POWER CABLE

The present invention relates to a power cable, particularly, an ultra-high voltage underground or submarine cable for long-distance direct current transmission. Specifically, the present invention relates to a power cable in which an insulating layer has high dielectric strength, and an electric field applied from the insulating layer to a metal sheath is uniformly and effectively relieved and, particularly, a return circuit of a fault current is effectively ensured when a grounding or short-circuit accident of the cable occurs, thereby enabling safety to be promoted, insulating oil is impregnated well during manufacturing process, and problems such as damage of metalized paper are removed during cable manufacturing. La présente invention concerne un câble d'alimentation, et plus particulièrement, un câble sous-marin ou souterrain ultra-haute tension destiné à une transmission longue distance de courant continu. Plus précisément, la présente invention concerne un câble d'alimentation comprenant une couche isolante présentant une résistance diélectrique élevée, un champ électrique appliqué à partir de la couche isolante vers une gaine métallique étant uniformément et efficacement atténué, et, plus particulièrement, un circuit de retour d'un courant de défaut étant efficacement assuré lorsqu'un accident de mise à la terre ou de court-circuit du câble survient, ce qui permet de favoriser la sécurité, l'huile isolante étant bien imprégnée pendant le processus de fabrication, et des problèmes tels qu'un endommagement du papier métallisé étant éliminés pendant la fabrication du câble. 본 발명은 전력 케이블, 특히 장거리 직류송전용 초고압 지중 또는 해저 케이블에 관한 것이다. 구체적으로, 본 발명은 절연층의 자체적인 절연내력이 높고, 상기 절연층에서 상기 금속시스까지 인가되는 전계가 균일하게 효과적으로 완화되며, 특히 케이블의 지락 또는 단락 사고 발생시 고장전류의 귀로가 효과적으로 확보되어 안전을 도모할 수 있고, 제조공정에서 절연유 함침이 잘되면서도 케이블 제조시 금속화지의 파손 등의 문제가 없는 전력 케이블에 관한 것이다.