Energy Management System of DC Microgrid in Grid-Connected and Stand-Alone Modes: Control, Operation and Experimental Validation

Hoon Lee, Jin-Wook Kang, Bong-Yeon Choi, Kyung-Min Kang, Mi-Na Kim, Chang-Gyun An, Junsin Yi and Chung-Yuen Won
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Hoon Lee: Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16419, Korea
Jin-Wook Kang: Hanwah Defense Inc., Seongnam 13488, Korea
Bong-Yeon Choi: Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16419, Korea
Kyung-Min Kang: Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16419, Korea
Mi-Na Kim: Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16419, Korea
Chang-Gyun An: Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16419, Korea
Junsin Yi: Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16419, Korea
Chung-Yuen Won: Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16419, Korea

Energies, 2021, vol. 14, issue 3, 1-26

Abstract: This paper proposes an energy management system (EMS) of direct current (DC) microgrid. In order to implement the proposed EMS, the control and operation method of EMS is presented in this work. While most of the studies have individually examined the grid-connected mode used in building and the stand-alone operation mode applicable to the island, the proposed EMS allows it to be used in both grid-connected mode and stand-alone mode with 10 modes. In order to determine each mode in EMS, not only the amount of generated power, load power, and the state of charge (SOC) of the battery, but also the rated power of the energy storage system (ESS) converter that performs charging and discharging operations is additionally considered. Thus, various uncertainties that may occur in the actual DC microgrid environment can be improved. A laboratory-scale DC microgrid is fabricated to conduct experimental validation of proposed EMS. Experiments of DC microgrid with proposed EMS were performed for each mode, and the experiment waveforms of each power conversion device are included in detail.

Keywords: energy management system; DC microgrid; grid-connected; stand-alone; distributed generation; centralized control (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: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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