改進成(cheng)套設備的(de)功能，添加(jia)單相接(jie)(jie)地毛病(bing)就近檢測和(he)阻隔，關于中性(xing)點不接(jie)(jie)地和(he)經消(xiao)弧線圈(quan)接(jie)(jie)地毛病(bing)處理辦(ban)法也將是一項(xiang)重(zhong)大的(de)技能革新。提升配網單相接(jie)(jie)地毛病(bing)選線成(cheng)功率、探索完(wan)善(shan)接(jie)(jie)地毛病(bing)阻隔技能。

現(xian)有(you)接地(di)毛(mao)(mao)病選線維護(hu)主要選用中性點(dian)(dian)經小電阻(zu)(zu)接地(di)辦(ban)(ban)法(fa)下(xia)的零序電流維護(hu)或中性點(dian)(dian)非有(you)用接地(di)辦(ban)(ban)法(fa)下(xia)的小電流接地(di)選線維護(hu)，在(zai)面(mian)臨高阻(zu)(zu)、間(jian)歇性等毛(mao)(mao)病時(shi)，仍(reng)存在(zai)選線準(zhun)確率(lv)差(cha)，無法(fa)有(you)用阻(zu)(zu)隔毛(mao)(mao)病，存在(zai)巨大隱(yin)患。當高阻(zu)(zu)接地(di)到(dao)達1000歐姆以上時(shi)，設備動(dong)(dong)作(zuo)牢靠率(lv)80%；設備動(dong)(dong)作(zuo)后選線準(zhun)確率(lv)90%。毛(mao)(mao)病檢測(ce)精度差(cha)開關拒動(dong)(dong)誤動(dong)(dong)率(lv)高，導致配電網牢靠性下(xia)降。

從配(pei)(pei)電(dian)(dian)(dian)網(wang)(wang)規劃規劃下手(shou)合理(li)的(de)(de)(de)(de)選(xuan)(xuan)擇(ze)中(zhong)性點接(jie)(jie)(jie)地(di)辦(ban)法，開展高低壓開關(guan)柜成套設備技(ji)能研(yan)究(jiu)，開展小(xiao)電(dian)(dian)(dian)流接(jie)(jie)(jie)地(di)體系單(dan)相(xiang)(xiang)接(jie)(jie)(jie)地(di)毛病(bing)(bing)(bing)選(xuan)(xuan)線(xian)(xian)辦(ban)法的(de)(de)(de)(de)研(yan)究(jiu)，進(jin)一步(bu)提高單(dan)相(xiang)(xiang)接(jie)(jie)(jie)地(di)毛病(bing)(bing)(bing)選(xuan)(xuan)線(xian)(xian)的(de)(de)(de)(de)準(zhun)確(que)率。選(xuan)(xuan)用小(xiao)電(dian)(dian)(dian)流接(jie)(jie)(jie)地(di)體系的(de)(de)(de)(de)區域(yu)要裝備接(jie)(jie)(jie)地(di)毛病(bing)(bing)(bing)線(xian)(xian)段判別與(yu)阻隔設備。國家電(dian)(dian)(dian)網(wang)(wang)正(zheng)在(zai)修訂(ding)的(de)(de)(de)(de)《配(pei)(pei)電(dian)(dian)(dian)網(wang)(wang)技(ji)能導則(ze)》規則(ze)變電(dian)(dian)(dian)站要安(an)裝牢靠的(de)(de)(de)(de)選(xuan)(xuan)線(xian)(xian)設備，在(zai)10s內切除的(de)(de)(de)(de)接(jie)(jie)(jie)地(di)毛病(bing)(bing)(bing)。在(zai)小(xiao)電(dian)(dian)(dian)流接(jie)(jie)(jie)地(di)配(pei)(pei)電(dian)(dian)(dian)網(wang)(wang)中(zhong)，消(xiao)弧線(xian)(xian)圈將(jiang)接(jie)(jie)(jie)地(di)電(dian)(dian)(dian)流降至只有幾個安(an)培(pei)，盡管有利(li)于(yu)熄弧，但也使毛病(bing)(bing)(bing)線(xian)(xian)路的(de)(de)(de)(de)工頻零序電(dian)(dian)(dian)流往(wang)往(wang)小(xiao)于(yu)非(fei)毛病(bing)(bing)(bing)線(xian)(xian)路的(de)(de)(de)(de)電(dian)(dian)(dian)流并且(qie)二者的(de)(de)(de)(de)相(xiang)(xiang)位也根本相(xiang)(xiang)同，毛病(bing)(bing)(bing)線(xian)(xian)路工頻零序電(dian)(dian)(dian)流沒(mei)有了差異與(yu)非(fei)毛病(bing)(bing)(bing)線(xian)(xian)路的(de)(de)(de)(de)特征，這關(guan)于(yu)單(dan)相(xiang)(xiang)接(jie)(jie)(jie)地(di)毛病(bing)(bing)(bing)檢測(ce)來說正(zheng)確(que)選(xuan)(xuan)線(xian)(xian)是困(kun)難的(de)(de)(de)(de)。

10KV電(dian)(dian)力體(ti)系大(da)多是(shi)小電(dian)(dian)流接地體(ti)系，當體(ti)系中產生單相(xiang)(xiang)接地時，不會產生很大(da)的短(duan)路電(dian)(dian)流。毛(mao)(mao)病(bing)點電(dian)(dian)弧經(jing)過消弧線圈補償感抗后(hou)能(neng)夠自行(xing)平息，熄弧后(hou)接地址絕緣(yuan)(yuan)可(ke)自行(xing)康復，能(neng)主動鏟除單相(xiang)(xiang)接地毛(mao)(mao)病(bing)。如果(guo)間(jian)歇性(xing)弧光不能(neng)平息，長時間(jian)帶電(dian)(dian)運轉(zhuan)會造成諧振過電(dian)(dian)壓，產生幾倍于正常的過電(dian)(dian)壓，過電(dian)(dian)壓將(jiang)進一步(bu)使線路上的絕緣(yuan)(yuan)層絕緣(yuan)(yuan)子擊穿，造成嚴峻的相(xiang)(xiang)間(jian)短(duan)路事(shi)端。不管是(shi)哪(na)種(zhong)情(qing)況都須要對(dui)毛(mao)(mao)病(bing)點定(ding)位，隨后(hou)趕快組織維(wei)修毛(mao)(mao)病(bing)點。單相(xiang)(xiang)接地毛(mao)(mao)病(bing)產生后(hou)能(neng)維(wei)持運轉(zhuan)一定(ding)時間(jian)，因(yin)此大(da)大(da)提(ti)高了供(gong)電(dian)(dian)牢(lao)靠性(xing)。

配電(dian)開關(guan)的一二次成套設備(bei)的技能(neng)研發，是(shi)為了更好的標準配網主(zhu)設備(bei)，保障建造過程(cheng)中一二次同(tong)步建造投(tou)運，防(fang)止后期(qi)的改造，關(guan)于縮短(duan)施工期(qi)、提(ti)高牢靠(kao)性及(ji)運維(wei)功率(lv)、簡化投(tou)標流程(cheng)等(deng)具(ju)有重要意(yi)義。