特高压直流输电的技术特点和工程应用

 摘要：随着我国国民经济和电力工业的快速发展，对电网建设提出了新的要求。特高压直流输电技术具有送电距离远，送电容量大，控制灵活和调度方便等特点，是电网发展的关键技术之一。世界上至今还没有特高压直流输电（±800 kV）的实际运行项目，但研究分析表明，±800 kV特高压直流输电的工程应用不存在不能克服的技术问题，特高压直流输电技术具有广阔的应用前景。高电压端（±800 kV）的换流变压器、套管，外绝缘和环境影响是研究开发的重点。

　　关键词：特高压；直流输电；电网；工程；研究；应用

 

Technical characteristics and engineering applications of
UHVDC power transmission

LI Li-cheng

　　Abstract: With the rapid development of national economy and electric power industry in　China, new requirements are put forward for the construction of power grid, and because of its advantages of long distance power transmission and large transmission capacity as well as flexible control and convenient dispatching, UHVDC power transmission technology is one of the key technologies for the development of power grid. Although to date,there is no UHVDC (800 kV) power transmission project operating in the world, relevant research and analysis indicate that no unconquerable technical problem is expected for a project of the kind, and there is extensive foreground for UHVDC application. The UHVDC R&D focuses mainly on the converter transformer, bushing, external insulation and environment impact at the high voltage side.

　　Keywords: UHV; DC transmission; power grid; engineering; research; application