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(e)定(ding)電壓(ya)：電容(rong)(rong)器有高壓(ya)電容(rong)(rong)器、低(di)壓(ya)電容(rong)(rong)器之(zhi)分。以(yi)低(di)壓(ya)電容(rong)(rong)器為例，常見額(e)定(ding)電壓(ya)等(deng)級有250V、440V、480V、525V、690V等(deng)。

（2）額定(ding)容量：電(dian)力電(dian)容器(qi)的額定(ding)容量，一(yi)般在10Kvar-60Kvar之間。常見的額定(ding)容量有10Kvar、15Kvar、20Kvar、25Kvar、30Kvar、40Kvar、50Kvar、60Kvar等。

（3）相(xiang)數：電(dian)(dian)(dian)力系統(tong)中(zhong)，電(dian)(dian)(dian)容(rong)器(qi)有三(san)相(xiang)電(dian)(dian)(dian)容(rong)器(qi)和(he)單(dan)相(xiang)電(dian)(dian)(dian)容(rong)器(qi)。進(jin)行無功(gong)補(bu)償(chang)的(de)電(dian)(dian)(dian)力電(dian)(dian)(dian)容(rong)器(qi)，多(duo)為三(san)相(xiang)電(dian)(dian)(dian)容(rong)器(qi)。當企業需(xu)要進(jin)行分相(xiang)補(bu)償(chang)時(shi)，就需(xu)要使用(yong)單(dan)相(xiang)電(dian)(dian)(dian)容(rong)器(qi)。

2、電力電容器常見的型號

在(zai)供電(dian)(dian)系(xi)(xi)統中(zhong)(zhong)，我們(men)經常(chang)會看到(dao)以下電(dian)(dian)力電(dian)(dian)容(rong)器(qi)(qi)(qi)(qi)型號。BZMJ系(xi)(xi)列(lie)電(dian)(dian)容(rong)器(qi)(qi)(qi)(qi)，代表(biao)油式介質的并(bing)(bing)聯(lian)電(dian)(dian)容(rong)器(qi)(qi)(qi)(qi)，幾乎(hu)被(bei)市場(chang)(chang)淘汰(tai)；BKMJ系(xi)(xi)列(lie)電(dian)(dian)容(rong)器(qi)(qi)(qi)(qi)，代表(biao)干式硅(gui)油介質的并(bing)(bing)聯(lian)電(dian)(dian)容(rong)器(qi)(qi)(qi)(qi)，它(ta)在(zai)電(dian)(dian)網中(zhong)(zhong)應(ying)用(yong)(yong)(yong)較多；BSMJ系(xi)(xi)列(lie)電(dian)(dian)容(rong)器(qi)(qi)(qi)(qi)，代表(biao)微(wei)晶蠟(la)填充(chong)的并(bing)(bing)聯(lian)電(dian)(dian)容(rong)器(qi)(qi)(qi)(qi)，市場(chang)(chang)中(zhong)(zhong)有不少企(qi)業在(zai)使(shi)(shi)用(yong)(yong)(yong)；AKMJ/ASMJ系(xi)(xi)列(lie)電(dian)(dian)容(rong)器(qi)(qi)(qi)(qi)，代表(biao)硅(gui)油/微(wei)晶蠟(la)填充(chong)的濾(lv)波電(dian)(dian)容(rong)器(qi)(qi)(qi)(qi)，它(ta)們(men)可以在(zai)有諧(xie)波的場(chang)(chang)景中(zhong)(zhong)使(shi)(shi)用(yong)(yong)(yong)。

二、電力電容器接線方式

1、星形接線方式

在電(dian)(dian)(dian)(dian)(dian)力系統中(zhong)(zhong)，星形接線(xian)(xian)(xian)可分為帶中(zhong)(zhong)性(xing)線(xian)(xian)(xian)和不(bu)帶中(zhong)(zhong)性(xing)線(xian)(xian)(xian)兩(liang)種情況。其(qi)中(zhong)(zhong)帶中(zhong)(zhong)性(xing)線(xian)(xian)(xian)方式的(de)優勢在于(yu)可以(yi)進(jin)行分相(xiang)投切，從(cong)而(er)補(bu)償電(dian)(dian)(dian)(dian)(dian)網負荷的(de)三(san)相(xiang)不(bu)平衡。對于(yu)不(bu)帶中(zhong)(zhong)性(xing)線(xian)(xian)(xian)方式來說(shuo)，其(qi)需(xu)要兩(liang)相(xiang)電(dian)(dian)(dian)(dian)(dian)容才能形成回路。和星形帶中(zhong)(zhong)性(xing)線(xian)(xian)(xian)方式相(xiang)同的(de)是(shi)，它們的(de)三(san)相(xiang)基波(bo)電(dian)(dian)(dian)(dian)(dian)壓(ya)對稱，所以(yi)三(san)相(xiang)基波(bo)電(dian)(dian)(dian)(dian)(dian)流合成值(zhi)為零；而(er)3次諧波(bo)電(dian)(dian)(dian)(dian)(dian)流則由線(xian)(xian)(xian)電(dian)(dian)(dian)(dian)(dian)壓(ya)決定，三(san)相(xiang)電(dian)(dian)(dian)(dian)(dian)壓(ya)的(de)3次諧波(bo)大小相(xiang)等，方向相(xiang)同，在線(xian)(xian)(xian)電(dian)(dian)(dian)(dian)(dian)壓(ya)中(zhong)(zhong)相(xiang)互抵消，因此電(dian)(dian)(dian)(dian)(dian)容支路中(zhong)(zhong)沒(mei)有(you)3次諧波(bo)電(dian)(dian)(dian)(dian)(dian)流。

2、三角形接線

在電(dian)力系統(tong)中(zhong)，三角形接法按(an)照星形三角形變換原理，可以轉(zhuan)化為星形接線。當電(dian)力系統(tong)中(zhong)存(cun)在三相(xiang)不平衡的(de)負(fu)載時，可令各(ge)相(xiang)電(dian)容值不等，根據各(ge)相(xiang)負(fu)荷進行分相(xiang)補償(chang)。在電(dian)力補償(chang)電(dian)容器總(zong)無(wu)功(gong)容量(liang)相(xiang)等的(de)情況(kuang)下，三角形接線和(he)星形無(wu)中(zhong)性線方(fang)式度外電(dian)路表(biao)示(shi)的(de)特性相(xiang)同。在實際進行無(wu)功(gong)補償(chang)時，企業采用三角形接線方(fang)式更多。

星形接線和三角形接線，是品牌電力電容器常見(jian)的接線(xian)方式。目前(qian)企業(ye)常用的接線(xian)方式是三(san)(san)角形接線(xian)，因為它可(ke)以實現分相補(bu)償，解決三(san)(san)相不平衡的問題。