高通和低通濾波器對(duì)諧波檢測(cè)電路檢測(cè)-展示頁(yè)
2025-07-16 16:18本頁(yè)面
【正文】 APF在工作時(shí)首先必須通過(guò)某種諧波檢測(cè)方法來(lái)獲取諧波補(bǔ)償?shù)闹噶钚盘?hào)，然后由這個(gè)指令信號(hào)去控制PWM主電路，從而輸出所需要的諧波補(bǔ)償信號(hào)來(lái)抵消電網(wǎng)中諧波負(fù)載所產(chǎn)生的諧波，達(dá)到諧波(和無(wú)功功率)補(bǔ)償?shù)哪康?。an Jiaotong University 710049 China) Abstract Two circuits using high pass and low pass filters are obtained by introducing a detecting approach of harmonic currents based on the instantaneous reactive power simulation circuits are built by MATLAB simulation software, simulation studies about the influence of the filters in the detecting circuit on their detecting effect are carried out and,at the same time,the performances of two circuits are results show that the dynamic response and the detecting precision can greatly be influenced by the cutoff frequencies,the order and the type of the filters,and that the circuit containing LPF is better than the one containing HPF in both design and detecting effect. Keywords:Active power filter Instantaneous reactive power theory Harmonic detection Filter1 引言 有源電力濾波器(APF——Active Power Filter)是近年來(lái)發(fā)展起來(lái)的一種抑制電網(wǎng)諧波的先進(jìn)手段［1］。諧波電流檢測(cè)電路采用低通濾波器，無(wú)論從設(shè)計(jì)上還是從檢測(cè)效果都有優(yōu)勢(shì)。高通和低通濾波器對(duì)諧波檢測(cè)電路檢測(cè)摘要 從基于瞬時(shí)無(wú)功功率理論的一種諧波電流檢測(cè)方法，推出了采用高通和低通濾波器的兩種諧波電流檢測(cè)電路。利用MATLAB仿真軟件建立了相應(yīng)的仿真電路，并就濾波器對(duì)諧波電流檢測(cè)電路檢測(cè)效果的影響進(jìn)行了仿真研究，同時(shí)對(duì)兩種電路的性能進(jìn)行了對(duì)比，結(jié)果表明，濾波器的截止頻率、階數(shù)和類型對(duì)檢測(cè)電路的動(dòng)態(tài)響應(yīng)過(guò)程、檢測(cè)精度都有很大影響?！ ￡P(guān)鍵詞：有源電力濾波器
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