中文摘要：

针对直流侧串联型有源电力滤波器（active power filter,APF）输出不可调压和控制电路较复杂的特性,提出一种输出可调压的改进型直流侧串联型APF拓扑。从理论上分析了改进型直流侧串联型APF电路拓扑和基本工作原理,根据电路功率因数预调节原理,给出了主电路参数设计方法。利用零极点配置法对电压环和电流环进行了设计。同时主电路功率开关采用同频率控制,进一步简化控制电路。与并联型APF相比,该拓扑简化了主电路结构,进一步减少有源开关的数量,具有输入电流谐波低、功率因数高、输出电压调节范围宽、成本低等优点。仿真结果证明了所提出拓扑的正确性和可靠性。

英文摘要：

Considering the characteristics of the dc side series active power filter （APF） that the output voltage cannot be adjusted and the control circuit is complex , an improved single-phase dc series APF topology is proposed. The improvement of the new circuit topology and fundamental working principle are power factor, large voltage output adjustment range and low cost. The simulation results prove that the proposed topology is correct and reliable.