原(yuan)(yuan)有消(xiao)弧線(xian)(xian)圈容量不足，接(jie)地(di)時(shi)選線(xian)(xian)裝置(zhi)準確(que)(que)率低僅為(wei)60%左(zuo)右(you)，導(dao)致相(xiang)關(guan)的配網自動(dong)化系統在接(jie)地(di)故障時(shi)無法(fa)發(fa)揮效用。本次(ci)技(ji)改(gai)通(tong)過(guo)將(jiang)原(yuan)(yuan)有消(xiao)弧線(xian)(xian)圈更換為(wei)消(xiao)弧線(xian)(xian)圈并聯(lian)小(xiao)電阻接(jie)地(di)成套裝置(zhi)，接(jie)地(di)持(chi)續時(shi)間長于(yu)10s的故障通(tong)過(guo)將(jiang)小(xiao)電阻正(zheng)確(que)(que)投入(ru)，確(que)(que)保(bao)零序保(bao)護正(zheng)確(que)(que)動(dong)作(zuo)，準確(que)(que)切除故障線(xian)(xian)路，使得系統快速恢復正(zheng)常。