Power system is gradually developed into a power electronic based power system and exists various power quality problems, which promotes the development of active power filter (APF). APF has developed into a comprehensive power quality conditioner. From the perspective of circuit topology, this paper has a more comprehensive classification of existing APFs, which are divided into parallel type, series type, hybrid type and others. Then, based on the fundamental four types, each APF is reviewed from the perspectives of topology, operating principle, application scenarios, and advantages and disadvantages, which provides a reference for researchers. Finally, the problems of the current industrialized APF have been analyzed by simulation, and other existing problems also have been summarized simply, such as supra-harmonics, background harmonics, multi-function power quality Controller. Moreover, this paper also briefly summarizes the further development trend of APF.

电力系统逐渐发展为以电力电子为基础的电力系统，存在各种电能质量问题，推动了有源电力滤波器（APF）的发展。APF已发展成为综合电能质量调节器。从电路拓扑的角度，本文对现有的APF进行了较为全面的分类，分为并联型、串联型、混合型等。然后，基于四种基本类型，从拓扑结构、工作原理、应用场景、优缺点等角度对每一种APF进行综述，为研究人员提供参考。最后通过仿真分析了目前工业化APF存在的问题，并简单总结了其他存在的问题，如超谐波、背景谐波、多功能电能质量控制器。此外，本文还简要总结了APF的进一步发展趋势。