Sepic derived hybrid converter with simultaneous AC and DC outputs

Abstract

A novel hybrid converter architecture called Sepic Derived Hybrid Converter(SDHC) which can provide ac output and step up or step down dc output simultaneously from a single dc input in a single-stage conversion is proposed. This architecture is derived from SEPIC(Single Ended Primary Inductor Converter) topology by replacing the control switch with a single phase inverter bridge network. Unlike traditional buck type voltage source inverters, the proposed topology has inherent shoot-through protection capability. Both the step-up/step-down dc and the single-phase ac outputs can be independently regulated. This topology have applications in nanogrid architecture in modern smart residential electric power system, electric vehicles, hybrid fuel cell, aircraft power distribution system etc. In this paper, principle of operation of SDHC is explained in detail and expression for its dc and ac conversion ratio derived. The validity and effectiveness of proposed converter and its control performance are verified by MATLAB Simulink and experimental results.