改(gai)進成套設備的功能(neng)，添加單相接地(di)毛(mao)病(bing)(bing)就近檢測和(he)阻隔(ge)，關于中性點(dian)不接地(di)和(he)經消(xiao)弧線(xian)圈(quan)接地(di)毛(mao)病(bing)(bing)處理辦法也將是一項重大的技(ji)能(neng)革新。提升(sheng)配網(wang)單相接地(di)毛(mao)病(bing)(bing)選線(xian)成功率、探(tan)索完(wan)善接地(di)毛(mao)病(bing)(bing)阻隔(ge)技(ji)能(neng)。

現有(you)接(jie)地毛(mao)病(bing)選(xuan)線(xian)維(wei)護主(zhu)要選(xuan)用(yong)(yong)中(zhong)性點經(jing)小電(dian)阻接(jie)地辦法(fa)(fa)(fa)下的零序電(dian)流(liu)維(wei)護或中(zhong)性點非有(you)用(yong)(yong)接(jie)地辦法(fa)(fa)(fa)下的小電(dian)流(liu)接(jie)地選(xuan)線(xian)維(wei)護，在(zai)面臨高(gao)阻、間歇性等毛(mao)病(bing)時，仍(reng)存(cun)在(zai)選(xuan)線(xian)準(zhun)確(que)(que)率(lv)差，無法(fa)(fa)(fa)有(you)用(yong)(yong)阻隔毛(mao)病(bing)，存(cun)在(zai)巨大(da)隱患。當高(gao)阻接(jie)地到達(da)1000歐姆以上時，設備動作牢(lao)靠(kao)率(lv)80%；設備動作后(hou)選(xuan)線(xian)準(zhun)確(que)(que)率(lv)90%。毛(mao)病(bing)檢測精度差開關拒動誤(wu)動率(lv)高(gao)，導(dao)致配(pei)電(dian)網牢(lao)靠(kao)性下降(jiang)。

從配電(dian)(dian)網(wang)規劃(hua)規劃(hua)下手合理的(de)(de)(de)(de)選擇中性點接(jie)(jie)地(di)辦(ban)法(fa)，開(kai)展(zhan)高(gao)低壓開(kai)關柜成套設(she)(she)備技能研究，開(kai)展(zhan)小電(dian)(dian)流(liu)(liu)(liu)接(jie)(jie)地(di)體系(xi)單(dan)相(xiang)接(jie)(jie)地(di)毛(mao)病(bing)選線(xian)(xian)(xian)(xian)辦(ban)法(fa)的(de)(de)(de)(de)研究，進(jin)一步提高(gao)單(dan)相(xiang)接(jie)(jie)地(di)毛(mao)病(bing)選線(xian)(xian)(xian)(xian)的(de)(de)(de)(de)準確(que)率。選用小電(dian)(dian)流(liu)(liu)(liu)接(jie)(jie)地(di)體系(xi)的(de)(de)(de)(de)區(qu)域要裝備接(jie)(jie)地(di)毛(mao)病(bing)線(xian)(xian)(xian)(xian)段判別與阻隔設(she)(she)備。國家電(dian)(dian)網(wang)正(zheng)在修訂的(de)(de)(de)(de)《配電(dian)(dian)網(wang)技能導則(ze)》規則(ze)變電(dian)(dian)站要安裝牢(lao)靠的(de)(de)(de)(de)選線(xian)(xian)(xian)(xian)設(she)(she)備，在10s內切除的(de)(de)(de)(de)接(jie)(jie)地(di)毛(mao)病(bing)。在小電(dian)(dian)流(liu)(liu)(liu)接(jie)(jie)地(di)配電(dian)(dian)網(wang)中，消弧線(xian)(xian)(xian)(xian)圈將接(jie)(jie)地(di)電(dian)(dian)流(liu)(liu)(liu)降至(zhi)只有(you)幾個安培，盡管有(you)利于熄弧，但(dan)也使毛(mao)病(bing)線(xian)(xian)(xian)(xian)路(lu)的(de)(de)(de)(de)工頻零序(xu)電(dian)(dian)流(liu)(liu)(liu)往往小于非毛(mao)病(bing)線(xian)(xian)(xian)(xian)路(lu)的(de)(de)(de)(de)電(dian)(dian)流(liu)(liu)(liu)并且二者的(de)(de)(de)(de)相(xiang)位也根(gen)本相(xiang)同，毛(mao)病(bing)線(xian)(xian)(xian)(xian)路(lu)工頻零序(xu)電(dian)(dian)流(liu)(liu)(liu)沒(mei)有(you)了差異與非毛(mao)病(bing)線(xian)(xian)(xian)(xian)路(lu)的(de)(de)(de)(de)特征，這關于單(dan)相(xiang)接(jie)(jie)地(di)毛(mao)病(bing)檢測(ce)來說正(zheng)確(que)選線(xian)(xian)(xian)(xian)是困難的(de)(de)(de)(de)。

10KV電(dian)(dian)(dian)(dian)力體(ti)系(xi)大多是小電(dian)(dian)(dian)(dian)流接(jie)(jie)(jie)地(di)體(ti)系(xi)，當(dang)體(ti)系(xi)中產(chan)生單相(xiang)(xiang)(xiang)接(jie)(jie)(jie)地(di)時，不會(hui)產(chan)生很大的(de)短路(lu)電(dian)(dian)(dian)(dian)流。毛(mao)(mao)病點(dian)電(dian)(dian)(dian)(dian)弧(hu)經過(guo)(guo)消弧(hu)線圈補(bu)償感抗(kang)后(hou)(hou)能夠自行(xing)平息，熄(xi)弧(hu)后(hou)(hou)接(jie)(jie)(jie)地(di)址絕(jue)緣(yuan)可自行(xing)康復，能主(zhu)動鏟除單相(xiang)(xiang)(xiang)接(jie)(jie)(jie)地(di)毛(mao)(mao)病。如果間(jian)(jian)歇性弧(hu)光不能平息，長時間(jian)(jian)帶電(dian)(dian)(dian)(dian)運轉會(hui)造成諧振(zhen)過(guo)(guo)電(dian)(dian)(dian)(dian)壓，產(chan)生幾倍于正常的(de)過(guo)(guo)電(dian)(dian)(dian)(dian)壓，過(guo)(guo)電(dian)(dian)(dian)(dian)壓將進(jin)一步使線路(lu)上的(de)絕(jue)緣(yuan)層絕(jue)緣(yuan)子擊(ji)穿(chuan)，造成嚴峻的(de)相(xiang)(xiang)(xiang)間(jian)(jian)短路(lu)事(shi)端。不管是哪種情況都須要對毛(mao)(mao)病點(dian)定位(wei)，隨后(hou)(hou)趕快(kuai)組織維(wei)修毛(mao)(mao)病點(dian)。單相(xiang)(xiang)(xiang)接(jie)(jie)(jie)地(di)毛(mao)(mao)病產(chan)生后(hou)(hou)能維(wei)持(chi)運轉一定時間(jian)(jian)，因此大大提(ti)高了(le)供電(dian)(dian)(dian)(dian)牢靠性。

配電開關的(de)一二次(ci)(ci)成套設(she)備(bei)的(de)技能研(yan)發，是為了更好的(de)標(biao)(biao)準配網(wang)主設(she)備(bei)，保障建造(zao)過程中一二次(ci)(ci)同步建造(zao)投(tou)運，防(fang)止后期(qi)的(de)改造(zao)，關于縮短施工期(qi)、提高牢靠性(xing)及運維功率、簡化投(tou)標(biao)(biao)流程等具有重要意義(yi)。