一、電力電容器接線方式有哪幾種

1、星形接線方式

在(zai)電(dian)(dian)(dian)(dian)力(li)系(xi)統(tong)中(zhong)(zhong)(zhong)，星(xing)形(xing)(xing)接線(xian)(xian)(xian)可(ke)分(fen)為(wei)帶中(zhong)(zhong)(zhong)性(xing)線(xian)(xian)(xian)和不(bu)帶中(zhong)(zhong)(zhong)性(xing)線(xian)(xian)(xian)兩種情況。其(qi)中(zhong)(zhong)(zhong)帶中(zhong)(zhong)(zhong)性(xing)線(xian)(xian)(xian)方(fang)式(shi)的(de)優勢在(zai)于可(ke)以(yi)進(jin)行分(fen)相(xiang)(xiang)(xiang)投(tou)切，從而(er)補償電(dian)(dian)(dian)(dian)網(wang)負荷的(de)三相(xiang)(xiang)(xiang)不(bu)平衡。對于不(bu)帶中(zhong)(zhong)(zhong)性(xing)線(xian)(xian)(xian)方(fang)式(shi)來說，其(qi)需要兩相(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)容才能形(xing)(xing)成回路。和星(xing)形(xing)(xing)帶中(zhong)(zhong)(zhong)性(xing)線(xian)(xian)(xian)方(fang)式(shi)相(xiang)(xiang)(xiang)同(tong)的(de)是，它(ta)們的(de)三相(xiang)(xiang)(xiang)基(ji)波(bo)(bo)電(dian)(dian)(dian)(dian)壓對稱，所以(yi)三相(xiang)(xiang)(xiang)基(ji)波(bo)(bo)電(dian)(dian)(dian)(dian)流合成值為(wei)零；而(er)3次諧(xie)波(bo)(bo)電(dian)(dian)(dian)(dian)流則由線(xian)(xian)(xian)電(dian)(dian)(dian)(dian)壓決定，三相(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)壓的(de)3次諧(xie)波(bo)(bo)大小相(xiang)(xiang)(xiang)等，方(fang)向相(xiang)(xiang)(xiang)同(tong)，在(zai)線(xian)(xian)(xian)電(dian)(dian)(dian)(dian)壓中(zhong)(zhong)(zhong)相(xiang)(xiang)(xiang)互抵消，因(yin)此電(dian)(dian)(dian)(dian)容支(zhi)路中(zhong)(zhong)(zhong)沒有3次諧(xie)波(bo)(bo)電(dian)(dian)(dian)(dian)流。

2、三角形接線

在電(dian)(dian)(dian)力(li)系統中，三(san)(san)角形(xing)(xing)接法按(an)照星(xing)形(xing)(xing)三(san)(san)角形(xing)(xing)變(bian)換原(yuan)理，可(ke)以轉化為星(xing)形(xing)(xing)接線。當電(dian)(dian)(dian)力(li)系統中存(cun)在三(san)(san)相(xiang)(xiang)(xiang)不(bu)平(ping)衡的(de)負(fu)載(zai)時，可(ke)令(ling)各相(xiang)(xiang)(xiang)電(dian)(dian)(dian)容(rong)值不(bu)等，根據各相(xiang)(xiang)(xiang)負(fu)荷(he)進行(xing)分相(xiang)(xiang)(xiang)補償。在電(dian)(dian)(dian)力(li)補償電(dian)(dian)(dian)容(rong)器總無(wu)功容(rong)量相(xiang)(xiang)(xiang)等的(de)情況下，三(san)(san)角形(xing)(xing)接線和星(xing)形(xing)(xing)無(wu)中性線方(fang)式度外電(dian)(dian)(dian)路表示的(de)特性相(xiang)(xiang)(xiang)同。在實際進行(xing)無(wu)功補償時，企(qi)業采(cai)用三(san)(san)角形(xing)(xing)接線方(fang)式更多。

星(xing)形接線(xian)和三(san)角(jiao)形接線(xian)，是電(dian)力(li)補償電(dian)容(rong)器常見的(de)接線(xian)方(fang)式(shi)。目前企(qi)業常用的(de)接線(xian)方(fang)式(shi)是三(san)角(jiao)形接線(xian)，因為它可以實現分(fen)相補償，解決三(san)相不平(ping)衡的(de)問題。

二、電力電容器接線柱怎么接

電(dian)力電(dian)容器接(jie)(jie)(jie)線(xian)柱(zhu)一般有(you)三(san)(san)個(ge)，分別標注為U、V、W，分別對應電(dian)容器內(nei)部的三(san)(san)個(ge)電(dian)極(ji)。正確(que)的接(jie)(jie)(jie)法是(shi)U接(jie)(jie)(jie)在(zai)電(dian)容器內(nei)部的U極(ji)，V接(jie)(jie)(jie)在(zai)內(nei)部的V極(ji)，W接(jie)(jie)(jie)在(zai)內(nei)部的W極(ji)上。同時，還(huan)需要接(jie)(jie)(jie)地線(xian)連接(jie)(jie)(jie)電(dian)容器本體(ti)和接(jie)(jie)(jie)線(xian)盒之間(jian)的金屬橋。

三、電力電容器組的接線原則

1、必須確保電容能充分放電

電力電容器組停運檢修時必須保證各個電容器完全放電，才可以最大程度的避免觸電事故的發生。而(er)保證電(dian)(dian)(dian)容充分放電(dian)(dian)(dian)除了需要電(dian)(dian)(dian)容本身設(she)計有(you)一定的放電(dian)(dian)(dian)裝(zhuang)置(zhi)，使退出運行后(hou)的電(dian)(dian)(dian)力電(dian)(dian)(dian)容殘余電(dian)(dian)(dian)壓不(bu)超(chao)過65V，還需要工作人員檢修前用接(jie)地線再次放電(dian)(dian)(dian)。此外(wai)，當電力電容器(qi)組超過1000V時可(ke)以搭配電壓互感器(qi)使(shi)用，通過一次(ci)繞組進(jin)行(xing)再(zai)次(ci)放(fang)電。

2、可與放電裝置直接相連

電力電容器組可以與放電設備設置直接自動接通的接點，中間不用加裝任何開關或熔斷器設備。因為若電容(rong)放電回路安裝有熔斷器等器件，當熔斷器出(chu)現熔斷故障需要斷開時(shi)會(hui)對相關操作(zuo)人員造成安全危(wei)害。

3、電力電容需接地

當電容(rong)組接(jie)入(ru)電網時(shi)，每臺電容(rong)都應對(dui)地(di)絕緣(yuan)(yuan)且絕緣(yuan)(yuan)水平要高于系(xi)統額(e)定(ding)電壓(ya)；當電容(rong)額(e)定(ding)電壓(ya)與電網標(biao)稱電壓(ya)相同時(shi)則需將電容(rong)外殼(ke)接(jie)地(di)，若額(e)定(ding)電壓(ya)低于供電電網標(biao)準電壓(ya)則需加裝絕緣(yuan)(yuan)支(zhi)架(jia)。

4、電容器組可設單獨的保護裝置

如果想單獨提高某一用電設備的功率因數可以為相關電力電容器組設置單獨的控制及保護裝(zhuang)置。