TY - JOUR
T1 - Active redundant submodule configuration in modular multilevel converters
AU - Konstantinou, Georgios
AU - Pou, Josep
AU - Ceballos, Salvador
AU - Agelidis, Vassilios G.
PY - 2013
Y1 - 2013
N2 - The modular multilevel converter (MMC) is based on the cascaded connection of identical submodules (SMs) enabling additional redundancies. This paper proposes the configuration of the MMC topology with redundant SMs and demonstrates the effects of active redundancies. The proposed configuration decreases the switching frequency per SM while reducing the SM capacitor voltage ripples. An analytical model for determining the SM capacitor voltage ripple and voltage dynamics is derived. The results from the analytical model are compared with the switching model for a 21-level MMC with five redundant (25 in total) SMs per arm. Experimental results based on a single-phase laboratory prototype with five SMs per arm and a single redundant cell further illustrate the operation and verify the derived mathematical model and simulation results.
AB - The modular multilevel converter (MMC) is based on the cascaded connection of identical submodules (SMs) enabling additional redundancies. This paper proposes the configuration of the MMC topology with redundant SMs and demonstrates the effects of active redundancies. The proposed configuration decreases the switching frequency per SM while reducing the SM capacitor voltage ripples. An analytical model for determining the SM capacitor voltage ripple and voltage dynamics is derived. The results from the analytical model are compared with the switching model for a 21-level MMC with five redundant (25 in total) SMs per arm. Experimental results based on a single-phase laboratory prototype with five SMs per arm and a single redundant cell further illustrate the operation and verify the derived mathematical model and simulation results.
KW - Active redundancy
KW - modular multilevel converter (MMC)
KW - redundant configuration
KW - redundant submodules
KW - voltage balancing
UR - http://www.scopus.com/inward/record.url?scp=84885646883&partnerID=8YFLogxK
U2 - 10.1109/TPWRD.2013.2264950
DO - 10.1109/TPWRD.2013.2264950
M3 - Article
AN - SCOPUS:84885646883
SN - 0885-8977
VL - 28
SP - 2333
EP - 2341
JO - IEEE Transactions on Power Delivery
JF - IEEE Transactions on Power Delivery
IS - 4
M1 - 6578591
ER -