有源电力滤波器的LCL滤波器分析与设计

Analysis and design of LCL filter for active power filter

LCL滤波器具有低频增益和高频衰减的优越性,但是参数难以确定。文章提出一种有源电力滤波器的LCL滤波器新型设计方法,并根据LCL滤波器的低频特性,求出LCL滤波器的总电感值。滤波电容使电感分为两个不对称的电感,利用电容吸收的无功功率设计出滤波电容值。以谐振频率作为参变量,借助MATLAB仿真软件并结合工程经验,对两个不对称电感值进行分配。系统的实验结果也证明所提出的设计方法是可行的。

frequency, design was LCL filter is characterized by better gain at low the parameters of which need careful designing. frequency and better attenuation at high A novel convenient method of LCL filter proposed. The total inductance was determined with regard to the difference between the low and high frequency bands. The total inductance was split into two unsymmetrical parts with filter capacitor insertion. Filter capacitor was obtained with reactive power constraints. The total induct- ance was then evenly distributed into the two parts by setting resonance frequency. The experimental results indicate that the method is feasible.