Investigation of Partial Discharges within Power Oil Transformers by Acoustic Emission

This paper presents the authors’ multi-channel measurement systems designed and built to conduct research on partial discharge phenomena using acoustic emission method. The provide real-time monitoring, recording of signals analysis recorded signals. is carried out in time, frequency, time-frequency discrimination threshold domains. In particular, a descriptor with ADC acronym defined, which ranks according so-called degree advancement. Studies have been out, showing that for single source, when tested parallel, electrical methods, ranking this identical value apparent charge introduced by sources. patented method location identification power oil transformers. results tests transformer at test station, conducted parallel electric method, three selected transformers during ongoing in-situ operation are presented. Based these results, authors make diagnoses condition insulation inspections confirm diagnoses.