Research on Hierarchical Coordinated Control Strategy of Energy Router for DC Microgrid

This paper focuses on the research of multi-port energy router for low voltage DC microgrid. Firstly, a multi-port energy router based on DC bus architecture is proposed. Then, design the control strategy of each port of the energy router. The AC side port adopts the J and D adaptive improved virtual synchronous generator control with the introduction of pre-synchronization control. Considering that the inconsistent state of charge (SOC) will lead to the overcharge and overdischarge of part of energy storage. An improved droop control based on the state of charge of energy storage is designed in the DC side port. Finally, considering the SOC, peak cutting and valley filling, load mutation, emergency access and other factors, the DC bus voltage hierarchical coordination control strategy of energy router is designed. And the Matlab/Simulink simulation platform for a variety of switching simulation experiments. The results show that the energy router can recover stability quickly in the face of various emergencies.