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。

An improved series single-phase active power filter (APF) at DC side whose output voltage is adjustable is proposed, this kind of improved APF can perform power factor correction and harmonic elimination for single-phase rectifier load. The circuit topology and basic working principle of the proposed improved series APF are analyzed theoretically; the design of main parameters and their selection are given. The proposed improved APF is connected in series with rectifier bridge at its DC side, so the circuit structure is simplified and the number of active switches is reduced than those of traditional APF that is connected in series with rectifier bridge at its AC side; the controllability of output voltage is realized by the proposed improved series single-phase APF and its corresponding control and driving circuit is simplified than that of commonly used DC side series APF, and the capacity of energy storage capacitor is further reduced. Simulation and experiment results show that topology of this improved series APF is correct and reliable.

重庆市自然科学基金资助项目(2005BA6017)

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