대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)
- 대한전기학회 2000년도 하계학술대회 논문집 C
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- Pages.1539-1541
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- 2000
초고압 전력케이블 절연체의 Flow Pattern에 따른 절연성능 고찰
Dielectric Strength According to Flow Pattern in EHV Power Cable Insulation
- 이승엽 (LG전선(주) 전력연구소) ;
- 김영호 (LG전선(주) 전력연구소) ;
- 이상진 (LG전선(주) 전력연구소) ;
- 김동욱 (LG전선(주) 전력연구소) ;
- 최명규 (LG전선(주) 전력연구소)
- LEE, Seung-Yop (LG Cable Ltd.) ;
- KIM, Young-Ho (LG Cable Ltd.) ;
- LEE, Sang-Jin (LG Cable Ltd.) ;
- KIM, Dong-Wook (LG Cable Ltd.) ;
- CHOI, Myung-Kyu (LG Cable Ltd.)
- 발행 : 2000.07.17
초록
Insulation layers in XLPE power cables may have some patterns generated in the manufacturing process. They are called 'flow patterns' and show flow history of molten polyethylene between inner and outer semiconducting layers. Flow patterns are even seen with naked human eyes and suspected to be inhomogeniety of insulation, weakening insulation performance. Investigated in this paper is electrical treeing resistance and ac breakdown strength according to flow patterns. Experiments of electrical treeing and ac breakdown strength by means of ramp tests were conducted using newly developed electrode system with point-to-plane structure and sphere-to-sphere structure, respectively. All results were analyzed with the application of statistics, showing little differences.
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