TY - GEN
T1 - Voltage Sensor Reduction Method for Modular Multilevel Converters Based on a Simple Voltage Reconstruction Approach
AU - Tian, Wei
AU - Shen, Pengxin
AU - De Sousa, Gean Maia
AU - Kennel, Ralph
AU - Heldwein, Marcelo Lobo
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - Modular multilevel converter (MMC) has been a promising topology in high and medium-voltage applications over the past decades. Conventional control schemes for MMCs need a voltage measurement from each submodule (SM) to achieve energy balancing. Consequently, a significant amount of sensors are required for the control system, which increases the circuit complexity and the hardware cost. This paper presents a voltage sensor reduction method for medium-voltage MMCs based on a simple voltage reconstruction approach. In this approach, the capacitor voltage of each SM is reconstructed based on the measured arm voltage and the switching patterns. As a result, the proposed method reduces the number of required voltage sensors from one per SM to one per arm. The effectiveness of the method is verified with simulations in closed-loop during transients and steady-state operation.
AB - Modular multilevel converter (MMC) has been a promising topology in high and medium-voltage applications over the past decades. Conventional control schemes for MMCs need a voltage measurement from each submodule (SM) to achieve energy balancing. Consequently, a significant amount of sensors are required for the control system, which increases the circuit complexity and the hardware cost. This paper presents a voltage sensor reduction method for medium-voltage MMCs based on a simple voltage reconstruction approach. In this approach, the capacitor voltage of each SM is reconstructed based on the measured arm voltage and the switching patterns. As a result, the proposed method reduces the number of required voltage sensors from one per SM to one per arm. The effectiveness of the method is verified with simulations in closed-loop during transients and steady-state operation.
KW - Modular multilevel converter (MMC)
KW - phase-shifted modulation
KW - voltage reconstruction
KW - voltage sensor reduction
UR - https://www.scopus.com/pages/publications/85185797378
U2 - 10.1109/SPEC56436.2023.10408495
DO - 10.1109/SPEC56436.2023.10408495
M3 - Conference contribution
AN - SCOPUS:85185797378
T3 - COBEP 2023 - 17th Brazilian Power Electronics Conference and SPEC 2023 - 8th IEEE Southern Power Electronics Conference, Proceedings
BT - COBEP 2023 - 17th Brazilian Power Electronics Conference and SPEC 2023 - 8th IEEE Southern Power Electronics Conference, Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 8th Southern Power Electronics Conference and the 17th Brazilian Power Electronics Conference, SPEC / COBEP 2023
Y2 - 26 November 2023 through 29 November 2023
ER -