Publisher : The Korean Institute of Electrical and Electronic Material Engineers
DOI : 10.4313/TEEM.2015.16.6.323
Title & Authors
Comparison of Partial Discharge Characteristics in SF6 Gas Under AC and DC Jo, Hyang-Eun; Wang, Guoming; Kim, Sun-Jae; Kil, Gyung-Suk;
In this paper, parameters related with partial discharge (PD) were analyzed in SF6 gas under AC and DC voltages. Three electrode systems (protrusion on conductor, protrusion on enclosure, and free particle) were fabricated to simulate PD defects in a gas-insulated switchgear (GIS). All electrode systems were filled with SF6 gas at 0.5 MPa. PD pulses were detected using an oscilloscope and a data acquisition (DAQ) based on IEC 60270. To analyze the PD characteristics under AC and DC voltages, parameters such as discharge inception voltage (DIV), discharge extinction voltage (DEV), pulse magnitude, repetition rate, and T-F map were compared. From the experimental results, PD was revealed to have different characteristics under AC and DC, and these results may be useful for diagnosis of power facilities operated under HVDC.
Partial discharge;AC and DC;IEC 60270;Repetition rate;T-F map;