The harmonic detection theories of APF are analyzed. The p-q theory and the ip-iq theory are simulated and compared with each other by the simulation program of PSCAD/EMTDC.

• 对有源滤波器的谐波检测理论进行了分析、概括，并用PSCAD/EMTDC仿真软件对p-q理论和ip-iq理论进行仿真计算和对比。