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고속철도차량의 이상전압 저감을 위한 절연협조에 관한 연구
최종록(Jong-Rok Choi),권호준(Ho-Jun Kwon),김상현(Sang-Hyeon Kim),김재문(Jae-Moon Kim) 대한전기학회 2019 전기학회논문지 Vol.68 No.8
Frequent input and interception of the main circuit breaker(MCB) has caused various abnormal voltages in the main transformer and power conversion system of a Korean high-speed train called KTX-Sancheon. Although there are some precedencies about surge arresters, related to the relationship between incorporating insulation to surge arresters and the electric power quality of the industrial lines within systems of the electric railway, and the efficient power supply system configuration of the railroad dispatching divisions, there are no previous research on insulation cooperation to the EMU. Therefore, in this paper, the mutual insulation cooperative relationship is studied as a method of eliminating the transient phenomena of the abnormal voltage generated in the feed and receiving parts of railway vehicles by investigating of the operation characteristics of surge arresters and spark gap(SG) applied to Korean high-speed railway vehicles (KTX-Sancheon).
김완일(Wan-il Kim),이계승(Kye-Seung Lee),최종록(Jong-Rok Choi),김재문(Jae-Moon Kim) 대한전기학회 2017 전기학회논문지 Vol.66 No.12
8200 Series Electric Locomotives are mostly imported from overseas due to aging and uncertainty of source technology, and it’s the maintenance cost is increasing. We are analyzed life cycle costs based on international standards such as IEC 60300-3-3 and IEC62278. The main conversion system of the 8200 series electric locomotive is closely related to vehicle operation and is one of the subsystems requiring frequent maintenance. In this paper, the life cycle cost of the main conversion unit in 8200 series electric locomotive is analyzed based on the maintenance manual. As a result of analysis, maintenance cost of GTO module and control device is relatively high, and it is confirmed that the cost increases according to the useful life.