改進成套設備(bei)的功能，添加(jia)單相(xiang)(xiang)接地(di)毛(mao)病(bing)就近檢測和阻(zu)隔，關(guan)于中性點不接地(di)和經(jing)消弧(hu)線圈接地(di)毛(mao)病(bing)處理(li)辦法(fa)也將是一項重大的技能革新。提升配網單相(xiang)(xiang)接地(di)毛(mao)病(bing)選線成功率、探索完善接地(di)毛(mao)病(bing)阻(zu)隔技能。

現有接(jie)(jie)地毛病(bing)選(xuan)線(xian)維(wei)護(hu)主要選(xuan)用中性(xing)(xing)點經小電阻接(jie)(jie)地辦(ban)法下的零序電流(liu)維(wei)護(hu)或中性(xing)(xing)點非(fei)有用接(jie)(jie)地辦(ban)法下的小電流(liu)接(jie)(jie)地選(xuan)線(xian)維(wei)護(hu)，在面(mian)臨高(gao)(gao)阻、間(jian)歇(xie)性(xing)(xing)等(deng)毛病(bing)時，仍存在選(xuan)線(xian)準確(que)(que)率差(cha)，無法有用阻隔(ge)毛病(bing)，存在巨(ju)大隱患(huan)。當(dang)高(gao)(gao)阻接(jie)(jie)地到達1000歐姆(mu)以上時，設(she)備動(dong)作(zuo)牢(lao)靠率80%；設(she)備動(dong)作(zuo)后選(xuan)線(xian)準確(que)(que)率90%。毛病(bing)檢(jian)測(ce)精度差(cha)開關拒動(dong)誤動(dong)率高(gao)(gao)，導致配電網(wang)牢(lao)靠性(xing)(xing)下降。

從配電(dian)(dian)(dian)(dian)網規(gui)劃規(gui)劃下手合(he)理的(de)(de)選擇中性點接(jie)地(di)(di)辦(ban)法(fa)，開(kai)展高(gao)低壓開(kai)關(guan)柜成套設備技能研(yan)究，開(kai)展小電(dian)(dian)(dian)(dian)流接(jie)地(di)(di)體(ti)系單(dan)相(xiang)接(jie)地(di)(di)毛(mao)(mao)(mao)病(bing)選線(xian)(xian)辦(ban)法(fa)的(de)(de)研(yan)究，進一步提(ti)高(gao)單(dan)相(xiang)接(jie)地(di)(di)毛(mao)(mao)(mao)病(bing)選線(xian)(xian)的(de)(de)準(zhun)確率(lv)。選用小電(dian)(dian)(dian)(dian)流接(jie)地(di)(di)體(ti)系的(de)(de)區(qu)域(yu)要裝(zhuang)備接(jie)地(di)(di)毛(mao)(mao)(mao)病(bing)線(xian)(xian)段判別與(yu)(yu)阻隔設備。國家電(dian)(dian)(dian)(dian)網正(zheng)在修訂(ding)的(de)(de)《配電(dian)(dian)(dian)(dian)網技能導(dao)則》規(gui)則變電(dian)(dian)(dian)(dian)站要安裝(zhuang)牢(lao)靠的(de)(de)選線(xian)(xian)設備，在10s內切除(chu)的(de)(de)接(jie)地(di)(di)毛(mao)(mao)(mao)病(bing)。在小電(dian)(dian)(dian)(dian)流接(jie)地(di)(di)配電(dian)(dian)(dian)(dian)網中，消弧線(xian)(xian)圈將接(jie)地(di)(di)電(dian)(dian)(dian)(dian)流降至只有幾個安培(pei)，盡(jin)管有利于熄弧，但也使毛(mao)(mao)(mao)病(bing)線(xian)(xian)路(lu)的(de)(de)工頻零(ling)序電(dian)(dian)(dian)(dian)流往往小于非(fei)毛(mao)(mao)(mao)病(bing)線(xian)(xian)路(lu)的(de)(de)電(dian)(dian)(dian)(dian)流并(bing)且二者的(de)(de)相(xiang)位(wei)也根本相(xiang)同，毛(mao)(mao)(mao)病(bing)線(xian)(xian)路(lu)工頻零(ling)序電(dian)(dian)(dian)(dian)流沒有了(le)差異與(yu)(yu)非(fei)毛(mao)(mao)(mao)病(bing)線(xian)(xian)路(lu)的(de)(de)特征，這關(guan)于單(dan)相(xiang)接(jie)地(di)(di)毛(mao)(mao)(mao)病(bing)檢測來說(shuo)正(zheng)確選線(xian)(xian)是困難的(de)(de)。

10KV電(dian)力體系大(da)多是小(xiao)電(dian)流(liu)接(jie)(jie)地(di)體系，當體系中產(chan)(chan)生(sheng)單(dan)相接(jie)(jie)地(di)時，不會產(chan)(chan)生(sheng)很大(da)的(de)短路(lu)電(dian)流(liu)。毛(mao)病點電(dian)弧(hu)(hu)(hu)經(jing)過消(xiao)弧(hu)(hu)(hu)線圈(quan)補(bu)償感抗(kang)后(hou)能夠自(zi)(zi)行(xing)平息(xi)，熄(xi)弧(hu)(hu)(hu)后(hou)接(jie)(jie)地(di)址絕緣可(ke)自(zi)(zi)行(xing)康復，能主動(dong)鏟除單(dan)相接(jie)(jie)地(di)毛(mao)病。如(ru)果間(jian)歇性弧(hu)(hu)(hu)光不能平息(xi)，長(chang)時間(jian)帶電(dian)運轉(zhuan)會造(zao)成諧振過電(dian)壓(ya)，產(chan)(chan)生(sheng)幾倍于正常的(de)過電(dian)壓(ya)，過電(dian)壓(ya)將進(jin)一步使線路(lu)上的(de)絕緣層絕緣子(zi)擊(ji)穿，造(zao)成嚴(yan)峻的(de)相間(jian)短路(lu)事端。不管是哪種情況都須(xu)要對毛(mao)病點定(ding)位，隨后(hou)趕快組織維修毛(mao)病點。單(dan)相接(jie)(jie)地(di)毛(mao)病產(chan)(chan)生(sheng)后(hou)能維持運轉(zhuan)一定(ding)時間(jian)，因此(ci)大(da)大(da)提高了(le)供電(dian)牢靠(kao)性。

配電(dian)開關的一二(er)次(ci)成套(tao)設備的技能研(yan)發，是為了更(geng)好的標準配網(wang)主設備，保障建造過程中一二(er)次(ci)同步建造投運(yun)，防止(zhi)后(hou)期(qi)(qi)的改造，關于縮短施工期(qi)(qi)、提高牢靠性及運(yun)維功率、簡(jian)化(hua)投標流程等具有重要意義。