DC Fault Current Analyzing, Limiting, and Clearing in DC Microgrid Clusters

Navid Bayati, Hamid Reza Baghaee, Mehdi Savaghebi, Amin Hajizadeh, Mohsen N. Soltani and Zhengyu Lin
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Navid Bayati: Electrical Engineering Section, Department of Mechanical and Electrical Engineering, University of Southern Denmark, 5230 Odense, Denmark
Hamid Reza Baghaee: Department of Electrical Engineering, Amirkabir University of Technology, Tehran 15875-4413, Iran
Mehdi Savaghebi: Electrical Engineering Section, Department of Mechanical and Electrical Engineering, University of Southern Denmark, 5230 Odense, Denmark
Amin Hajizadeh: Department of Energy Technology, Aalborg University, 6700 Esbjerg, Denmark
Mohsen N. Soltani: Department of Energy Technology, Aalborg University, 6700 Esbjerg, Denmark
Zhengyu Lin: Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, Loughborough LE11 3TU, UK

Energies, 2021, vol. 14, issue 19, 1-19

Abstract: A new DC fault current limiter (FCL)-based circuit breaker (CB) for DC microgrid (MG) clusters is proposed in this paper. The analytical expressions of the DC fault current of a bidirectional interlink DC/DC converter in the interconnection line of two nearby DC MGs are analyzed in detail. Meanwhile, a DC fault clearing solution (based on using a DC FCL in series with a DC circuit breaker) is proposed. This structure offers low complexity, cost, and power losses. To assess the performance of the proposed method, time-domain simulation studies are carried out on a test DC MG cluster in a MATLAB/Simulink environment. The results of the proposed analytical expressions are compared with simulation results. The obtained results verify the analytical expression of the fault current and prove the effectiveness of the proposed DC fault current limiting and clearing strategy.

Keywords: DC microgrid; fault; cluster; DC/DC converter; fault current limiter (FCL) (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 (4)

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