Multi-Port Dual-Active-Bridge DC-DC Converter for DC Microgrid Application to Integrate Renewable Energy Sources

This article proposes a new five-port converter for DC microgrid applications. It integrates multiple energy sources—solar, wind, biomass, and battery storage—using a minimal number of components. The converter operates in maximum power point tracking (MPPT) mode to maximize power harvesting from solar PV and wind sources. When these sources do not generate the rated power, biomass can be turned on to supply the deficit power, increasing the system’s overall reliability. Although the converter employs a multi-winding transformer, power flow is effectively controlled using a single-phase shift angle between the bridges. The working principle of the converter is thoroughly analyzed and validated with simulation results presented in this paper.