一、串聯電抗器和并聯電抗器的區別在哪里

串(chuan)(chuan)聯(lian)電(dian)抗器(qi)(qi)與并聯(lian)電(dian)抗器(qi)(qi)有明顯區(qu)別，體現(xian)在作用和(he)適(shi)用范(fan)圍上，串(chuan)(chuan)聯(lian)電(dian)抗器(qi)(qi)主要(yao)起限流(liu)和(he)濾波作用，并聯(lian)電(dian)抗器(qi)(qi)主要(yao)起無(wu)功(gong)補償作用，下面(mian)做詳細(xi)介紹：

1、串(chuan)聯電(dian)(dian)抗器(qi)(qi)(qi)是電(dian)(dian)力系統(tong)無功(gong)補償裝(zhuang)置(zhi)的(de)重要配套設備。電(dian)(dian)力電(dian)(dian)容(rong)器(qi)(qi)(qi)與(yu)串(chuan)聯電(dian)(dian)抗器(qi)(qi)(qi)串(chuan)聯后，能有效地抑制電(dian)(dian)網中的(de)高次諧(xie)波，限制合(he)閘(zha)涌流及(ji)操作過電(dian)(dian)壓，改善系統(tong)的(de)電(dian)(dian)壓波形，提高電(dian)(dian)網功(gong)率因數，對(dui)電(dian)(dian)力電(dian)(dian)容(rong)器(qi)(qi)(qi)及(ji)其它(ta)電(dian)(dian)力設備的(de)安全運行(xing)起(qi)到了較大的(de)作用(yong)。

串聯電抗器主要用于限制(zhi)短路(lu)電(dian)流，而電(dian)容器組串聯電(dian)抗(kang)器可以(yi)限制(zhi)高(gao)次(ci)諧波，降低電(dian)抗(kang)。

該圖片由注冊用戶"淺嘗不止—"提供，版權聲明反饋

2、并聯(lian)電(dian)抗器(qi)可以用于補償長距離輸電(dian)線(xian)路的(de)分(fen)布(bu)電(dian)容補償，防止(zhi)空(kong)載長線(xian)路末端電(dian)壓升高（通(tong)常用于500KV系統(tong)），還可以有利于單相重合(he)閘和降低(di)操(cao)作過電(dian)壓。

為了提高(gao)遠距(ju)離輸(shu)電(dian)線(xian)路(lu)的(de)(de)傳輸(shu)能(neng)力和改善(shan)線(xian)路(lu)的(de)(de)運行情況，削弱空載或輕(qing)載時長線(xian)路(lu)的(de)(de)電(dian)容效(xiao)應所引起的(de)(de)工頻電(dian)壓(ya)升高(gao)，改善(shan)沿(yan)線(xian)電(dian)壓(ya)分布和輕(qing)載線(xian)路(lu)中的(de)(de)無功分布并(bing)降低線(xian)損，減(jian)少(shao)潛(qian)供(gong)電(dian)流(liu)，加速潛(qian)供(gong)電(dian)弧的(de)(de)熄滅，提高(gao)線(xian)路(lu)自動重合閘的(de)(de)成功率(lv)，并(bing)聯電(dian)抗(kang)器被廣泛應用(yong)于電(dian)網的(de)(de)遠距(ju)離輸(shu)配電(dian)項目。

二、串聯電抗器的電流大嗎

確定電(dian)容(rong)器(qi)(qi)串(chuan)聯電(dian)抗器(qi)(qi)回(hui)路的(de)電(dian)流，應該(gai)把(ba)電(dian)容(rong)器(qi)(qi)和(he)串(chuan)聯電(dian)抗器(qi)(qi)作為一(yi)個回(hui)路整體來分(fen)析，因(yin)為補償(chang)回(hui)路中除了要承(cheng)載正常的(de)基波無功電(dian)流外，還應該(gai)允許它能夠(gou)承(cheng)載一(yi)定量(liang)的(de)某次(ci)諧波電(dian)流。

串聯電抗器的電(dian)容(rong)器補(bu)償回路，常情況下補(bu)償容(rong)量及(ji)通過的電(dian)流如何計算呢，現舉例如下：如果回路電(dian)抗(kang)器的電(dian)抗(kang)率為14%，系統電(dian)壓為400V。

電(dian)(dian)(dian)容器(qi)(qi)承受的電(dian)(dian)(dian)壓(ya)為(wei)：400(1-14%)=465.1V，如果選擇所配套的電(dian)(dian)(dian)容器(qi)(qi)額定電(dian)(dian)(dian)壓(ya)為(wei)525V（也可以為(wei)480V），額定電(dian)(dian)(dian)壓(ya)525V，容量為(wei)30Kvar的電(dian)(dian)(dian)容器(qi)(qi)額定電(dian)(dian)(dian)流為(wei)33A，串聯電(dian)(dian)(dian)抗率(lv)14%的后實際發(fa)出30x（465.1/525）2-23.5Kvar，向電(dian)(dian)(dian)網(wang)只能補償23.5x（1-14%）=20.1Kvar的無功(gong)(gong)功(gong)(gong)率(lv)，此(ci)(ci)時通過(guo)電(dian)(dian)(dian)容器(qi)(qi)的電(dian)(dian)(dian)流23.5/（V3x0.4651）=29.2（A）。此(ci)(ci)時通過(guo)的電(dian)(dian)(dian)流遠小于(yu)額定電(dian)(dian)(dian)流33A了。

所以串聯電(dian)抗器的電(dian)流是不大的。