接地系统对附近构筑物的传导干扰分析

Conductive Interference of Substation Grounding System on Neighboring Metal Objects

故障电流通过变电站接地系统散流时会对周围构筑物接地、管道系统的传导干扰影响。结合接地系统地表电位和管道涂层耐受电压值这两个重要参数,分析了土壤结构、间隔距离变化时,变电站接地系统对周围接地系统和管道的传导干扰。结果表明,随着间隔距离的增加,传导干扰有减少的趋势。在距离不变时,土壤结构对传导干扰水平有显著影响。对长距离的管道系统,涂层耐受电压最大值还受到管道涂层电阻的影响。

During short-circuit fault current flows in the substation grounding system and disperse in the soil,the conductive of substation grounding system on neighboring metal objects will be affected.Based on the soil potential of grounding grid and coating stress voltage of pipeline,and according to the change of soil module and separate distance,the conductive interference was analyzed.Results show that the conductive interference is reducing with the increase of separate distance.In the same keeping distance,the soil model has an influence on conductive interference.In addition,for long pipeline,the coating resistance has an influence on coating stress voltage.