Voltage Stability Assessment of a Campus DC Microgrid Implemented in Korea as a Blockchain-Based Power Transaction Testbed

Hyeonseok Hwang, Soo Hyoung Lee (), Donghee Choi, Sangbong Choi and Backsub Sung
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Hyeonseok Hwang: Department of Electrical and Control Engineering, Mokpo National University, Mokpo 58554, Republic of Korea
Soo Hyoung Lee: Division of Electrical, Electronic and Control Engineering, Kongju National University, Cheonan-si 31080, Republic of Korea
Donghee Choi: Department of Electrical and Control Engineering, Cheongju University, Cheongju-si 28503, Republic of Korea
Sangbong Choi: Power Grid Research Division, Korea Electrotechnology Research Institute (KERI), Changwon 51543, Republic of Korea
Backsub Sung: Chum-Dan Industry-Academia Campus, Attached Institute of Chosun University, Gwangju 61012, Republic of Korea

Energies, 2023, vol. 16, issue 21, 1-20

Abstract: Recently, the generalization of P2P (peer-to-peer) technology with enhanced security due to blockchain technology and the expansion of renewable energy-based distributed energy resources have led to blockchain technology being applied in power transactions, thus giving the potential to become a new platform for DC microgrid operation. Meanwhile, the voltage of a DC microgrid represents the balance of energy supply and demand and also serves as a stability index. The balance is represented as a steady state; the stability is represented during and after events. This paper examines the stability of the DC microgrid built on a university campus in Korea and, in particular, the blockchain technology-based power transactions performed in the DC microgrid. The test is based on the pre-planned transaction schedule applied in the DC microgrid. The transaction schedule has used day-ahead and real-time bidding data. Although many technologies are included in the project, this paper focuses on the voltage stability of the DC microgrid. In addition, the DC protection is applied and evaluated. To consider general DC protection, the DC breaker was simplified with several IGBTs, diodes, capacitors, and arrestors and was designed to interrupt the fault current within five milliseconds. The stability was evaluated using a PSCAD/EMTDC TM .

Keywords: blockchain; DC microgrid; distributed energy resource; P2P transaction; voltage stability (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: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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