高压直流海缆工程应用现状及展望

In recent years, great efforts have been made to develop regional grids interconnection and offshore wind energy in the world, and HVDC cable project is the main channel to realize sea crossing transmission. Therefore, it is necessary to make a comprehensive study on the development process, application status and development trend of HVDC cable. Firstly, the development processes of such two kinds of HVDC submarine cable as wrapped and extruded insulation are reviewed, and the technical characteristics, application occasions and development trend of the two kinds of submarine cables are compared. Then, the application status of the main HVDC submarine cable projects at home and abroad are introduced, and the key indicators such as voltage level, transmission capacity and transmission distance of the typical HVDC submarine cable projects at home and abroad are compared and studied. The development trend and future planning of HVDC submarine cable engineering are prospected, and the main technical challenges, including the electrical and thermodynamic properties of submarine cable insulation materials, submarine cable structure design, accessories reliability and fault location technology, are analyzed.This research will help to solve the key problems in interconnection of regional power grid and offshore energy development.