长区段大截面导线山区放线施工技术

±500 kV宝鸡换流站-德阳换流站直流线路川陕交界段地处山区，由于地形复杂、交通不便、牵张场选择困难，该段线路放线施工必须采取长区段放线方式。针对该段线路放线施工中遇到的问题，对牵张场选择、放线方案选择与放线措施等长区段大截面导线山区放线施工技术的关键内容进行了总结，可为相关线路放线工程施工提供参考。

Large-span Stringing Technology of Large Cross-section Conductors in Mountainous Areas

The ±500 kV EHVDC Transmission Line project from Baoji in Shanxi province to Deyang in Sichuan province passes through the mountainous area in the boundary section between two provinces where the terrain is very complex and transportation condition is very poor.It is very difficult to find a place for conductor stringing in this area and large-span stringing technology had to be used for string construction.Based on the problems encountered in the process of stringing construction in this area,a summary is made in this paper of the key technologies for large-span stringing construction of large cross-section conductors in mountainous areas,including the site selection for wire traction,selection of stringing schemes,and stringing measures,which can be used as a reference for stringing construction in similar areas.