全球能源互联网（英文）2020，Vol.3Issue(2)：120-127,8.DOI:10.14171/j.2096-5117.gei.2020.02.003
面向全球能源互联网的高压直流海缆技术技术经济性需求研究
Technical and economic demands of HVDC submarine cable technology for Global Energy Interconnection
摘要
Abstract
Power transmission across the sea is an important part of global energy interconnection (GEI). To support the construction of GEI and to serve the needs of future clean energy trans-sea transportation and offshore wind power development, this study a) analyzes the requirements of the GEI backbone network pertaining to direct current (DC) submarine cable technology, and b) defines the key technical and economic indices of ultrahigh-voltage direct current (UHVDC) submarine cable based on theoretical computations. The research is based on the thermoelectric coupling model and the finite element method. It is shown that the dielectric strength of the insulating materials of the ±800 kV～±1100 kV/ 4000 MW～12000 MW UHVDC submarine cable (extrusion insulation) should be not less than 43～65 kV/mm, while the heat resistance is not less than 110 ℃. As the cost of submarine cable is 5～10 times higher than that of the overhead line, the project investment need to be decreased to a level within the economical carrying capacity to guarantee extensive applicability of the HVDC submarine cable technology.关键词
高压直流海底电缆/全球能源互联网/技术指标/经济指标Key words
UHVDC submarine cable/GEI/Technical index/Economic index引用本文复制引用
Xiaoling Zhao,Yao Liu,Jiawei Wu,Jinyu Xiao,Jinming Hou,Jinghui Gao,Lisheng Zhong..面向全球能源互联网的高压直流海缆技术技术经济性需求研究[J].全球能源互联网（英文）,2020,3(2):120-127,8.基金项目
This work was supported by the Global Energy Interconnection Group Co., Ltd. Science and Technology Project (Project No.101662224/Title: UHV large-capacity DC submarine cable key technology and roadmap research) and by the National Key R&D Program of China (2016YFB0900702). （Project No.101662224/Title: UHV large-capacity DC submarine cable key technology and roadmap research）
