导致逆变器换相失败的因素分析.PDFVIP

第1 卷第2 期/Vol. 1 No. 2 南方电网技术研究 特约专稿/ pp. 1-11 2005 年3 月/Mar. 2005 CHINA SOUTHERN POWER GRID TECHNOLOGY RESEARCH Featured Article 文章编号：0014-0014(2005)02-0006-06 中图分类号：TM722，TM723 文献标识码：A * 远距离大容量特高压输电方案的分析与比较 Lars Weimers （ABB 电力技术/HVDC ，瑞典） Discussion about and comparison of HVDC/UHVAC transmissions with a bulk capacity over long distance Lars Weimers （ABB Power Technologies/HVDC ，Sweden） Abstract: In order to fulfill the “Power from West to 果表明超高压直流具有明显的优势。采用高压直流 East” program it is clear that a system with a bulk 连接的互联交流电网，只要交流电网足够强，整个 capacity over long distance has to be implemented in 系统就会较为稳定。HVDC 能节省投资，例如对于 China. Three transmission alternatives: 600 kV DC, 一个10 GW、2 000 km 的输电系统进行经济性研究， 750 kV DC and 1 000 kV AC for a 10 GW of power 结果是750 kV 直流的总投资为1 000 kV 交流总投 and 2 000 km of distance are discussed and compared 资的75% ，前者比后者可节省投资大约8.50 亿美元。 from a technical, economic and environmentally point of view. It is concluded that HVDC is much better 关键词：超高压直流输电；特高压交流输电；大功 than UHVAC. Interconnection of AC grids with 率输电；600 kV DC；750 kV DC；1 000 kV AC HVDC is always stable as long as the AC grids are strong. HVDC has an economic advantage. An overall 大功率输电的市场前景非常好，从20 世纪 90 economical comparison between HVDC and UHVAC 年代开始新的项目稳定地增长，而中国占有50%的 shows that for a 10 GW, 2 000 km transmission 全球市场。因为中国新建的水电站多数位于远离负 system, the total cost for 750 kV DC is 75 % of the 荷中心的地方，对经济的、高效的和对环境友好的 total cost for 1 000 kV AC, i.e. the former alternative 输电系统的要求不断增长。 cost