改進成套設備的功能，添加單相接(jie)地毛(mao)病(bing)就近(jin)檢(jian)測和阻隔，關于(yu)中(zhong)性點不接(jie)地和經消弧線圈接(jie)地毛(mao)病(bing)處(chu)理(li)辦法也將是一項重大的技能革新(xin)。提升配網單相接(jie)地毛(mao)病(bing)選線成功率、探索完善接(jie)地毛(mao)病(bing)阻隔技能。

現有(you)(you)接(jie)(jie)(jie)地毛(mao)病選線(xian)(xian)維護(hu)主要選用中(zhong)性(xing)(xing)點經小電(dian)阻(zu)接(jie)(jie)(jie)地辦法(fa)(fa)下的零序電(dian)流(liu)(liu)維護(hu)或中(zhong)性(xing)(xing)點非有(you)(you)用接(jie)(jie)(jie)地辦法(fa)(fa)下的小電(dian)流(liu)(liu)接(jie)(jie)(jie)地選線(xian)(xian)維護(hu)，在(zai)面臨高(gao)(gao)阻(zu)、間歇性(xing)(xing)等毛(mao)病時(shi)，仍存(cun)在(zai)選線(xian)(xian)準(zhun)確率(lv)(lv)差，無法(fa)(fa)有(you)(you)用阻(zu)隔毛(mao)病，存(cun)在(zai)巨大(da)隱患(huan)。當高(gao)(gao)阻(zu)接(jie)(jie)(jie)地到達1000歐姆以上時(shi)，設備(bei)動(dong)(dong)(dong)作牢(lao)靠率(lv)(lv)80%；設備(bei)動(dong)(dong)(dong)作后選線(xian)(xian)準(zhun)確率(lv)(lv)90%。毛(mao)病檢(jian)測精(jing)度差開(kai)關拒動(dong)(dong)(dong)誤(wu)動(dong)(dong)(dong)率(lv)(lv)高(gao)(gao)，導(dao)致配電(dian)網牢(lao)靠性(xing)(xing)下降。

從配(pei)電(dian)(dian)(dian)(dian)網(wang)(wang)(wang)規(gui)(gui)劃(hua)規(gui)(gui)劃(hua)下手合(he)理的(de)選(xuan)擇中性點接(jie)(jie)地(di)辦(ban)法，開展高(gao)低(di)壓開關柜成套設(she)備技(ji)能(neng)研(yan)究(jiu)(jiu)，開展小電(dian)(dian)(dian)(dian)流接(jie)(jie)地(di)體系單(dan)(dan)相(xiang)接(jie)(jie)地(di)毛(mao)(mao)病選(xuan)線(xian)(xian)辦(ban)法的(de)研(yan)究(jiu)(jiu)，進一步提(ti)高(gao)單(dan)(dan)相(xiang)接(jie)(jie)地(di)毛(mao)(mao)病選(xuan)線(xian)(xian)的(de)準(zhun)確(que)率。選(xuan)用(yong)小電(dian)(dian)(dian)(dian)流接(jie)(jie)地(di)體系的(de)區域要裝備接(jie)(jie)地(di)毛(mao)(mao)病線(xian)(xian)段(duan)判別(bie)與(yu)阻隔設(she)備。國(guo)家(jia)電(dian)(dian)(dian)(dian)網(wang)(wang)(wang)正(zheng)(zheng)在(zai)(zai)修訂(ding)的(de)《配(pei)電(dian)(dian)(dian)(dian)網(wang)(wang)(wang)技(ji)能(neng)導則》規(gui)(gui)則變(bian)電(dian)(dian)(dian)(dian)站要安裝牢(lao)靠的(de)選(xuan)線(xian)(xian)設(she)備，在(zai)(zai)10s內切(qie)除的(de)接(jie)(jie)地(di)毛(mao)(mao)病。在(zai)(zai)小電(dian)(dian)(dian)(dian)流接(jie)(jie)地(di)配(pei)電(dian)(dian)(dian)(dian)網(wang)(wang)(wang)中，消(xiao)弧(hu)線(xian)(xian)圈將接(jie)(jie)地(di)電(dian)(dian)(dian)(dian)流降至只(zhi)有幾個安培，盡管有利于(yu)熄弧(hu)，但也(ye)使(shi)毛(mao)(mao)病線(xian)(xian)路的(de)工頻零序(xu)電(dian)(dian)(dian)(dian)流往往小于(yu)非(fei)毛(mao)(mao)病線(xian)(xian)路的(de)電(dian)(dian)(dian)(dian)流并(bing)且二者的(de)相(xiang)位也(ye)根(gen)本相(xiang)同，毛(mao)(mao)病線(xian)(xian)路工頻零序(xu)電(dian)(dian)(dian)(dian)流沒有了差(cha)異與(yu)非(fei)毛(mao)(mao)病線(xian)(xian)路的(de)特(te)征，這關于(yu)單(dan)(dan)相(xiang)接(jie)(jie)地(di)毛(mao)(mao)病檢(jian)測來說正(zheng)(zheng)確(que)選(xuan)線(xian)(xian)是困難的(de)。

10KV電(dian)(dian)力體(ti)系(xi)(xi)大(da)多是(shi)小(xiao)電(dian)(dian)流接地體(ti)系(xi)(xi)，當體(ti)系(xi)(xi)中產(chan)生(sheng)(sheng)單(dan)相(xiang)接地時(shi)，不會(hui)產(chan)生(sheng)(sheng)很大(da)的短路電(dian)(dian)流。毛(mao)病(bing)點電(dian)(dian)弧經過(guo)消弧線圈補償感(gan)抗后能(neng)夠(gou)自行平息，熄弧后接地址(zhi)絕(jue)緣(yuan)(yuan)可自行康復，能(neng)主(zhu)動(dong)鏟除單(dan)相(xiang)接地毛(mao)病(bing)。如果間歇性(xing)弧光不能(neng)平息，長時(shi)間帶電(dian)(dian)運(yun)轉會(hui)造成諧振過(guo)電(dian)(dian)壓，產(chan)生(sheng)(sheng)幾倍于正常的過(guo)電(dian)(dian)壓，過(guo)電(dian)(dian)壓將(jiang)進一步使線路上的絕(jue)緣(yuan)(yuan)層絕(jue)緣(yuan)(yuan)子擊穿，造成嚴峻的相(xiang)間短路事端。不管是(shi)哪(na)種情(qing)況都須要對毛(mao)病(bing)點定位，隨后趕快組織維修毛(mao)病(bing)點。單(dan)相(xiang)接地毛(mao)病(bing)產(chan)生(sheng)(sheng)后能(neng)維持運(yun)轉一定時(shi)間，因此大(da)大(da)提高了供電(dian)(dian)牢靠性(xing)。

配電開關(guan)的(de)(de)一二次成套設(she)備的(de)(de)技能研發，是為了更好(hao)的(de)(de)標準配網(wang)主(zhu)設(she)備，保障(zhang)建造(zao)過程中一二次同步建造(zao)投運(yun)，防止(zhi)后期的(de)(de)改造(zao)，關(guan)于縮短施工期、提高牢靠性及運(yun)維功率、簡化投標流程等具有(you)重要意(yi)義(yi)。