대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)
- 대한전기학회 2008년도 제39회 하계학술대회
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- Pages.470-471
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- 2008
지중송전 시스템의 병행지선 설치 방안 연구
Methodology of Parallel Ground Conductor Installation on Underground Transmission System
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Hong, Dong-Suk
(Taihan Electric Wire Co.) ;
- Park, Sung-Min (Taihan Electric Wire Co.) ;
- Hahn, Kwayng-Hyun (Taihan Electric Wire Co.)
- 발행 : 2008.07.16
초록
SVL is installed at underground transmission system to protect cables and insulation joint-box from overvoltages caused by lightning, switching, and line-to-ground fault. Domestic underground power system adopts cross bonding type to reduce the induced voltage at sheath, but single-point bonding is required depending the system installation configuration. SVL can be easily broken by overvoltages induced at joint-box because single-point bonding has uneffective system structure to extract fault current. ANSI/IEEE recommends Parallel Ground Continuity Conductor(PGCC) to prevent SVL breakdown. In this paper, EMTP simulation is performed to analyze effects on SVL under PGCC installation when single-line-to-ground fault occurs. The result shows that PGCC and short single-point bonding distance can reduce overvoltages at SVL.
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