TY - GEN
T1 - Comparison of phase-shifted and level-shifted PWM in the modular multilevel converter
AU - Darus, Rosheila
AU - Konstantinou, Georgios
AU - Pou, Josep
AU - Ceballos, Salvador
AU - Agelidis, Vassilios G.
PY - 2014
Y1 - 2014
N2 - This paper reports a comparison study of different carrier-based PWM techniques applied to the modular multilevel converter. Phase-disposition PWM (PD-PWM) and phase-shifted pulse-width modulation (PS-PWM) with non-interleaving and interleaving are considered in this study. In PS-PWM, two cases are evaluated. In the first case, the particular SMs that have to be activated/deactivated are defined by a voltage balancing algorithm, which is the same one implemented in PD-PWM. In addition, an algorithm to restrict the number of switching SMs is also implemented to reduce the switching frequency of the power devices. In the other case of PS-PWM, each sub-module (SM) has a carrier signal associated to it and capacitor voltage balance is achieved by individual control of its capacitor voltage. The circulating current is controlled to be a dc component in all the cases. Simulation and experimental results are presented to evaluate the quality of the line-to-line output voltages and SM capacitor voltage ripples for the different cases under study.
AB - This paper reports a comparison study of different carrier-based PWM techniques applied to the modular multilevel converter. Phase-disposition PWM (PD-PWM) and phase-shifted pulse-width modulation (PS-PWM) with non-interleaving and interleaving are considered in this study. In PS-PWM, two cases are evaluated. In the first case, the particular SMs that have to be activated/deactivated are defined by a voltage balancing algorithm, which is the same one implemented in PD-PWM. In addition, an algorithm to restrict the number of switching SMs is also implemented to reduce the switching frequency of the power devices. In the other case of PS-PWM, each sub-module (SM) has a carrier signal associated to it and capacitor voltage balance is achieved by individual control of its capacitor voltage. The circulating current is controlled to be a dc component in all the cases. Simulation and experimental results are presented to evaluate the quality of the line-to-line output voltages and SM capacitor voltage ripples for the different cases under study.
KW - Capacitor voltage balancing
KW - Circulating current control
KW - Modular multilevel converter
KW - Modulation technique
UR - https://www.scopus.com/pages/publications/84906692160
U2 - 10.1109/IPEC.2014.6870039
DO - 10.1109/IPEC.2014.6870039
M3 - Conference contribution
AN - SCOPUS:84906692160
SN - 9781479927050
T3 - 2014 International Power Electronics Conference, IPEC-Hiroshima - ECCE Asia 2014
SP - 3764
EP - 3770
BT - 2014 International Power Electronics Conference, IPEC-Hiroshima - ECCE Asia 2014
PB - IEEE Computer Society
T2 - 7th International Power Electronics Conference, IPEC-Hiroshima - ECCE Asia 2014
Y2 - 18 May 2014 through 21 May 2014
ER -