TY - JOUR
T1 - A Novel Operation Scheme for Modular Multilevel Converter with Enhanced Ride-Through Capability of Submodule Faults
AU - Xiao, Qian
AU - Wang, Jinyu
AU - Jin, Yu
AU - Chen, Linglin
AU - Jia, Hongjie
AU - Dragicevic, Tomislav
AU - Teodorescu, Remus
N1 - Publisher Copyright:
© 2013 IEEE.
PY - 2021/4
Y1 - 2021/4
N2 - Submodule (SM) fault is a common potential problem in the modular multilevel converter (MMC), which may lead to current distortion and even the collapse of the control system. This article proposes a novel operation scheme for SM fault in medium-voltage MMC applications. First, when the fault number is low, the capacitor voltages increase to a lower value according to the operation status. Second, when the fault number is higher, the capacitor voltages increase to the rated value and the zero-sequence voltage (ZSV) is injected to maintain the normal operation of MMC. In addition, a virtual voltage idea is applied to simplify the modulation under SM faults, where the reconfigurations of carriers are not necessary. Compared with the conventional fault-tolerant method, the proposed method can enhance the ride-through capability of MMC and simplify the modulation process under SM faults. Simulation and experimental results verify the effectiveness of the proposed operation scheme under severe SM faults.
AB - Submodule (SM) fault is a common potential problem in the modular multilevel converter (MMC), which may lead to current distortion and even the collapse of the control system. This article proposes a novel operation scheme for SM fault in medium-voltage MMC applications. First, when the fault number is low, the capacitor voltages increase to a lower value according to the operation status. Second, when the fault number is higher, the capacitor voltages increase to the rated value and the zero-sequence voltage (ZSV) is injected to maintain the normal operation of MMC. In addition, a virtual voltage idea is applied to simplify the modulation under SM faults, where the reconfigurations of carriers are not necessary. Compared with the conventional fault-tolerant method, the proposed method can enhance the ride-through capability of MMC and simplify the modulation process under SM faults. Simulation and experimental results verify the effectiveness of the proposed operation scheme under severe SM faults.
KW - Fault-tolerant control
KW - modular multilevel converter (MMC)
KW - submodule (SM) fault
KW - virtual voltage
KW - zero-sequence voltage (ZSV)
UR - https://www.scopus.com/pages/publications/85091309648
U2 - 10.1109/JESTPE.2020.2967576
DO - 10.1109/JESTPE.2020.2967576
M3 - 文章
AN - SCOPUS:85091309648
SN - 2168-6777
VL - 9
SP - 1258
EP - 1268
JO - IEEE Journal of Emerging and Selected Topics in Power Electronics
JF - IEEE Journal of Emerging and Selected Topics in Power Electronics
IS - 2
M1 - 8962196
ER -