| Title |
Signal Characteristics of Ultra-high Frequency Radiation from Partial Discharge in Insulation Oil |
| Authors |
주형준(Ju, Hyoung-Jun) ; 구선근(Goo, Sun-Geun) ; 박기준(Park, Ki-Jun) ; 한기선(Han, Ki-Seun) ; 윤진열(Yoon, Jin-Yul) |
| Keywords |
Partial Discharge ; Insulation Oil ; UHF PD signal ; PD detection |
| Abstract |
We have designed 4 types(void in insulation paper, protrusion electrode, floating electrode, surface discharge) of partial discharge(PD) defect to simulate typical faults found in oil filled power transformers. Ultra-high frequency(UHF) radiation due to PD was measured using a UHF measuring system and a conventional PD measuring system, simultaneously. Electromagnetic radiation spectra of these defects show UHF radiation up to about 1.5-2 GHz range. The phase resolved partial discharge(PRPD) patterns of UHF radiation from the PD defects were also measured and the pattern reveals distinct feature for each defect types. The UHF measuring could be used to detect PDs in oil filled transformers and analysis of the PRPD pattern should provide useful information on origin of PD signal. |