改進成套設備的(de)功(gong)能，添加單(dan)相(xiang)接(jie)地(di)(di)毛病就近檢測(ce)和阻隔，關于中性(xing)點(dian)不接(jie)地(di)(di)和經消(xiao)弧線(xian)圈接(jie)地(di)(di)毛病處理辦(ban)法也將是一項重(zhong)大的(de)技能革新。提(ti)升配網單(dan)相(xiang)接(jie)地(di)(di)毛病選線(xian)成功(gong)率、探索(suo)完善接(jie)地(di)(di)毛病阻隔技能。

現(xian)有(you)接地毛(mao)(mao)病(bing)選(xuan)(xuan)(xuan)線維護主要選(xuan)(xuan)(xuan)用中(zhong)性點(dian)經小(xiao)電(dian)(dian)阻接地辦法(fa)下(xia)的零(ling)序電(dian)(dian)流(liu)維護或中(zhong)性點(dian)非有(you)用接地辦法(fa)下(xia)的小(xiao)電(dian)(dian)流(liu)接地選(xuan)(xuan)(xuan)線維護，在(zai)面臨高阻、間歇性等毛(mao)(mao)病(bing)時，仍(reng)存在(zai)選(xuan)(xuan)(xuan)線準確率(lv)(lv)差，無(wu)法(fa)有(you)用阻隔(ge)毛(mao)(mao)病(bing)，存在(zai)巨大(da)隱患(huan)。當高阻接地到達1000歐姆(mu)以上時，設(she)備(bei)動作牢(lao)靠(kao)率(lv)(lv)80%；設(she)備(bei)動作后選(xuan)(xuan)(xuan)線準確率(lv)(lv)90%。毛(mao)(mao)病(bing)檢測精度差開關(guan)拒(ju)動誤動率(lv)(lv)高，導致配電(dian)(dian)網牢(lao)靠(kao)性下(xia)降。

從配電(dian)網(wang)(wang)規劃(hua)(hua)規劃(hua)(hua)下手合理(li)的(de)(de)(de)(de)選(xuan)(xuan)(xuan)擇中(zhong)性點接(jie)(jie)地(di)(di)(di)辦(ban)法(fa)，開展(zhan)高低(di)壓(ya)開關柜(ju)成(cheng)套設(she)備技能研究(jiu)，開展(zhan)小(xiao)電(dian)流(liu)(liu)接(jie)(jie)地(di)(di)(di)體系單(dan)(dan)相(xiang)(xiang)(xiang)接(jie)(jie)地(di)(di)(di)毛病(bing)(bing)(bing)選(xuan)(xuan)(xuan)線辦(ban)法(fa)的(de)(de)(de)(de)研究(jiu)，進一(yi)步提高單(dan)(dan)相(xiang)(xiang)(xiang)接(jie)(jie)地(di)(di)(di)毛病(bing)(bing)(bing)選(xuan)(xuan)(xuan)線的(de)(de)(de)(de)準確率。選(xuan)(xuan)(xuan)用(yong)小(xiao)電(dian)流(liu)(liu)接(jie)(jie)地(di)(di)(di)體系的(de)(de)(de)(de)區域要裝(zhuang)備接(jie)(jie)地(di)(di)(di)毛病(bing)(bing)(bing)線段判別與(yu)(yu)阻隔(ge)設(she)備。國家電(dian)網(wang)(wang)正在(zai)修訂的(de)(de)(de)(de)《配電(dian)網(wang)(wang)技能導則》規則變電(dian)站要安(an)裝(zhuang)牢靠的(de)(de)(de)(de)選(xuan)(xuan)(xuan)線設(she)備，在(zai)10s內(nei)切除的(de)(de)(de)(de)接(jie)(jie)地(di)(di)(di)毛病(bing)(bing)(bing)。在(zai)小(xiao)電(dian)流(liu)(liu)接(jie)(jie)地(di)(di)(di)配電(dian)網(wang)(wang)中(zhong)，消弧線圈將(jiang)接(jie)(jie)地(di)(di)(di)電(dian)流(liu)(liu)降至只有幾個安(an)培(pei)，盡管有利于熄弧，但也使毛病(bing)(bing)(bing)線路(lu)的(de)(de)(de)(de)工(gong)頻(pin)零序電(dian)流(liu)(liu)往往小(xiao)于非(fei)毛病(bing)(bing)(bing)線路(lu)的(de)(de)(de)(de)電(dian)流(liu)(liu)并且二者的(de)(de)(de)(de)相(xiang)(xiang)(xiang)位也根(gen)本相(xiang)(xiang)(xiang)同，毛病(bing)(bing)(bing)線路(lu)工(gong)頻(pin)零序電(dian)流(liu)(liu)沒有了(le)差(cha)異與(yu)(yu)非(fei)毛病(bing)(bing)(bing)線路(lu)的(de)(de)(de)(de)特征，這關于單(dan)(dan)相(xiang)(xiang)(xiang)接(jie)(jie)地(di)(di)(di)毛病(bing)(bing)(bing)檢測(ce)來說正確選(xuan)(xuan)(xuan)線是困難的(de)(de)(de)(de)。

