Three Topologies and a Control Strategy for Harmonic Suppression in Single-Phase Systems Using a Shunt Active Power Filter

This paper presents a control scheme with three topologies for harmonic suppression and power factor correction in a single-phase system with a diode rectifier load. It is assumed that inductive or capacitive loads are connected to the dc side of the diode rectifier. Simulation results show that the designed active power filter is very effective in harmonic elimination and power factor correction of rectifiers with inductive or capacitive loads. Three topologies and operation principle of the proposed control method are discussed in details. It is shown that the one leg active power filter has the same performance of two legs active power filter but its cost is very low. Thus from economic aspect, the one leg active power filter is preferred. Finally, the three topologies and the proposed control method are simulated with psim software.