原有消(xiao)弧(hu)線圈(quan)容量(liang)不足(zu)，接地時(shi)選線裝置(zhi)準(zhun)確率低僅為60%左(zuo)右，導致相關的配網自(zi)動(dong)化(hua)系統在接地故障時(shi)無法發揮效(xiao)用。本次技(ji)改通(tong)過(guo)(guo)將原有消(xiao)弧(hu)線圈(quan)更(geng)換為消(xiao)弧(hu)線圈(quan)并(bing)聯小(xiao)電(dian)阻接地成(cheng)套(tao)裝置(zhi)，接地持續時(shi)間長于10s的故障通(tong)過(guo)(guo)將小(xiao)電(dian)阻正(zheng)確投入，確保(bao)零(ling)序(xu)保(bao)護(hu)正(zheng)確動(dong)作，準(zhun)確切除故障線路，使得系統快速恢復正(zheng)常。