Autonomous Control Strategy of DC Microgrid for Islanding Mode Using Power Line Communication

Dong-Keun Jeong, Ho-Sung Kim, Ju-Won Baek, Hee-Je Kim and Jee-Hoon Jung
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Dong-Keun Jeong: Department of Electrical Engineering, Pusan National University, Pusan 46241, Korea
Ho-Sung Kim: Power Conversion and Control Research Center, HVDC Research Division, KERI, Changwon 51543, Korea
Ju-Won Baek: Power Conversion and Control Research Center, HVDC Research Division, KERI, Changwon 51543, Korea
Hee-Je Kim: Department of Electrical Engineering, Pusan National University, Pusan 46241, Korea
Jee-Hoon Jung: School of Electrical & Computer Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea

Energies, 2018, vol. 11, issue 4, 1-22

Abstract: This paper proposes a DC-bus signaling (DBS) method for autonomous power management in a DC microgrid, used to improve its reliability. Centralized power management systems require communication between the power sources and loads. However, the DBS method operates based on the common DC-bus voltage and does not require communication. Based on the DC-bus voltage band, the DC-bus voltage can be used to inform the status of the DC-bus in various scenarios. The DC microgrid operates independently to maintain the system stably in the DC-bus voltage band. The DC microgrid can be divided into a grid-connected mode and an islanding mode. This paper proposes a control strategy based on power management of various independent components in islanding mode. In addition, the autonomous control method for switching the converter’s operation between grid-connected mode and islanding mode is proposed. A DC microgrid test bed consisting of a grid-connected AC/DC converter, a bidirectional DC/DC converter, a renewable energy simulator, DC home appliances and a DC-bus protector is used to test the proposed control strategy. The proposed autonomous control strategy is experimentally verified using the DC microgrid test bed.

Keywords: DC microgrid; DC-bus signaling (DBS); autonomous control strategy; power management algorithm; power line communication; recovery control strategy; moving average (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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