A Dynamic Voltage Restorer based on vector-switching matrix converters

This paper introduces a novel Dynamic Voltage Restorer (DVR) based on a reduced-order matrix converter capable of compensating for balanced as well as unbalanced voltage sags. The DVR has the ability of independently and selectively generating positive as well as negative sequence voltages, and hence it can compensate for different kind of sags. Operating principles, equivalent circuits, and illustrative examples in terms of computer simulations are presented in order to validate the approach.