TY - GEN
T1 - Comparison between Two-Level and Modular Multilevel Converters in High Voltage Direct Current Systems under Fault Conditions
AU - Barra, Mikaela T.M.
AU - Santos, Maxwel S.
AU - De Souza, Victor R.F.B.
AU - Costa, Flavio B.
AU - Barros, Luciano S.
AU - Liu, Yunting
N1 - Funding Information:
This work was supported by the Coordination for the Improvement of Higher Education Personnel (CAPES) and by the National Council for Scientic and Technological (CNPq), Brazil.
Publisher Copyright:
© 2021 IEEE.
PY - 2021
Y1 - 2021
N2 - The occurrence of faults in multi-terminal high voltage direct current (MTDC) systems is a critical situation for both control and protection systems. For instance, MTDC systems work under large overcurrents during DC faults due to the discharging of capacitors on the DC side and the feeding of AC fault current to the DC system via the converters' anti-parallel freewheeling diodes, challenging their operation, control, and protection. Therefore, the behavior analysis of MTDC systems based on modular multi-level converter (MMC) when submitted to a critical situation is essential to develop fast and accurate protection systems and control strategies. The main goal of this paper is to present a comparison between a six-level MMC (6L-MMC) and a two-level voltage source converter (2L-VSC) for MTDC systems under DC and AC faults to highlight the main challenges for the control and protection systems, such as DC fault blocking capability, integration of AC and DC systems during different operating conditions, fault propagation, and DC voltage control.
AB - The occurrence of faults in multi-terminal high voltage direct current (MTDC) systems is a critical situation for both control and protection systems. For instance, MTDC systems work under large overcurrents during DC faults due to the discharging of capacitors on the DC side and the feeding of AC fault current to the DC system via the converters' anti-parallel freewheeling diodes, challenging their operation, control, and protection. Therefore, the behavior analysis of MTDC systems based on modular multi-level converter (MMC) when submitted to a critical situation is essential to develop fast and accurate protection systems and control strategies. The main goal of this paper is to present a comparison between a six-level MMC (6L-MMC) and a two-level voltage source converter (2L-VSC) for MTDC systems under DC and AC faults to highlight the main challenges for the control and protection systems, such as DC fault blocking capability, integration of AC and DC systems during different operating conditions, fault propagation, and DC voltage control.
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U2 - 10.1109/WCNPS53648.2021.9626296
DO - 10.1109/WCNPS53648.2021.9626296
M3 - Conference contribution
AN - SCOPUS:85123504983
T3 - 2021 Workshop on Communication Networks and Power Systems, WCNPS 2021
BT - 2021 Workshop on Communication Networks and Power Systems, WCNPS 2021
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2021 Workshop on Communication Networks and Power Systems, WCNPS 2021
Y2 - 18 November 2021 through 19 November 2021
ER -