| dc.description.abstract | Present-day energy systems widely employ the dual active bridge (DAB) converter,
which is a very adaptable DC-DC power conversion technology. Its capacity to provide
bidirectional power flow while maintaining galvanic separation between the input
and output circuits is its main characteristic. Owing to this feature, it is especially
well-suited for a variety of industries, including grid applications running at low to
medium voltages, battery systems, solid-state transformers, and renewable energy. It is
constructed using eight MOSFETs/IGBTs, one driver for each MOSFET, high frequency
galvanic isolation transformer, auxiliary inductor, two DC link capacitors, and two
semiconductor fuses. Using the MOSFETs, two full bridge circuits were designed, and
those two full bridge circuits are connected using the high frequency galvanic isolation
transformer. A driver is used for each individual MOSFET, which gives the respective
high frequency switching signals to the MOSFET and the switching signals which are
generated by the microcontroller are fed to the driver. According to the phase shift
ratios of switching signals that are given to the MOSFETS and Dead Time ratio, the
direction of the power flow is decided. When it comes to renewable energy, the DAB
converter is essential because it effectively connects intermittent energy sources like
wind and solar photovoltaic (PV) to the grid or storage systems. It guarantees excellent
energy transfer efficiency, permits smooth power conversion, and adjusts to changing
input circumstances. Similar to this, the DAB converter controls battery charging and
discharging in battery energy storage systems (BESS), enabling bidirectional energy
flow and preserving maximum efficiency. | en_US |
