三相整流桥直流侧并联型有源电力滤波器

针对不可控三相二极管整流桥，提出了一种三相直流侧并联型有源电力滤波器拓扑结构及其控制策略，该滤波器由工作在工频的3个低频开关和两个串联的双向Boost电路构成。控制策略采用无需进行谐波电流检测和计算的单周控制方法，可抑制整流桥前端注入电网的谐波电流，使整个整流桥装置从电网吸收的电流接近正弦波，功率因数近似为1。与传统的交流侧有源电力滤波器相比，可以减少高频有源开关的数量，降低成本；与功率因数校正器相比，仅处理负载电流中的谐波分量，可减小谐波治理装置的额定容量。仿真和实验结果证明了所提方法的正确性。

Three-phase Rectifier DC Side Parallel Active Power Filter

A three-phase DC side parallel active power filter(APF) topology and its control strategy are proposed in order to eliminate the input current harmonics of the three-phase diode rectifier. The presented APF is composed of three line-frequency switches and two series connected bidirectional Boost converters. One-cycle control is adopted to control the DC side APF without sensing and calculating harmonic current components. Compared with traditional AC side active power filter, the amount of high frequency active switch is reduced to four, so the cost of this AC side APF is lowered. Compared with traditional three-phase PWM rectifier, the DC side active power filter just processes the harmonic currents, so its rating is relative low. Simulation and experimental results verify the correctness of the proposed topology and the corresponding control method.