10KV電(dian)(dian)(dian)力體(ti)(ti)系大(da)(da)多(duo)是小電(dian)(dian)(dian)流(liu)接(jie)(jie)(jie)(jie)地(di)體(ti)(ti)系，當體(ti)(ti)系中產(chan)生(sheng)(sheng)單(dan)相(xiang)(xiang)接(jie)(jie)(jie)(jie)地(di)時(shi)，不會產(chan)生(sheng)(sheng)很大(da)(da)的短路電(dian)(dian)(dian)流(liu)。毛病點(dian)(dian)電(dian)(dian)(dian)弧經過消弧線圈補(bu)償感抗后(hou)能夠自(zi)行平息(xi)，熄弧后(hou)接(jie)(jie)(jie)(jie)地(di)址絕緣可(ke)自(zi)行康復，能主動鏟除單(dan)相(xiang)(xiang)接(jie)(jie)(jie)(jie)地(di)毛病。如果(guo)間歇性弧光不能平息(xi)，長(chang)時(shi)間帶電(dian)(dian)(dian)運(yun)轉(zhuan)會造(zao)成(cheng)諧振(zhen)過電(dian)(dian)(dian)壓(ya)，產(chan)生(sheng)(sheng)幾(ji)倍(bei)于(yu)正常(chang)的過電(dian)(dian)(dian)壓(ya)，過電(dian)(dian)(dian)壓(ya)將進一(yi)步使線路上的絕緣層絕緣子擊穿，造(zao)成(cheng)嚴峻(jun)的相(xiang)(xiang)間短路事端。不管是哪種情(qing)況都須(xu)要對毛病點(dian)(dian)定位，隨(sui)后(hou)趕快組織維(wei)修毛病點(dian)(dian)。單(dan)相(xiang)(xiang)接(jie)(jie)(jie)(jie)地(di)毛病產(chan)生(sheng)(sheng)后(hou)能維(wei)持運(yun)轉(zhuan)一(yi)定時(shi)間，因(yin)此大(da)(da)大(da)(da)提高了供電(dian)(dian)(dian)牢靠性。

配電(dian)開(kai)關(guan)的(de)(de)一(yi)二(er)次成(cheng)套設備的(de)(de)技能研發，是為了更好的(de)(de)標(biao)準(zhun)配網主設備，保障(zhang)建(jian)造(zao)(zao)過程中一(yi)二(er)次同步建(jian)造(zao)(zao)投運，防止后期(qi)(qi)的(de)(de)改造(zao)(zao)，關(guan)于縮短施(shi)工期(qi)(qi)、提(ti)高牢靠性及運維功(gong)率、簡化投標(biao)流程等具(ju)有重要意義。