A Battery Energy Storage System for Single-Phase Residential Application with Paralleled GaN Devices

In this paper a battery energy storage system (BESS) for single-phase residential application is proposed. The idea is to apply Gallium Nitride (GaN) devices in order to achieve the advantage of very low switching power loss and relatively high efficiency. The GaN-based BESS includes a bidirectional half-bridge dc-dc converter and a full-bridge single-phase grid-connected inverter with paralleled GaN devices. The power stage design, GaN paralleling, and controller design are analyzed. Moreover, OrCAD Spice and MATLAB SIMULINK simulation results are discussed and validated.