极端天气下光纤复合架空地线（OPGW）电缆状态的在线监测对电力通信系统的安全运行和预警具有重要意义。综述了布里渊光时域反射（BOTDR）技术监测线缆温度和应变的基本原理，分析了其应用到电力灾变检测中的可行性，结合具体应用场景以及在现场运行的BOTDR系统对实际OPGW线缆的监测情况，通过理论和实际案例验证了利用BOTDR技术的测试装置对OPGW线路及周边环境实时监测的方法的可行性，能够有效满足电路线廊环境灾变监测的需求。
The on-line monitoring of optical fiber composite overhead ground cable (OPGW) under extreme weather conditions is of great significance to the safe operation and early warning of power communication system.The basic principle of monitoring cable temperature and strain based on Brillouin optical time-domain reflectometry (BOTDR) technology is reviewed,and the feasibility of its application to power disaster detection is analyzed.Moreover,combined with the specific application scenarios and monitoring situation of operating OPGW cables with BOTDR system in the field,a method for real-time monitoring OPGW lines and surrounding environment using BOTDR technology test device is verified in both theory and practice,which can effectively meet the needs of environmental disaster monitoring of electrical route corridor.
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