High-Performance Resonant Controller for Active Power Filter with Selective Harmonic Compensation

This paper proposes a high-performance resonant current controller for shunt active power filter (APF). The method employs an array of resonant current controllers implemented in fundamental reference frame to selective harmonic compensation (SHC). The controller based on the pole-zero cancellation technique, taking into account the control object transfer function at each harmonic frequency. To cope with the grid frequency variations, the controller utilizes the frequency information provided by Phase-Locked Loop (PLL). Furthermore, the relationship between the current controller parameters and harmonic compensation performance analyzed in detail. The validity of the proposed controller is confirmed by experimental results.