- Volume 29 Issue 7
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Analysis of Partial Discharge Characteristics in SF6 Gas Insulation
SF6 가스절연에서 부분방전의 특성분석
Kim, Sun-Jae;Wang, Guoming;Park, Seo-Jun;Kil, Gyung-Suk;An, Chang-Hwan
- Received : 2016.05.13
- Accepted : 2016.06.13
- Published : 2016.07.01
This paper deals with the characteristics of partial discharge (PD) for the purpose of a condition based maintenance (CBM) of gas insulated switchgears (GIS) in power equipment. Four types of electrode systems such as a protrusion on enclosure (POE), a particle on spacer (POS), a free particle (FP) and a Floating were designed and fabricated. PD pulses were measured using UHF sensor with a frequency range of 300 MHz~1.4 GHz and a DAQ with a sampling rate of 250 MS/s. Discharge inception voltage (DIV), discharge extinction voltage (DEV), and phase resolved partial discharge (PRPD) were analyzed depending on electrode systems. The average DIV in the POS was 28.8 kV. It was about 1.7 times higher than that in the FP, which was the lowest value of 17.2 kV. The FP shuffled and jumped at the applied voltage of 23.5 kV. Over 95% of PD pulses in the POE were generated in the negative polarity (
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