According to the strategic plan of "West-to-East Power Transmission, North-South Mutual Supply and National Networking", the construction of long-distance and large-capacity transmission lines is imperative, and it also puts forward higher requirements for overhead transmission lines. On the premise of voltage stability, it is very important to increase the transmission current density, that is, to increase the transmission capacity per unit area of conductors. At present, the conductors used in overhead transmission lines in China are still traditional steel-cored aluminum stranded wire (ACSR). Because of its relatively weak heat resistance, the transmission capacity of the lines is limited to a certain extent.
As a kind of special conductor with good performance, 60% IACS heat-resisting aluminum alloy conductor has its application in urban network expansion and transformation, substation construction, long-span lines and general lines, and has great development and application prospects. At present, the unit price of domestic heat-resistant aluminum alloy conductor is about 1.3 times that of ordinary conductor, because its carrying capacity is 1.4 to 1.6 times that of ordinary conductor, the cost of unit transmission capacity is much lower than ordinary conductor. In addition, the use of 60% IACS heat-resistant aluminum alloy conductor to simplify the structure of the line, reduce the number of fittings and components, the safe operation of the line has great benefits.