Modeling and Transient Analysis of Cable in Combined Transmission Line with HIF and Analysis of Transient Characterstic in CCPU of Uderground Cable

혼합송전선로에서 고저항 지락사고시 케이블 과도현상 해석 및 전력케이블 시스 접지저항에 따른 CCPU 과도특성 모의

This paper discribes the modeling and transient analysis of cable in combined transmission line under high impedance fault(HIF). And also, transient characterstic analyzed on cable covering protection unit(CCPU) is presented. Modeling of the combined transmission line is established in PSCAD/EMTDC V3. The required data to analyze the transient phenomena is given from the actual system. The results show the HIF modeling in cable, fault current according to the value of fault resistance. And also when the value and method of grounding resistance is changed in CCPU, simulation results are presented.