改進(jin)成(cheng)(cheng)套(tao)設(she)備的(de)功能，添加單相接地(di)毛(mao)病(bing)(bing)(bing)(bing)就近檢測和(he)阻隔，關于中性點不(bu)接地(di)和(he)經(jing)消弧線圈接地(di)毛(mao)病(bing)(bing)(bing)(bing)處(chu)理辦法也將(jiang)是一(yi)項重大的(de)技能革(ge)新。提升配網單相接地(di)毛(mao)病(bing)(bing)(bing)(bing)選(xuan)線成(cheng)(cheng)功率、探索完善接地(di)毛(mao)病(bing)(bing)(bing)(bing)阻隔技能。

現(xian)有接(jie)地毛(mao)病(bing)選線維(wei)(wei)護(hu)主要選用(yong)中性點經(jing)小電阻接(jie)地辦(ban)法下的(de)零序(xu)電流維(wei)(wei)護(hu)或中性點非有用(yong)接(jie)地辦(ban)法下的(de)小電流接(jie)地選線維(wei)(wei)護(hu)，在(zai)面臨(lin)高(gao)(gao)阻、間歇(xie)性等毛(mao)病(bing)時(shi)，仍存在(zai)選線準確率(lv)(lv)差，無法有用(yong)阻隔毛(mao)病(bing)，存在(zai)巨大隱患。當高(gao)(gao)阻接(jie)地到達(da)1000歐姆以上時(shi)，設備動作牢(lao)靠(kao)率(lv)(lv)80%；設備動作后選線準確率(lv)(lv)90%。毛(mao)病(bing)檢測精度差開關拒動誤動率(lv)(lv)高(gao)(gao)，導致配電網牢(lao)靠(kao)性下降。

從(cong)配(pei)電(dian)(dian)網(wang)規(gui)劃規(gui)劃下手(shou)合理(li)的(de)(de)選擇(ze)中性點接(jie)地(di)辦法，開展高低壓開關柜成套(tao)設備(bei)(bei)(bei)技(ji)能(neng)研(yan)究，開展小(xiao)電(dian)(dian)流(liu)接(jie)地(di)體系(xi)(xi)單相(xiang)接(jie)地(di)毛(mao)(mao)病(bing)(bing)選線(xian)(xian)(xian)(xian)辦法的(de)(de)研(yan)究，進一步(bu)提高單相(xiang)接(jie)地(di)毛(mao)(mao)病(bing)(bing)選線(xian)(xian)(xian)(xian)的(de)(de)準確率。選用小(xiao)電(dian)(dian)流(liu)接(jie)地(di)體系(xi)(xi)的(de)(de)區域(yu)要裝備(bei)(bei)(bei)接(jie)地(di)毛(mao)(mao)病(bing)(bing)線(xian)(xian)(xian)(xian)段判別與阻隔設備(bei)(bei)(bei)。國(guo)家(jia)電(dian)(dian)網(wang)正(zheng)在修訂的(de)(de)《配(pei)電(dian)(dian)網(wang)技(ji)能(neng)導則》規(gui)則變電(dian)(dian)站要安裝牢靠的(de)(de)選線(xian)(xian)(xian)(xian)設備(bei)(bei)(bei)，在10s內切除的(de)(de)接(jie)地(di)毛(mao)(mao)病(bing)(bing)。在小(xiao)電(dian)(dian)流(liu)接(jie)地(di)配(pei)電(dian)(dian)網(wang)中，消弧線(xian)(xian)(xian)(xian)圈將接(jie)地(di)電(dian)(dian)流(liu)降(jiang)至只有(you)幾個安培，盡管(guan)有(you)利(li)于熄(xi)弧，但也(ye)(ye)使毛(mao)(mao)病(bing)(bing)線(xian)(xian)(xian)(xian)路(lu)(lu)的(de)(de)工頻零(ling)序(xu)電(dian)(dian)流(liu)往往小(xiao)于非(fei)毛(mao)(mao)病(bing)(bing)線(xian)(xian)(xian)(xian)路(lu)(lu)的(de)(de)電(dian)(dian)流(liu)并且二者的(de)(de)相(xiang)位也(ye)(ye)根本相(xiang)同，毛(mao)(mao)病(bing)(bing)線(xian)(xian)(xian)(xian)路(lu)(lu)工頻零(ling)序(xu)電(dian)(dian)流(liu)沒有(you)了差異(yi)與非(fei)毛(mao)(mao)病(bing)(bing)線(xian)(xian)(xian)(xian)路(lu)(lu)的(de)(de)特征，這關于單相(xiang)接(jie)地(di)毛(mao)(mao)病(bing)(bing)檢測來說正(zheng)確選線(xian)(xian)(xian)(xian)是困難的(de)(de)。

10KV電(dian)力(li)體(ti)系大(da)多(duo)是(shi)小電(dian)流(liu)接(jie)地(di)體(ti)系，當體(ti)系中(zhong)產(chan)生(sheng)單相(xiang)接(jie)地(di)時(shi)，不會產(chan)生(sheng)很大(da)的(de)(de)短路(lu)(lu)電(dian)流(liu)。毛(mao)(mao)(mao)病(bing)(bing)(bing)點電(dian)弧(hu)經過(guo)消弧(hu)線(xian)圈補償感(gan)抗后能(neng)夠自(zi)行平(ping)息，熄弧(hu)后接(jie)地(di)址絕緣可自(zi)行康復，能(neng)主動(dong)鏟除單相(xiang)接(jie)地(di)毛(mao)(mao)(mao)病(bing)(bing)(bing)。如果間(jian)歇性弧(hu)光(guang)不能(neng)平(ping)息，長(chang)時(shi)間(jian)帶電(dian)運(yun)轉(zhuan)會造成諧(xie)振過(guo)電(dian)壓，產(chan)生(sheng)幾倍于正常的(de)(de)過(guo)電(dian)壓，過(guo)電(dian)壓將進一(yi)步使線(xian)路(lu)(lu)上的(de)(de)絕緣層絕緣子擊穿，造成嚴峻(jun)的(de)(de)相(xiang)間(jian)短路(lu)(lu)事端。不管(guan)是(shi)哪種情況都須要(yao)對毛(mao)(mao)(mao)病(bing)(bing)(bing)點定(ding)位(wei)，隨(sui)后趕快組織維修毛(mao)(mao)(mao)病(bing)(bing)(bing)點。單相(xiang)接(jie)地(di)毛(mao)(mao)(mao)病(bing)(bing)(bing)產(chan)生(sheng)后能(neng)維持運(yun)轉(zhuan)一(yi)定(ding)時(shi)間(jian)，因此(ci)大(da)大(da)提高了供電(dian)牢(lao)靠(kao)性。

配電開(kai)關的一二次成套(tao)設(she)備的技能研發，是為了更(geng)好的標準(zhun)配網主設(she)備，保障(zhang)建(jian)(jian)造過程中(zhong)一二次同步建(jian)(jian)造投(tou)運(yun)，防止后期(qi)的改造，關于(yu)縮短(duan)施工期(qi)、提高牢靠(kao)性及運(yun)維功率、簡化投(tou)標流程等具有重要意(yi)義。