Design aspects on HVDC cable joints

Today's power utilities are evolving towards a more environment-friendly form. Particularly, in undersea power transmission, offshore renewable energy integration and urban power transmission, HVDC cable systems play a significant role. As an essential part of the cable systems, cable joints are often the weakest and the most critical point. Hence, the safe operation of cable joints under different operational stages is one of the key issues to make the cable systems reliable. In this paper, the development of HVDC cable joints has been reviewed. The design aspects, including geometry, insulation materials and interfaces are briefly discussed.