A parallel hybrid active power filter for resonance damping in industrial networks

This paper presents a hybrid power filter as a combination of small-rating active filter connected in parallel with an inductor of a shunt, passive LC compensator. The main objective of the passive part is to compensate reactive power, while the active part is used to improve filtering performance and damp the resonance amplifications of current harmonics. As a result, no harmonic resonance occurs under any system condition. The effectiveness of the hybrid compensator is demonstrated on a realistic industrial-network model by means of simulations.