基于OTDR技术的高压输电导线断股和损伤检测  

Detection of broken strands and damage faults of high-voltage transmission line based on OTDR technology

作　　者：杨凌辉[1] 肖嵘[1] 季献武[1] 任亮[2] 贾子光[2] 李宏男[2] 

机构地区：[1]上海市电力公司电力科学研究院,上海200437 [2]大连理工大学建设工程学部,辽宁大连116024

出　　处：《光电子．激光》2013年第5期961-966,共6页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金委创新研究群体基金(51121005);国家自然科学基金面上项目(51108059);国家重点基础研究发展计划(2011CB013605);国家地震专项(200808074);高等学校学科创新引智计划(B08014)资助项目

摘　　要：为了保证高压输电线路的正常运行,及时准确地对输电导线的断股、损伤进行检测,提出了一种应用光时域反射仪(OTDR)技术对输电导线断股、损伤进行分布式光纤传感检测的方法。基于OTDR技术搭建了利用钢管模拟输电导线的模拟损伤试验系统,进行了高压输电导线断股、损伤实物试验。高压输电导线断股、损伤模拟试验及实物试验的结果表明,应用OTDR技术可以有效地识别出高压输电导线的断股、损伤,并能够对损伤部位进行精确地定位。Power transmission line, especially high-voltage transmission line plays an important role in electrical power supply system. Therefore,in order to ensure the safety of high-voltage transmission line in service ,it is of vital importance to detect broken strands and damage faults of high-voltage transmission line timely and accurately. However, the commonly used methods have some problems in practical engineering. Optical time domain reflectometry （OTDR） is a commonly used instrument for fiber characterization and fault location in optical transmission systems. In this paper,a new method of detecting broken strands and damage faults of high-voltage transmission line based on OTDR technology is put forward. The theory of testing with OTDR is introduced at first. Model experimental study is conducted on a steel tube to simulate the high-voltage transmission wire,including axial tension test and horizontal shear test. Then damage simulation experiment is carried out on a section of original aluminum transmission wire. The results of the experiment demonstrate that this detecting system can be used to discriminate high-voltage transmission wire broken strands and damage faults accurately and also to estimate the crack width on the wire surface according to the level of the measured optical loss. The proposed monitoring method based on OTDR shows promising potential in broken strands and damage faults detection of high-voltage transmission line.

关 键 词：高压输电导线 光时域反射仪(OTDR) 导线断股 健康监测 

分 类 号：TM726.3[电气工程—电力系统及自动化] TN929.11[电子电信—通信与信息系统]