METHOD FOR DIAGNOSING PARTIAL DISCHARGE USING TECHNIQUE OF OIL IMMERSED TRANSFORMER

摘要

The present invention relates to a partial discharge diagnostic method using an oil-immersed transformer. According to the embodiment of the present invention, the partial discharge diagnostic method using an oil-immersed transformer comprises a signal conversion step, a measured value coincidence step, and a detection signal output step. [Reference numerals] (AA) Start;(BB) No;(CC) Yes;(DD) End;(S10) AE sensor unit, mounted on the external wall of a transformer of a incoming and distributing panel, detects those sound signals ranging from 20kHz to 40kHz within the transformer;(S20) Signal conversion unit converts the sound signals approved by the AE sensor unit into electronic signals;(S30) Size of the electronic signals and pulse count = Pre-measured partial discharge measurement values ?;(S40) Detection and analysis unit determines that partial discharge has occurred in the incoming transformer inside the incoming and distributing panel and outputs a partial discharge detection signal