Abstract The operating principle of the three-phase four-wire active power filter（APF）is introduced.　According to the application characteristics of APF in three-phase four-wire system and on the basis of the instantaneous reactive power theory and the theory of triangular wave comparison and control，methods of designating the times of harmonic compensation for APF current is deeply studied. The effectiveness and correctness of this method are verified by the result of simulation and experiment.

Key words　Active power filter Three-phase four-wire system Harmonic compensation Simulation and experiment

 

摘　要　介绍三相四线有源电力滤波器（APF）的工作原理，针对三相四线制系统中APF的应用特点，基于瞬时无功理论和三角波比较控制理论，对APF电流的指定次谐波补偿方法进行深入研究。仿真和实验结果均验证了这种方法的有效性和正确性。

关键词　有源电力滤波器 三相四线制 谐波补偿 仿真和实验