描述
除傳統(tǒng)的LC調(diào)試濾波器目前還在應(yīng)用外,當(dāng)前抑制諧波的一個(gè)重要趨勢(shì)是采用有源電力濾波器,它串聯(lián)或是并聯(lián)于主電路中,實(shí)時(shí)從補(bǔ)償對(duì)象中檢測(cè)出諧波電流,由補(bǔ)償裝置產(chǎn)生一個(gè)與該諧波電流大小相等、方向相反的補(bǔ)償電流,從而使電網(wǎng)電流只含基波電流。這種濾波器能對(duì)頻率和幅值都變化的諧波進(jìn)行跟蹤補(bǔ)償,其特性不受系統(tǒng)的影響,無(wú)諧波放大的危險(xiǎn),因而倍受關(guān)注,在日本等國(guó)已獲得廣泛應(yīng)用。
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