特高压输电技术在南方电网的发展与应用

Development of Ultra-high Voltage Transmission Technology in China Southern Power Grid

针对南方五省资源分布、经济发展和电力需求水平决定的南方电网西电东送战略,论述了因其距离远、容量大及输电走廊、受端短路电流等经济和技术要求而采用特高压输电技术的必要性并介绍了南方电网2030年前建设7至8回特高压交直流输电线路的规划,其中云南至广东±800 KV直流输电工程将成为中国乃至世界第1个特高压直流输电工程。该工程已开始实施,一些关键技术已基本解决,计划2009年投入商业运行。

Due to the feathers of economy development, energy demand as well as resource distribution in southern five provinces of China, large power capacity has to be transmitted from the west to the east. The distance could he more than 2 000 kilometer. Ultra-high voltage transmission technology is an applicative solution of this problem. It is planned that 7 to 8 ultra-high voltage AC or DC transmission line will be constructed before 2030. As some key engineering problems are solved, one 800 ultra-high voltage DC transmission system from Yunnan to Guangdong is constructing which will be the first ultra-high voltage DC project in China or even in the world. This system is planned to he put into commercial operation in 2009.