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IJEETC 2023 Vol.12(5): 326-333
doi: 10.18178/ijeetc.12.5.326-333

Experimental Verification and Simulation Analysis of a Battery Directly Connected DC-Microgrid System

Ke Liu1,*, Hirohito Yamada1,2, Katsumi Iwatsuki2, and Taiichi Otsuji2
1. Graduate School of Engineering, Tohoku University, Sendai, Japan
2. International Research Institute of Disaster Science, Tohoku University, Sendai, Japan

Manuscript received March 7, 2023; revised May 18, 2023; accepted June 16, 2023.

Abstract—The transformation towards renewable and sustainable energy, as well as the digitalization of energy, has promoted the development of the power system towards miniaturization, decentralization, and intelligence. As a solution, a battery-directly-connected DC microgrid has been proposed in previous studies for autonomous and decentralized coordination control (ADCC). We constructed a testbed of the battery directly connected DC-microgrid in our university campus which has been operating stably for more than one year. This study experimentally verifies the feasibility of the battery-directly-connected DC microgrid, and the process of autonomous, decentralized, and coordinated energy distribution between the distributed small batteries through power loading experiments. In addition, a simulator for analyzing the behavior of the DC microgrid test platform is built in MATLAB/Simulink, and its accuracy is verified based on an energy flow analysis, revealing its potential for cyber-physical-system (CPS) construction.

Index Terms—DC microgrid, off-grid, battery-directly-connected, autonomous-decentralized-cooperative-control

Cite: Ke Liu, Hirohito Yamada, Katsumi Iwatsuki, and Taiichi Otsuji, "Experimental Verification and Simulation Analysis of a Battery Directly Connected DC-Microgrid System," International Journal of Electrical and Electronic Engineering & Telecommunications, Vol. 12, No. 5, pp. 326-333, September 2023. doi: 10.18178/ijeetc.12.5.326-333

Copyright © 2023 by the authors. This is an open access article distributed under the Creative Commons Attribution License (CC BY-NC-ND 4.0), which permits use, distribution and reproduction in any medium, provided that the article is properly cited, the use is non-commercial and no modifications or adaptations are made.