Development of Optical Fiber Sensors Based on Brillouin Scattering and FBG for On-Line Monitoring in Overhead Transmission Lines

Jianbin Luo 1, Yanpeng Hao 1, Qing Ye 2, Yunqi Hao 2, and Licheng Li 1

1 School of Electric Power, South China University of Technology, Guangzhou 510640, Guangdong Province, China

2 Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, 201800, China

JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 31, NO. 10, MAY 15, 2013

Abstract—A distributed on-line temperature and strain fiber sensing system based on the combined Brillouin optical time domain reflectometry (BOTDR) and fiber Bragg grating (FBG) technology is presented and investigated experimentally for monitoring the overhead transmission lines. The BOTDR sensing system can be used to measure the temperature of transmission lines (Optical Phase Conductor, OPPC or Optical Power Ground Wire, OPGW) which is helpful for monitoring the dynamic ampacity and icing forecasting. In order to effectively monitor the distortion of transmission line induced by the climatic fluctuation and natural disaster, e.g., ice coating and hurricane wind, a quasi-distributed FBG strain sensing system is connected in series with the insulator, integrated into the BOTDR system. The results showed the proposed system was effective and reliable for the monitoring of overhead transmission lines.

Index Terms—BOTDR and FBG, distributed fiber sensor, on-line monitoring, overhead transmission lines.

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