改進(jin)成套設(she)備的功能，添加單相(xiang)接(jie)地(di)毛病就(jiu)近檢測(ce)和阻(zu)隔(ge)，關于中性(xing)點不接(jie)地(di)和經消(xiao)弧線圈接(jie)地(di)毛病處理辦法也將是一項重大的技(ji)(ji)能革新。提升配網單相(xiang)接(jie)地(di)毛病選線成功率、探索完善接(jie)地(di)毛病阻(zu)隔(ge)技(ji)(ji)能。

現有(you)接(jie)(jie)地(di)(di)毛病(bing)選(xuan)線(xian)維護主要選(xuan)用(yong)中性(xing)(xing)點經小電(dian)阻(zu)接(jie)(jie)地(di)(di)辦法下的零(ling)序電(dian)流維護或中性(xing)(xing)點非有(you)用(yong)接(jie)(jie)地(di)(di)辦法下的小電(dian)流接(jie)(jie)地(di)(di)選(xuan)線(xian)維護，在面臨高阻(zu)、間歇性(xing)(xing)等毛病(bing)時，仍存在選(xuan)線(xian)準(zhun)確(que)率差，無法有(you)用(yong)阻(zu)隔毛病(bing)，存在巨大隱患。當高阻(zu)接(jie)(jie)地(di)(di)到(dao)達1000歐姆以上時，設備動(dong)作牢(lao)靠率80%；設備動(dong)作后選(xuan)線(xian)準(zhun)確(que)率90%。毛病(bing)檢測精度差開關拒動(dong)誤動(dong)率高，導致配電(dian)網牢(lao)靠性(xing)(xing)下降。

從(cong)配電(dian)(dian)網規(gui)(gui)劃規(gui)(gui)劃下手(shou)合(he)理的(de)(de)(de)選(xuan)(xuan)(xuan)(xuan)擇(ze)中性(xing)點接(jie)(jie)(jie)地(di)(di)辦法，開(kai)展高低壓開(kai)關(guan)柜成套設備技能研(yan)究，開(kai)展小(xiao)(xiao)電(dian)(dian)流(liu)(liu)(liu)接(jie)(jie)(jie)地(di)(di)體系單相接(jie)(jie)(jie)地(di)(di)毛病(bing)(bing)選(xuan)(xuan)(xuan)(xuan)線(xian)(xian)(xian)(xian)辦法的(de)(de)(de)研(yan)究，進一步(bu)提(ti)高單相接(jie)(jie)(jie)地(di)(di)毛病(bing)(bing)選(xuan)(xuan)(xuan)(xuan)線(xian)(xian)(xian)(xian)的(de)(de)(de)準確率。選(xuan)(xuan)(xuan)(xuan)用小(xiao)(xiao)電(dian)(dian)流(liu)(liu)(liu)接(jie)(jie)(jie)地(di)(di)體系的(de)(de)(de)區域要裝(zhuang)備接(jie)(jie)(jie)地(di)(di)毛病(bing)(bing)線(xian)(xian)(xian)(xian)段判(pan)別與(yu)(yu)阻隔設備。國家電(dian)(dian)網正在(zai)(zai)修(xiu)訂的(de)(de)(de)《配電(dian)(dian)網技能導則》規(gui)(gui)則變電(dian)(dian)站要安(an)裝(zhuang)牢靠(kao)的(de)(de)(de)選(xuan)(xuan)(xuan)(xuan)線(xian)(xian)(xian)(xian)設備，在(zai)(zai)10s內切除的(de)(de)(de)接(jie)(jie)(jie)地(di)(di)毛病(bing)(bing)。在(zai)(zai)小(xiao)(xiao)電(dian)(dian)流(liu)(liu)(liu)接(jie)(jie)(jie)地(di)(di)配電(dian)(dian)網中，消(xiao)弧線(xian)(xian)(xian)(xian)圈將接(jie)(jie)(jie)地(di)(di)電(dian)(dian)流(liu)(liu)(liu)降至只(zhi)有幾個安(an)培，盡(jin)管有利(li)于熄弧，但也使毛病(bing)(bing)線(xian)(xian)(xian)(xian)路(lu)(lu)的(de)(de)(de)工頻零序(xu)電(dian)(dian)流(liu)(liu)(liu)往往小(xiao)(xiao)于非(fei)(fei)毛病(bing)(bing)線(xian)(xian)(xian)(xian)路(lu)(lu)的(de)(de)(de)電(dian)(dian)流(liu)(liu)(liu)并且二者的(de)(de)(de)相位也根本相同，毛病(bing)(bing)線(xian)(xian)(xian)(xian)路(lu)(lu)工頻零序(xu)電(dian)(dian)流(liu)(liu)(liu)沒有了差異與(yu)(yu)非(fei)(fei)毛病(bing)(bing)線(xian)(xian)(xian)(xian)路(lu)(lu)的(de)(de)(de)特征，這關(guan)于單相接(jie)(jie)(jie)地(di)(di)毛病(bing)(bing)檢測(ce)來說(shuo)正確選(xuan)(xuan)(xuan)(xuan)線(xian)(xian)(xian)(xian)是(shi)困難的(de)(de)(de)。

10KV電(dian)力體系(xi)大多是小電(dian)流接地(di)(di)體系(xi)，當體系(xi)中產(chan)生(sheng)單相(xiang)接地(di)(di)時，不(bu)(bu)會產(chan)生(sheng)很大的短路(lu)電(dian)流。毛病(bing)點(dian)(dian)電(dian)弧經過(guo)消弧線圈(quan)補償感抗(kang)后能(neng)夠自行平息，熄(xi)弧后接地(di)(di)址絕(jue)緣可自行康復，能(neng)主動鏟除單相(xiang)接地(di)(di)毛病(bing)。如果(guo)間(jian)歇(xie)性(xing)弧光不(bu)(bu)能(neng)平息，長時間(jian)帶電(dian)運轉(zhuan)會造成諧(xie)振過(guo)電(dian)壓，產(chan)生(sheng)幾倍于正常的過(guo)電(dian)壓，過(guo)電(dian)壓將進一步(bu)使線路(lu)上(shang)的絕(jue)緣層絕(jue)緣子擊穿，造成嚴峻的相(xiang)間(jian)短路(lu)事端。不(bu)(bu)管是哪種(zhong)情況都須(xu)要對毛病(bing)點(dian)(dian)定位，隨(sui)后趕快(kuai)組織維修毛病(bing)點(dian)(dian)。單相(xiang)接地(di)(di)毛病(bing)產(chan)生(sheng)后能(neng)維持運轉(zhuan)一定時間(jian)，因此(ci)大大提高了供(gong)電(dian)牢靠性(xing)。

配電開(kai)關的一二(er)次成套設(she)備的技能研發，是為了更好的標(biao)準(zhun)配網主設(she)備，保障(zhang)建造過(guo)程中一二(er)次同步建造投運(yun)，防止(zhi)后期(qi)的改(gai)造，關于(yu)縮短施工期(qi)、提高牢靠性及(ji)運(yun)維功率、簡化投標(biao)流程等具(ju)有(you)重(zhong)要意義。