一种工作模式可选的新型混合有源滤波器

Novel hybrid active power filter with optional operating mode

提出了一种由无源滤波器(PF)、串联有源滤波器(SAF)和并联有源滤波器(PAF)组成的新型混合有源滤波器,通过三种滤波器投入开关可以进行工作模式的选择,使此新型有源滤波器能应用于各种工业场合。采用了一种能在电网电压不平衡或畸变时准确检测出基波正序有功电流和和负序电流的检测算法,使新型有源滤波器在系统不平衡时也能进行滤波和基波正序无功电流和负序电流补偿。基于Matlab/Simulink的仿真结果证明了所用检测方法的有效性,此种有源滤波器具有较好的滤波性能和动态不平衡电流补偿能力。

A novel hybrid active power filter which contains a passive filter, a series power filter and a parallel power filter was proposed. The proposed active power filter was applied to a variety of industrial applications through choosing the operating mode by turning on or turning off three filters＇ input switches. A new detection algorithm which can detect positive fundamental active currents and reactive currents under non-ideal mains voltage conditions was used. The compensate harmonics, positive fundamental active currents and reactive currents in the unbalanced system were proposed. Simulation results based on Matlab/Simulink show that the feasibility of the detection method, the excellent filtering characteristic and good dynamic imbalance current compensation performance of the active power filter were performed well.