改進成(cheng)套設備的功(gong)能(neng)，添(tian)加單相接地(di)(di)毛病(bing)就近檢(jian)測和(he)阻(zu)隔，關于中(zhong)性點不(bu)接地(di)(di)和(he)經(jing)消(xiao)弧線圈接地(di)(di)毛病(bing)處理辦法(fa)也(ye)將是一項重大的技能(neng)革(ge)新(xin)。提升配網(wang)單相接地(di)(di)毛病(bing)選線成(cheng)功(gong)率、探索完善接地(di)(di)毛病(bing)阻(zu)隔技能(neng)。

現(xian)有(you)接(jie)(jie)(jie)地毛病(bing)(bing)選(xuan)線維(wei)護主要選(xuan)用(yong)中性點經小(xiao)(xiao)電阻(zu)接(jie)(jie)(jie)地辦法下的(de)零(ling)序電流維(wei)護或中性點非有(you)用(yong)接(jie)(jie)(jie)地辦法下的(de)小(xiao)(xiao)電流接(jie)(jie)(jie)地選(xuan)線維(wei)護，在面臨高(gao)阻(zu)、間歇性等(deng)毛病(bing)(bing)時，仍存在選(xuan)線準(zhun)確(que)率(lv)差，無法有(you)用(yong)阻(zu)隔毛病(bing)(bing)，存在巨大隱(yin)患。當高(gao)阻(zu)接(jie)(jie)(jie)地到(dao)達1000歐姆以(yi)上時，設備動(dong)作牢靠率(lv)80%；設備動(dong)作后(hou)選(xuan)線準(zhun)確(que)率(lv)90%。毛病(bing)(bing)檢測精度差開關拒動(dong)誤動(dong)率(lv)高(gao)，導致配(pei)電網牢靠性下降(jiang)。

從配電(dian)(dian)(dian)網(wang)規劃(hua)規劃(hua)下手(shou)合理(li)的(de)(de)(de)選(xuan)(xuan)擇中性點(dian)接(jie)(jie)地辦(ban)法(fa)，開展高(gao)低(di)壓開關(guan)柜成(cheng)套(tao)設(she)備(bei)技能(neng)研究，開展小電(dian)(dian)(dian)流(liu)接(jie)(jie)地體(ti)系單相(xiang)接(jie)(jie)地毛病(bing)(bing)選(xuan)(xuan)線(xian)辦(ban)法(fa)的(de)(de)(de)研究，進一步提高(gao)單相(xiang)接(jie)(jie)地毛病(bing)(bing)選(xuan)(xuan)線(xian)的(de)(de)(de)準確率。選(xuan)(xuan)用小電(dian)(dian)(dian)流(liu)接(jie)(jie)地體(ti)系的(de)(de)(de)區域要裝(zhuang)備(bei)接(jie)(jie)地毛病(bing)(bing)線(xian)段判別與(yu)阻(zu)隔設(she)備(bei)。國家(jia)電(dian)(dian)(dian)網(wang)正(zheng)(zheng)在(zai)(zai)修訂(ding)的(de)(de)(de)《配電(dian)(dian)(dian)網(wang)技能(neng)導則》規則變(bian)電(dian)(dian)(dian)站要安裝(zhuang)牢靠(kao)的(de)(de)(de)選(xuan)(xuan)線(xian)設(she)備(bei)，在(zai)(zai)10s內切除(chu)的(de)(de)(de)接(jie)(jie)地毛病(bing)(bing)。在(zai)(zai)小電(dian)(dian)(dian)流(liu)接(jie)(jie)地配電(dian)(dian)(dian)網(wang)中，消弧線(xian)圈將接(jie)(jie)地電(dian)(dian)(dian)流(liu)降至只(zhi)有(you)幾個安培，盡管(guan)有(you)利于(yu)熄(xi)弧，但(dan)也(ye)使毛病(bing)(bing)線(xian)路(lu)(lu)的(de)(de)(de)工頻(pin)零(ling)序(xu)電(dian)(dian)(dian)流(liu)往(wang)往(wang)小于(yu)非(fei)(fei)毛病(bing)(bing)線(xian)路(lu)(lu)的(de)(de)(de)電(dian)(dian)(dian)流(liu)并且(qie)二者的(de)(de)(de)相(xiang)位也(ye)根本(ben)相(xiang)同，毛病(bing)(bing)線(xian)路(lu)(lu)工頻(pin)零(ling)序(xu)電(dian)(dian)(dian)流(liu)沒有(you)了差異(yi)與(yu)非(fei)(fei)毛病(bing)(bing)線(xian)路(lu)(lu)的(de)(de)(de)特征，這關(guan)于(yu)單相(xiang)接(jie)(jie)地毛病(bing)(bing)檢測來(lai)說(shuo)正(zheng)(zheng)確選(xuan)(xuan)線(xian)是困難(nan)的(de)(de)(de)。

10KV電(dian)(dian)力體系大多是小電(dian)(dian)流(liu)接(jie)(jie)地(di)體系，當體系中產生單相接(jie)(jie)地(di)時(shi)，不(bu)會(hui)產生很大的短路電(dian)(dian)流(liu)。毛病(bing)點(dian)電(dian)(dian)弧(hu)(hu)經過(guo)(guo)消弧(hu)(hu)線(xian)圈補償感抗后(hou)(hou)能(neng)夠自行平(ping)息，熄弧(hu)(hu)后(hou)(hou)接(jie)(jie)地(di)址絕緣可自行康復(fu)，能(neng)主動鏟除(chu)單相接(jie)(jie)地(di)毛病(bing)。如果間(jian)歇性弧(hu)(hu)光不(bu)能(neng)平(ping)息，長(chang)時(shi)間(jian)帶電(dian)(dian)運轉(zhuan)會(hui)造(zao)成(cheng)諧振過(guo)(guo)電(dian)(dian)壓，產生幾倍于正常(chang)的過(guo)(guo)電(dian)(dian)壓，過(guo)(guo)電(dian)(dian)壓將進一步使(shi)線(xian)路上的絕緣層絕緣子擊穿，造(zao)成(cheng)嚴(yan)峻的相間(jian)短路事(shi)端。不(bu)管是哪(na)種情況都須要對毛病(bing)點(dian)定(ding)位，隨后(hou)(hou)趕(gan)快組織維(wei)(wei)修(xiu)毛病(bing)點(dian)。單相接(jie)(jie)地(di)毛病(bing)產生后(hou)(hou)能(neng)維(wei)(wei)持運轉(zhuan)一定(ding)時(shi)間(jian)，因此大大提高了供電(dian)(dian)牢(lao)靠性。

配電開關(guan)的(de)一(yi)二次(ci)成套設備的(de)技能研發(fa)，是(shi)為(wei)了更(geng)好的(de)標(biao)準配網主設備，保障建(jian)(jian)造(zao)過(guo)程中一(yi)二次(ci)同步建(jian)(jian)造(zao)投運，防止后期(qi)(qi)的(de)改造(zao)，關(guan)于縮短施工期(qi)(qi)、提高牢(lao)靠性及運維功(gong)率、簡化(hua)投標(biao)流程等具有(you)重要意(yi)義。