Li Yongqian, Zhai Lina, Zhao Lijuan, et al. Study on BOTDR technology-based OPGW on-line monitoring[J]. 2013,(5):30-33. DOI: 10.13756/j.gtxyj.2013.05.003.
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.652optical 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.