Journal Article10.3390/photonics11100925
Lightning Location Method Using Orthogonal Coded Polarization Optical Time-Domain Reflectometer in Optical Fiber Transmission
Weihua Lian,Xingrui Su,Wei Li,Bin Wu,Xiaofang Feng,Hanqi Zhao,Desong Wang,Guilong Wu,Lin Liu,Yi-Tong Chen,Kaijing Hu +10 more
TL;DR: A polarization optical time-domain reflectometer (POTDR) method using orthogonal coding technology is proposed to improve lightning location accuracy in power transmission lines, achieving a location error of 200m in 20km sensing distance with enhanced distance and accuracy.
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Abstract: Lightning strike is one of the main factors affecting power transmission lines and may lead to broken strands and damage of transmission lines, resulting in abnormal power supply. To improve the accuracy of lightning location, this paper presents a polarization optical time-domain reflectometer (POTDR) lightning location method based on orthogonal coding technology. The lightning strike point can be located by detecting the state of polarization (SOP) mutation of Rayleigh backscattering in the POTDR system. The orthogonal coding technology is used to improve the distance and accuracy of POTDR lightning location. Through calculation and simulation analysis, the location accuracy is significantly improved at the same sensing distance compared with the ordinary POTDR lightning location method. The lightning strike location error can be limited to 200 m in 20 km sensing distance which meets the actual engineering needs. The results of this paper are important to improve the operation and maintenance efficiency of transmission lines and reduce maintenance costs in the power industry.
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References
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Distributed optical fiber vibration sensor based on spectrum analysis of Polarization-OTDR system
Ziyi Zhang,Xiaoyi Bao +1 more
TL;DR: A fully distributed optical fiber vibration sensor is demonstrated based on spectrum analysis of Polarization-OTDR system and the relation of the disturbance at each frequency component versus location allows detection of multiple events simultaneously with different and the same frequency components.
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Field measurements of SOP transients in OPGW, with time and location correlation to lightning strikes.
D. Charlton,Steven Clarke,David Doucet,Maurice O'Sullivan,Daniel L. Peterson,Darryl Wilson,Glenn A. Wellbrock,Michel P. Belanger +7 more
TL;DR: This work monitored the state of polarization (SOP) of polarized light in an optical ground wire (OPGW) link located in North America using a test method and apparatus that measured Stokes space angular velocity and geographic location of SOP transients.
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