A multi-pulse diode rectifier with a coupled three-phase reactor and additional small shunt active power filter

The article presents the principle of operation and results of laboratory and simulation tests of a multi- pulse power network converter systems with direct-current voltage output, mating with shunt active power filter (APF). The discussed systems allow for significant reduction of undesirable higher harmonics in the power network current, including the elimination of harmonics of an order of 23 and 25, especially in the local power network supply conditions. The multi-pulse nature of operation of the system is obtained using set of coupled three-phase power network reactors (CTR).