高海拔交流特高压线路基于电晕条件下的导线选型研究

摘要:

导线选型研究是特高压交流输电工程的关键技术之一。尤其在高海拔地区，由于空气相对密度大大降低，导 线选型研究对线路的可靠运行、环境保护和控制工程投资至关重要。根据 1 000 kV 特高压交流输电线路电磁环境的 限值，采用经过实际工程验证且广泛使用的计算分析方法，研究了 1 000 kV 特高压交流输电线路采用多种分裂组合 导线时其电场强度比值、可听噪声的海拔限值，同时结合导线年费用计算推荐相应海拔区段内的导线选型。经研究， 在海拔 1 500 ～ 2 000 m 时，推荐采用 8 × JL/G2A － 720 /50 导线; 在海拔 2 000 ～ 3 000 m 时，推荐采用 10 × JL/G1A － 630 /45 导线。

Abstract:

The research of conductor selection is one of the key technologies in UHV AC transmission project． Especially in high altitude area，because the relative density of air is greatly reduced，the research of conductor selection is vital to the reliable operation of transmission line，the environmental protection and project investment． According to the limit value of electromagnetic environment in 1 000 kV UHV AC transmission line，the altitude limit of the electric field intensity ratio and audible noise is studied when multiple split composite conductors are applied to 1 000 kV UHV AC transmission line． At the same time，combined with the annual cost of conductors，the conductor selection related to the corresponding elevation is recommended． After the research，at the altitude of 1 500 ～ 2 000 m，it is recommended to use 8 × JL/G2A － 720 /50 conductor，and at the altitude of 2 000 ～ 3 000 m，it is recommended to use 10 × JL/G1A － 630 /45 conductor．