Power cable
The present invention relates to a power cable, and more particularly, to an ultra-high voltage underground or submarine cable for long distance direct current transmission. The power cable according to the present invention has an insulation layer with high insulation strength, effectively controls...
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Format: | Patent |
Sprache: | eng ; kor |
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Zusammenfassung: | The present invention relates to a power cable, and more particularly, to an ultra-high voltage underground or submarine cable for long distance direct current transmission. The power cable according to the present invention has an insulation layer with high insulation strength, effectively controls an electric field applied to the insulation layer, and effectively prevents partial discharge and insulation breakdown due to an electric field concentrated on a gap by suppressing occurrence of a large void in the insulation layer when installing the insulation layer under a low temperature environment and leaving the insulation layer at a low temperature for a long time until an electric current is applied. The power cable comprises: a conductor; an internal semiconductive layer; an insulation layer; an external semiconductive layer; a metal sheath layer; and a cable protection layer.
본 발명은 전력 케이블, 특히 장거리 직류송전용 초고압 지중 또는 해저 케이블에 관한 것이다. 구체적으로, 본 발명은 절연층의 자체적인 절연내력이 높고, 상기 절연층에 인가되는 전계가 효과적으로 완화되며, 특히 저온 환경하에 포설 후 통전시까지 장기간 동안 저온에서 방치시 절연층에 거대 공극(large void)이 발생하는 것을 억제하여 상기 공극에 집중된 전계에 의한 부분방전, 절연파괴 등을 효과적으로 방지할 수 있는 전력 케이블에 관한 것이다. |
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