采用检测电源电流控制方式的串联型电力有源滤波器

分析了与并联型电力有源滤波器原理完全不同的、适用于补偿电压型谐波源的串联型电力有源滤波器的工作原理，阐明了其基于瞬时无功功率理论的检测电源电流控制方式，并据此提出了直流电压和ＰＷＭ 逆变器的控制方法．在此基础上研制了实验样机．实验结果验证了所提出的控制方法是有效的，并且表明串联型电力有源滤波器对电压型谐波源具有良好的谐波补偿能力．

Series Active Power Filter Based on Control Method for Detecting Source Current

Basic operation principle of the series active power filter is analyzed for the line current harmonics compensation of voltage harmonic source. This is different from the shunt active power filter, which is usually for the line current harmonic compensation of current harmonic source. A control approach of source current detection is introduced,which is based on the instantaneous reactive power theory. The DC side voltage control method and pulse width modulation method ane also proposed. Finally, a prototype series active power filter is established. The experimental results verify the effectiveness of the proposed control method and indicate that the series active power filter has good compensation characteristics for harmonics to voltage harmonic source.