LIN Rui,ZHU Yi-feng,TIAN Lin,ZHOU Li-ming,LIU Wei-ming,CHENG Ling-hao.On-situ monitoring of sleet-thawing for OPGW based on long distance BOTDR[J].Optoelectronics Letters,2021,17(4):226-230
On-situ monitoring of sleet-thawing for OPGW based on long distance BOTDR
Author NameAffiliation
LIN Rui EHV Power Transmission Company, China Southern Power Grid Co.Ltd., Guangzhou 510000, China 
ZHU Yi-feng EHV Power Transmission Company, China Southern Power Grid Co.Ltd., Guangzhou 510000, China 
TIAN Lin EHV Power Transmission Company, China Southern Power Grid Co.Ltd., Guangzhou 510000, China 
ZHOU Li-ming Institute of Photonics Technology, Jinan University, Guangzhou 510632, China 
LIU Wei-ming Institute of Photonics Technology, Jinan University, Guangzhou 510632, China 
CHENG Ling-hao Institute of Photonics Technology, Jinan University, Guangzhou 510632, China 
Abstract:
      With the absence of on-situ temperature monitoring of optical fiber composite overhead ground wire (OPGW) for the process of sleet-thawing, early temperature warning and safety control of direct current (DC) in sleet-thawing process is difficult. Here we propose a Brillouin optical time-domain reflectometry (BOTDR) with broadband receiving for fast measurement and with distributed Raman amplification for long distance measurement of about 100 km. A field experiment for on-situ temperature monitoring of sleet-thawing of OPGW is also reported, which shows uneven change of temperature along the OPGW. The difference between the maximum and the minimum temperature change can be greater than 40 °C.
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