改進成(cheng)套設(she)備的(de)功能(neng)(neng)(neng)，添加單相接(jie)(jie)地(di)毛病就近檢測和(he)阻隔，關于中性點(dian)不(bu)接(jie)(jie)地(di)和(he)經(jing)消弧(hu)線圈接(jie)(jie)地(di)毛病處(chu)理辦法(fa)也將是一項(xiang)重大的(de)技能(neng)(neng)(neng)革新。提升配網單相接(jie)(jie)地(di)毛病選線成(cheng)功率、探索(suo)完善(shan)接(jie)(jie)地(di)毛病阻隔技能(neng)(neng)(neng)。

現有(you)接(jie)地(di)毛病選(xuan)線(xian)(xian)維護主要選(xuan)用中(zhong)性點經小電阻(zu)(zu)接(jie)地(di)辦法(fa)下(xia)的(de)零序電流(liu)維護或中(zhong)性點非有(you)用接(jie)地(di)辦法(fa)下(xia)的(de)小電流(liu)接(jie)地(di)選(xuan)線(xian)(xian)維護，在面(mian)臨(lin)高阻(zu)(zu)、間歇性等毛病時(shi)，仍存在選(xuan)線(xian)(xian)準確(que)率(lv)(lv)差(cha)，無法(fa)有(you)用阻(zu)(zu)隔毛病，存在巨大隱患。當高阻(zu)(zu)接(jie)地(di)到達(da)1000歐(ou)姆(mu)以上時(shi)，設(she)備(bei)動(dong)作(zuo)牢靠率(lv)(lv)80%；設(she)備(bei)動(dong)作(zuo)后(hou)選(xuan)線(xian)(xian)準確(que)率(lv)(lv)90%。毛病檢測精度(du)差(cha)開關(guan)拒動(dong)誤(wu)動(dong)率(lv)(lv)高，導致配電網(wang)牢靠性下(xia)降。

從(cong)配(pei)電(dian)(dian)(dian)(dian)網規(gui)(gui)劃(hua)規(gui)(gui)劃(hua)下手合理(li)的(de)(de)(de)(de)(de)選(xuan)擇中(zhong)性點接(jie)地(di)(di)辦(ban)法(fa)，開(kai)展高低壓開(kai)關柜成套設備(bei)技(ji)能研(yan)究，開(kai)展小(xiao)電(dian)(dian)(dian)(dian)流接(jie)地(di)(di)體(ti)系單相(xiang)接(jie)地(di)(di)毛(mao)(mao)(mao)病(bing)選(xuan)線(xian)辦(ban)法(fa)的(de)(de)(de)(de)(de)研(yan)究，進(jin)一步(bu)提高單相(xiang)接(jie)地(di)(di)毛(mao)(mao)(mao)病(bing)選(xuan)線(xian)的(de)(de)(de)(de)(de)準確率。選(xuan)用小(xiao)電(dian)(dian)(dian)(dian)流接(jie)地(di)(di)體(ti)系的(de)(de)(de)(de)(de)區域要裝備(bei)接(jie)地(di)(di)毛(mao)(mao)(mao)病(bing)線(xian)段判別與阻(zu)隔設備(bei)。國(guo)家電(dian)(dian)(dian)(dian)網正在(zai)修訂的(de)(de)(de)(de)(de)《配(pei)電(dian)(dian)(dian)(dian)網技(ji)能導則》規(gui)(gui)則變電(dian)(dian)(dian)(dian)站要安裝牢(lao)靠的(de)(de)(de)(de)(de)選(xuan)線(xian)設備(bei)，在(zai)10s內切(qie)除的(de)(de)(de)(de)(de)接(jie)地(di)(di)毛(mao)(mao)(mao)病(bing)。在(zai)小(xiao)電(dian)(dian)(dian)(dian)流接(jie)地(di)(di)配(pei)電(dian)(dian)(dian)(dian)網中(zhong)，消弧線(xian)圈將接(jie)地(di)(di)電(dian)(dian)(dian)(dian)流降至(zhi)只有幾個安培，盡(jin)管有利于熄弧，但也(ye)使(shi)毛(mao)(mao)(mao)病(bing)線(xian)路的(de)(de)(de)(de)(de)工頻零序電(dian)(dian)(dian)(dian)流往往小(xiao)于非毛(mao)(mao)(mao)病(bing)線(xian)路的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)流并且二者的(de)(de)(de)(de)(de)相(xiang)位也(ye)根本相(xiang)同(tong)，毛(mao)(mao)(mao)病(bing)線(xian)路工頻零序電(dian)(dian)(dian)(dian)流沒有了差異與非毛(mao)(mao)(mao)病(bing)線(xian)路的(de)(de)(de)(de)(de)特征，這關于單相(xiang)接(jie)地(di)(di)毛(mao)(mao)(mao)病(bing)檢測來說正確選(xuan)線(xian)是困難(nan)的(de)(de)(de)(de)(de)。

10KV電(dian)(dian)力體(ti)系(xi)大(da)多是(shi)小電(dian)(dian)流接(jie)地(di)(di)(di)體(ti)系(xi)，當體(ti)系(xi)中產(chan)生(sheng)單(dan)相接(jie)地(di)(di)(di)時，不會產(chan)生(sheng)很大(da)的短路(lu)電(dian)(dian)流。毛(mao)病點(dian)(dian)電(dian)(dian)弧(hu)經(jing)過(guo)消(xiao)弧(hu)線圈(quan)補償感抗后能(neng)夠(gou)自(zi)行平息(xi)，熄弧(hu)后接(jie)地(di)(di)(di)址絕(jue)緣可(ke)自(zi)行康(kang)復，能(neng)主動鏟除單(dan)相接(jie)地(di)(di)(di)毛(mao)病。如果間(jian)歇性弧(hu)光不能(neng)平息(xi)，長時間(jian)帶(dai)電(dian)(dian)運轉會造成(cheng)諧(xie)振過(guo)電(dian)(dian)壓，產(chan)生(sheng)幾倍于正常的過(guo)電(dian)(dian)壓，過(guo)電(dian)(dian)壓將進一(yi)步使線路(lu)上的絕(jue)緣層(ceng)絕(jue)緣子擊穿，造成(cheng)嚴峻的相間(jian)短路(lu)事(shi)端。不管(guan)是(shi)哪(na)種情況都須(xu)要對毛(mao)病點(dian)(dian)定位，隨(sui)后趕(gan)快組織維修毛(mao)病點(dian)(dian)。單(dan)相接(jie)地(di)(di)(di)毛(mao)病產(chan)生(sheng)后能(neng)維持運轉一(yi)定時間(jian)，因此(ci)大(da)大(da)提高(gao)了(le)供電(dian)(dian)牢靠性。

配(pei)電開關的(de)一二次(ci)成套設(she)備的(de)技能研發，是為了(le)更好的(de)標準配(pei)網主設(she)備，保(bao)障建造過程(cheng)(cheng)中一二次(ci)同步建造投(tou)運，防止后期的(de)改造，關于縮短施工期、提高牢靠性及運維功率、簡(jian)化投(tou)標流程(cheng)(cheng)等具有重要意義。