中文摘要：

对气体绝缘传输线（GIL）与传统输电线路的各项技术经济指标进行了比对，简述了GIL的铺设方式；特别论述了GIL中低SF6含量N2／SF6混合气体绝缘方式的采用，以及GIL设计及运行过程中的若干问题的分析和解答；最后综述了国内外GIL的现状．并对GIL的发展作了展望

英文摘要：

This paper compares the technical and economic indicators of the gas-insulated transmission line with the conventional transmission line, briefly reviewed the laying ways of GIL, and focuses on the adoption of NJSF6 gas mixtures with low SF6 content in GIL insulation. Some problems in the process of GIL design and running are analysed and resolved. Finally, it reviews the development status of GIL both at home and abroad, and makes a development prospect of GIL.