TY - GEN
T1 - A Study on the Analysis of Fault Current in Bipolar MVDC System Using Modular Multilevel Converter
AU - Shin, Gwang Su
AU - Song, Jin Sol
AU - Kim, Ho Young
AU - Kim, Chul Hwan
N1 - Publisher Copyright:
© 2025 IEEE.
PY - 2025
Y1 - 2025
N2 - As power systems evolve with the integration of renewable energy sources and the rise in DC loads, there is growing interest in hybrid AC/DC power transmission systems. Historically, AC transmission has dominated due to its efficiency in long-distance power delivery and ease of transformation. However, advances in power conversion technology and the increasing prevalence of DC-based loads, such as electric vehicles, have led to a shift towards integrating DC systems into the grid. While this integration offers benefits like excellent system responsiveness, DC systems also present challenges, particularly in transient fault analysis due to power converters' complex, discontinuous dynamics. This paper focuses on a bipolar mediumvoltage DC (MVDC) system modeled using Full-Bridge Modular Multilevel Converters (FB-MMC) in MATLAB/Simulink. By comparing the fault current characteristics of the bipolar MVDC system with an RLC equivalent impedance model of the converter, the study identifies key factors affecting fault current behavior. It validates the accuracy of the proposed model. The findings contribute to developing technologies necessary for stable and efficient MVDC system operation.
AB - As power systems evolve with the integration of renewable energy sources and the rise in DC loads, there is growing interest in hybrid AC/DC power transmission systems. Historically, AC transmission has dominated due to its efficiency in long-distance power delivery and ease of transformation. However, advances in power conversion technology and the increasing prevalence of DC-based loads, such as electric vehicles, have led to a shift towards integrating DC systems into the grid. While this integration offers benefits like excellent system responsiveness, DC systems also present challenges, particularly in transient fault analysis due to power converters' complex, discontinuous dynamics. This paper focuses on a bipolar mediumvoltage DC (MVDC) system modeled using Full-Bridge Modular Multilevel Converters (FB-MMC) in MATLAB/Simulink. By comparing the fault current characteristics of the bipolar MVDC system with an RLC equivalent impedance model of the converter, the study identifies key factors affecting fault current behavior. It validates the accuracy of the proposed model. The findings contribute to developing technologies necessary for stable and efficient MVDC system operation.
KW - Bipolar MVDC System
KW - Fault Current Calculation
KW - Full-Bridge Submodule
KW - Modular Multilevel Converter
UR - https://www.scopus.com/pages/publications/105010651129
U2 - 10.1109/ACPEE64358.2025.11041295
DO - 10.1109/ACPEE64358.2025.11041295
M3 - Conference contribution
AN - SCOPUS:105010651129
T3 - Proceedings - 2025 10th Asia Conference on Power and Electrical Engineering, ACPEE 2025
SP - 1067
EP - 1071
BT - Proceedings - 2025 10th Asia Conference on Power and Electrical Engineering, ACPEE 2025
A2 - Lie, Tek-Tjing
A2 - Shen, Chen
A2 - Li, Guojie
A2 - Liu, Youbo
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 10th Asia Conference on Power and Electrical Engineering, ACPEE 2025
Y2 - 15 April 2025 through 19 April 2025
ER -
