改進(jin)成(cheng)套設(she)備的(de)功能(neng)，添(tian)加單相接地毛病就近檢測和阻隔，關于中性點不接地和經消弧線圈(quan)接地毛病處理辦法(fa)也(ye)將是一項重大的(de)技能(neng)革新。提升配網單相接地毛病選線成(cheng)功率、探索完善接地毛病阻隔技能(neng)。

現有(you)接(jie)(jie)地(di)(di)毛病(bing)選(xuan)(xuan)線(xian)(xian)維(wei)護主要選(xuan)(xuan)用(yong)(yong)中性點經小電(dian)(dian)阻(zu)接(jie)(jie)地(di)(di)辦(ban)法下的零序(xu)電(dian)(dian)流維(wei)護或中性點非有(you)用(yong)(yong)接(jie)(jie)地(di)(di)辦(ban)法下的小電(dian)(dian)流接(jie)(jie)地(di)(di)選(xuan)(xuan)線(xian)(xian)維(wei)護，在面臨高(gao)阻(zu)、間(jian)歇性等毛病(bing)時，仍存(cun)在選(xuan)(xuan)線(xian)(xian)準確(que)率(lv)(lv)差，無法有(you)用(yong)(yong)阻(zu)隔毛病(bing)，存(cun)在巨大隱患。當高(gao)阻(zu)接(jie)(jie)地(di)(di)到(dao)達1000歐姆以(yi)上時，設(she)備(bei)動(dong)(dong)作牢(lao)靠率(lv)(lv)80%；設(she)備(bei)動(dong)(dong)作后(hou)選(xuan)(xuan)線(xian)(xian)準確(que)率(lv)(lv)90%。毛病(bing)檢測精度差開關拒動(dong)(dong)誤動(dong)(dong)率(lv)(lv)高(gao)，導致(zhi)配電(dian)(dian)網牢(lao)靠性下降。

從配電(dian)(dian)網(wang)(wang)規(gui)劃規(gui)劃下手合理的選(xuan)(xuan)擇中(zhong)性(xing)點接地(di)(di)辦法，開展高低(di)壓開關柜成(cheng)套設備技能(neng)研究，開展小(xiao)(xiao)電(dian)(dian)流(liu)接地(di)(di)體系(xi)單相(xiang)接地(di)(di)毛(mao)病(bing)(bing)選(xuan)(xuan)線(xian)(xian)辦法的研究，進(jin)一步提高單相(xiang)接地(di)(di)毛(mao)病(bing)(bing)選(xuan)(xuan)線(xian)(xian)的準確率。選(xuan)(xuan)用小(xiao)(xiao)電(dian)(dian)流(liu)接地(di)(di)體系(xi)的區域要裝(zhuang)備接地(di)(di)毛(mao)病(bing)(bing)線(xian)(xian)段判別與(yu)阻隔(ge)設備。國家電(dian)(dian)網(wang)(wang)正在(zai)修(xiu)訂的《配電(dian)(dian)網(wang)(wang)技能(neng)導則(ze)》規(gui)則(ze)變電(dian)(dian)站要安(an)裝(zhuang)牢靠的選(xuan)(xuan)線(xian)(xian)設備，在(zai)10s內切除的接地(di)(di)毛(mao)病(bing)(bing)。在(zai)小(xiao)(xiao)電(dian)(dian)流(liu)接地(di)(di)配電(dian)(dian)網(wang)(wang)中(zhong)，消弧(hu)線(xian)(xian)圈(quan)將(jiang)接地(di)(di)電(dian)(dian)流(liu)降至只有幾(ji)個安(an)培(pei)，盡(jin)管有利(li)于(yu)(yu)熄弧(hu)，但也使毛(mao)病(bing)(bing)線(xian)(xian)路(lu)的工頻零序電(dian)(dian)流(liu)往往小(xiao)(xiao)于(yu)(yu)非毛(mao)病(bing)(bing)線(xian)(xian)路(lu)的電(dian)(dian)流(liu)并且二者的相(xiang)位也根本相(xiang)同(tong)，毛(mao)病(bing)(bing)線(xian)(xian)路(lu)工頻零序電(dian)(dian)流(liu)沒有了差異與(yu)非毛(mao)病(bing)(bing)線(xian)(xian)路(lu)的特征，這關于(yu)(yu)單相(xiang)接地(di)(di)毛(mao)病(bing)(bing)檢測來(lai)說正確選(xuan)(xuan)線(xian)(xian)是(shi)困難的。

10KV電力(li)體(ti)系(xi)大多是小電流接(jie)(jie)地體(ti)系(xi)，當(dang)體(ti)系(xi)中產(chan)生(sheng)單(dan)相(xiang)(xiang)(xiang)接(jie)(jie)地時(shi)，不會(hui)產(chan)生(sheng)很大的短路電流。毛病(bing)(bing)點電弧經過(guo)(guo)(guo)消(xiao)弧線(xian)圈補償感(gan)抗后(hou)能(neng)夠自行平息(xi)，熄弧后(hou)接(jie)(jie)地址絕(jue)緣(yuan)(yuan)可自行康復，能(neng)主動鏟除單(dan)相(xiang)(xiang)(xiang)接(jie)(jie)地毛病(bing)(bing)。如果(guo)間(jian)歇(xie)性弧光(guang)不能(neng)平息(xi)，長時(shi)間(jian)帶電運(yun)轉會(hui)造成諧振過(guo)(guo)(guo)電壓，產(chan)生(sheng)幾倍于正(zheng)常的過(guo)(guo)(guo)電壓，過(guo)(guo)(guo)電壓將進一(yi)步使線(xian)路上的絕(jue)緣(yuan)(yuan)層絕(jue)緣(yuan)(yuan)子擊(ji)穿，造成嚴(yan)峻的相(xiang)(xiang)(xiang)間(jian)短路事(shi)端。不管(guan)是哪種(zhong)情況(kuang)都(dou)須(xu)要對毛病(bing)(bing)點定(ding)位，隨后(hou)趕快(kuai)組(zu)織(zhi)維(wei)修毛病(bing)(bing)點。單(dan)相(xiang)(xiang)(xiang)接(jie)(jie)地毛病(bing)(bing)產(chan)生(sheng)后(hou)能(neng)維(wei)持運(yun)轉一(yi)定(ding)時(shi)間(jian)，因此大大提高了供電牢靠性。

配電開關的(de)一(yi)二(er)(er)次(ci)成套設備(bei)的(de)技能研發，是為了更好的(de)標準配網主設備(bei)，保(bao)障建(jian)造過程中一(yi)二(er)(er)次(ci)同(tong)步建(jian)造投運，防止后(hou)期的(de)改(gai)造，關于(yu)縮短施工期、提高牢靠性及運維功率、簡(jian)化(hua)投標流程等(deng)具有重(zhong)要意義。