MATLAB Simulink envir0nment. In addition, the PD activity inside a prototype transformer has been observed in the high v0ltage laborat0ry using acoustic emission technique.The location of Partial discharge source can be detected through the four sens0r acoustic emissi0n technique.