대한전기학회논문지:전력기술부문A (The Transactions of the Korean Institute of Electrical Engineers A)

대한전기학회 (The Korean Institute of Electrical Engineers)
권호 표지

도심지 변전소 지락사고시 인근 저항성간섭 영향 해석

Analysis of Conductive Interference Around Substation Exclusively Fed by Cables Under Ground Fault Condition

  • 최종기 (한국전력공사 전력연구원) ;
  • 이동일 (한국전력공사 전력연구단 송전기술그룹) ;
  • 김재준 (한국전력공사 송변전건설처 건설기술팀) ;
  • 유연표 (한국전력공사 전자통신처 전력유도팀) ;
  • 정창수 (한국전력공사 전자통신처 전력유도팀) ;
  • 김경철 (홍익대학교 전기공학과)
  • 발행 : 2005.12.01
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초록

Recently, substations have been constructed in GIS (Gas Insulated Switchgear) and indoor type because of the increasing difficulties of securing locations. In case of urban substations, it is also common that the substations are exclusively fed by underground cables. Sometimes, the infrastructures in urban area, such as communication facilities, are located near substations to be constructed. In this paper, we examined such a case that a branch office building of KT(Korea Telecom) was located near 154 kV underground GIS substation under construction with about 100 meters of the lateral distance between two facilities. GPR (Ground Potential Rise) at the substation and the transferred earth potential at the KT building through the earth in SLG (Single-Line-to- Ground) fault condition were investigated based on a series of computer simulations. The calculated earth potential at a distance of 100 m from the substation was below 120 V which satisfying the limit value of 650 V.

키워드

참고문헌

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