高压直流海缆工程应用现状及展望

Application Status and Prospect of HVDC Submarine Cable Projects

近年来国际上大力发展电网区域互联和海上风能,而高压直流海缆工程是实现跨海输电的主要通道,因此对高压直流海缆的发展历程、应用现状和发展趋势进行综述性研究非常必要。首先回顾了绕包型绝缘和挤包型绝缘两种高压直流海缆的发展历程,对比了两种海缆的技术特点、应用场合及发展趋势;然后介绍了国内外主要高压直流海缆工程的应用现状,对当前国内外典型直流海缆工程的电压等级、输送容量和输电距离等关键指标进行了对比研究;展望了高压直流海缆工程的发展趋势和未来规划,分析了其面临的主要技术挑战,包括海缆绝缘材料的电气性能和热力学性能、海缆结构设计、附件可靠性和故障定位技术等。该研究将有助于解决电网区域互联和海上能源开发中的关键问题。

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.