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Energies 2016, 9(6), 469; doi:10.3390/en9060469

Coordination Control Strategy for AC/DC Hybrid Microgrids in Stand-Alone Mode

Department of Electrical and Information Engineering, Seoul National University of Science and Technology, Seoul 01811, Korea
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Author to whom correspondence should be addressed.
Academic Editor: Jang-Ho Lee
Received: 31 December 2015 / Revised: 26 May 2016 / Accepted: 7 June 2016 / Published: 18 June 2016
(This article belongs to the Special Issue Selected Papers from 5th Asia-Pacific Forum on Renewable Energy)

Abstract

Interest in DC microgrids is rapidly increasing along with the improvement of DC power technology because of its advantages. To support the integration process of DC microgrids with the existing AC utility grids, the form of hybrid AC/DC microgrids is considered for higher power conversion efficiency, lower component cost and better power quality. In the system, AC and DC portions are connected through interlink bidirectional AC/DC converters (IC) with a proper control system and power management. In the stand-alone operation mode of AC/DC hybrid microgrids, the control of power injection through the IC is crucial in order to maintain the system security. This paper mainly deals with a coordination control strategy of IC and a battery energy storage system (BESS) converter under stand-alone operation. A coordinated control strategy for the IC, which considers the state of charge (SOC) level of BESS and the load shedding scheme as the last resort, is proposed to obtain better power sharing between AC and DC subgrids. The scheme will be tested with a hybrid AC/DC microgrid, using the tool of the PSCAD/EMTDC software. View Full-Text
Keywords: battery energy storage system; droop control; hybrid AC/DC microgrid; interlink bidirectional AC/DC converter; power management battery energy storage system; droop control; hybrid AC/DC microgrid; interlink bidirectional AC/DC converter; power management
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Aryani, D.R.; Song, H. Coordination Control Strategy for AC/DC Hybrid Microgrids in Stand-Alone Mode. Energies 2016, 9, 469.

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