說明：濾(lv)(lv)波(bo)(bo)電(dian)(dian)抗器(qi)與(yu)濾(lv)(lv)波(bo)(bo)電(dian)(dian)容器(qi)串聯組成諧(xie)(xie)振(zhen)濾(lv)(lv)波(bo)(bo)器(qi)，一般用于(yu)(yu)3次至17次的(de)諧(xie)(xie)振(zhen)濾(lv)(lv)波(bo)(bo)或更(geng)高次的(de)高通濾(lv)(lv)波(bo)(bo)。直流輸電(dian)(dian)線路的(de)換流站、相控(kong)型(xing)靜止補償(chang)裝(zhuang)(zhuang)置、中大型(xing)整流裝(zhuang)(zhuang)置、電(dian)(dian)氣化(hua)鐵道，以至于(yu)(yu)所(suo)有大功率晶閘管控(kong)制(zhi)的(de)電(dian)(dian)力電(dian)(dian)子電(dian)(dian)路都(dou)是諧(xie)(xie)波(bo)(bo)電(dian)(dian)流源，必須加以濾(lv)(lv)除，不讓其進入系統。

  電(dian)(dian)(dian)力(li)部(bu)門(men)對于電(dian)(dian)(dian)力(li)系(xi)統(tong)中的諧波有具體規定(ding)。近年來(lai)電(dian)(dian)(dian)網受(shou)諧波電(dian)(dian)(dian)流源的威脅愈來(lai)愈嚴重，因此濾波是不可少的。