Experimental validation of a basic module based on a single-stage AC-DC converter, feasible to solid-state transformer applications

Abstract

This paper shows the experimental validation of a basic module from a single-stage ac-dc bidirectional power converter, which is feasible for solid-state transformer applications. The proposed converter is based on the dual active bridge (DAB) using an interleave technique. The converter can be modularized and applied at high voltage in a three phase system operating as rectifier or inverter. The topology is briefly presented and experimental results from a small-scale prototype are discussed to validate its operation principles and control strategy. The results show that the control strategy is able to operate the converter properly maintaining all DC bus on reference value. The converter is also capable of operate with a high power factor and a low harmonic distortion. Simulation results are shown from a prototype that is under construction with a higher power and magnetic integration.