A new topology for a modular active power filter

This paper presents a new topology of modular (multi-converter) active power filter (APF), with reduced switch number. First, the basic topologies constituted by only one inverter of the active power filter for harmonic compensation in a three-phase three-wire electrical network is presented. Then, the classical topology and the new topology of a modular active power filter which has as advantage a minimum number of switches, therefore reduced losses and overall cost of the system are discussed. After, the control strategy adopted for this topology is developed. Simulation results, compared with classical modular active filter, prove the validity of this topology as well as the used control strategy.