| Title |
Analysis of Common Grounding Effect during the Transient State in Underground Transmission and Distribution Systems |
| Authors |
임광식(Lim, Kwang-Sik) ; 이종범(Lee, Jong-Beom) |
| Keywords |
Transient state ; Same tunnel ; Common grounding ; Grounding fault ; Lightning surge |
| Abstract |
This paper describes the effect of transient state in underground transmission and distribution lines installed together in the same tunnel. Two systems installed in the same tunnel are operated by the common grounding. This paper analyzed that how much one of the two kinds of systems influences the other systems during the transient state by EMTP/ATPDraw. Single line-to-ground fault and lightning surge were selected in transient state condition. These cases were simulated variously according to the variation of common grounding magnitude, fault location and lightning surge magnitude. It is evaluated that the analyzed results will be used for establishment and operating materials of common grounding in the same tunnel. |