改進(jin)成套(tao)設備的功能(neng)，添(tian)加單(dan)相接(jie)地(di)毛(mao)(mao)病(bing)(bing)(bing)就近(jin)檢測和阻隔，關(guan)于(yu)中性(xing)點不接(jie)地(di)和經消(xiao)弧線圈接(jie)地(di)毛(mao)(mao)病(bing)(bing)(bing)處理辦法(fa)也將是一項重大(da)的技能(neng)革新。提升配網單(dan)相接(jie)地(di)毛(mao)(mao)病(bing)(bing)(bing)選(xuan)線成功率、探索(suo)完善接(jie)地(di)毛(mao)(mao)病(bing)(bing)(bing)阻隔技能(neng)。

現有(you)接(jie)地毛(mao)(mao)(mao)病選(xuan)線維護主要選(xuan)用中性(xing)點經小(xiao)電阻(zu)(zu)(zu)接(jie)地辦法(fa)(fa)下(xia)的零序電流維護或(huo)中性(xing)點非有(you)用接(jie)地辦法(fa)(fa)下(xia)的小(xiao)電流接(jie)地選(xuan)線維護，在(zai)面臨高(gao)阻(zu)(zu)(zu)、間歇性(xing)等毛(mao)(mao)(mao)病時，仍存(cun)在(zai)選(xuan)線準確率差，無法(fa)(fa)有(you)用阻(zu)(zu)(zu)隔毛(mao)(mao)(mao)病，存(cun)在(zai)巨大隱患(huan)。當高(gao)阻(zu)(zu)(zu)接(jie)地到達1000歐姆(mu)以上時，設(she)備(bei)動作(zuo)牢(lao)靠率80%；設(she)備(bei)動作(zuo)后(hou)選(xuan)線準確率90%。毛(mao)(mao)(mao)病檢測精度差開關拒動誤動率高(gao)，導(dao)致配電網牢(lao)靠性(xing)下(xia)降。

從(cong)配(pei)電(dian)網(wang)規劃規劃下手合理的(de)(de)選擇中(zhong)性點接(jie)(jie)(jie)地辦法，開(kai)展(zhan)高(gao)低壓開(kai)關柜(ju)成套(tao)設(she)備技(ji)能(neng)研(yan)(yan)究，開(kai)展(zhan)小電(dian)流接(jie)(jie)(jie)地體系單(dan)相(xiang)接(jie)(jie)(jie)地毛病(bing)(bing)選線(xian)(xian)(xian)辦法的(de)(de)研(yan)(yan)究，進一步(bu)提(ti)高(gao)單(dan)相(xiang)接(jie)(jie)(jie)地毛病(bing)(bing)選線(xian)(xian)(xian)的(de)(de)準確率。選用小電(dian)流接(jie)(jie)(jie)地體系的(de)(de)區域要裝備接(jie)(jie)(jie)地毛病(bing)(bing)線(xian)(xian)(xian)段判別與(yu)(yu)阻(zu)隔設(she)備。國家電(dian)網(wang)正(zheng)在修訂的(de)(de)《配(pei)電(dian)網(wang)技(ji)能(neng)導則》規則變電(dian)站(zhan)要安裝牢靠的(de)(de)選線(xian)(xian)(xian)設(she)備，在10s內切除的(de)(de)接(jie)(jie)(jie)地毛病(bing)(bing)。在小電(dian)流接(jie)(jie)(jie)地配(pei)電(dian)網(wang)中(zhong)，消弧線(xian)(xian)(xian)圈將接(jie)(jie)(jie)地電(dian)流降至只有幾(ji)個安培(pei)，盡管有利于熄(xi)弧，但(dan)也(ye)使毛病(bing)(bing)線(xian)(xian)(xian)路的(de)(de)工頻零(ling)序電(dian)流往往小于非毛病(bing)(bing)線(xian)(xian)(xian)路的(de)(de)電(dian)流并(bing)且二者的(de)(de)相(xiang)位也(ye)根本(ben)相(xiang)同，毛病(bing)(bing)線(xian)(xian)(xian)路工頻零(ling)序電(dian)流沒有了差異(yi)與(yu)(yu)非毛病(bing)(bing)線(xian)(xian)(xian)路的(de)(de)特(te)征，這(zhe)關于單(dan)相(xiang)接(jie)(jie)(jie)地毛病(bing)(bing)檢測來說(shuo)正(zheng)確選線(xian)(xian)(xian)是困難的(de)(de)。

10KV電(dian)(dian)(dian)(dian)(dian)力(li)體系大(da)多是小電(dian)(dian)(dian)(dian)(dian)流(liu)接地(di)體系，當體系中產(chan)(chan)生(sheng)單(dan)相(xiang)接地(di)時(shi)，不(bu)會產(chan)(chan)生(sheng)很大(da)的短路電(dian)(dian)(dian)(dian)(dian)流(liu)。毛(mao)(mao)(mao)(mao)病(bing)(bing)點電(dian)(dian)(dian)(dian)(dian)弧經過(guo)消弧線(xian)(xian)圈補償感抗后(hou)能夠自行平息，熄弧后(hou)接地(di)址絕緣可自行康復，能主動鏟除單(dan)相(xiang)接地(di)毛(mao)(mao)(mao)(mao)病(bing)(bing)。如果間歇性弧光不(bu)能平息，長時(shi)間帶電(dian)(dian)(dian)(dian)(dian)運轉會造(zao)成(cheng)諧振過(guo)電(dian)(dian)(dian)(dian)(dian)壓，產(chan)(chan)生(sheng)幾倍于正常的過(guo)電(dian)(dian)(dian)(dian)(dian)壓，過(guo)電(dian)(dian)(dian)(dian)(dian)壓將進一步使線(xian)(xian)路上的絕緣層(ceng)絕緣子擊穿，造(zao)成(cheng)嚴峻(jun)的相(xiang)間短路事端。不(bu)管是哪種情(qing)況都須要對毛(mao)(mao)(mao)(mao)病(bing)(bing)點定位，隨(sui)后(hou)趕快組織維修毛(mao)(mao)(mao)(mao)病(bing)(bing)點。單(dan)相(xiang)接地(di)毛(mao)(mao)(mao)(mao)病(bing)(bing)產(chan)(chan)生(sheng)后(hou)能維持運轉一定時(shi)間，因此大(da)大(da)提高了供電(dian)(dian)(dian)(dian)(dian)牢靠性。

配(pei)電開關的(de)一二次(ci)成套(tao)設(she)備的(de)技能研發，是(shi)為(wei)了(le)更好(hao)的(de)標準配(pei)網主(zhu)設(she)備，保障建(jian)造過程中一二次(ci)同步建(jian)造投運，防止后期的(de)改造，關于縮短(duan)施工期、提高牢靠性及運維功率(lv)、簡化投標流程等具有重要意義(yi)。