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고장전류에 의한 초전도 전력케이블의 내부전류 변화 분석
방종현(Jong-Hyun Bang),제향호(Hyangho Je),김재호(Jae-Ho Kim),심기덕(Kideok Sim),조전욱(Jeonwook Cho),윤재영(Jae Young Yoon),장현만(Hyun-Man Jang),이수길(Su-Kil Lee),박민원(Minwon Park),유인근(In-Keun Yu) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
HTS(High Temperature Superconductivity) Power Cable has a different characteristic with conventional distribution line, so installation and operation condition are different. In this paper, internal fault current characteristics of HTS power cable was analyzed. For this, EMTDC model component of HTS power cable was developed. The developed EMTDC model component is applied to distribution line, then authors analyze internal current characteristics of HTS power cable when fault occurred.
초전도 선형가속기 운전을 위한 헬륨분배시스템의 개념설계 및 헬륨 이송관 기본설계
이기웅(Ki Woong Lee),장현만(Hyun Man Jang),최철진(Chul Jin Choi) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.11
The helium distribution system (HDS) of RAON, which is Korean heavy ion accelerator, has been developing by the Rare Isotope Science Project (RISP) since 2011. The HDS consists of a helium distribution box, transfer line, and valve boxes to supply 4.5 K supercritical helium to superconducting cavities reliably and efficiently. The helium transfer line is composed of five service lines which are supercritical helium supply (4.5 K, 3 bar), gas helium return (5~8 K, 1.05 bar), gas helium supply and return (40~55 K) for thermal shield, and sub-atmospheric return (3 K, 0.03 bar) line. Those five service lines are installed inside one vacuum jacket. The dimension of each service lines is determined by the heat load and pressure drop through the service lines. This paper shows the conceptual design of HDS and engineering design of helium transfer line.
초전도 가속관과 극저온 유지모듈 시험을 위한 극저온 시스템 설계
신재희(Jaehee shin),최철진(Chul Jin Choi),장현만(Hyun Man Jang),김희태(Heetae Kim),이기웅(Ki Woong Lee),윤성운(Sungwoon Yoon) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.11
The cryogenic system for the superconducting radio frequency (SRF) test facility is designed to perform the test of superconducting cavities and cryomodules. The important purpose of cryogenic system is to stably provide supercritical helium and liquid helium from liquefier to superconducting cavities and cryomodules. The thermal load of the cryomodules will be measured and performances of the superconducting cavities are evaluated in the cryogenic system. This paper presents components and specifications of the cryogenic system and the overall layout.