中文摘要：

输电线路弧垂是线路安全运行的关键指标之一,弧垂大小的在线监测对实现输电线路智能化运行具有重要意义。研究给出了导线弧垂和导线耐张段轴向张力之间的数学关系模型,研制了基于导线轴向张力测量的导线弧垂在线监测系统。对样机系统现场采集的实际数据进行分析和验证,表明该系统具有较高的测量精度,最大误差小于2%,满足输电线路运行和维护对弧垂监测的要求。

英文摘要：

Conductor sag is a key factor of determining the safe operation of the line.The sag online monitoring is significant for implementing smart transmission line.A sag online monitoring system based on the relationship between conduct sag and axial tension was proposed.The prototype of the developed system was installed on-site and many raw data were collected and verified.The result indicates that the system is accurate in measurement,with a maximum relative error of less than 2%.It can fully meet the requirements of online monitoring for operation and maintenance.