为保证电力系统通信的安全运行，实时监测OPGW(光纤复合架空地线)的运行状态，提出了基于BOTDR(布里渊光时域反射)技术对OPGW线路温度和应变实时监测的方法。采用加温加压的方法，对OPGW纤芯G.652光纤的温度和应变系数进行了标定，基于实验结论，对现场运行的OPGW线路温度和应变的分布进行了研究。同时采用差值法和相对值法分别对温度和应变引起的故障进行了分析，分析结果表明，该系统能实现OPGW分布式温度和应变的实时测量和故障点定位。

For ensuring the secure operation of power system communications, real-time monitoring of the running state of the OPtical fiber composite overhead Ground Wire (OPGW) is necessary. This paper presents a method on the basis of the Brillouin Optical Time Domain Reflectometry (BOTDR) technology, in which real-time monitoring is performed on the OPGW temperature and strain. Then, it calibrates the temperature and strain coefficients of G.652 optical fiber in OPGW. On the basis of the experimental results, it studies the temperature and strain distribution of OPGW in field operation and analyzes the faults brought about by temperature and strain using the differential method and the relative value method. The results indicate that the BOTDR-based online monitoring system can realize real-time measurement of distributed temperature and strain and fault location for OPGW.