Performance Comparison of Single-Phase SAPF Using PQ Theory and SRF Theory

In this paper a highly non-linear load has been modelled to compare the performance of PQ-Theory and SRF-Theory based extraction techniques for Active Power Filter (APF) using Simulink. To compare the dynamic and the steady state performance of these extraction techniques, a highly inductive load is connected after a certain simulation time and the behavior of the APF to this change has been studied. The extraction techniques originally designed for three phase systems has been adapted for a single-phase system and the implementation of it has been explained. The topology of the inverter, system parameters and load parameters are kept the same throughout this study for fair performance comparison of the two extraction techniques. Also, the reactive power compensation offered by these extraction techniques and certain anomalies seen in the waveforms have also been studied.