在低壓配電部分有進線柜、出線柜、當然也少不了電容(rong)補償柜，那么(me)電(dian)(dian)(dian)容(rong)補(bu)(bu)(bu)償柜(ju)有(you)什么(me)作(zuo)用呢，顧名思(si)意(yi)就是(shi)(shi)起電(dian)(dian)(dian)容(rong)補(bu)(bu)(bu)償作(zuo)用的(de)，先(xian)來(lai)(lai)看(kan)(kan)看(kan)(kan)電(dian)(dian)(dian)容(rong)補(bu)(bu)(bu)償原(yuan)理，電(dian)(dian)(dian)容(rong)補(bu)(bu)(bu)償時電(dian)(dian)(dian)容(rong)和負(fu)載是(shi)(shi)并聯連(lian)接的(de)，電(dian)(dian)(dian)容(rong)就和電(dian)(dian)(dian)庫(ku)一樣，當負(fu)載增大時，由(you)(you)于(yu)電(dian)(dian)(dian)源存在內阻，電(dian)(dian)(dian)源輸出(chu)電(dian)(dian)(dian)壓就會下(xia)(xia)降(jiang)，由(you)(you)于(yu)電(dian)(dian)(dian)容(rong)的(de)兩端要維(wei)持原(yuan)來(lai)(lai)的(de)電(dian)(dian)(dian)壓，也就是(shi)(shi)電(dian)(dian)(dian)容(rong)內的(de)電(dian)(dian)(dian)量要流出(chu)一部分，延(yan)緩了(le)電(dian)(dian)(dian)壓的(de)下(xia)(xia)降(jiang)趨勢，就是(shi)(shi)電(dian)(dian)(dian)容(rong)補(bu)(bu)(bu)償原(yuan)理。下(xia)(xia)面具(ju)體來(lai)(lai)看(kan)(kan)看(kan)(kan)低壓柜(ju)為什么(me)要進(jin)行電(dian)(dian)(dian)容(rong)補(bu)(bu)(bu)償。

在(zai)低壓(ya)電(dian)(dian)(dian)(dian)(dian)(dian)力系(xi)統中，有(you)(you)像(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)機及其它有(you)(you)線(xian)(xian)圈的(de)(de)(de)設(she)備(bei)(bei)、像(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)抗器(qi)等，這類設(she)備(bei)(bei)從(cong)線(xian)(xian)路中取得一(yi)(yi)(yi)部(bu)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)做(zuo)功(gong)(gong)(gong)(gong)外(wai)(wai)(wai)，還(huan)要(yao)從(cong)線(xian)(xian)路上(shang)消(xiao)耗(hao)一(yi)(yi)(yi)問好(hao)不做(zuo)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)感(gan)(gan)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)，這就(jiu)(jiu)(jiu)使(shi)得線(xian)(xian)路上(shang)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)要(yao)額外(wai)(wai)(wai)的(de)(de)(de)加(jia)(jia)大(da)一(yi)(yi)(yi)些，功(gong)(gong)(gong)(gong)率(lv)(lv)因(yin)數(shu)就(jiu)(jiu)(jiu)是(shi)用來衡(heng)量這一(yi)(yi)(yi)部(bu)分不做(zuo)功(gong)(gong)(gong)(gong)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)的(de)(de)(de)，當(dang)電(dian)(dian)(dian)(dian)(dian)(dian)感(gan)(gan)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)為(wei)0時，功(gong)(gong)(gong)(gong)率(lv)(lv)因(yin)數(shu)等于1，當(dang)電(dian)(dian)(dian)(dian)(dian)(dian)感(gan)(gan)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)所占比(bi)例(li)逐(zhu)漸增(zeng)大(da)時，功(gong)(gong)(gong)(gong)率(lv)(lv)因(yin)數(shu)逐(zhu)漸下(xia)降(jiang)，顯(xian)然(ran)，功(gong)(gong)(gong)(gong)率(lv)(lv)因(yin)數(shu)越低，線(xian)(xian)路額外(wai)(wai)(wai)負擔越大(da)，發電(dian)(dian)(dian)(dian)(dian)(dian)機、電(dian)(dian)(dian)(dian)(dian)(dian)力變壓(ya)器(qi)及配(pei)電(dian)(dian)(dian)(dian)(dian)(dian)裝(zhuang)置的(de)(de)(de)額外(wai)(wai)(wai)負擔也較大(da)，這除了(le)降(jiang)低線(xian)(xian)路及電(dian)(dian)(dian)(dian)(dian)(dian)力設(she)備(bei)(bei)的(de)(de)(de)利用率(lv)(lv)外(wai)(wai)(wai)，還(huan)會(hui)增(zeng)加(jia)(jia)線(xian)(xian)路上(shang)的(de)(de)(de)功(gong)(gong)(gong)(gong)率(lv)(lv)損(sun)耗(hao)，增(zeng)大(da)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)損(sun)失，降(jiang)低供電(dian)(dian)(dian)(dian)(dian)(dian)質量。為(wei)此(ci)，應當(dang)提高功(gong)(gong)(gong)(gong)率(lv)(lv)因(yin)數(shu)。提高功(gong)(gong)(gong)(gong)率(lv)(lv)因(yin)數(shu)最方便的(de)(de)(de)方法就(jiu)(jiu)(jiu)是(shi)并聯(lian)電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)，產(chan)生電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)抵(di)消(xiao)電(dian)(dian)(dian)(dian)(dian)(dian)感(gan)(gan)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)，將(jiang)(jiang)不做(zuo)功(gong)(gong)(gong)(gong)的(de)(de)(de)所謂無(wu)功(gong)(gong)(gong)(gong)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)減小到一(yi)(yi)(yi)定范圍以內。無(wu)功(gong)(gong)(gong)(gong)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)同有(you)(you)功(gong)(gong)(gong)(gong)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)一(yi)(yi)(yi)樣(yang)，是(shi)保證電(dian)(dian)(dian)(dian)(dian)(dian)能(neng)質量不可(ke)缺少的(de)(de)(de)部(bu)分，在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)力系(xi)統中應保持無(wu)功(gong)(gong)(gong)(gong)平(ping)衡(heng)，否則，將(jiang)(jiang)會(hui)使(shi)系(xi)統電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)降(jiang)低，設(she)備(bei)(bei)損(sun)壞，功(gong)(gong)(gong)(gong)率(lv)(lv)因(yin)數(shu)下(xia)降(jiang)，嚴重(zhong)時，會(hui)引起電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)崩潰(kui)，系(xi)統解裂，造成大(da)面積(ji)停電(dian)(dian)(dian)(dian)(dian)(dian)事(shi)故，因(yin)此(ci)，解決(jue)電(dian)(dian)(dian)(dian)(dian)(dian)網無(wu)功(gong)(gong)(gong)(gong)容(rong)(rong)(rong)量不足，增(zeng)裝(zhuang)無功補償設備，提高網絡的功率(lv)因數，對電網降損節(jie)電，安全可靠運行(xing)有(you)著(zhu)極為重要的意義。