光纤复合架空地线雷电直接效应的实验研究  

Lightning Direct Effect of Optical Fiber Overhead Ground Wires under Continuous Two Lightning Components

作　　者：孙晋茹 姚学玲[1] 许雯珺 乐杨晶 陈景亮[1] 

机构地区：[1]西安交通大学电力设备电气绝缘国家重点实验室,西安710049

出　　处：《西安交通大学学报》2018年第2期82-88,共7页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目(51477132;51521065);陕西省创新团队资助项目(2012KCT-07);中央高校基本科研业务费资助项目(xkjc2014006)

摘　　要：基于对现行的光纤复合架空地线(OPGW)雷击测试标准及研究现状的分析,提出了OPGW连续时序雷电直接效应的实验方法,并建立了雷电流B分量与连续电流C分量组成的多重连续时序雷电直接效应的实验平台,评估雷电流C分量的幅值和作用间隙对OPGW雷击损伤的影响规律,探索雷电流对OPGW的作用机理及散流特性。研究发现:随着C分量转移电荷量的增加,OPGW外层铝包钢股线熔断烧蚀程度不断加剧,雷击过后的温度不断升高。在转移电荷为200C时,雷击后瞬间OPGW表面的温度超过3 700℃,约30%的股线发生严重损伤。随着雷击实验作用间隙由5cm增加至6cm,OPGW试品雷击后的温升减小40%,损伤程度也有所减轻。研究内容能够为OPGW雷击实验方法的规范及防雷特性的评估提供基本实验支撑和理论依据。By analyzing the current standard of lightning testing and performance for the optical ground wire(OPGW),the lightning direct effect testing system with an adjustable discharge gap for the OPGW is constructed.The lightning strike characteristics and damage performance of OPGW under different experimental conditions of variable DC currents and discharge gaps are evaluated in the experiments. The mechanism of lightning direct effect and conducting performance of OPGW are explored preliminarily.It is found that as the Al-Steel outer layer of the OPGW,the erosion degree of the aluminum-clad steel wire increases with the increasing transfer charge of DC current C component.When the transfer charge gets about 200 C,the temperature of the OPGW surface after the lightning strikes is estimated for more than 3 700℃,and more than 30% of the strands are damaged severely.Moreover,when the length of discharge gap increases from 5 cm to 6 cm,the temperature rise of OPGW due to the lightning strike decreases and the lightning damage degree is reduced over 40%.

关 键 词：光纤复合架空地线 雷电直接效应 转移电荷量 作用间隙 温度分布 雷击断股 

分 类 号：TM863[电气工程—高电压与绝缘技术]