가스절연기기 내부의 금속 이물질에 의한 초고속 부분방전량 및 전류 측정

Ultra-fast meseurement of partial discharge current due to conducting particle in Gas-insulated System (GIS)

A special discharge cell containing a free conducting particle was used to generate the discharges in $SF_6$. The analog bandwidth of the measurement system exceeded 5 GHz. The measured signals were processed to compensate for the response of the measurement system. The discharge current rise time was in the range of 70 ps, while its full-width half-maximum was 120 ps. Single and double current pulses of positive and negative polarities were measured. Likewise, these pulses were compared with the measurement obtained using a conventional partial discharge detector of the IEC60270 type