C型滤波器在混合型有源滤波器中应用及优化  

Application and optimization of C-type filter in hybrid active power filter

作　　者：陶骞[1] 刘开培[2] 

机构地区：[1]湖北省电力试验研究院,湖北武汉430077 [2]武汉大学电气工程学院,湖北武汉430072

出　　处：《电力自动化设备》2009年第2期39-43,共5页Electric Power Automation Equipment

摘　　要：为了在减小有源电力滤波器设计容量、降低成本的同时确保其谐波补偿性能,将C型无源滤波器代替通常的单调谐无源环节与有源滤波器串联,利用其在基波频率时表现出高阻抗,而在谐波频率时表现为低阻抗来承栽大部分基波电压,从而可有效地减小有源滤波器的设计容量。通过分析C型滤波器的阻抗频率特性方程,给出了C型滤波器的参数算法及优化过程。仿真及试验结果表明C型滤波器在低于截止频率时表现为电容特性,而在高频段表现出纯电阻特性,90%的电压由C型滤波器承担,系统的总谐波含量THD低于5%,5次和7次谐波基本消除。C-type passive filter, instead of the mono-tuning section, is connected in series with active filter to diminish the design capacity of APF（Active Power Filter） and reduce the cost, while the harmonic compensation performance is ensured. As C-type passive filter presents high impedance on fundamental frequency and low impedance on harmonic frequency, the design capacity of APF is effectively reduced because most fundamental voltage is taken over by it. Based on the analysis of its impedance frequency characteristic equation, its parameter optimization is proposed. Simulative and experimental results indicate that： C-type filter shows capacitive characteristics below cutoff frequency and resistant characteristics at high frequency band; 90 % voltage is dropped on it; system THD is under 5 %; the 5th and 7th harmonics are nearly eliminated.

关 键 词：混合有源滤波器 C型滤波器 基波频率 谐波频率 阻抗频率特性 优化 

分 类 号：TN713[电子电信—电路与系统]