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提出一种单相输出可调压的新型直流侧串联型有源电力滤波器(active power filter,APF),对单相整流类负载进行功率因数校正和谐波治理有很大的技术优势。从理论上分析了改进型直流侧APF的电路拓扑和基本工作原理,给出了主电路的主要参数设计和选取标准,为系统的综合设计提供了理论依据。与传统的交流侧串联型APF相比,该APF串联在整流桥的直流侧,简化了电路结构,减少了有源开关的数量;与直流侧串联型APF相比,该改进型APF实现了输出电压的可调,简化了相应的控制和驱动电路,进一步减小了储能电容容量。仿真和实验结果证明了所提出拓扑的正确性和可靠性。
A new type of active power filter (APF) with adjustable output voltage and single-phase output is proposed. It has great technical advantages for power factor correction and harmonic control of single-phase rectified loads. The circuit topology and basic working principle of the improved DC-side APF are theoretically analyzed. The main parameters of the main circuit design and selection criteria are given, which provides a theoretical basis for the comprehensive design of the system. Compared with the traditional AC-side series APF, the APF is connected in series with the DC side of the rectifier bridge to simplify the circuit structure and reduce the number of active switches. Compared with the DC-side series APF, the improved APF realizes the output The voltage is adjustable, simplifying the corresponding control and drive circuit, further reducing the capacity of the storage capacitor. Simulation and experimental results show the correctness and reliability of the proposed topology.