作者:\n\t杨小龙，袁翰青，孙辰军，马超，李静\n

Authors:YANG Xiaolong,YUAN Hanqing,SUN Chenjun,MA Chao,LI Jing摘要:\n\t为实现架空输电线路在线覆冰及舞动监测，提出了一种基于分布式相敏光时域反射计（Φ-OTDR）架空输电线路在线监测方法。文章通过建立了输电线路的数学模型，理论分析得到导线的弧垂、舞动频率等参数计算公式；其次提出了基于Φ-OTDR分析方法，并对其监测原理进行了分析。通过搭建架空线在线监测模型，分别开展架空线舞动试验及覆冰试验，分析得到了架空输电线路的动态应变特性，验证了基于Φ-OTDR的输电线路状态在线监测方案。试验结果表明，在厘米尺度上，弧垂估计误差小于5.8%，在亚毫米尺度上，冰厚估计误差不大于10.84%，可准确描述了输电线路状态，为输电线路故障预警提供了有力支持。\n

Abstract:\n\tIn order to realize on-line icing and galloping monitoring of overhead transmission lines, an on-line monitoring method for overhead transmission lines based on phase-sensitive optical time domain reflectometry (Φ-OTDR) is proposed.In this paper, by establishing mathematical models of transmission line, the calculation formulas of conductor sag, galloping frequency and other parameters are obtained through theoretical analysis.Secondly, by building the overhead line online monitoring model, the overhead line galloping test and the icing test are proposed respectively, and the leakage principle is analyzed.The dynamic acquisition characteristics of overhead transmission lines are analyzed, and the online status monitoring scheme of transmission lines based on Φ-OTDR is verified.The test results show that the estimation error of sag is less than 5.8% on centimeter scale, and the estimation error of ice thickness is no more than 10.84% on sub-millimeter scale, which gives an accurate description of transmission line status and provides strong support for early warning of transmission line failures.\n


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