一、電力電容器常見的規格和型號

1、電力電容器的規格

（1）額定(ding)電壓(ya)：電容(rong)器(qi)(qi)有高壓(ya)電容(rong)器(qi)(qi)、低壓(ya)電容(rong)器(qi)(qi)之分。以低壓(ya)電容(rong)器(qi)(qi)為例，常見額定(ding)電壓(ya)等級有250V、440V、480V、525V、690V等。

（2）額定(ding)容量：電力(li)電容器(qi)的(de)額定(ding)容量，一般在10Kvar-60Kvar之間。常見的(de)額定(ding)容量有10Kvar、15Kvar、20Kvar、25Kvar、30Kvar、40Kvar、50Kvar、60Kvar等。

（3）相數：電(dian)(dian)力系(xi)統中，電(dian)(dian)容(rong)(rong)器(qi)有三相電(dian)(dian)容(rong)(rong)器(qi)和單相電(dian)(dian)容(rong)(rong)器(qi)。進(jin)行無功補(bu)償的電(dian)(dian)力電(dian)(dian)容(rong)(rong)器(qi)，多(duo)為三相電(dian)(dian)容(rong)(rong)器(qi)。當企業需(xu)要進(jin)行分(fen)相補(bu)償時，就需(xu)要使用單相電(dian)(dian)容(rong)(rong)器(qi)。

2、電力電容器常見的型號

在(zai)(zai)供電(dian)系(xi)統中(zhong)，我們(men)經常會看到以(yi)下(xia)電(dian)力電(dian)容器(qi)型(xing)號。BZMJ系(xi)列(lie)(lie)電(dian)容器(qi)，代(dai)表(biao)油式介質(zhi)的(de)并(bing)聯電(dian)容器(qi)，幾乎被市場淘汰；BKMJ系(xi)列(lie)(lie)電(dian)容器(qi)，代(dai)表(biao)干式硅(gui)油介質(zhi)的(de)并(bing)聯電(dian)容器(qi)，它在(zai)(zai)電(dian)網中(zhong)應用較(jiao)多；BSMJ系(xi)列(lie)(lie)電(dian)容器(qi)，代(dai)表(biao)微(wei)晶蠟(la)填(tian)充的(de)并(bing)聯電(dian)容器(qi)，市場中(zhong)有(you)不(bu)少(shao)企(qi)業在(zai)(zai)使(shi)用；AKMJ/ASMJ系(xi)列(lie)(lie)電(dian)容器(qi)，代(dai)表(biao)硅(gui)油/微(wei)晶蠟(la)填(tian)充的(de)濾波(bo)電(dian)容器(qi)，它們(men)可以(yi)在(zai)(zai)有(you)諧波(bo)的(de)場景中(zhong)使(shi)用。

二、電力電容器接線方式

1、星形接線方式

在電(dian)(dian)(dian)力系統(tong)中(zhong)(zhong)，星形(xing)接線(xian)(xian)可分(fen)為帶(dai)(dai)中(zhong)(zhong)性(xing)線(xian)(xian)和不帶(dai)(dai)中(zhong)(zhong)性(xing)線(xian)(xian)兩(liang)種情況。其(qi)中(zhong)(zhong)帶(dai)(dai)中(zhong)(zhong)性(xing)線(xian)(xian)方式(shi)(shi)的(de)優勢在于可以(yi)(yi)進行分(fen)相(xiang)(xiang)(xiang)投切，從(cong)而(er)補償電(dian)(dian)(dian)網(wang)負荷的(de)三相(xiang)(xiang)(xiang)不平衡。對于不帶(dai)(dai)中(zhong)(zhong)性(xing)線(xian)(xian)方式(shi)(shi)來說，其(qi)需(xu)要兩(liang)相(xiang)(xiang)(xiang)電(dian)(dian)(dian)容(rong)才能形(xing)成回路(lu)。和星形(xing)帶(dai)(dai)中(zhong)(zhong)性(xing)線(xian)(xian)方式(shi)(shi)相(xiang)(xiang)(xiang)同的(de)是，它們的(de)三相(xiang)(xiang)(xiang)基(ji)波電(dian)(dian)(dian)壓對稱，所以(yi)(yi)三相(xiang)(xiang)(xiang)基(ji)波電(dian)(dian)(dian)流合成值為零；而(er)3次諧波電(dian)(dian)(dian)流則由(you)線(xian)(xian)電(dian)(dian)(dian)壓決定，三相(xiang)(xiang)(xiang)電(dian)(dian)(dian)壓的(de)3次諧波大小相(xiang)(xiang)(xiang)等，方向相(xiang)(xiang)(xiang)同，在線(xian)(xian)電(dian)(dian)(dian)壓中(zhong)(zhong)相(xiang)(xiang)(xiang)互(hu)抵消，因此電(dian)(dian)(dian)容(rong)支路(lu)中(zhong)(zhong)沒有(you)3次諧波電(dian)(dian)(dian)流。

2、三角形接線

在(zai)(zai)電力系統中，三(san)(san)角(jiao)形(xing)(xing)(xing)接法按(an)照星形(xing)(xing)(xing)三(san)(san)角(jiao)形(xing)(xing)(xing)變換原理，可以轉化為星形(xing)(xing)(xing)接線。當電力系統中存(cun)在(zai)(zai)三(san)(san)相不平(ping)衡的負(fu)載(zai)時，可令各相電容(rong)值不等，根據各相負(fu)荷進行分(fen)相補償。在(zai)(zai)電力補償電容(rong)器總(zong)無功容(rong)量(liang)相等的情況下，三(san)(san)角(jiao)形(xing)(xing)(xing)接線和星形(xing)(xing)(xing)無中性(xing)線方(fang)式度外電路表(biao)示的特性(xing)相同(tong)。在(zai)(zai)實(shi)際進行無功補償時，企業采用三(san)(san)角(jiao)形(xing)(xing)(xing)接線方(fang)式更多。

星形接線和三角形接線，是品牌電力電容器常(chang)見的接線方(fang)式(shi)。目前企業常(chang)用(yong)的接線方(fang)式(shi)是三角(jiao)形(xing)接線，因為(wei)它可以實現分相補(bu)償(chang)，解決三相不平衡的問(wen)題。