대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)
- 대한전기학회 1993년도 하계학술대회 논문집 A
- /
- Pages.120-123
- /
- 1993
영상어드미턴스에 의한 직접접지 배전방식에서의 역가압 지락사고 검출
Back Fed Earth Fault Detection in Three Wire-Unigrounded Distribution-System By Zero Sequence Admittance
- Yoo, Myeong-Ho (KEPCO Research Center) ;
- Kim, Il-Dong (KEPCO Research Center) ;
- Han, Hong-Seok (PROCOM System) ;
- Pak, Chul-Won (Seong-Kyun-Kwan Univ.)
- 발행 : 1993.07.18
초록
This paper presents the developing a new algorithm for detecting the Back fed Earth Fault in three wire-unigrounded distribution system by zero sequence admittance. So called "Backfed Earth Fault" of the electric power distribution line refers to a class of earth faults that the load-side line only is grounded, following after the distribution line broken into two parts, the source-side and the load-side. Because its mechanism differs from that of other earth faults, it is therefore, required to examine. This paper deals with the detailed software of the digital protective relay for Backfed earth fault. In order to prove that the proposed schemes is good, we performed off-line simulation using data from EMTP and ETSA(Electrcity Trust Of South Austrilia). It is shown that the suggested algorithm is never mal operated.
키워드