Distributed cooperative control of DC microgrid cluster with multiple voltage levels

• DOI: 10.1016/j.ijepes.2024.109996
• Publication Date: 2024-05-10T16:42:46Z
• Authors: Zheng Dong; Jiawang Qin; Tianqu Hao; Xuming Li; Chi K. Tse; Pengyu Lu
• Keywords: Microgrid

Multiple DC microgrids are interconnected to form a microgrid cluster, which can effectively improve the renewable energy consumption capacity and power supply reliability of cluster through sharing storage among participating microgrids. However, existing methods not able flexibly coordinate flows between connected by multiport converter. In this paper, distributed cooperative control method is proposed for with multiple voltage levels multi-port A multi-active-bridge (MAB) converter acts as bridge exchange microgrids, enabling under sparse communication network. The improved secondary overcomes drawbacks droop achieves deviation-free regulation accurate load/source converters within cluster. be used retrofit distribution grids permit access energy. addition, observer provides information other nodes in addition information, reducing estimation error caused uneven storages. Finally, hardware-in-the-loop (HiL) experiments three verify performance, flexible plug-and-play capability, high tolerance failure.