Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 1987.11a
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- Pages.463-468
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- 1987
High Impedance Fault Detection on 22.9kV Multigrounded Distribution System
22.9kV 이중접지 배전선로 고저항 지락 검출
- Park, Young-Moon (Seoul National University) ;
- Lee, Ki-Won (Seoul National University) ;
- Lim, Ju-Il (KEPCO Research Center) ;
- Yoon, Man-Chul (KEPCO Research Center) ;
- Yoo, Myeong-Ho (KEPCO Research Center)
- Published : 1987.11.20
Abstract
In this paper, a high impedance fault detection on 22.9kV multigrounded distribution system that has been very difficult by any existing conventional protective relaying systems is studied. Because the fault current is very low, it cannot be distinguished from neutral current caused by load unvalanced on multigrounded distribution system. We developed the new and best algorithms of high impedance ground fault detection. This algorithms are 'the even order power method, even order ratio method', 'and even order ratio varience method'. Using this algorithms, a detection device for high impedance faults is constructed and tested in the laboratory. And continually, it is installed and has been tested in KEPCO substations.
Keywords