改進成套設備的(de)(de)功(gong)能(neng)，添加(jia)單相接(jie)地(di)(di)毛(mao)病就近檢測和(he)阻隔，關于中性點不接(jie)地(di)(di)和(he)經消弧(hu)線圈接(jie)地(di)(di)毛(mao)病處理辦法也(ye)將是(shi)一項重大的(de)(de)技(ji)能(neng)革新。提升配網單相接(jie)地(di)(di)毛(mao)病選線成功(gong)率(lv)、探索完善接(jie)地(di)(di)毛(mao)病阻隔技(ji)能(neng)。

現有接(jie)(jie)地毛(mao)病(bing)選(xuan)線(xian)(xian)維護(hu)(hu)主要選(xuan)用(yong)中性點經小電(dian)阻接(jie)(jie)地辦法(fa)下(xia)的零序電(dian)流維護(hu)(hu)或中性點非有用(yong)接(jie)(jie)地辦法(fa)下(xia)的小電(dian)流接(jie)(jie)地選(xuan)線(xian)(xian)維護(hu)(hu)，在(zai)(zai)面臨高(gao)阻、間歇(xie)性等毛(mao)病(bing)時，仍存在(zai)(zai)選(xuan)線(xian)(xian)準(zhun)確率差，無法(fa)有用(yong)阻隔毛(mao)病(bing)，存在(zai)(zai)巨大隱患。當高(gao)阻接(jie)(jie)地到(dao)達(da)1000歐姆以上時，設(she)備動作牢(lao)靠率80%；設(she)備動作后選(xuan)線(xian)(xian)準(zhun)確率90%。毛(mao)病(bing)檢測精(jing)度(du)差開關拒(ju)動誤(wu)動率高(gao)，導(dao)致配電(dian)網(wang)牢(lao)靠性下(xia)降。

從配(pei)電(dian)(dian)(dian)網(wang)(wang)規劃規劃下手合理的(de)(de)選(xuan)(xuan)擇中性點接(jie)(jie)地(di)辦(ban)法(fa)，開(kai)展高(gao)低壓開(kai)關柜(ju)成套設備(bei)技能研究(jiu)，開(kai)展小(xiao)電(dian)(dian)(dian)流(liu)(liu)接(jie)(jie)地(di)體系單(dan)相接(jie)(jie)地(di)毛(mao)(mao)病(bing)選(xuan)(xuan)線(xian)(xian)辦(ban)法(fa)的(de)(de)研究(jiu)，進一步(bu)提高(gao)單(dan)相接(jie)(jie)地(di)毛(mao)(mao)病(bing)選(xuan)(xuan)線(xian)(xian)的(de)(de)準確(que)率。選(xuan)(xuan)用(yong)小(xiao)電(dian)(dian)(dian)流(liu)(liu)接(jie)(jie)地(di)體系的(de)(de)區(qu)域要(yao)裝備(bei)接(jie)(jie)地(di)毛(mao)(mao)病(bing)線(xian)(xian)段判別與阻隔設備(bei)。國家(jia)電(dian)(dian)(dian)網(wang)(wang)正在修(xiu)訂的(de)(de)《配(pei)電(dian)(dian)(dian)網(wang)(wang)技能導則》規則變電(dian)(dian)(dian)站要(yao)安裝牢靠的(de)(de)選(xuan)(xuan)線(xian)(xian)設備(bei)，在10s內(nei)切除的(de)(de)接(jie)(jie)地(di)毛(mao)(mao)病(bing)。在小(xiao)電(dian)(dian)(dian)流(liu)(liu)接(jie)(jie)地(di)配(pei)電(dian)(dian)(dian)網(wang)(wang)中，消(xiao)弧(hu)(hu)線(xian)(xian)圈(quan)將(jiang)接(jie)(jie)地(di)電(dian)(dian)(dian)流(liu)(liu)降至只有(you)幾個安培(pei)，盡管(guan)有(you)利于熄(xi)弧(hu)(hu)，但也使毛(mao)(mao)病(bing)線(xian)(xian)路的(de)(de)工(gong)頻(pin)零序電(dian)(dian)(dian)流(liu)(liu)往(wang)往(wang)小(xiao)于非毛(mao)(mao)病(bing)線(xian)(xian)路的(de)(de)電(dian)(dian)(dian)流(liu)(liu)并且二者的(de)(de)相位也根本相同，毛(mao)(mao)病(bing)線(xian)(xian)路工(gong)頻(pin)零序電(dian)(dian)(dian)流(liu)(liu)沒有(you)了差異與非毛(mao)(mao)病(bing)線(xian)(xian)路的(de)(de)特征，這關于單(dan)相接(jie)(jie)地(di)毛(mao)(mao)病(bing)檢測來說正確(que)選(xuan)(xuan)線(xian)(xian)是困難的(de)(de)。

10KV電(dian)(dian)(dian)力(li)體(ti)系大(da)(da)多是小電(dian)(dian)(dian)流接(jie)(jie)地(di)(di)體(ti)系，當(dang)體(ti)系中(zhong)產(chan)(chan)生(sheng)(sheng)單(dan)(dan)相(xiang)接(jie)(jie)地(di)(di)時，不(bu)會(hui)(hui)產(chan)(chan)生(sheng)(sheng)很大(da)(da)的短(duan)路(lu)(lu)電(dian)(dian)(dian)流。毛(mao)病點電(dian)(dian)(dian)弧(hu)(hu)經過消弧(hu)(hu)線圈補償感抗后能(neng)夠自(zi)行(xing)平息(xi)，熄弧(hu)(hu)后接(jie)(jie)地(di)(di)址絕(jue)(jue)緣(yuan)可(ke)自(zi)行(xing)康(kang)復(fu)，能(neng)主動鏟除(chu)單(dan)(dan)相(xiang)接(jie)(jie)地(di)(di)毛(mao)病。如果間(jian)(jian)歇性弧(hu)(hu)光不(bu)能(neng)平息(xi)，長時間(jian)(jian)帶電(dian)(dian)(dian)運轉(zhuan)會(hui)(hui)造(zao)(zao)成諧振過電(dian)(dian)(dian)壓(ya)，產(chan)(chan)生(sheng)(sheng)幾倍于正常的過電(dian)(dian)(dian)壓(ya)，過電(dian)(dian)(dian)壓(ya)將進一(yi)步使線路(lu)(lu)上的絕(jue)(jue)緣(yuan)層絕(jue)(jue)緣(yuan)子擊穿，造(zao)(zao)成嚴峻的相(xiang)間(jian)(jian)短(duan)路(lu)(lu)事端。不(bu)管是哪(na)種情(qing)況都須要對(dui)毛(mao)病點定位(wei)，隨(sui)后趕快組織維修毛(mao)病點。單(dan)(dan)相(xiang)接(jie)(jie)地(di)(di)毛(mao)病產(chan)(chan)生(sheng)(sheng)后能(neng)維持(chi)運轉(zhuan)一(yi)定時間(jian)(jian)，因此大(da)(da)大(da)(da)提高了(le)供(gong)電(dian)(dian)(dian)牢靠性。

配電開關的(de)一二次成套設備的(de)技能(neng)研發，是(shi)為了更好(hao)的(de)標準配網主設備，保障建(jian)(jian)造(zao)過程(cheng)中一二次同(tong)步建(jian)(jian)造(zao)投運，防(fang)止后期的(de)改造(zao)，關于縮短施(shi)工(gong)期、提高牢靠(kao)性(xing)及運維功率、簡(jian)化投標流程(cheng)等(deng)具有重要意義。