向家坝换流站共用接地极研究  

Research on the Common Ground Electrode of Xiangjiaba Converter Station

作　　者：黎亮[1] 蔡上 聂国一 

机构地区：[1]西南交通大学,成都市610031 [2]西南电力设计院,成都市610021

出　　处：《电力建设》2007年第6期17-19,共3页Electric Power Construction

摘　　要：通过对多回直流共用接地极的前期研究,结合向家坝—上海±800kV特高压直流输电工程,向家坝送端将陆续建成3个换流站的实际情况,对于建设共用接地极的方案、建设方式进行多方面的分析论证。考虑共用接地极的共用方案、建设共用接地极的先后顺序,提出共用接地极可以减少工程投资和接地极选址的难度,减轻对环境的影响。建议采用2个换流站共用一个接地极、另一个换流站建设独立接地极的“2+1”共用接地极方式,并同时论证了今后将2个接地极连接组成联合接地极和3站共用接地极的可能性。Based on pre-studies of common ground electrode in multi-circuit DC lines, and combined with the fact that three converter stations will be built in Xiangjiaba side in the Xiangjiaba-Shanghai ＋800kV UHVDC power transmission project, extensive analyses and argumentations in the schemes and construction methods of common ground electrode have been conducted. Considering the scheme and order of common ground electrode construction, the authors suggest that common ground electrode can reduce engineering investment, minimize difficulties in ground electrode site selection, and alleviate environmental impact. And a ＂2＋1＂ common ground electrode scheme that two out of the three converter stations share one ground electrode, while the third one has independent ground electrode is proposed. In the mean time, the feasibility of forming combined ground electrode by connecting two ground electrodes, and sharing grounding electrode among three stations are also discussed.

关 键 词：高压直流输电 接地 向家坝换流站 共用接地极 

分 类 号：TM732[电气工程—电力系统及自动化]