| Title |
Analysis of Conductive Interference Around Substation Exclusively Fed by Cables Under Ground Fault Condition |
| Authors |
최종기(Choi Jong-kee) ; 이동일(Lee Dong-il) ; 김재준(Kim Jae-joon) ; 유연표(Yoo Yeon-pyo) ; 정창수(Jung Chang-soo) ; 김경철(Kim Kyung-chul) |
| Abstract |
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. |