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Influence of Partial Discharge Properties due to Void in Cable Joint Parts  

신종열 (삼육의명대학 자동차과)
홍진웅 (광운대학교 전기공학과)
Publication Information
Journal of the Korean Society of Safety / v.18, no.3, 2003 , pp. 69-74 More about this Journal
Abstract
To investigate the partial discharge and electric field distribution in cable joint parts, we measured the partial discharge and electric field in specimen. The specimens which cross-linked polyethylene(XLPE) and ethylene propylene diene ethylene(EPDM) are used to insulating material for underground cable md cable jointing parts. The polymers are used to insulating material in switchgear which is a kind of transformer equipment and in ultra-high voltage cable. Its using is increasing gradually, the electrical insulation properties are not only excellent but also mechanical property is excellent. And because it is possible to be made void of several type in insulator while it is produced, which the electrical field distribution is changed by void, it has a critical influence to insulator performance. The underground cable is connecting by the jointing material, insulating breakdown and the electric ageing which are caused by several mixing impurity and the damage of cable insulator layer, which reduced the life of cable while intermediate joint kit is connected. Therefore, the computer simulation is used to estimating insulator performance, XLPE is used to the insulating material of ultra-high voltage cable and EPDM is used to insulator layer in joint material kit, and which are produced as specimen. And it is analyzed the electric field concentrating distribution and partial discharge by modeling of computer simulation in void and cable joint kit.
Keywords
partial discharge; electric field distribution; cross-linked polyethylene; ethylene propylene diene ethylene; insulating breakdown; cable joint kit;
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