Analysis of DC fault for dual active bridge DC/DC converter including prototype verification

M. I. Rahman, K.H. Ahmed, D. Jovcic

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)
52 Downloads (Pure)


This paper presents DC fault analysis for a dual active bridge DC/DC converter which comprises of two active bridges and an internal medium frequency transformer. This topology provides galvanic isolation, voltage step up/ down and bidirectional power transfer. The DC fault study assumes the DC terminal voltage of the converter is at zero . T he steady state fault current is limited to a low magnitude which is less than the rated value without any control ler action depending o n the design of the converter . The DC faults current magnitudes are analyzed with AC equivalent circuit where only the fundamental component of the AC voltages and inductor current are considered . P hase shift and AC voltage magnitude modulation control met hods are selected . A detailed dual active bridge DC/DC converter 3 MW, 4/40 kV based system is simulated using MATLAB/Simulink to validate the proposed analytical study. Further, hardware testing is conducted to confirm the DC fault studies with a 500 W 24 /100 V prototype.
Original languageEnglish
JournalIEEE Journal of Emerging and Selected Topics in Power Electronics
Early online date17 Jul 2018
Publication statusE-pub ahead of print - 17 Jul 2018


  • dual active bridge
  • DC terminal fault
  • high power application


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