Scalable architecture of DC microgrid implemented with multi‐input multi‐output converter

Abstract

In this study, modelling, implementation, and control of a hybrid renewables-based, scalable DC microgrid using multi-input multi-output dual active half-bridge (DAHB) converter is presented. The proposed microgrid architecture exhibits superiority and enhanced functionality in comparison to the existing conventional architectures in terms of the reduced number of converters for each resource integration, modularity, scalability, and bidirectional power flow capability, and local maximum power point tracking for each renewable resource. The proposed architecture is significant in terms that only a single converter is responsible for the whole operation of the DC microgrid. A dual half active bridge acts as a central hub for power processing while multiple renewable energy resources can be integrated through isolated input and output ports. The proposed microgrid is analysed for power flow, and the control scheme for different voltage and power-sharing scenarios is designed. The proposed architecture of the microgrid is simulated on the Power-SIM simulator, and a simplified hardware prototype is implemented in the laboratory with satisfactory results.