基于光纤的布里渊频移特性和输电线路基本方程, 建立了输电线路分布式弧垂与输电线路温度的关系, 通过监测OPGW(光纤复合架空地线)的光纤频移值, 获得了输电线路的温度分布, 进而计算获得了输电线路的分布式弧垂。通过对比现场弧垂勘察和监测值, 得出弧垂监测误差在10%以内。为输电线路的弧垂监测提供了一种安全、方便和有效的监测方法。

On the basis of the Brillouin frequency shift characteristics of optical fibers and the basic equations of power transmission lines, we establish the functions of their distributed sag vs their temperature and obtain their temperature distribution. Then we calculate the obtained distributed sag by monitoring the OPtical fiber composite overhead Ground Wire (OPGW) fiber frequency shift value. By comparing the monitored sag value with the actual sag value collected on-site, we see that the monitoring errors remain lower than 10%. The research results provide a safe, convenient and effective method for the distributed sag monitoring of power transmission lines.