改進成套設備的功(gong)能，添加單相(xiang)接(jie)(jie)地(di)毛(mao)(mao)病(bing)就近檢(jian)測和(he)阻(zu)隔(ge)，關于中性點不接(jie)(jie)地(di)和(he)經消弧線圈接(jie)(jie)地(di)毛(mao)(mao)病(bing)處(chu)理辦法也(ye)將是一項重大的技(ji)(ji)能革新。提升(sheng)配(pei)網單相(xiang)接(jie)(jie)地(di)毛(mao)(mao)病(bing)選(xuan)線成功(gong)率、探(tan)索(suo)完善接(jie)(jie)地(di)毛(mao)(mao)病(bing)阻(zu)隔(ge)技(ji)(ji)能。

現(xian)有(you)(you)接(jie)地毛(mao)病(bing)選(xuan)(xuan)線(xian)維護主要選(xuan)(xuan)用(yong)中(zhong)性(xing)點經小電(dian)阻(zu)接(jie)地辦法下(xia)的(de)零序電(dian)流維護或中(zhong)性(xing)點非有(you)(you)用(yong)接(jie)地辦法下(xia)的(de)小電(dian)流接(jie)地選(xuan)(xuan)線(xian)維護，在面臨高阻(zu)、間歇性(xing)等毛(mao)病(bing)時，仍存在選(xuan)(xuan)線(xian)準確率差(cha)，無法有(you)(you)用(yong)阻(zu)隔毛(mao)病(bing)，存在巨大隱患。當(dang)高阻(zu)接(jie)地到達1000歐姆以上時，設(she)備(bei)動作牢靠率80%；設(she)備(bei)動作后選(xuan)(xuan)線(xian)準確率90%。毛(mao)病(bing)檢測精(jing)度差(cha)開關拒動誤動率高，導致配電(dian)網牢靠性(xing)下(xia)降。

從配電(dian)(dian)網規劃規劃下手合理的(de)(de)(de)(de)(de)選(xuan)(xuan)擇中性點接(jie)(jie)地(di)(di)(di)辦(ban)法(fa)，開展(zhan)高低壓開關(guan)柜成套設(she)(she)備(bei)技(ji)能(neng)研究(jiu)，開展(zhan)小(xiao)電(dian)(dian)流(liu)接(jie)(jie)地(di)(di)(di)體(ti)系單(dan)相(xiang)接(jie)(jie)地(di)(di)(di)毛(mao)(mao)病(bing)選(xuan)(xuan)線(xian)(xian)(xian)辦(ban)法(fa)的(de)(de)(de)(de)(de)研究(jiu)，進(jin)一(yi)步提高單(dan)相(xiang)接(jie)(jie)地(di)(di)(di)毛(mao)(mao)病(bing)選(xuan)(xuan)線(xian)(xian)(xian)的(de)(de)(de)(de)(de)準確(que)(que)率(lv)。選(xuan)(xuan)用小(xiao)電(dian)(dian)流(liu)接(jie)(jie)地(di)(di)(di)體(ti)系的(de)(de)(de)(de)(de)區域要(yao)裝(zhuang)備(bei)接(jie)(jie)地(di)(di)(di)毛(mao)(mao)病(bing)線(xian)(xian)(xian)段(duan)判別與(yu)(yu)阻隔(ge)設(she)(she)備(bei)。國家電(dian)(dian)網正(zheng)在修(xiu)訂的(de)(de)(de)(de)(de)《配電(dian)(dian)網技(ji)能(neng)導則(ze)》規則(ze)變電(dian)(dian)站要(yao)安裝(zhuang)牢靠(kao)的(de)(de)(de)(de)(de)選(xuan)(xuan)線(xian)(xian)(xian)設(she)(she)備(bei)，在10s內(nei)切(qie)除的(de)(de)(de)(de)(de)接(jie)(jie)地(di)(di)(di)毛(mao)(mao)病(bing)。在小(xiao)電(dian)(dian)流(liu)接(jie)(jie)地(di)(di)(di)配電(dian)(dian)網中，消(xiao)弧線(xian)(xian)(xian)圈將接(jie)(jie)地(di)(di)(di)電(dian)(dian)流(liu)降(jiang)至只有(you)(you)幾個安培，盡管有(you)(you)利于熄弧，但也使毛(mao)(mao)病(bing)線(xian)(xian)(xian)路(lu)的(de)(de)(de)(de)(de)工頻(pin)零序電(dian)(dian)流(liu)往往小(xiao)于非毛(mao)(mao)病(bing)線(xian)(xian)(xian)路(lu)的(de)(de)(de)(de)(de)電(dian)(dian)流(liu)并且二者的(de)(de)(de)(de)(de)相(xiang)位也根本相(xiang)同(tong)，毛(mao)(mao)病(bing)線(xian)(xian)(xian)路(lu)工頻(pin)零序電(dian)(dian)流(liu)沒有(you)(you)了差異與(yu)(yu)非毛(mao)(mao)病(bing)線(xian)(xian)(xian)路(lu)的(de)(de)(de)(de)(de)特(te)征，這關(guan)于單(dan)相(xiang)接(jie)(jie)地(di)(di)(di)毛(mao)(mao)病(bing)檢測來說正(zheng)確(que)(que)選(xuan)(xuan)線(xian)(xian)(xian)是困難的(de)(de)(de)(de)(de)。

10KV電(dian)(dian)力(li)體系大多(duo)是(shi)小電(dian)(dian)流接(jie)地體系，當(dang)體系中產生(sheng)單相接(jie)地時(shi)，不(bu)(bu)會產生(sheng)很大的(de)短(duan)路(lu)電(dian)(dian)流。毛(mao)病(bing)(bing)點(dian)電(dian)(dian)弧經過消弧線(xian)圈補償感抗(kang)后能夠自行平息(xi)，熄弧后接(jie)地址絕(jue)(jue)緣(yuan)可自行康復，能主動鏟除單相接(jie)地毛(mao)病(bing)(bing)。如果間歇性(xing)弧光不(bu)(bu)能平息(xi)，長時(shi)間帶電(dian)(dian)運(yun)轉會造(zao)成諧振(zhen)過電(dian)(dian)壓，產生(sheng)幾倍(bei)于正(zheng)常的(de)過電(dian)(dian)壓，過電(dian)(dian)壓將進一步使線(xian)路(lu)上的(de)絕(jue)(jue)緣(yuan)層絕(jue)(jue)緣(yuan)子擊穿，造(zao)成嚴峻的(de)相間短(duan)路(lu)事端(duan)。不(bu)(bu)管(guan)是(shi)哪種(zhong)情(qing)況都須要對毛(mao)病(bing)(bing)點(dian)定位，隨后趕快(kuai)組織維修毛(mao)病(bing)(bing)點(dian)。單相接(jie)地毛(mao)病(bing)(bing)產生(sheng)后能維持運(yun)轉一定時(shi)間，因(yin)此大大提高了供(gong)電(dian)(dian)牢靠性(xing)。

配電開(kai)關的一(yi)二(er)次成套設備(bei)的技能(neng)研發(fa)，是為(wei)了(le)更(geng)好的標(biao)準配網(wang)主設備(bei)，保障建(jian)造(zao)過程中一(yi)二(er)次同(tong)步建(jian)造(zao)投(tou)運(yun)，防止后(hou)期(qi)的改造(zao)，關于縮短施工(gong)期(qi)、提高牢靠(kao)性(xing)及運(yun)維功率、簡化投(tou)標(biao)流(liu)程等具(ju)有(you)重要意義。