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김지환(J.H. Kim),서성원(S.W. Suh),허회덕(H.D. Heo),고의곤(E.G. Ko),김광수(K.S. Kim),권영국(Y.G. Kwon) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.11
90년대 후반부터의 초고압 XLPE 케이블 시스템의 연구개발 및 납품 성과에 힘입어 국내 업계 최초로 2006년 미국시에 345㎸ 광복합 XLPE 케이블 시스템을 수주하였다. 본 논문은 미국 뉴욕주 최대 전력시스템 운용 회사인 KeySpan사가 발주하여 LS전선이 Turn-Key 방식으로 수주, 뉴욕주 롱아일랜드에 성공적으로 준공하여 운전 중인 345㎸ XLPE 광복합 케이블 시스템 project에 대하여 기술하고 있다.
하체웅(C. W. Ha),한성흠(S. H. Han),허회덕(H. D. Heo),이인호(I. H. Lee) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
The sheath of a single-conductor cable for ac service acts as a secondary of a transformer, the current in the conductor induces a voltage in the sheath. When the sheaths of single-conductor cables are bonded to each other, as is common practice for multi-conductor cables, the induced voltage causes current to flow in the completed circuit. This current causes losses in the sheath. Various methods of bonding may be used for the purpose of minimizing sheath losses. In korea, sheath cross bonding system was employed for the prevention of sheath losses, the sheaths were subjected to ac voltages, and the bonding was designed to keep the magnitude of the induced voltages within small limits so as to prevent the possibility of sheath corrosion. But, sheath cross bonding system without transposition of cable can not achieve an exact balance of induced sheath voltages unless the cables are lain in trefoil. This paper describes a transposition system with sheath cross bonding using EMTP(Electromagnetic Transient Program). The transposition system with cross bonding can be extended to longer cable circuits for laid in flat as wall as trefoil by the methods described in this paper.