改進成(cheng)(cheng)套(tao)設備的(de)功能(neng)(neng)，添加(jia)單相接(jie)(jie)地(di)毛病(bing)就近(jin)檢測(ce)和阻隔，關于中性(xing)點不接(jie)(jie)地(di)和經消弧線(xian)圈接(jie)(jie)地(di)毛病(bing)處理(li)辦法也(ye)將(jiang)是一項重大的(de)技能(neng)(neng)革新。提(ti)升配網(wang)單相接(jie)(jie)地(di)毛病(bing)選線(xian)成(cheng)(cheng)功率、探索完善接(jie)(jie)地(di)毛病(bing)阻隔技能(neng)(neng)。

現有(you)接(jie)(jie)地(di)(di)毛(mao)(mao)病(bing)(bing)選(xuan)(xuan)線維護主要選(xuan)(xuan)用(yong)(yong)中性(xing)點(dian)經(jing)小電(dian)阻接(jie)(jie)地(di)(di)辦法下的(de)零序電(dian)流(liu)維護或中性(xing)點(dian)非有(you)用(yong)(yong)接(jie)(jie)地(di)(di)辦法下的(de)小電(dian)流(liu)接(jie)(jie)地(di)(di)選(xuan)(xuan)線維護，在(zai)面臨高(gao)阻、間歇性(xing)等毛(mao)(mao)病(bing)(bing)時，仍存(cun)在(zai)選(xuan)(xuan)線準(zhun)確率差，無(wu)法有(you)用(yong)(yong)阻隔毛(mao)(mao)病(bing)(bing)，存(cun)在(zai)巨(ju)大隱患。當(dang)高(gao)阻接(jie)(jie)地(di)(di)到達1000歐姆(mu)以上時，設備(bei)(bei)動(dong)作(zuo)牢靠率80%；設備(bei)(bei)動(dong)作(zuo)后(hou)選(xuan)(xuan)線準(zhun)確率90%。毛(mao)(mao)病(bing)(bing)檢(jian)測精度(du)差開關拒動(dong)誤動(dong)率高(gao)，導致配(pei)電(dian)網牢靠性(xing)下降。

從配(pei)(pei)電(dian)(dian)網(wang)(wang)(wang)規(gui)(gui)劃規(gui)(gui)劃下手(shou)合理的(de)(de)(de)(de)(de)選(xuan)(xuan)擇中性點接(jie)地(di)(di)辦法，開(kai)展(zhan)高低壓開(kai)關(guan)柜成套設(she)備技(ji)能研究(jiu)，開(kai)展(zhan)小(xiao)電(dian)(dian)流(liu)(liu)接(jie)地(di)(di)體系單(dan)(dan)相(xiang)(xiang)(xiang)接(jie)地(di)(di)毛(mao)(mao)(mao)病(bing)(bing)選(xuan)(xuan)線(xian)(xian)(xian)辦法的(de)(de)(de)(de)(de)研究(jiu)，進一步提(ti)高單(dan)(dan)相(xiang)(xiang)(xiang)接(jie)地(di)(di)毛(mao)(mao)(mao)病(bing)(bing)選(xuan)(xuan)線(xian)(xian)(xian)的(de)(de)(de)(de)(de)準確率(lv)。選(xuan)(xuan)用小(xiao)電(dian)(dian)流(liu)(liu)接(jie)地(di)(di)體系的(de)(de)(de)(de)(de)區域(yu)要裝備接(jie)地(di)(di)毛(mao)(mao)(mao)病(bing)(bing)線(xian)(xian)(xian)段判別與(yu)阻隔設(she)備。國家(jia)電(dian)(dian)網(wang)(wang)(wang)正在(zai)修訂的(de)(de)(de)(de)(de)《配(pei)(pei)電(dian)(dian)網(wang)(wang)(wang)技(ji)能導(dao)則》規(gui)(gui)則變電(dian)(dian)站要安裝牢(lao)靠(kao)的(de)(de)(de)(de)(de)選(xuan)(xuan)線(xian)(xian)(xian)設(she)備，在(zai)10s內切除的(de)(de)(de)(de)(de)接(jie)地(di)(di)毛(mao)(mao)(mao)病(bing)(bing)。在(zai)小(xiao)電(dian)(dian)流(liu)(liu)接(jie)地(di)(di)配(pei)(pei)電(dian)(dian)網(wang)(wang)(wang)中，消弧(hu)線(xian)(xian)(xian)圈將(jiang)接(jie)地(di)(di)電(dian)(dian)流(liu)(liu)降至只(zhi)有幾(ji)個(ge)安培，盡管有利于熄弧(hu)，但也使毛(mao)(mao)(mao)病(bing)(bing)線(xian)(xian)(xian)路(lu)(lu)的(de)(de)(de)(de)(de)工頻(pin)零(ling)序電(dian)(dian)流(liu)(liu)往(wang)(wang)往(wang)(wang)小(xiao)于非(fei)(fei)毛(mao)(mao)(mao)病(bing)(bing)線(xian)(xian)(xian)路(lu)(lu)的(de)(de)(de)(de)(de)電(dian)(dian)流(liu)(liu)并且二者的(de)(de)(de)(de)(de)相(xiang)(xiang)(xiang)位也根本(ben)相(xiang)(xiang)(xiang)同，毛(mao)(mao)(mao)病(bing)(bing)線(xian)(xian)(xian)路(lu)(lu)工頻(pin)零(ling)序電(dian)(dian)流(liu)(liu)沒有了(le)差異與(yu)非(fei)(fei)毛(mao)(mao)(mao)病(bing)(bing)線(xian)(xian)(xian)路(lu)(lu)的(de)(de)(de)(de)(de)特征，這關(guan)于單(dan)(dan)相(xiang)(xiang)(xiang)接(jie)地(di)(di)毛(mao)(mao)(mao)病(bing)(bing)檢(jian)測來(lai)說(shuo)正確選(xuan)(xuan)線(xian)(xian)(xian)是(shi)困(kun)難的(de)(de)(de)(de)(de)。

