| Abstract |
Smart Transformer (ST) is a promising technology, which usually requires a high frequency high voltagedc-dc converter. This paper investigates the application of a Quad-Active-Bridges (QAB) converter usingmultilevel bridges as a solution for the dc-dc stage of Smart Transformer. The focus of this work is tocompare in terms of efficiency 2-level and 3-levels bridges in a QAB converter for ST applications. Theconsidered power cell topologies are: H-bridge, Neutral-Point-Clamped (NPC), Flying-Capacitor (FC)and T-type (TT). The NPC and FC show as main advantage reduced voltage over their semiconductors,which allow the utilization of IGBT and diodes with lower forward drop voltage. Meanwhile, the HBtopology shows as advantage reduced current through its device. Thus, a comparative study is performedin order to find out the most suitable topology for this application. Two scenarios are defined and thecomparison and final results are presented for both scenarios. |
