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Open AccessArticle

Master–Slave Based Hierarchical Control for a Small Power DC-Distributed Microgrid System with a Storage Device

Department of Electrical Engineering, Seoul National University 301-617, DaeHak-dong, GwanAk-gu, Seoul 151-742, Korea
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Author to whom correspondence should be addressed.
Academic Editor: Josep M. Guerrero
Energies 2016, 9(11), 880; https://doi.org/10.3390/en9110880
Received: 2 September 2016 / Revised: 8 October 2016 / Accepted: 25 October 2016 / Published: 27 October 2016
(This article belongs to the Special Issue Microgrids 2016)
In this paper, we analyze one of the main drawbacks of droop control-based DC microgrid systems, and propose a novel control method to overcome this problem. Typically, DC microgrid systems use droop control techniques to enable communication independency and expandability. However, as these advantages are based on bus quality and regulation abandonment, droop-based schemes have limitations in terms of high bus impedance and bus regulation. This paper proposes a novel master–slave based hierarchical control technique for a DC distribution system, in which a DC bus signaling method is used to overcome the communication dependency and the expandability limitations of conventional master–slave control methods. The concept and design considerations of the proposed control method are presented, and a 1 kW simulation under a Powersim (PSIM) environment and hardware prototype—built to verify the system—is described. View Full-Text
Keywords: master–slave control with battery; DC microgrid with ESS; bus quality; communication-less master–slave master–slave control with battery; DC microgrid with ESS; bus quality; communication-less master–slave
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Lee, S.-W.; Cho, B.-H. Master–Slave Based Hierarchical Control for a Small Power DC-Distributed Microgrid System with a Storage Device. Energies 2016, 9, 880.

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