大胜关长江大桥轨道交通接触网避雷器选型及配置研究

Research on selection and configuration of arresters for rail transit contact net of Dashengguan Yangtze River Bridge

针对南京大胜关长江大桥轨道交通接触网雷击问题,文章提出在支柱绝缘子上并联安装带串联间隙金属氧化物避雷器的方案,从结构型式选择、电阻片参数、串联间隙距离和避雷器本体参数4个方面进行避雷器选型,并分析逐基支柱安装避雷器和隔基支柱安装避雷器2种配置方式的雷电防护效果。仿真分析给出接触网用避雷器参数,并且建议接触网避雷器配置方式采用逐基支柱安装避雷器的方案。

Aiming at the lightning strike problem of the rail transit contact net of the Nanjing Dashengguan Yangtze River Bridge,this paper proposes a parallel installation of metal oxide surge arrester with series gap on the pillar insulators.Arrester selection is conducted in terms of the selection of structure,the parameters of the resistors,the distance of the series gap and the parameters of the arrester,and the lightning protection effect of two configuration modes of installing arrester on each base pillar and installing arrester on isolated pillar is analyzed.Through simulation analysis,the parameters of the arrester for contact net can be given,and it is suggested that the scheme of installing the arrester on each base pillar is suitable for the contact net.