Structural and Performance Comparison Between Harmonic Selective Repetitive Controllers for Shunt Active Power Filter

The repetitive controller (RC) represents a very effective solution for the current control of shunt active power filters. Using this structure as basis, several authors have proposed harmonic selective schemes that are more advantageous than the conventional RC when the control system references only contain a well-known family of harmonic components, such as 6k ± 1 or 4k ± 1 (all odd). In this sense, this paper presents a structural and performance comparison between real and complex harmonic selective RC-based solutions. Experimental results were used to validated the comparative study.