無(wu)功(gong)(gong)補償(chang)投(tou)(tou)切(qie)開(kai)關顧(gu)名(ming)思義是(shi)用(yong)來在(zai)無(wu)功(gong)(gong)補償(chang)裝置中控制(zhi)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)投(tou)(tou)入與切(qie)除(chu)的元件，無(wu)功(gong)(gong)補償(chang)投(tou)(tou)切(qie)元件又(you)分為很多種(zhong)類(lei)(lei)，大致可以(yi)分為機械開(kai)關類(lei)(lei)和電(dian)(dian)(dian)(dian)子(zi)開(kai)關類(lei)(lei)。剛(gang)開(kai)始應用(yong)于(yu)低壓(ya)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)投(tou)(tou)切(qie)的開(kai)關是(shi)交流(liu)(liu)接觸器(qi)，這是(shi)一種(zhong)傳統的電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)投(tou)(tou)切(qie)方式(shi)，由于(yu)三(san)相交流(liu)(liu)電(dian)(dian)(dian)(dian)的相位(wei)互成120°，對交流(liu)(liu)接觸器(qi)投(tou)(tou)切(qie)控制(zhi)，理論上不存在(zai) 優(you)操作相位(wei)點（即(ji)投(tou)(tou)切(qie)瞬時不可選擇性(xing)），使得它(ta)投(tou)(tou)入或切(qie)除(chu)電(dian)(dian)(dian)(dian)網時，要產生一個(ge)暫態的過渡過程，又(you)因電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)是(shi)電(dian)(dian)(dian)(dian)壓(ya)不能(neng)瞬變(bian)的器(qi)件，并聯電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)由交流(liu)(liu)接觸器(qi)投(tou)(tou)切(qie)電(dian)(dian)(dian)(dian)網時，由于(yu)其相位(wei)點是(shi)隨機的，所以(yi)會產生幅(fu)值很大、頻(pin)率很高的浪涌電(dian)(dian)(dian)(dian)流(liu)(liu)（涌流(liu)(liu) 大時可能(neng)超過100倍電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)額(e)定(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)）。

汽車生產線無功補償(chang)柜的主要作用

將(jiang)無功(gong)(gong)補(bu)(bu)償技(ji)術(shu)用(yong)(yong)于(yu)高(gao)壓系(xi)統(tong)領域(yu)。目前無功(gong)(gong)補(bu)(bu)償技(ji)術(shu)還(huan)主(zhu)要用(yong)(yong)于(yu)低壓系(xi)統(tong)，高(gao)壓系(xi)統(tong)由于(yu)受到晶閘管(guan)耐(nai)壓水(shui)平的限制(zhi)，是(shi)通過變(bian)壓器接入(ru)的，如(ru)用(yong)(yong)于(yu)電(dian)氣(qi)化(hua)鐵道牽引(yin)變(bian)電(dian)所等(deng)。研制(zhi)高(gao)壓動態無功(gong)(gong)補(bu)(bu)償的裝置則具有重要意義，關鍵問題(ti)是(shi)要解決補(bu)(bu)償裝置晶閘管(guan)和(he)二極管(guan)的耐(nai)壓，即多(duo)個晶閘管(guan)元件串聯(lian)及均壓、觸發控制(zhi)的同步性等(deng)。

總(zong)結：電(dian)容器在變(bian)配(pei)電(dian)所(suo)各種設備中屬于可(ke)靠性比(bi)較(jiao)(jiao)薄(bo)弱的(de)電(dian)器，它比(bi)同級電(dian)壓的(de)其他設備的(de)絕緣較(jiao)(jiao)為薄(bo)弱，內部元件發熱較(jiao)(jiao)多，而散(san)熱情況(kuang)又欠佳，內部故障(zhang)機會(hui)較(jiao)(jiao)多，制造(zao)電(dian)力(li)電(dian)容器內部材料的(de)可(ke)燃物成分又大，所(suo)以運(yun)行中極易著火(huo)。因此，對電(dian)力(li)電(dian)容器的(de)運(yun)行應盡可(ke)能(neng)地(di)創造(zao)良好的(de)低溫和通(tong)風條件。