TY - GEN
T1 - Short-Circuit Fault Ride-Through of Flying-Capacitor Multilevel Converters through Rapid Fault Detection and Idle-mode Operation
AU - Pallo, Nathan
AU - Taul, Mads Graungaard
AU - Stillwell, Andrew
AU - Pilawa Podgurski, Robert Carl Nikolai
N1 - Funding Information:
VII. ACKNOWLEDGMENTS This work is funded in part or whole by the U.S. Department of Energy Solar Energy Technologies Office, under Award Number DE-EE0008138, and Vehicle Technologies Office, under Award Number DE-EE0008712. This work was also supported by the Reliable Power Electronics-Based Power System (REPEPS) project at the Department of Energy Technology, Aalborg University as a part of the Villum Investigator Program funded by the Villum Foundation. Finally, the authors would like to thank Amanda Jackson and Avinash Jois for their efforts in software and firmware used in this paper.
Publisher Copyright:
© 2020 IEEE.
PY - 2020/11/9
Y1 - 2020/11/9
N2 - Throughout the lifetime of a dc-ac converter, abnormal ac-side short-circuit conditions may occur as a result of external component failure, grid faults, or accumulation of moisture and dust. In such conditions, converter protection is needed. Compared to a two-level converter, which may be powered down if a fault is detected, the flying-capacitor multilevel converter cannot maintain voltage balance of the flying capacitors using such an approach. This paper therefore proposes methods for fault detection, and subsequent idle-mode fault ride-through, that protects the converter from device failures while supporting flying capacitor voltage balance. This method is experimentally verified under different operating conditions and various levels on a hardware prototype.
AB - Throughout the lifetime of a dc-ac converter, abnormal ac-side short-circuit conditions may occur as a result of external component failure, grid faults, or accumulation of moisture and dust. In such conditions, converter protection is needed. Compared to a two-level converter, which may be powered down if a fault is detected, the flying-capacitor multilevel converter cannot maintain voltage balance of the flying capacitors using such an approach. This paper therefore proposes methods for fault detection, and subsequent idle-mode fault ride-through, that protects the converter from device failures while supporting flying capacitor voltage balance. This method is experimentally verified under different operating conditions and various levels on a hardware prototype.
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U2 - 10.1109/COMPEL49091.2020.9265743
DO - 10.1109/COMPEL49091.2020.9265743
M3 - Conference contribution
AN - SCOPUS:85098554704
T3 - 2020 IEEE 21st Workshop on Control and Modeling for Power Electronics, COMPEL 2020
BT - 2020 IEEE 21st Workshop on Control and Modeling for Power Electronics, COMPEL 2020
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 21st IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2020
Y2 - 9 November 2020 through 12 November 2020
ER -