改進成(cheng)套(tao)設(she)備的(de)功(gong)能，添加單相(xiang)接地毛(mao)(mao)病(bing)就近檢測和(he)阻(zu)隔，關于中性點(dian)不接地和(he)經消(xiao)弧線圈接地毛(mao)(mao)病(bing)處理辦法也將是一項重大的(de)技能革新。提升配網單相(xiang)接地毛(mao)(mao)病(bing)選線成(cheng)功(gong)率、探(tan)索完善(shan)接地毛(mao)(mao)病(bing)阻(zu)隔技能。

現有接地(di)(di)(di)(di)毛(mao)(mao)病選(xuan)線(xian)維(wei)護主要(yao)選(xuan)用中性點經小電阻接地(di)(di)(di)(di)辦(ban)法(fa)下的(de)零序電流維(wei)護或(huo)中性點非有用接地(di)(di)(di)(di)辦(ban)法(fa)下的(de)小電流接地(di)(di)(di)(di)選(xuan)線(xian)維(wei)護，在面臨(lin)高阻、間歇性等毛(mao)(mao)病時，仍存在選(xuan)線(xian)準(zhun)確率差(cha)，無法(fa)有用阻隔毛(mao)(mao)病，存在巨大隱患(huan)。當高阻接地(di)(di)(di)(di)到(dao)達(da)1000歐(ou)姆以(yi)上時，設(she)備動作牢靠率80%；設(she)備動作后(hou)選(xuan)線(xian)準(zhun)確率90%。毛(mao)(mao)病檢(jian)測精度差(cha)開關拒動誤(wu)動率高，導致配電網牢靠性下降。

從(cong)配電(dian)(dian)(dian)網規(gui)(gui)劃(hua)規(gui)(gui)劃(hua)下手合理(li)的(de)(de)(de)(de)選(xuan)擇中性點接地(di)(di)辦(ban)法，開展高低壓開關柜成套(tao)設(she)備(bei)(bei)技能研(yan)究，開展小(xiao)電(dian)(dian)(dian)流(liu)(liu)接地(di)(di)體(ti)系單(dan)相接地(di)(di)毛(mao)病(bing)(bing)(bing)選(xuan)線(xian)(xian)辦(ban)法的(de)(de)(de)(de)研(yan)究，進(jin)一(yi)步提高單(dan)相接地(di)(di)毛(mao)病(bing)(bing)(bing)選(xuan)線(xian)(xian)的(de)(de)(de)(de)準確率。選(xuan)用小(xiao)電(dian)(dian)(dian)流(liu)(liu)接地(di)(di)體(ti)系的(de)(de)(de)(de)區域要裝備(bei)(bei)接地(di)(di)毛(mao)病(bing)(bing)(bing)線(xian)(xian)段(duan)判別與阻隔設(she)備(bei)(bei)。國家電(dian)(dian)(dian)網正(zheng)(zheng)在修訂(ding)的(de)(de)(de)(de)《配電(dian)(dian)(dian)網技能導則》規(gui)(gui)則變電(dian)(dian)(dian)站要安(an)裝牢靠的(de)(de)(de)(de)選(xuan)線(xian)(xian)設(she)備(bei)(bei)，在10s內切除的(de)(de)(de)(de)接地(di)(di)毛(mao)病(bing)(bing)(bing)。在小(xiao)電(dian)(dian)(dian)流(liu)(liu)接地(di)(di)配電(dian)(dian)(dian)網中，消弧線(xian)(xian)圈(quan)將接地(di)(di)電(dian)(dian)(dian)流(liu)(liu)降至(zhi)只有幾個(ge)安(an)培，盡管(guan)有利于(yu)熄(xi)弧，但也使毛(mao)病(bing)(bing)(bing)線(xian)(xian)路的(de)(de)(de)(de)工頻(pin)零序電(dian)(dian)(dian)流(liu)(liu)往往小(xiao)于(yu)非毛(mao)病(bing)(bing)(bing)線(xian)(xian)路的(de)(de)(de)(de)電(dian)(dian)(dian)流(liu)(liu)并且(qie)二(er)者的(de)(de)(de)(de)相位也根本相同(tong)，毛(mao)病(bing)(bing)(bing)線(xian)(xian)路工頻(pin)零序電(dian)(dian)(dian)流(liu)(liu)沒有了差異與非毛(mao)病(bing)(bing)(bing)線(xian)(xian)路的(de)(de)(de)(de)特征，這(zhe)關于(yu)單(dan)相接地(di)(di)毛(mao)病(bing)(bing)(bing)檢測來說正(zheng)(zheng)確選(xuan)線(xian)(xian)是困難的(de)(de)(de)(de)。

10KV電(dian)力體(ti)系大(da)多(duo)是(shi)(shi)小電(dian)流(liu)(liu)接(jie)地(di)體(ti)系，當體(ti)系中產(chan)生單(dan)相(xiang)接(jie)地(di)時，不(bu)會(hui)產(chan)生很大(da)的(de)(de)(de)短(duan)路(lu)電(dian)流(liu)(liu)。毛病(bing)點電(dian)弧(hu)經過消(xiao)弧(hu)線圈補(bu)償感抗后(hou)能夠自行(xing)平(ping)(ping)息，熄弧(hu)后(hou)接(jie)地(di)址絕(jue)緣可(ke)自行(xing)康復，能主動鏟除單(dan)相(xiang)接(jie)地(di)毛病(bing)。如果(guo)間歇性弧(hu)光不(bu)能平(ping)(ping)息，長時間帶電(dian)運轉(zhuan)會(hui)造(zao)成(cheng)諧(xie)振過電(dian)壓，產(chan)生幾倍(bei)于正常的(de)(de)(de)過電(dian)壓，過電(dian)壓將進(jin)一步使線路(lu)上的(de)(de)(de)絕(jue)緣層絕(jue)緣子擊穿，造(zao)成(cheng)嚴峻的(de)(de)(de)相(xiang)間短(duan)路(lu)事端(duan)。不(bu)管是(shi)(shi)哪種情況都須要對毛病(bing)點定位，隨后(hou)趕快組織維修毛病(bing)點。單(dan)相(xiang)接(jie)地(di)毛病(bing)產(chan)生后(hou)能維持(chi)運轉(zhuan)一定時間，因此大(da)大(da)提(ti)高了(le)供電(dian)牢靠性。

配(pei)電開關的一二(er)次成套(tao)設備(bei)的技能研發，是為了更好(hao)的標(biao)準配(pei)網主設備(bei)，保障建(jian)造(zao)(zao)過(guo)程(cheng)中(zhong)一二(er)次同步建(jian)造(zao)(zao)投(tou)運，防止后期的改造(zao)(zao)，關于縮短(duan)施工期、提高牢靠性及運維功率、簡化(hua)投(tou)標(biao)流程(cheng)等具有重要意義(yi)。