隨(sui)著經濟(ji)的(de)(de)(de)發(fa)展,，高(gao)(gao)科(ke)技設備(bei)獲得了(le)廣(guang)泛的(de)(de)(de)應用。這些設備(bei)對(dui)電(dian)(dian)(dian)(dian)壓變化很敏感,短時的(de)(de)(de)供電(dian)(dian)(dian)(dian)中斷或電(dian)(dian)(dian)(dian)壓有效(xiao)值(zhi)下降往往會造成(cheng)設備(bei)不正常運行(xing)，發(fa)生停機等事故。電(dian)(dian)(dian)(dian)壓暫降是針對(dui)這一問題而提出的(de)(de)(de)。所以，靜止(zhi)無功(gong)發(fa)生器的(de)(de)(de)補(bu)償(chang)作(zuo)(zuo)用對(dui)電(dian)(dian)(dian)(dian)力(li)系統有著非常重要的(de)(de)(de)意義，對(dui)電(dian)(dian)(dian)(dian)力(li)系統適當地用靜止(zhi)無功(gong)發(fa)生器，起到(dao)穩定電(dian)(dian)(dian)(dian)網電(dian)(dian)(dian)(dian)壓，提高(gao)(gao)功(gong)率因數，減小(xiao)網絡有功(gong)功(gong)率的(de)(de)(de)損耗，提高(gao)(gao)線(xian)路輸電(dian)(dian)(dian)(dian)能力(li)，平衡三相功(gong)率的(de)(de)(de)作(zuo)(zuo)用。

汽車(che)焊接(jie)車(che)間無功補償元器件(jian)優缺點分(fen)析

實際上(shang)就是靜態(tai)與動態(tai)補償的混(hun)合，一部分(fen)(fen)電容(rong)器(qi)組使用接觸器(qi)投(tou)切，而另一部分(fen)(fen)電容(rong)器(qi)組使用電力(li)半(ban)導體器(qi)件。這種方(fang)式在一定程度上(shang)可做到優勢(shi)互(hu)補，但就其控制技術，目前還未見(jian)到完善的控制軟件。該方(fang)式用于通常的網(wang)(wang)絡，如(ru)工礦、小區、域網(wang)(wang)改造，比起(qi)單一的投(tou)切方(fang)式拓寬了應用范(fan)圍，節能效(xiao)果更好。

三相電(dian)(dian)(dian)(dian)容(rong)的(de)基本(ben)原(yuan)則：1、欠補(bu)償(chang)(chang)：補(bu)償(chang)(chang)的(de)電(dian)(dian)(dian)(dian)容(rong)電(dian)(dian)(dian)(dian)流(liu)(liu)要求小(xiao)于被抵消的(de)電(dian)(dian)(dian)(dian)感電(dian)(dian)(dian)(dian)流(liu)(liu)。補(bu)償(chang)(chang)后(hou)仍(reng)存在一定(ding)數量(liang)的(de)感性(xing)無功電(dian)(dian)(dian)(dian)流(liu)(liu)，令cosφ小(xiao)于1但接近1。2、全補(bu)償(chang)(chang)：按(an)照感性(xing)實(shi)際負荷電(dian)(dian)(dian)(dian)流(liu)(liu)配置(zhi)電(dian)(dian)(dian)(dian)容(rong)器，IC=IL將感性(xing)電(dian)(dian)(dian)(dian)流(liu)(liu)用容(rong)性(xing)電(dian)(dian)(dian)(dian)流(liu)(liu)全部(bu)(bu)(bu)抵消掉(diao)，令cosφ等于1。3、過補(bu)償(chang)(chang)：大量(liang)投入電(dian)(dian)(dian)(dian)容(rong)器，在全部(bu)(bu)(bu)抵消掉(diao)電(dian)(dian)(dian)(dian)感電(dian)(dian)(dian)(dian)流(liu)(liu)后(hou)，還剩余(yu)一部(bu)(bu)(bu)分電(dian)(dian)(dian)(dian)容(rong)電(dian)(dian)(dian)(dian)流(liu)(liu)，此(ci)時原(yuan)感性(xing)負載(zai)轉化為容(rong)性(xing)負荷性(xing)質。功率因數cosφ仍(reng)然小(xiao)于1。