导线选择是大跨越输电工程设计的重要环节。介绍了对特强钢芯高强耐热铝合金绞线的特点及其在大跨越输电工程中的应用情况，以广东省某新建大跨越输电工程为例，对各种导线型式进行了经济、技术比较。比较结果表明，采用特强钢芯高强耐热铝合金绞线能够有效减小杆塔风荷载，降低工程造价。

Conductor selection is an important link in designing large-crossing transmission project. In this paper, the characteristics of KTACSR/EST conductor and its application in large-crossing transmission projects are introduced. Taking a new-built large-crossing transmission project in Guangdong province as an example, the technical and economic comparison of different kinds of conductors are carried out. It is shown that the KTACSR/EST conductor can reduce the wind load of the tower and the investment of project effectively.