改進成套(tao)設備的(de)功能(neng)，添加(jia)單(dan)相(xiang)接地(di)(di)毛病就近檢測(ce)和阻(zu)隔(ge)，關于(yu)中性(xing)點不接地(di)(di)和經消弧線圈接地(di)(di)毛病處理辦(ban)法也將是一項重大(da)的(de)技能(neng)革新。提升配網(wang)單(dan)相(xiang)接地(di)(di)毛病選線成功率、探索(suo)完善接地(di)(di)毛病阻(zu)隔(ge)技能(neng)。

現有(you)(you)(you)接地毛病選(xuan)(xuan)線(xian)維護主要選(xuan)(xuan)用(yong)(yong)中(zhong)性點(dian)經小電(dian)阻接地辦法下的(de)零序電(dian)流(liu)維護或中(zhong)性點(dian)非有(you)(you)(you)用(yong)(yong)接地辦法下的(de)小電(dian)流(liu)接地選(xuan)(xuan)線(xian)維護，在(zai)面臨高阻、間歇性等毛病時(shi)(shi)，仍存在(zai)選(xuan)(xuan)線(xian)準確(que)率(lv)(lv)(lv)差(cha)，無(wu)法有(you)(you)(you)用(yong)(yong)阻隔毛病，存在(zai)巨(ju)大(da)隱患(huan)。當高阻接地到達1000歐姆以上(shang)時(shi)(shi)，設備(bei)動(dong)作(zuo)牢靠率(lv)(lv)(lv)80%；設備(bei)動(dong)作(zuo)后選(xuan)(xuan)線(xian)準確(que)率(lv)(lv)(lv)90%。毛病檢測精度(du)差(cha)開關拒動(dong)誤動(dong)率(lv)(lv)(lv)高，導(dao)致配電(dian)網牢靠性下降。

從配電(dian)(dian)網(wang)規劃規劃下手合理(li)的(de)選(xuan)擇中(zhong)性點接(jie)(jie)地(di)(di)(di)辦法，開(kai)(kai)展(zhan)高(gao)低壓(ya)開(kai)(kai)關柜成套設備(bei)(bei)技能研究，開(kai)(kai)展(zhan)小(xiao)電(dian)(dian)流(liu)(liu)接(jie)(jie)地(di)(di)(di)體(ti)系單(dan)相接(jie)(jie)地(di)(di)(di)毛(mao)病(bing)(bing)選(xuan)線辦法的(de)研究，進一步提(ti)高(gao)單(dan)相接(jie)(jie)地(di)(di)(di)毛(mao)病(bing)(bing)選(xuan)線的(de)準(zhun)確率。選(xuan)用小(xiao)電(dian)(dian)流(liu)(liu)接(jie)(jie)地(di)(di)(di)體(ti)系的(de)區域要裝備(bei)(bei)接(jie)(jie)地(di)(di)(di)毛(mao)病(bing)(bing)線段判別與(yu)阻隔設備(bei)(bei)。國家電(dian)(dian)網(wang)正在(zai)(zai)修訂(ding)的(de)《配電(dian)(dian)網(wang)技能導(dao)則》規則變電(dian)(dian)站要安裝牢靠的(de)選(xuan)線設備(bei)(bei)，在(zai)(zai)10s內(nei)切除(chu)的(de)接(jie)(jie)地(di)(di)(di)毛(mao)病(bing)(bing)。在(zai)(zai)小(xiao)電(dian)(dian)流(liu)(liu)接(jie)(jie)地(di)(di)(di)配電(dian)(dian)網(wang)中(zhong)，消弧(hu)線圈將接(jie)(jie)地(di)(di)(di)電(dian)(dian)流(liu)(liu)降(jiang)至只有幾個安培，盡管(guan)有利于(yu)熄弧(hu)，但也使毛(mao)病(bing)(bing)線路的(de)工(gong)頻零序電(dian)(dian)流(liu)(liu)往(wang)往(wang)小(xiao)于(yu)非毛(mao)病(bing)(bing)線路的(de)電(dian)(dian)流(liu)(liu)并(bing)且二者的(de)相位也根(gen)本相同，毛(mao)病(bing)(bing)線路工(gong)頻零序電(dian)(dian)流(liu)(liu)沒有了(le)差異(yi)與(yu)非毛(mao)病(bing)(bing)線路的(de)特征，這(zhe)關于(yu)單(dan)相接(jie)(jie)地(di)(di)(di)毛(mao)病(bing)(bing)檢測來說正確選(xuan)線是(shi)困難的(de)。

10KV電(dian)(dian)(dian)(dian)力(li)體(ti)系(xi)大(da)多是小電(dian)(dian)(dian)(dian)流接(jie)(jie)地(di)(di)體(ti)系(xi)，當體(ti)系(xi)中產(chan)生單相接(jie)(jie)地(di)(di)時(shi)(shi)，不會產(chan)生很大(da)的(de)短路電(dian)(dian)(dian)(dian)流。毛(mao)(mao)病(bing)點電(dian)(dian)(dian)(dian)弧(hu)經過消弧(hu)線(xian)圈補償感抗(kang)后(hou)(hou)能(neng)(neng)夠自行平(ping)息(xi)，熄弧(hu)后(hou)(hou)接(jie)(jie)地(di)(di)址絕緣可自行康復，能(neng)(neng)主動鏟除單相接(jie)(jie)地(di)(di)毛(mao)(mao)病(bing)。如果間(jian)歇性弧(hu)光不能(neng)(neng)平(ping)息(xi)，長時(shi)(shi)間(jian)帶(dai)電(dian)(dian)(dian)(dian)運(yun)轉會造成(cheng)諧振(zhen)過電(dian)(dian)(dian)(dian)壓(ya)，產(chan)生幾倍于正常的(de)過電(dian)(dian)(dian)(dian)壓(ya)，過電(dian)(dian)(dian)(dian)壓(ya)將進(jin)一步使線(xian)路上的(de)絕緣層絕緣子擊(ji)穿，造成(cheng)嚴峻的(de)相間(jian)短路事端。不管是哪種情況(kuang)都須要對毛(mao)(mao)病(bing)點定(ding)位(wei)，隨后(hou)(hou)趕快組織維修毛(mao)(mao)病(bing)點。單相接(jie)(jie)地(di)(di)毛(mao)(mao)病(bing)產(chan)生后(hou)(hou)能(neng)(neng)維持運(yun)轉一定(ding)時(shi)(shi)間(jian)，因(yin)此大(da)大(da)提高(gao)了供電(dian)(dian)(dian)(dian)牢靠性。

配(pei)電(dian)開關的(de)(de)一二次成套設備(bei)的(de)(de)技能研發，是為了更好(hao)的(de)(de)標準(zhun)配(pei)網主設備(bei)，保障(zhang)建(jian)造(zao)過程(cheng)中一二次同步建(jian)造(zao)投運，防止(zhi)后期(qi)的(de)(de)改造(zao)，關于縮短施工期(qi)、提高牢靠性及(ji)運維功率、簡化投標流(liu)程(cheng)等具有重要意義。