改進(jin)成(cheng)套設(she)備的功能，添加單(dan)(dan)相(xiang)接(jie)(jie)地(di)(di)毛(mao)(mao)病就近檢測和(he)阻隔，關于中性點不接(jie)(jie)地(di)(di)和(he)經(jing)消弧(hu)線圈接(jie)(jie)地(di)(di)毛(mao)(mao)病處理(li)辦法也將是一項重大的技能革新。提升配(pei)網(wang)單(dan)(dan)相(xiang)接(jie)(jie)地(di)(di)毛(mao)(mao)病選(xuan)線成(cheng)功率、探索(suo)完善接(jie)(jie)地(di)(di)毛(mao)(mao)病阻隔技能。

現(xian)有接地毛(mao)(mao)病(bing)(bing)選(xuan)(xuan)線(xian)維(wei)護主(zhu)要(yao)選(xuan)(xuan)用(yong)中性點(dian)經小電(dian)阻(zu)接地辦(ban)法下的零(ling)序電(dian)流維(wei)護或(huo)中性點(dian)非有用(yong)接地辦(ban)法下的小電(dian)流接地選(xuan)(xuan)線(xian)維(wei)護，在(zai)(zai)(zai)面臨高阻(zu)、間歇性等毛(mao)(mao)病(bing)(bing)時，仍(reng)存(cun)在(zai)(zai)(zai)選(xuan)(xuan)線(xian)準確率差(cha)，無法有用(yong)阻(zu)隔毛(mao)(mao)病(bing)(bing)，存(cun)在(zai)(zai)(zai)巨大隱患。當高阻(zu)接地到(dao)達1000歐姆以上時，設(she)備動作(zuo)牢靠率80%；設(she)備動作(zuo)后(hou)選(xuan)(xuan)線(xian)準確率90%。毛(mao)(mao)病(bing)(bing)檢測精度差(cha)開關拒(ju)動誤動率高，導致配電(dian)網牢靠性下降。

從配電(dian)網規(gui)劃規(gui)劃下手(shou)合理的(de)(de)(de)(de)選擇(ze)中(zhong)性點(dian)接(jie)地(di)(di)辦(ban)法，開(kai)展高低壓開(kai)關柜成套設備(bei)技能研究(jiu)，開(kai)展小電(dian)流(liu)(liu)接(jie)地(di)(di)體系單相(xiang)(xiang)接(jie)地(di)(di)毛(mao)(mao)(mao)(mao)病(bing)選線(xian)(xian)(xian)(xian)(xian)辦(ban)法的(de)(de)(de)(de)研究(jiu)，進(jin)一步提高單相(xiang)(xiang)接(jie)地(di)(di)毛(mao)(mao)(mao)(mao)病(bing)選線(xian)(xian)(xian)(xian)(xian)的(de)(de)(de)(de)準(zhun)確率。選用小電(dian)流(liu)(liu)接(jie)地(di)(di)體系的(de)(de)(de)(de)區域(yu)要裝(zhuang)備(bei)接(jie)地(di)(di)毛(mao)(mao)(mao)(mao)病(bing)線(xian)(xian)(xian)(xian)(xian)段判別與阻隔(ge)設備(bei)。國(guo)家電(dian)網正(zheng)(zheng)在修訂的(de)(de)(de)(de)《配電(dian)網技能導(dao)則(ze)》規(gui)則(ze)變電(dian)站要安裝(zhuang)牢靠的(de)(de)(de)(de)選線(xian)(xian)(xian)(xian)(xian)設備(bei)，在10s內切除的(de)(de)(de)(de)接(jie)地(di)(di)毛(mao)(mao)(mao)(mao)病(bing)。在小電(dian)流(liu)(liu)接(jie)地(di)(di)配電(dian)網中(zhong)，消弧線(xian)(xian)(xian)(xian)(xian)圈(quan)將接(jie)地(di)(di)電(dian)流(liu)(liu)降(jiang)至(zhi)只有幾個安培，盡管有利于熄弧，但也使毛(mao)(mao)(mao)(mao)病(bing)線(xian)(xian)(xian)(xian)(xian)路(lu)的(de)(de)(de)(de)工頻(pin)零(ling)序電(dian)流(liu)(liu)往(wang)往(wang)小于非毛(mao)(mao)(mao)(mao)病(bing)線(xian)(xian)(xian)(xian)(xian)路(lu)的(de)(de)(de)(de)電(dian)流(liu)(liu)并且二(er)者的(de)(de)(de)(de)相(xiang)(xiang)位也根本(ben)相(xiang)(xiang)同，毛(mao)(mao)(mao)(mao)病(bing)線(xian)(xian)(xian)(xian)(xian)路(lu)工頻(pin)零(ling)序電(dian)流(liu)(liu)沒有了(le)差異與非毛(mao)(mao)(mao)(mao)病(bing)線(xian)(xian)(xian)(xian)(xian)路(lu)的(de)(de)(de)(de)特征，這關于單相(xiang)(xiang)接(jie)地(di)(di)毛(mao)(mao)(mao)(mao)病(bing)檢(jian)測來說(shuo)正(zheng)(zheng)確選線(xian)(xian)(xian)(xian)(xian)是困難(nan)的(de)(de)(de)(de)。

10KV電(dian)(dian)(dian)(dian)力體系大(da)多是小電(dian)(dian)(dian)(dian)流接(jie)(jie)地(di)體系，當體系中產(chan)生(sheng)單(dan)相接(jie)(jie)地(di)時，不會(hui)產(chan)生(sheng)很大(da)的短(duan)路(lu)電(dian)(dian)(dian)(dian)流。毛(mao)(mao)病(bing)點電(dian)(dian)(dian)(dian)弧(hu)經過(guo)(guo)消弧(hu)線圈補償感抗后(hou)能(neng)夠自行平息(xi)，熄弧(hu)后(hou)接(jie)(jie)地(di)址絕緣(yuan)可自行康復，能(neng)主動鏟除單(dan)相接(jie)(jie)地(di)毛(mao)(mao)病(bing)。如(ru)果間歇性(xing)(xing)弧(hu)光不能(neng)平息(xi)，長(chang)時間帶電(dian)(dian)(dian)(dian)運轉會(hui)造成諧振過(guo)(guo)電(dian)(dian)(dian)(dian)壓(ya)，產(chan)生(sheng)幾倍于正常的過(guo)(guo)電(dian)(dian)(dian)(dian)壓(ya)，過(guo)(guo)電(dian)(dian)(dian)(dian)壓(ya)將進一步使線路(lu)上的絕緣(yuan)層絕緣(yuan)子擊穿，造成嚴峻(jun)的相間短(duan)路(lu)事端(duan)。不管是哪種情況都須(xu)要對毛(mao)(mao)病(bing)點定位，隨后(hou)趕快組(zu)織(zhi)維(wei)修毛(mao)(mao)病(bing)點。單(dan)相接(jie)(jie)地(di)毛(mao)(mao)病(bing)產(chan)生(sheng)后(hou)能(neng)維(wei)持(chi)運轉一定時間，因此(ci)大(da)大(da)提高了供電(dian)(dian)(dian)(dian)牢(lao)靠(kao)性(xing)(xing)。

配(pei)電開關的一(yi)二次成套(tao)設備的技能(neng)研發，是(shi)為了更好的標(biao)準配(pei)網主設備，保障建造過程(cheng)中一(yi)二次同(tong)步建造投運，防(fang)止(zhi)后(hou)期(qi)的改造，關于縮短施工期(qi)、提高(gao)牢靠性(xing)及運維功率、簡化投標(biao)流程(cheng)等(deng)具有重要意義(yi)。