電(dian)(dian)(dian)容器(qi)在(zai)無功(gong)補償回路中往往受到(dao)諧(xie)波(bo)電(dian)(dian)(dian)流(liu)、合閘涌流(liu)及過電(dian)(dian)(dian)壓(ya)的影響，造成電(dian)(dian)(dian)容器(qi)容易損(sun)壞，因(yin)此(ci)串聯一定比例的電(dian)(dian)(dian)抗器(qi)，用以(yi)抑制和(he)吸收部分諧(xie)波(bo)，可以(yi)顯(xian)著(zhu)提高供電(dian)(dian)(dian)系統(tong)的可靠(kao)性和(he)穩定性，在(zai)很(hen)多情況下，如(ru)電(dian)(dian)(dian)網諧(xie)波(bo)含(han)量大時，則(ze)必須串聯與電(dian)(dian)(dian)容配(pei)套的電(dian)(dian)(dian)抗器(qi)。

諧波嚴重場(chang)合濾(lv)波補償模組的主要作用

此(ci)外(wai)，由(you)于(yu)工藝需(xu)要，必須減少電(dian)(dian)(dian)壓(ya)(ya)(ya)偏差值的(de)，也需(xu)要按電(dian)(dian)(dian)壓(ya)(ya)(ya)參數調節無(wu)功(gong)功(gong)率。如供電(dian)(dian)(dian)變(bian)壓(ya)(ya)(ya)器已采用自動電(dian)(dian)(dian)壓(ya)(ya)(ya)調節，則(ze)不能再采用以(yi)電(dian)(dian)(dian)壓(ya)(ya)(ya)為主參數的(de)自動無(wu)功(gong)補償(chang)裝置，避免造(zao)成振蕩。當電(dian)(dian)(dian)容器裝在電(dian)(dian)(dian)動機(ji)控(kong)制設備(bei)的(de)負荷側時，流過(guo)(guo)過(guo)(guo)電(dian)(dian)(dian)流裝置的(de)電(dian)(dian)(dian)流小于(yu)電(dian)(dian)(dian)動機(ji)本身的(de)電(dian)(dian)(dian)流，電(dian)(dian)(dian)流減少的(de)百(bai)分數近似值可用下式計(ji)算：

諧(xie)(xie)波(bo)的次(ci)(ci)數(shu)(shu)(shu)一般較低(di)，以3次(ci)(ci)和5次(ci)(ci)為(wei)主，無功補償(chang)回路中(zhong)的電(dian)抗P值可采取(qu)7%的產品規格；如果調功器的晶閘管采取(qu)過(guo)零式觸發，則(ze)諧(xie)(xie)波(bo)量(liang)較少，但會出現分數(shu)(shu)(shu)次(ci)(ci)諧(xie)(xie)波(bo)。此(ci)時要(yao)用電(dian)力儀表(biao)來檢測諧(xie)(xie)波(bo)次(ci)(ci)數(shu)(shu)(shu)，并(bing)做(zuo)好(hao)諧(xie)(xie)波(bo)抑制工作。總(zong)之(zhi)，諧(xie)(xie)波(bo)治(zhi)理是企業的一個(ge)大難題，需要(yao)采取(qu)綜(zong)合措施才行。