A Lightning Surge Analysis of Testing Line for Protection of Underground Distribution Systems

지중배전계통 보호를 위한 모의시험선로 서지특성 해석

  • 김병숙 (원광대 대학원 전기공학과) ;
  • 이장근 (원광대 전기전자및정보공학부) ;
  • 이종범 (한전 전력연구원 배전연구소) ;
  • 한병성 (전북대 전자정보공학부)
  • Published : 2006.08.01

Abstract

This paper describes the overvoltage obtained by surge behavior analysis in testing underground distribution systems. Model systems consist of overhead distribution line and underground cable. Such model system considered various characteristics of actual distribution systems will be soon constructed at testing yard. Simulation is carried out under various states such as cable kinds, cable length, lightning wave and time, and branch circuits. Model is established by EMTP/ATPDraw. Line Constants are calculated by ATP_LCC. When the direct lightning surge strikes on conductor of overhead line, the overvoltage is calculated using EMTP/ATPDraw in many cases. Simulation results will be compared with real testing results at testing yard in the near future. The compared results will be used to establish protection methods in actual underground distribution systems.

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