改進成套設備的功能，添加(jia)單相(xiang)接地(di)(di)毛(mao)(mao)病(bing)就(jiu)近檢測和阻(zu)(zu)隔(ge)(ge)，關于中(zhong)性(xing)點不接地(di)(di)和經消弧線圈接地(di)(di)毛(mao)(mao)病(bing)處理辦法也(ye)將是一(yi)項重大的技能革新。提升(sheng)配網單相(xiang)接地(di)(di)毛(mao)(mao)病(bing)選線成功率、探索完(wan)善接地(di)(di)毛(mao)(mao)病(bing)阻(zu)(zu)隔(ge)(ge)技能。

現有接(jie)地(di)毛(mao)病(bing)(bing)選(xuan)線維(wei)(wei)護主要(yao)選(xuan)用中性(xing)(xing)點經小(xiao)電(dian)(dian)阻(zu)接(jie)地(di)辦法下(xia)的(de)零序電(dian)(dian)流維(wei)(wei)護或中性(xing)(xing)點非有用接(jie)地(di)辦法下(xia)的(de)小(xiao)電(dian)(dian)流接(jie)地(di)選(xuan)線維(wei)(wei)護，在面臨高(gao)阻(zu)、間歇性(xing)(xing)等毛(mao)病(bing)(bing)時，仍存在選(xuan)線準(zhun)確(que)率(lv)差，無法有用阻(zu)隔毛(mao)病(bing)(bing)，存在巨大隱患。當高(gao)阻(zu)接(jie)地(di)到達1000歐姆以上時，設備(bei)動(dong)作(zuo)牢靠率(lv)80%；設備(bei)動(dong)作(zuo)后選(xuan)線準(zhun)確(que)率(lv)90%。毛(mao)病(bing)(bing)檢測精度(du)差開關拒(ju)動(dong)誤動(dong)率(lv)高(gao)，導致配(pei)電(dian)(dian)網(wang)牢靠性(xing)(xing)下(xia)降。

從配(pei)電(dian)網規(gui)劃規(gui)劃下手(shou)合理的(de)(de)選(xuan)擇中性點(dian)接(jie)(jie)(jie)地(di)(di)(di)辦法，開展(zhan)(zhan)高(gao)(gao)低壓開關(guan)(guan)柜成套(tao)設備(bei)技能研究，開展(zhan)(zhan)小電(dian)流(liu)接(jie)(jie)(jie)地(di)(di)(di)體(ti)系單相(xiang)(xiang)(xiang)接(jie)(jie)(jie)地(di)(di)(di)毛病(bing)選(xuan)線(xian)(xian)辦法的(de)(de)研究，進一步提(ti)高(gao)(gao)單相(xiang)(xiang)(xiang)接(jie)(jie)(jie)地(di)(di)(di)毛病(bing)選(xuan)線(xian)(xian)的(de)(de)準確率。選(xuan)用(yong)小電(dian)流(liu)接(jie)(jie)(jie)地(di)(di)(di)體(ti)系的(de)(de)區(qu)域要(yao)裝備(bei)接(jie)(jie)(jie)地(di)(di)(di)毛病(bing)線(xian)(xian)段判(pan)別與(yu)阻隔設備(bei)。國家電(dian)網正(zheng)在修訂的(de)(de)《配(pei)電(dian)網技能導則(ze)》規(gui)則(ze)變(bian)電(dian)站(zhan)要(yao)安裝牢靠的(de)(de)選(xuan)線(xian)(xian)設備(bei)，在10s內切除(chu)的(de)(de)接(jie)(jie)(jie)地(di)(di)(di)毛病(bing)。在小電(dian)流(liu)接(jie)(jie)(jie)地(di)(di)(di)配(pei)電(dian)網中，消(xiao)弧線(xian)(xian)圈將(jiang)接(jie)(jie)(jie)地(di)(di)(di)電(dian)流(liu)降至只有幾(ji)個安培，盡管有利于(yu)熄弧，但也使毛病(bing)線(xian)(xian)路(lu)(lu)的(de)(de)工(gong)頻(pin)零序(xu)電(dian)流(liu)往(wang)往(wang)小于(yu)非毛病(bing)線(xian)(xian)路(lu)(lu)的(de)(de)電(dian)流(liu)并且二者(zhe)的(de)(de)相(xiang)(xiang)(xiang)位也根本相(xiang)(xiang)(xiang)同，毛病(bing)線(xian)(xian)路(lu)(lu)工(gong)頻(pin)零序(xu)電(dian)流(liu)沒有了差異與(yu)非毛病(bing)線(xian)(xian)路(lu)(lu)的(de)(de)特(te)征，這關(guan)(guan)于(yu)單相(xiang)(xiang)(xiang)接(jie)(jie)(jie)地(di)(di)(di)毛病(bing)檢測來說正(zheng)確選(xuan)線(xian)(xian)是困(kun)難的(de)(de)。

10KV電(dian)(dian)力體系大多是(shi)小(xiao)電(dian)(dian)流接(jie)(jie)地(di)(di)(di)(di)(di)體系，當(dang)體系中產(chan)生(sheng)單相(xiang)(xiang)接(jie)(jie)地(di)(di)(di)(di)(di)時，不(bu)會產(chan)生(sheng)很大的(de)(de)短(duan)路電(dian)(dian)流。毛(mao)病(bing)點(dian)(dian)電(dian)(dian)弧經過(guo)消弧線圈補償感(gan)抗后(hou)(hou)能(neng)(neng)夠自(zi)行(xing)(xing)平息，熄弧后(hou)(hou)接(jie)(jie)地(di)(di)(di)(di)(di)址絕(jue)緣可自(zi)行(xing)(xing)康復(fu)，能(neng)(neng)主(zhu)動鏟除單相(xiang)(xiang)接(jie)(jie)地(di)(di)(di)(di)(di)毛(mao)病(bing)。如果間歇(xie)性弧光不(bu)能(neng)(neng)平息，長時間帶電(dian)(dian)運轉會造成諧振(zhen)過(guo)電(dian)(dian)壓(ya)，產(chan)生(sheng)幾倍于正常的(de)(de)過(guo)電(dian)(dian)壓(ya)，過(guo)電(dian)(dian)壓(ya)將進一步(bu)使(shi)線路上的(de)(de)絕(jue)緣層絕(jue)緣子擊穿，造成嚴峻的(de)(de)相(xiang)(xiang)間短(duan)路事端。不(bu)管是(shi)哪種情況都須(xu)要對毛(mao)病(bing)點(dian)(dian)定(ding)位，隨后(hou)(hou)趕(gan)快組織維(wei)修毛(mao)病(bing)點(dian)(dian)。單相(xiang)(xiang)接(jie)(jie)地(di)(di)(di)(di)(di)毛(mao)病(bing)產(chan)生(sheng)后(hou)(hou)能(neng)(neng)維(wei)持運轉一定(ding)時間，因此(ci)大大提(ti)高了供電(dian)(dian)牢靠性。

配(pei)電開關的一二(er)次成套設備的技能研發，是為了(le)更好的標準配(pei)網(wang)主(zhu)設備，保障建造(zao)過程中一二(er)次同步建造(zao)投運，防(fang)止后(hou)期(qi)的改造(zao)，關于縮短(duan)施工(gong)期(qi)、提高牢(lao)靠性及(ji)運維功(gong)率(lv)、簡(jian)化(hua)投標流程等具有重要(yao)意義。