Discussions on Stringing Technology of 1000 mm~2 Large Cross Section Conductor for ±660 kV DC Transmission Line

Application of large cross-section conductor is of great significance to building the "resource-saving and environment-friendly" grid.The Northwest(Ning East)-North China(Shandong) ± 660 kV transmission line project which uses 4×JL/G3A-1000/45 is economically reasonable and technologically advanced.Considering the structure and stringing technique of the 1000 mm2 large cross section conductor is different from those of the diameter-expanded conductor,this paper focuses on the key construction techniques and construction precautions arranging from the selection of the conductor stringing machine,tension stringing and conductor jointing to installation of attachments.The construction practice has proved that adoption of "One Pulling Four" proposal helps to make the stringing of 1000 mm2 large cross section conductor safer,more efficient and environment-friendly.