±500kV直流线路极导线不同排列方式对电磁环境的影响

Research on electromagnetic environmental impact under the polar conductors in different arrangement on ±500kV DC transmission lines

目前我国常规的±500 kV直流线路均按极导线水平排列设计,但对于华东这种线路走廊比较拥挤的地区,若采用极导线水平排列,将占用较宽的线路走廊,由此造成的民房拆迁费用会大大增加。结合三峡蔡家冲—白鹤±500 kV直流输电线路(三沪直流线路),提出极导线垂直排列的直流线路架设思想,并通过模拟试验和现场实测的电磁环境数据,比较极导线水平排列和垂直排列情况下线路的电磁环境水平。研究结果表明:在相同的导线高度下,极导线垂直排列与水平排列相比,电磁环境较优,环保线路走廊也小。从电磁环境角度考虑,直流线路架设可采用极导线垂直排列方式。

Adopting horizontal arrangement in polar conductors is a routine design method in ±500 kV DC transmission lines. The power transmission line corridor is very narrow in East China for San-Hu DC transmission line, the cost of residential house clearing is expensive as the polar conductors horizontally arranged. The idea of the polar conductors with vertical arrangement was presented to the feature of San-Hu DC transmission line, and the electromagnetic environment level of polar conductors with vertical and horizontal arrangement was compared through model experiment and spot measurement. The research results show that electromagnetic environmental level under polar conductors in vertical arrangement is more excellent than polar conductors in horizontal arrangement, line corridor of vertically arranged polar conductors is more narrow too. Adopting vertical arrangement in polar conductors in jam line corridor area is feasible.