改進成套(tao)設備的(de)功能，添加單相接地(di)毛(mao)(mao)病就近檢測和阻隔(ge)(ge)，關于(yu)中性點不接地(di)和經消弧線圈(quan)接地(di)毛(mao)(mao)病處理(li)辦法也將是一項重(zhong)大的(de)技能革(ge)新。提升配網單相接地(di)毛(mao)(mao)病選線成功率(lv)、探(tan)索完善接地(di)毛(mao)(mao)病阻隔(ge)(ge)技能。

現(xian)有接(jie)(jie)(jie)地毛(mao)病(bing)選(xuan)線(xian)(xian)維(wei)護(hu)主要(yao)選(xuan)用中(zhong)性(xing)點(dian)經小電阻(zu)(zu)接(jie)(jie)(jie)地辦法(fa)下的(de)零序電流維(wei)護(hu)或中(zhong)性(xing)點(dian)非有用接(jie)(jie)(jie)地辦法(fa)下的(de)小電流接(jie)(jie)(jie)地選(xuan)線(xian)(xian)維(wei)護(hu)，在(zai)(zai)面臨(lin)高阻(zu)(zu)、間歇性(xing)等毛(mao)病(bing)時(shi)，仍(reng)存(cun)在(zai)(zai)選(xuan)線(xian)(xian)準(zhun)確率(lv)差(cha)，無法(fa)有用阻(zu)(zu)隔(ge)毛(mao)病(bing)，存(cun)在(zai)(zai)巨大(da)隱患。當高阻(zu)(zu)接(jie)(jie)(jie)地到達1000歐姆(mu)以上時(shi)，設備動(dong)作(zuo)牢(lao)靠(kao)率(lv)80%；設備動(dong)作(zuo)后(hou)選(xuan)線(xian)(xian)準(zhun)確率(lv)90%。毛(mao)病(bing)檢(jian)測精度(du)差(cha)開關拒(ju)動(dong)誤動(dong)率(lv)高，導致配電網(wang)牢(lao)靠(kao)性(xing)下降。

從配(pei)電(dian)(dian)網(wang)(wang)規(gui)劃(hua)規(gui)劃(hua)下(xia)手合理的(de)選擇中性(xing)點接(jie)(jie)地(di)(di)辦(ban)(ban)法(fa)，開展(zhan)高低壓開關柜成(cheng)套(tao)設備(bei)技(ji)能研究，開展(zhan)小電(dian)(dian)流接(jie)(jie)地(di)(di)體系單相(xiang)接(jie)(jie)地(di)(di)毛病(bing)(bing)(bing)選線(xian)辦(ban)(ban)法(fa)的(de)研究，進一步(bu)提高單相(xiang)接(jie)(jie)地(di)(di)毛病(bing)(bing)(bing)選線(xian)的(de)準確率。選用小電(dian)(dian)流接(jie)(jie)地(di)(di)體系的(de)區(qu)域要裝備(bei)接(jie)(jie)地(di)(di)毛病(bing)(bing)(bing)線(xian)段(duan)判別與(yu)阻隔設備(bei)。國家電(dian)(dian)網(wang)(wang)正在修訂的(de)《配(pei)電(dian)(dian)網(wang)(wang)技(ji)能導(dao)則(ze)》規(gui)則(ze)變電(dian)(dian)站要安裝牢靠的(de)選線(xian)設備(bei)，在10s內切除的(de)接(jie)(jie)地(di)(di)毛病(bing)(bing)(bing)。在小電(dian)(dian)流接(jie)(jie)地(di)(di)配(pei)電(dian)(dian)網(wang)(wang)中，消(xiao)弧(hu)線(xian)圈將接(jie)(jie)地(di)(di)電(dian)(dian)流降至只有(you)幾個安培，盡(jin)管有(you)利于(yu)熄弧(hu)，但也使(shi)毛病(bing)(bing)(bing)線(xian)路的(de)工頻零(ling)序電(dian)(dian)流往往小于(yu)非(fei)毛病(bing)(bing)(bing)線(xian)路的(de)電(dian)(dian)流并且二(er)者(zhe)的(de)相(xiang)位也根(gen)本相(xiang)同，毛病(bing)(bing)(bing)線(xian)路工頻零(ling)序電(dian)(dian)流沒(mei)有(you)了差(cha)異與(yu)非(fei)毛病(bing)(bing)(bing)線(xian)路的(de)特(te)征，這關于(yu)單相(xiang)接(jie)(jie)地(di)(di)毛病(bing)(bing)(bing)檢測來說正確選線(xian)是困難的(de)。

10KV電(dian)(dian)(dian)力體(ti)系(xi)大(da)(da)多是小電(dian)(dian)(dian)流(liu)接(jie)地(di)(di)(di)體(ti)系(xi)，當體(ti)系(xi)中(zhong)產(chan)(chan)(chan)生單(dan)相接(jie)地(di)(di)(di)時(shi)，不(bu)會產(chan)(chan)(chan)生很(hen)大(da)(da)的(de)短(duan)路電(dian)(dian)(dian)流(liu)。毛(mao)病點電(dian)(dian)(dian)弧(hu)經(jing)過(guo)消弧(hu)線(xian)圈(quan)補償感抗后能(neng)夠自行平(ping)息(xi)，熄(xi)弧(hu)后接(jie)地(di)(di)(di)址(zhi)絕緣(yuan)可自行康復，能(neng)主動鏟(chan)除單(dan)相接(jie)地(di)(di)(di)毛(mao)病。如(ru)果間歇性弧(hu)光不(bu)能(neng)平(ping)息(xi)，長時(shi)間帶電(dian)(dian)(dian)運轉會造成(cheng)諧振過(guo)電(dian)(dian)(dian)壓(ya)，產(chan)(chan)(chan)生幾倍于正(zheng)常的(de)過(guo)電(dian)(dian)(dian)壓(ya)，過(guo)電(dian)(dian)(dian)壓(ya)將進一(yi)步使(shi)線(xian)路上的(de)絕緣(yuan)層絕緣(yuan)子擊穿(chuan)，造成(cheng)嚴峻的(de)相間短(duan)路事端。不(bu)管是哪種情(qing)況都須要(yao)對(dui)毛(mao)病點定位，隨(sui)后趕快組(zu)織維(wei)修毛(mao)病點。單(dan)相接(jie)地(di)(di)(di)毛(mao)病產(chan)(chan)(chan)生后能(neng)維(wei)持(chi)運轉一(yi)定時(shi)間，因此大(da)(da)大(da)(da)提高了供電(dian)(dian)(dian)牢靠性。

配(pei)電開關(guan)的一(yi)二次(ci)成套(tao)設(she)備的技能研發，是(shi)為了更(geng)好(hao)的標準配(pei)網主設(she)備，保障建(jian)造過程中一(yi)二次(ci)同(tong)步建(jian)造投運，防止后(hou)期(qi)的改造，關(guan)于縮(suo)短施工期(qi)、提(ti)高牢靠(kao)性及運維功率(lv)、簡(jian)化投標流程等具有重要意義。