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.

fiber optic sensing  /  Brillouin optical time domain reflectometry  /  strain  /  real-time monitoring  /  optical fiber composite overhead ground wire