TY - GEN
T1 - Offset PWM in modular multilevel converters for stored arm energy reduction
AU - Konstantinou, Georgios
AU - Wickramasinghe, Harith R.
AU - Ceballos, Salvador
AU - Pou, Josep
N1 - Publisher Copyright:
© 2016 IEEE.
PY - 2016
Y1 - 2016
N2 - Modulation techniques for the modular multilevel converter consider that the total number of sub-modules in the phase-leg is, either instantaneously or on average, equal to N balancing the capacitor voltages to a constant reference. This paper proposes an offset PWM technique that utilises the total number of the SMs in the arms of the MMC, particularly under low modulation indices. The result is a reduction in the average voltage of the capacitor and consequently, the total energy stored in the converter. The proposed technique is investigated under open and closed-loop circulating current control and simulation and experimental results are provided to illustrate the operation of the converter.
AB - Modulation techniques for the modular multilevel converter consider that the total number of sub-modules in the phase-leg is, either instantaneously or on average, equal to N balancing the capacitor voltages to a constant reference. This paper proposes an offset PWM technique that utilises the total number of the SMs in the arms of the MMC, particularly under low modulation indices. The result is a reduction in the average voltage of the capacitor and consequently, the total energy stored in the converter. The proposed technique is investigated under open and closed-loop circulating current control and simulation and experimental results are provided to illustrate the operation of the converter.
KW - modular multilevel converter
KW - Multilevel converters
KW - pulse width modulation
UR - http://www.scopus.com/inward/record.url?scp=85015309800&partnerID=8YFLogxK
U2 - 10.1109/SPEC.2016.7846100
DO - 10.1109/SPEC.2016.7846100
M3 - Conference contribution
AN - SCOPUS:85015309800
T3 - 2016 IEEE 2nd Annual Southern Power Electronics Conference, SPEC 2016
BT - 2016 IEEE 2nd Annual Southern Power Electronics Conference, SPEC 2016
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2nd IEEE Annual Southern Power Electronics Conference, SPEC 2016
Y2 - 5 December 2016 through 8 December 2016
ER -