基于光波分复用的超长距离光缆随路状态监测  

Optical wavelength division multiplexing based ultra-long-distance fiber optic cable monitoring

作　　者：周文婷 张海波 王鑫 董晓梅 ZHOU Wen-ting;ZHANG Hai-bo;WANG Xin;DONG Xiao-mei(Information and Communication Company of State Grid Xinjiang Electric Power Co.,Ltd,Urumqi 830002,China)

机构地区：[1]国网新疆电力有限公司信息通信公司,新疆乌鲁木齐830002

出　　处：《光电子．激光》2020年第9期915-920,共6页Journal of Optoelectronics·Laser

基　　金：超长距光缆随路在线监测系统应用研究(SGXJXT00JFJS1900096)资助项目。

摘　　要：在光缆随路状态监测过程中,为避免因光信号波长分离难度大而影响状态监测的准确性,本研究在现场监测站采集光信号的基础上,利用光波分复用过程实现对不同波长光信号的分离处理。根据分离结果,通过OTDR测试获得监测点到光缆故障点之间的距离,再结合小波变换过程确定最大故障衰减信息。基于此,利用BP算法实现对超长距离光缆随路中存在的故障点的定位,实现对光缆随路状态的监测。实验结果表明:该方法的监测过程耗时始终保持在4 min之内,且故障定位准确度在80%左右,证明该方法监测过程耗时短、效率高,且对故障点的定位准确度较高,大大提升了状态监测结果的准确性。In the process of monitoring the state of the optical cable along the road,in order to avoid affecting the accuracy of the condition monitoring due to the difficulty of the wavelength separation of the optical signal,this study uses the optical wavelength division multiplexing process to implement different wavelengths of light on the basis of the optical signals collected at the on-site monitoring station.Signal separation processing.According to the separation result,the distance between the monitoring point and the fault point of the optical cable is obtained through the OTDR test,and combined with the wavelet transform process to determine the maximum fault attenuation information.Based on this,the BP algorithm is used to locate the fault points in the ultra-long-distance optical cable along the path,and to monitor the status of the optical cable along the path.In the process of monitoring the state of the optical cable along the road,in order to avoid affecting the accuracy of the condition monitoring due to the difficulty of the wavelength separation of the optical signal,this study uses the optical wavelength division multiplexing process to implement different wavelengths of light on the basis of the optical signals collected at the on-site monitoring station.Signal separation processing.According to the separation result,the distance between the monitoring point and the fault point of the optical cable is obtained through the OTDR test,and combined with the wavelet transform process to determine the maximum fault attenuation information.Based on this,the BP algorithm is used to locate the fault points in the ultra-long-distance optical cable along the path,and to monitor the status of the optical cable along the path.The experimental results show that the monitoring time of this method is always kept within 4 min,and the fault location accuracy is about 80%.It proves that this method is short in the monitoring process,high in efficiency,and high in the fault location accuracy,which greatly improves the a

关 键 词：光波分复用 光缆随路 故障定位 状态监测 地理信息系统 

分 类 号：TN252[电子电信—物理电子学]