基于布里渊光时域反射技术的多参数输电线路覆冰预警  

Detection of transmission line icing based on multiple parameters measured by brillouin optical time domain reflectometer

作　　者：熊菲 丁文红 张益昕 朱晓庚 徐伟弘 张旭苹[3] XIONG Fei;DING Wenhong;ZHANG Yixin;ZHU Xiaogeng;XU Weihong;ZHANG Xuping(Inner Mongolia Electric Power Survey & Design Institute Co., Ltd., Hohhot 010010, China;Inner Mongolia Ultra High Voltage Power Supply Bureau, Hohhot 010080, China;College of Engineering and Applied Sciences, Nanjing University, Nanjing 210008, China;School of Management & Engineering, Nanjing University, Nanjing 210008, China)

机构地区：[1]内蒙古电力勘测设计院有限责任公司,内蒙古呼和浩特010010 [2]内蒙古超高压供电局,内蒙古呼和浩特010080 [3]南京大学现代工程与应用科学学院,江苏南京210008 [4]南京大学工程管理学院,江苏南京210008

出　　处：《电力科学与工程》2019年第1期36-44,共9页Electric Power Science and Engineering

基　　金：内蒙古电力公司2016年科技基金项目

摘　　要：因恶劣天气影响造成的输电线路覆冰将严重威胁到电网的安全稳定运行,并造成巨大的经济损失,实现准确的覆冰预警是电力系统亟待解决的问题。针对这一实际问题,为实现实时监测输电线路运行状态、及时发现并处理线路覆冰,采用布里渊光时域反射仪对武川变-察右中旗变500kV输电线路光纤复合架空地线进行在线运行状态监测,并探究利用布里渊光时域反射技术对光纤进行应力和温度监测以实现输电线路覆冰预警的可行性。数据分析表明,布里渊光时域反射仪可以在一定误差范围内准确测量光纤复合架空地线各点的温度和应力相对大小。结合输电线路覆冰时的温度、积温时间和温度日较差等温度相关参数的特性,提出综合各温度相关参数判断输电线路覆冰的条件;将本装置应用于实际输电线路在线监测,找出了被测光纤复合架空地线在2016年11月间满足该条件的具体位置和对应时间。测量结果与天气预报温度数值和变化趋势相近,表明了试验方法的准确性。The icing on transmission lines caused by severe weather will seriously threaten the safe and stable operation of power grid and cause huge economic losses. How to achieve accurate detection of transmission line icing is a problem yet to be solved. In view of this practical problem, in order to realize real-time monitoring of transmission line operation status, timely detection and treatment of line icing, Brillouin optical time domain reflectometer is adopted to monitor the operation condition of the OPGW of Wuchuan to Chayouzhongqi 500 kV transmission line and the feasibility of detection of transmission line icing based on measuring temperature and strain of the optical fiber by Brillouin optical time domain reflectometer is studied. The result shows that Brillouin optical time domain reflectometer can measure the temperature and relative magnitude of strain of the monitored OPGW within an acceptable range of error. By analyzing the characteristics of temperature and temperature-related parameters including accumulated time of suitable temperature for icing and diurnal variation of temperature, the criteria for determining transmission line icing based on all temperature-related parameters is proposed. Where and when transmission line icing had occurred during November 2016 is identified according to this criteria. The measured results are close to the predicted temperature values and variation trends, indicating the accuracy of the test method.

关 键 词：输电线路 光纤复合架空地线 布里渊光时域反射技术 覆冰 

分 类 号：TN818[电子电信—信息与通信工程]