改(gai)進成套設備的(de)(de)功能(neng)(neng)，添加(jia)單相(xiang)接(jie)(jie)地(di)(di)(di)毛(mao)病就近檢(jian)測和阻隔(ge)，關(guan)于中(zhong)性點不接(jie)(jie)地(di)(di)(di)和經(jing)消弧線圈接(jie)(jie)地(di)(di)(di)毛(mao)病處(chu)理辦(ban)法(fa)也(ye)將是一項(xiang)重大的(de)(de)技(ji)能(neng)(neng)革(ge)新。提升(sheng)配網單相(xiang)接(jie)(jie)地(di)(di)(di)毛(mao)病選線成功率、探索完善接(jie)(jie)地(di)(di)(di)毛(mao)病阻隔(ge)技(ji)能(neng)(neng)。

現有(you)接(jie)(jie)地(di)(di)(di)毛病選(xuan)(xuan)線(xian)維(wei)護(hu)主要選(xuan)(xuan)用(yong)中(zhong)(zhong)性點(dian)經小電阻接(jie)(jie)地(di)(di)(di)辦法下(xia)的零序電流維(wei)護(hu)或中(zhong)(zhong)性點(dian)非有(you)用(yong)接(jie)(jie)地(di)(di)(di)辦法下(xia)的小電流接(jie)(jie)地(di)(di)(di)選(xuan)(xuan)線(xian)維(wei)護(hu)，在面臨高阻、間歇性等(deng)毛病時(shi)，仍存在選(xuan)(xuan)線(xian)準確率差，無法有(you)用(yong)阻隔(ge)毛病，存在巨大(da)隱患。當高阻接(jie)(jie)地(di)(di)(di)到達(da)1000歐姆以上時(shi)，設備動作牢(lao)靠率80%；設備動作后選(xuan)(xuan)線(xian)準確率90%。毛病檢測(ce)精(jing)度差開關拒動誤動率高，導致配電網牢(lao)靠性下(xia)降。

從(cong)配電(dian)(dian)(dian)(dian)網(wang)(wang)規(gui)劃規(gui)劃下(xia)手合理(li)的(de)(de)選(xuan)(xuan)(xuan)擇中性(xing)點(dian)接(jie)地(di)(di)(di)(di)(di)辦(ban)法，開(kai)展高低壓開(kai)關柜成套(tao)設(she)(she)備技(ji)能研(yan)究，開(kai)展小電(dian)(dian)(dian)(dian)流(liu)接(jie)地(di)(di)(di)(di)(di)體系(xi)單(dan)相(xiang)(xiang)接(jie)地(di)(di)(di)(di)(di)毛(mao)(mao)病(bing)選(xuan)(xuan)(xuan)線(xian)(xian)辦(ban)法的(de)(de)研(yan)究，進一(yi)步提高單(dan)相(xiang)(xiang)接(jie)地(di)(di)(di)(di)(di)毛(mao)(mao)病(bing)選(xuan)(xuan)(xuan)線(xian)(xian)的(de)(de)準確率。選(xuan)(xuan)(xuan)用小電(dian)(dian)(dian)(dian)流(liu)接(jie)地(di)(di)(di)(di)(di)體系(xi)的(de)(de)區(qu)域要裝備接(jie)地(di)(di)(di)(di)(di)毛(mao)(mao)病(bing)線(xian)(xian)段判(pan)別與(yu)阻隔設(she)(she)備。國(guo)家(jia)電(dian)(dian)(dian)(dian)網(wang)(wang)正在(zai)修訂的(de)(de)《配電(dian)(dian)(dian)(dian)網(wang)(wang)技(ji)能導則(ze)》規(gui)則(ze)變電(dian)(dian)(dian)(dian)站(zhan)要安裝牢靠的(de)(de)選(xuan)(xuan)(xuan)線(xian)(xian)設(she)(she)備，在(zai)10s內切(qie)除(chu)的(de)(de)接(jie)地(di)(di)(di)(di)(di)毛(mao)(mao)病(bing)。在(zai)小電(dian)(dian)(dian)(dian)流(liu)接(jie)地(di)(di)(di)(di)(di)配電(dian)(dian)(dian)(dian)網(wang)(wang)中，消弧(hu)線(xian)(xian)圈將接(jie)地(di)(di)(di)(di)(di)電(dian)(dian)(dian)(dian)流(liu)降至只有幾個安培，盡管有利于熄弧(hu)，但(dan)也使毛(mao)(mao)病(bing)線(xian)(xian)路的(de)(de)工頻零(ling)序電(dian)(dian)(dian)(dian)流(liu)往(wang)往(wang)小于非毛(mao)(mao)病(bing)線(xian)(xian)路的(de)(de)電(dian)(dian)(dian)(dian)流(liu)并且二者的(de)(de)相(xiang)(xiang)位也根(gen)本相(xiang)(xiang)同，毛(mao)(mao)病(bing)線(xian)(xian)路工頻零(ling)序電(dian)(dian)(dian)(dian)流(liu)沒有了差(cha)異(yi)與(yu)非毛(mao)(mao)病(bing)線(xian)(xian)路的(de)(de)特(te)征，這關于單(dan)相(xiang)(xiang)接(jie)地(di)(di)(di)(di)(di)毛(mao)(mao)病(bing)檢(jian)測來說正確選(xuan)(xuan)(xuan)線(xian)(xian)是(shi)困(kun)難的(de)(de)。

10KV電(dian)(dian)力體系(xi)大多是(shi)小電(dian)(dian)流(liu)接(jie)地(di)體系(xi)，當體系(xi)中產生(sheng)單(dan)相(xiang)接(jie)地(di)時，不會產生(sheng)很大的短路電(dian)(dian)流(liu)。毛(mao)(mao)病點(dian)電(dian)(dian)弧(hu)經過消(xiao)弧(hu)線圈補償(chang)感(gan)抗后能夠自行(xing)平(ping)息，熄弧(hu)后接(jie)地(di)址絕(jue)緣可自行(xing)康復，能主動鏟除單(dan)相(xiang)接(jie)地(di)毛(mao)(mao)病。如果間(jian)歇(xie)性(xing)弧(hu)光不能平(ping)息，長時間(jian)帶電(dian)(dian)運轉會造成諧振過電(dian)(dian)壓(ya)，產生(sheng)幾倍于正常的過電(dian)(dian)壓(ya)，過電(dian)(dian)壓(ya)將進一步使線路上(shang)的絕(jue)緣層(ceng)絕(jue)緣子擊穿(chuan)，造成嚴峻的相(xiang)間(jian)短路事端。不管是(shi)哪種(zhong)情況都須(xu)要(yao)對(dui)毛(mao)(mao)病點(dian)定位，隨后趕快組(zu)織維(wei)修毛(mao)(mao)病點(dian)。單(dan)相(xiang)接(jie)地(di)毛(mao)(mao)病產生(sheng)后能維(wei)持(chi)運轉一定時間(jian)，因此(ci)大大提高了(le)供電(dian)(dian)牢(lao)靠性(xing)。

配(pei)(pei)電開關的(de)一二(er)次(ci)成套設(she)備的(de)技能研發，是為了更(geng)好的(de)標準配(pei)(pei)網(wang)主設(she)備，保障建造過程(cheng)中一二(er)次(ci)同步(bu)建造投運(yun)，防止(zhi)后(hou)期的(de)改造，關于(yu)縮短施工期、提高牢靠性及(ji)運(yun)維(wei)功率、簡化(hua)投標流(liu)程(cheng)等(deng)具有(you)重要意(yi)義。