采用光纤光栅传感器的输电线路铁塔应力监测方法  

Stress monitoring method applying FBG sensor for transmission line towers

作　　者：黄新波[1] 廖明进[1] 徐冠华[2] 朱永灿[3] 赵隆[1] 

机构地区：[1]西安工程大学电子信息学院,陕西西安710048 [2]西安工程大学机电工程学院,陕西西安710048 [3]西安电子科技大学机电工程学院,陕西西安710071

出　　处：《电力自动化设备》2016年第4期68-72,共5页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(51177115);教育部新世纪优秀人才支持计划(NCET-11-1043);陕西省重点科技创新团队计划(2014KCT-16);西安工程大学研究生创新基金资助项目(CX2015027)~~

摘　　要：为防止输电塔塔体倾斜、变形,甚至出现倒塔等事故,提出了一种采用光纤光栅传感器的铁塔应力监测方法,首先利用ANSYS软件建立铁塔有限元模型,分析铁塔易故障点,在此基础上设计光纤光栅传感器,实时采集易故障点的应力信息,通过光纤复合架空地线(OPGW)将信息传送到变电站内的光纤光栅波长解调仪进行解调,然后监测主机对数据进行处理并通过光纤/局域网上传,最终利用监控中心的专家软件对铁塔应力进行整体分析,当铁塔外部载荷过大时提前预警。该方法已在110 k V实验线路安装试运行,监测数据显示,在持续风载荷作用下,可对铁塔的应力进行精确的监测,应力变化与风载变化基本相符。A stress monitoring method applying FBG（Fiber Bragg Grating） sensor is proposed for the transmission line tower to prevent its incline,deformation and fall. ANSYS software is used to build a finite element model of transmission line tower and its flimsy points are analyzed,base on which,FBG sensor is designed to acquire in real time the stress information of flimsy points and OPGW is adopted to transfer the stress information to an optical fiber grating demodulator installed in substation for demodulating. The stress data are then processed by the monitoring host and uploaded to the monitoring center through Fiber / LAN,where they are comprehensively analyzed by the expert software and the warning is issued before the external tower load is too large. The proposed method is applied in an 110 k V line and the experimental monitoring data show that,the tower stress change can be precisely monitored and the tower stress variation is basically corresponding to the wind load variation.

关 键 词：输电铁塔 光纤光栅传感器 应力 解调 监测 模型 

分 类 号：TM72[电气工程—电力系统及自动化] TM75