產(chan)品簡介：
中性(xing)點(dian)非(fei)直接(jie)接(jie)地系統(tong)，形成弧(hu)光(guang)接(jie)地過電(dian)(dian)(dian)壓(ya)的(de)(de)基礎是間歇性(xing)電(dian)(dian)(dian)弧(hu)。當中性(xing)點(dian)非(fei)直接(jie)接(jie)地系統(tong)發生單相(xiang)間歇性(xing)弧(hu)光(guang)接(jie)地故障(zhang)(zhang)時，由于電(dian)(dian)(dian)弧(hu)多次不斷的(de)(de)熄(xi)滅和重(zhong)(zhong)燃，導致系統(tong)對(dui)地電(dian)(dian)(dian)容(rong)上的(de)(de)電(dian)(dian)(dian)荷多次不斷的(de)(de)積累和重(zhong)(zhong)新再(zai)分配，在非(fei)故障(zhang)(zhang)相(xiang)的(de)(de)電(dian)(dian)(dian)感電(dian)(dian)(dian)容(rong)回路(lu)(lu)上引起高頻(pin)振(zhen)蕩過電(dian)(dian)(dian)壓(ya)。對(dui)于架空線(xian)路(lu)(lu)，過電(dian)(dian)(dian)壓(ya)幅(fu)值(zhi)一般可(ke)達3.1～3.5 倍相(xiang)電(dian)(dian)(dian)壓(ya)。 以電(dian)(dian)(dian)纜線(xian)路(lu)(lu)為主的(de)(de)供電(dian)(dian)(dian)網絕緣(yuan)擊穿或電(dian)(dian)(dian)弧(hu)高頻(pin)電(dian)(dian)(dian)流過零點(dian)電(dian)(dian)(dian)弧(hu)無法熄(xi)滅的(de)(de)可(ke)能性(xing)大大提高，電(dian)(dian)(dian)纜線(xian)路(lu)(lu)弧(hu)光(guang)接(jie)地時，非(fei)故障(zhang)(zhang)相(xiang)的(de)(de)過電(dian)(dian)(dian)壓(ya)可(ke)達4～71 倍。
高幅值的過電壓(ya)(ya)加劇了(le)電纜(lan)等固體絕緣(yuan)的積累(lei)性破壞，同時弧光接地(di)過電壓(ya)(ya)還將(jiang)導致PT 燒(shao)壞或保(bao)險熔斷，更(geng)為嚴重(zhong)的將(jiang)導致避雷器爆炸。
解決弧(hu)(hu)光(guang)接(jie)(jie)地(di)(di)(di)(di)問題早些時候(hou)采用(yong)的是改變系統(tong)中性點接(jie)(jie)地(di)(di)(di)(di)方式，利用(yong)小電(dian)(dian)阻接(jie)(jie)地(di)(di)(di)(di)，犧牲供(gong)電(dian)(dian)可(ke)靠性來解決弧(hu)(hu)光(guang)接(jie)(jie)地(di)(di)(di)(di)；后來發展為(wei)采用(yong)消(xiao)(xiao)(xiao)(xiao)弧(hu)(hu)線(xian)圈(quan)原理，利用(yong)電(dian)(dian)感和電(dian)(dian)容的電(dian)(dian)壓(ya)電(dian)(dian)流(liu)特性不(bu)同，采用(yong)電(dian)(dian)感電(dian)(dian)流(liu)來補償電(dian)(dian)容電(dian)(dian)流(liu)，由于(yu)弧(hu)(hu)光(guang)接(jie)(jie)地(di)(di)(di)(di)為(wei)高頻(pin)量，所以按工(gong)頻(pin)設(she)計(ji)的消(xiao)(xiao)(xiao)(xiao)弧(hu)(hu)線(xian)圈(quan)無法(fa)補償高頻(pin)電(dian)(dian)流(liu)，相(xiang)反由于(yu)線(xian)圈(quan)的接(jie)(jie)入還(huan)將(jiang)產(chan)(chan)生許多副作用(yong)，比如(ru)：選(xuan)線(xian)不(bu)準，容易產(chan)(chan)生諧(xie)振，傳(chuan)遞(di)過電(dian)(dian)壓(ya)等等。鑒(jian)于(yu)以上分析，目前比較理想的消(xiao)(xiao)(xiao)(xiao)除(chu)弧(hu)(hu)光(guang)接(jie)(jie)地(di)(di)(di)(di)產(chan)(chan)品還(huan)是消(xiao)(xiao)(xiao)(xiao)弧(hu)(hu)消(xiao)(xiao)(xiao)(xiao)諧(xie)及(ji)過電(dian)(dian)壓(ya)保護(hu)裝(zhuang)(zhuang)置(zhi)(zhi)。我公司研制生產(chan)(chan)的QMS 系列消(xiao)(xiao)(xiao)(xiao)弧(hu)(hu)消(xiao)(xiao)(xiao)(xiao)諧(xie)及(ji)過電(dian)(dian)壓(ya)保護(hu)裝(zhuang)(zhuang)置(zhi)(zhi)是根據(ju)傳(chuan)統(tong)的消(xiao)(xiao)(xiao)(xiao)弧(hu)(hu)及(ji)過電(dian)(dian)壓(ya)保護(hu)裝(zhuang)(zhuang)置(zhi)(zhi)及(ji)消(xiao)(xiao)(xiao)(xiao)弧(hu)(hu)線(xian)圈(quan)的優缺點，研制開發出的新型(xing)產(chan)(chan)品。
功能簡介(jie)：
我司最新研發(fa)的(de)(de)QMS-9950 PT云在線(xian)智慧測控(kong)(kong)(kong)裝(zhuang)置巧妙的(de)(de)將(jiang)測量模塊(kuai)、保(bao)(bao)護(hu)模塊(kuai)、顯示模塊(kuai)和(he)通(tong)訊模塊(kuai)組合成一個(ge)智慧測控(kong)(kong)(kong)系統(tong)，具有多(duo)功能(neng)、數字化(hua)(hua)、網絡(luo)化(hua)(hua)、智能(neng)化(hua)(hua)，結(jie)構(gou)緊(jin)湊、易于維(wei)護(hu)等特點。它(ta)可以滿足電力工業(ye)未來的(de)(de)需求、簡化(hua)(hua)開關柜面板(ban)結(jie)構(gou)設計、美化(hua)(hua)面板(ban)布局，是一款實現(xian)配電房自動化(hua)(hua)監控(kong)(kong)(kong)運維(wei)系統(tong)“信(xin)息化(hua)(hua)、自動化(hua)(hua)、集(ji)成一體化(hua)(hua)”的(de)(de)測控(kong)(kong)(kong)終端。信(xin)號采集(ji)部分采用32位高(gao)可靠性(xing)工業(ye)級DSP芯片,將(jiang)微機(ji)保(bao)(bao)護(hu)技(ji)術用于智能(neng)信(xin)息采集(ji)，利用DSP的(de)(de)快速、準確(que)的(de)(de)數據處(chu)理能(neng)力實現(xian)傅立葉(xie)分析(xi)，其選相準確(que)。通(tong)過(guo)對(dui)PT三相電壓及頻率，并結(jie)合系統(tong)母線(xian)三相電壓，對(dui)電網各種接(jie)地狀態能(neng)快速分析(xi)，準確(que)地辨出：電網弧(hu)光接(jie)地（站內站外弧(hu)光判(pan)斷專利技(ji)術）、過(guo)渡過(guo)程及單相金屬接(jie)地、0~300Hz各頻率諧(xie)振。
