Theoretical and Experimental Investigation of Phase shift control strategies of Bi-directional Energy Harvesters Interface (BEHI) for Battery Energy Storage System (BESS)

Bi-directional power flow capability and galvanic isolation are considered as core requirements of a Bi-directional Energy Harvester Interface (BEHI) in which the isolated dc-dc converter is the prime element. The BEHI along with energy storage is gaining popularity in many applications such as solid state transformers, hybrid micro grids, distributed generation, electric vehicles, fuel cell and so on. This paper presents operational principles and simulation/implementation of an isolated BEHI using Double Active Bridge (DAB) configuration with different phase shift control strategies; Single Phase Shift (SPS), Extended phase shift(EPS), Double Phase Shift(DPS).