用低反射率光栅阵列实现智能复合电力电缆温度监测  

Temperature monitoring for intelligent composite electric cable by weak reflective fiber Bragg grating array

作　　者：陶渊 张翠[1,2] 童杏林 何为[1,2] 邓承伟 甘维兵 王立新[1] TAO Yuan;ZHANG Cui;TONG Xing-lin;HE wei;DENG Cheng-wei;GAN Wei-bing;W\NG Li-xin(National Engineering Laboratory for Fiber Optic Sensing Technology .Wuhan University of Technology ,Wuhan 430070, Hubei China;School of Mechanical and Electronic Engineering,Wuhan University of Technology ,Wuhan 430070,Hubei China)

机构地区：[1]武汉理工大学光纤传感技术国家工程实验室,湖北武汉430070 [2]武汉理工大学机电工程学院,湖北武汉430070

出　　处：《光电子．激光》2019年第2期134-139,共6页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金(61575148);国家高技术研究发展计划(2015AA043505);湖北省技术创新专项(2017ACA167)资助项目

摘　　要：针对现有的电缆温度监测方法主要存在无法检测电缆内部温度和测温时易受到应力影响等缺点。针对此本文研究采用低反射率光栅(wFBG)阵列智能复合电力电缆温度监测技术,用于实时监测电缆内部及外部的温度分布情况。通过免应力光栅阵列,解决了复合电缆和光缆的过程中因光纤受力而影响光栅波长准确测量从而造成对温度的影响问题。系统通过检测wFBG波长漂移得到温度信息从而实现高灵敏度高空间分辨率的智能电缆的分布式温度在线监测。搭建了基于wFBG阵列的复合电力电缆实验系统,结果表明,该系统可以实现对电缆内部及外部温度的高精度、高空间分辨率分布式测量,电缆沿线空间分辨率达到10 cm,测温精度达到0.1℃。该低反射率光栅阵列智能复合电力电缆温度监测系统可以满足智能电网运行的实际需要。This paper uses the temperature monitoring technology on intelligent composite electric cable to monitor the temperature of the electric cable in real time based on weak fiber Bragg grating(wFBG) array.Through two optical fibers in parallel connection,the monitoring of the internal and external temperatures of the electric cable can be realized and the influence of stress during temperature measurement can be avoided.The temperature signal is obtained by detecting wFBG wavelength drift to achieve high accuracy and high spatial resolution temperature measurement.The system is experimentally studied using the wFBG array.The results show that the system can achieve high accuracy,high sensitivity and high spatial resolution distributed measurement of the internal and external temperatures of the electric cable,and its spatial resolution is up to 10 cm,the measurement accuracy is 0.1 ℃.The temperature monitoring system of intelligent composite electric cable based on wFBG array can meet the actual needs of smart grid operation.

关 键 词：弱光栅阵列 复合电缆 温度 分布式测量 

分 类 号：TN253[电子电信—物理电子学]