Multi-layer Voltage Control Strategy for DC Microgrid without Communication

Abstract

This paper presented a multi-layer voltage control strategy for a stand-alone DC Microgrid. The unbalanced power of the system is compensated by the hybrid energy storage. The bus actual voltage is used as a message to implement the coordination of various terminals. By dividing the bus voltage, different voltage layers correspond to different working modes of each terminal of the system. The novelty of the presented control strategy is that the energy management performance of the DC Microgrid is improved, which is independent of the communication link. The DC Microgrid model is established in MATLAB/Simulink environment, and the simulation result shows that the presented strategy is feasible under different setting scenarios.