一、電力電容器常見的規格和型號

1、電力電容器的規格

（1）額定電壓：電容(rong)器有(you)高壓電容(rong)器、低壓電容(rong)器之分(fen)。以(yi)低壓電容(rong)器為例(li)，常見(jian)額定電壓等級(ji)有(you)250V、440V、480V、525V、690V等。

（2）額(e)(e)定容(rong)量：電力(li)電容(rong)器的額(e)(e)定容(rong)量，一般在10Kvar-60Kvar之間(jian)。常見的額(e)(e)定容(rong)量有10Kvar、15Kvar、20Kvar、25Kvar、30Kvar、40Kvar、50Kvar、60Kvar等。

（3）相(xiang)數：電(dian)(dian)(dian)力系統中，電(dian)(dian)(dian)容器(qi)有三相(xiang)電(dian)(dian)(dian)容器(qi)和單(dan)相(xiang)電(dian)(dian)(dian)容器(qi)。進(jin)行(xing)無(wu)功補償的電(dian)(dian)(dian)力電(dian)(dian)(dian)容器(qi)，多為三相(xiang)電(dian)(dian)(dian)容器(qi)。當企業需(xu)要進(jin)行(xing)分相(xiang)補償時，就需(xu)要使用單(dan)相(xiang)電(dian)(dian)(dian)容器(qi)。

2、電力電容器常見的型號

在(zai)供電(dian)(dian)系(xi)統中(zhong)，我們經(jing)常(chang)會看到以(yi)下電(dian)(dian)力電(dian)(dian)容(rong)(rong)器(qi)(qi)型號(hao)。BZMJ系(xi)列(lie)電(dian)(dian)容(rong)(rong)器(qi)(qi)，代(dai)表(biao)(biao)油(you)(you)式介(jie)質的并聯電(dian)(dian)容(rong)(rong)器(qi)(qi)，幾乎(hu)被市場淘汰(tai)；BKMJ系(xi)列(lie)電(dian)(dian)容(rong)(rong)器(qi)(qi)，代(dai)表(biao)(biao)干式硅油(you)(you)介(jie)質的并聯電(dian)(dian)容(rong)(rong)器(qi)(qi)，它(ta)在(zai)電(dian)(dian)網中(zhong)應用(yong)較多(duo)；BSMJ系(xi)列(lie)電(dian)(dian)容(rong)(rong)器(qi)(qi)，代(dai)表(biao)(biao)微晶(jing)蠟填充的并聯電(dian)(dian)容(rong)(rong)器(qi)(qi)，市場中(zhong)有(you)不少企業在(zai)使(shi)用(yong)；AKMJ/ASMJ系(xi)列(lie)電(dian)(dian)容(rong)(rong)器(qi)(qi)，代(dai)表(biao)(biao)硅油(you)(you)/微晶(jing)蠟填充的濾(lv)波電(dian)(dian)容(rong)(rong)器(qi)(qi)，它(ta)們可以(yi)在(zai)有(you)諧波的場景中(zhong)使(shi)用(yong)。

二、電力電容器接線方式

1、星形接線方式

在電(dian)(dian)(dian)力系統中(zhong)(zhong)(zhong)，星(xing)形(xing)(xing)接線可(ke)分為帶(dai)中(zhong)(zhong)(zhong)性(xing)(xing)線和不帶(dai)中(zhong)(zhong)(zhong)性(xing)(xing)線兩種情況(kuang)。其中(zhong)(zhong)(zhong)帶(dai)中(zhong)(zhong)(zhong)性(xing)(xing)線方式的(de)優勢在于可(ke)以(yi)進行分相(xiang)(xiang)投切，從而補(bu)償(chang)電(dian)(dian)(dian)網負荷(he)的(de)三相(xiang)(xiang)不平衡(heng)。對于不帶(dai)中(zhong)(zhong)(zhong)性(xing)(xing)線方式來說(shuo)，其需要(yao)兩相(xiang)(xiang)電(dian)(dian)(dian)容才能(neng)形(xing)(xing)成回路(lu)。和星(xing)形(xing)(xing)帶(dai)中(zhong)(zhong)(zhong)性(xing)(xing)線方式相(xiang)(xiang)同的(de)是，它們的(de)三相(xiang)(xiang)基波(bo)電(dian)(dian)(dian)壓(ya)對稱，所以(yi)三相(xiang)(xiang)基波(bo)電(dian)(dian)(dian)流(liu)合成值為零；而3次諧波(bo)電(dian)(dian)(dian)流(liu)則由線電(dian)(dian)(dian)壓(ya)決定，三相(xiang)(xiang)電(dian)(dian)(dian)壓(ya)的(de)3次諧波(bo)大小(xiao)相(xiang)(xiang)等，方向(xiang)相(xiang)(xiang)同，在線電(dian)(dian)(dian)壓(ya)中(zhong)(zhong)(zhong)相(xiang)(xiang)互(hu)抵消，因此電(dian)(dian)(dian)容支路(lu)中(zhong)(zhong)(zhong)沒有3次諧波(bo)電(dian)(dian)(dian)流(liu)。

2、三角形接線

在電(dian)(dian)(dian)力(li)系統(tong)中(zhong)，三(san)(san)(san)(san)角(jiao)(jiao)形(xing)(xing)(xing)接法按(an)照(zhao)星形(xing)(xing)(xing)三(san)(san)(san)(san)角(jiao)(jiao)形(xing)(xing)(xing)變換原理，可以轉化為星形(xing)(xing)(xing)接線(xian)。當電(dian)(dian)(dian)力(li)系統(tong)中(zhong)存(cun)在三(san)(san)(san)(san)相(xiang)不平衡(heng)的(de)負載時，可令各相(xiang)電(dian)(dian)(dian)容(rong)(rong)值不等(deng)，根據各相(xiang)負荷進(jin)行分(fen)相(xiang)補(bu)償(chang)。在電(dian)(dian)(dian)力(li)補(bu)償(chang)電(dian)(dian)(dian)容(rong)(rong)器總無功容(rong)(rong)量相(xiang)等(deng)的(de)情況(kuang)下，三(san)(san)(san)(san)角(jiao)(jiao)形(xing)(xing)(xing)接線(xian)和星形(xing)(xing)(xing)無中(zhong)性線(xian)方(fang)式(shi)度外電(dian)(dian)(dian)路表示(shi)的(de)特性相(xiang)同。在實際進(jin)行無功補(bu)償(chang)時，企業采(cai)用三(san)(san)(san)(san)角(jiao)(jiao)形(xing)(xing)(xing)接線(xian)方(fang)式(shi)更多。

星形接線和三角形接線，是品牌電力電容器常(chang)見的(de)接線方(fang)式。目前企業常(chang)用(yong)的(de)接線方(fang)式是三(san)角形接線，因為它可以實現分相補償，解決(jue)三(san)相不平衡的(de)問(wen)題。