10KV電(dian)(dian)力體系(xi)大(da)多是小電(dian)(dian)流接(jie)(jie)地體系(xi)，當體系(xi)中產生(sheng)(sheng)單(dan)相接(jie)(jie)地時(shi)，不(bu)會產生(sheng)(sheng)很大(da)的(de)短路(lu)(lu)電(dian)(dian)流。毛(mao)病點電(dian)(dian)弧(hu)經過消弧(hu)線圈補償(chang)感抗后能(neng)夠自行(xing)(xing)平息(xi)，熄弧(hu)后接(jie)(jie)地址絕(jue)緣(yuan)可(ke)自行(xing)(xing)康復(fu)，能(neng)主動鏟除單(dan)相接(jie)(jie)地毛(mao)病。如(ru)果間歇(xie)性(xing)弧(hu)光不(bu)能(neng)平息(xi)，長時(shi)間帶電(dian)(dian)運轉會造成諧振過電(dian)(dian)壓(ya)，產生(sheng)(sheng)幾倍(bei)于正常的(de)過電(dian)(dian)壓(ya)，過電(dian)(dian)壓(ya)將(jiang)進(jin)一步使(shi)線路(lu)(lu)上的(de)絕(jue)緣(yuan)層絕(jue)緣(yuan)子(zi)擊穿，造成嚴(yan)峻的(de)相間短路(lu)(lu)事端。不(bu)管是哪種情(qing)況都須要對毛(mao)病點定位(wei)，隨(sui)后趕快(kuai)組(zu)織(zhi)維(wei)修毛(mao)病點。單(dan)相接(jie)(jie)地毛(mao)病產生(sheng)(sheng)后能(neng)維(wei)持運轉一定時(shi)間，因此大(da)大(da)提高(gao)了供電(dian)(dian)牢靠性(xing)。

配(pei)電開關的(de)一二(er)次(ci)成套設備的(de)技(ji)能研發，是為了更好(hao)的(de)標準配(pei)網主設備，保(bao)障建造(zao)(zao)過(guo)程中一二(er)次(ci)同步建造(zao)(zao)投運(yun)，防止后期(qi)的(de)改造(zao)(zao)，關于縮短施工期(qi)、提高(gao)牢靠性及運(yun)維功率(lv)、簡化投標流程等具有重要意義。