格尔木—拉萨±400kV直流线路鼠笼式V型跳线安装工艺

Installation of Squirrel-Cage Type V-Jumpers for the ±400 kV DC Golmud Lhasa Transmission Line

格尔木—拉萨±400 kV直流线路工程采用鼠笼式V型跳线,与交流线路鼠笼式Ⅰ型跳线安装有所区别。通过耐张金具串长、转角度数、横担长度、跳线钢管与导线挂线点相对位置等参数,计算V型鼠笼跳线四分裂导线中2根上子线引流板角度,归纳比较了鼠笼式V型跳线安装不同工艺方案的优缺点,为同类工程提供借鉴,并提出了鼠笼跳线设计和安装改进建议。

The ± 400 kV DC Golmud-Lhasa transmission line uses squirrel-cage V-jumpers which are different from the Type I squirrel-cage jumper for the AC transmission line. Using parameters such as length of the tension fitting string, angle of the string, length of the cross arm and relative positions of the jumper tubular pipe to the conductor-banging position, this paper calculates the angles of the drainage board for the two upper sub-conductors of the 4-split conductor in the squirrel- cage V-jumper, and summarizes and compares the advantages and disadvantages of the different processes of the V-jumper installation. It provides some useful reference for similar projects and also some recommendations for the design and installation of the squirrel-cage jumper.