两条特高压直流输电线路并行布置方案研究

Study on the Layout Scheme for Two UHV DC Paralleling Transmission Lines

特高压线路线路极间间距大、线路廊道宽,同一走廊内两条平行更是对沿线的城市规划、障碍物拆迁、工农业生产影响巨大。由于输电线路走廊资源的紧缺,通过研究±800 kV线路2回特高压直流线路并行,研究如何在满足电磁环境和电气距离的前提下,对走廊规划、塔型选择、塔位布置、并行间距、对地距离及拆迁范围等内容进行研究。同时考虑施工安全距离,减少走廊宽度与拆迁,降低工程投资,并得出结论。

UHV transmission lines,especially those lines with long distance between two ends and wide paralleling space between lines in the same corridor,have a great impact on urban planning,obstacle removal,industrial and agricultural production along the lines.Due to the shortage of corridor resources for transmission lines,this paper focuses on ±800 kV UHV DC parallel transmission lines in terms of corridor planning,tower type selection,tower layout,lines paralleling space,ground clearance and demolition scope.Considering electromagnetic environment,appropriate electrical distance,and the safety distance for construction,ways to narrow the corridor width and reduce construction investment are concluded.