RT Journal Article
T1 Effect of Capacitor Voltage Ripples on Submodule Active Power Control Limits of Cascaded Multilevel Converters
A1 Liang, Gaowen
A1 Tafti, Hossein Dehghani
A1 Farivar, Glen G.
A1 Pou, Josep
A1 Townsend, Christopher D.
A1 Konstantinou, Georgios
A1 Ceballos, Salvador
AB In the operation of cascaded H-bridge converters and modular multilevel converters with energy storage or renewable power resources, unbalanced active power distribution among the submodules (SMs) is unavoidable. Depending on the operating conditions, there are certain upper and lower limits on the active power that can be processed by a single SM or a subset of SMs. The control system needs to restrict the SM power references to these limits, hence, accurate knowledge of the power limits is important. In existing methods to derive the power limits, the SM capacitor voltages are assumed to have negligible ripples, whereas in practice the ripples can be considerable. This article analyzes the effect of capacitor voltage ripples on the SM active power control limits and highlights the importance of considering the ripple effect. A methodology is proposed to accurately incorporate capacitor voltage ripples in the derivation of SM active power control limits. Simulation and experimental results are provided to evaluate the effectiveness of the proposed methodology.
SN 0278-0046
YR 2022
FD 2022-06-01
LK https://hdl.handle.net/11556/3492
UL https://hdl.handle.net/11556/3492
LA eng
NO Liang , G , Tafti , H D , Farivar , G G , Pou , J , Townsend , C D , Konstantinou , G & Ceballos , S 2022 , ' Effect of Capacitor Voltage Ripples on Submodule Active Power Control Limits of Cascaded Multilevel Converters ' , IEEE Transactions on Industrial Electronics , vol. 69 , no. 6 , pp. 5952-5961 . https://doi.org/10.1109/TIE.2021.3091934
NO Publisher Copyright: © 2021 IEEE.
DS TECNALIA Publications
RD 28 jul 2024