TY - GEN
T1 - Varying and unequal carrier frequency PWM techniques for modular multilevel converters
AU - Konstantinou, Georgios
AU - Darus, Rosheila
AU - Pou, Josep
AU - Ceballos, Salvador
AU - Agelidis, Vassilios G.
PY - 2014
Y1 - 2014
N2 - Carrier-based pulse-width modulation (PWM) strategies are commonly applied to modular multilevel converters (MMC). This paper proposes a modified PWM technique with unequal and varying carrier frequencies between consecutive levels. The variation between two consecutive carriers is calculated in order to maintain a constant average switching frequency regardless of modulation index and number of levels in the output. The proposed method effectively shifts the major harmonic content of output waveforms to higher frequencies at the cost of a slight increase in low order harmonics. Details on the derivation of the carrier frequencies as well as simulation and experimental results of the proposed method demonstrate the viability of the method as an alternative modulation technique for the MMC.
AB - Carrier-based pulse-width modulation (PWM) strategies are commonly applied to modular multilevel converters (MMC). This paper proposes a modified PWM technique with unequal and varying carrier frequencies between consecutive levels. The variation between two consecutive carriers is calculated in order to maintain a constant average switching frequency regardless of modulation index and number of levels in the output. The proposed method effectively shifts the major harmonic content of output waveforms to higher frequencies at the cost of a slight increase in low order harmonics. Details on the derivation of the carrier frequencies as well as simulation and experimental results of the proposed method demonstrate the viability of the method as an alternative modulation technique for the MMC.
KW - Pulse-width modulation
KW - carrier frequency
KW - modular multilevel converter
KW - multilevel converters
UR - http://www.scopus.com/inward/record.url?scp=84906693632&partnerID=8YFLogxK
U2 - 10.1109/IPEC.2014.6870038
DO - 10.1109/IPEC.2014.6870038
M3 - Conference contribution
AN - SCOPUS:84906693632
SN - 9781479927050
T3 - 2014 International Power Electronics Conference, IPEC-Hiroshima - ECCE Asia 2014
SP - 3758
EP - 3763
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 -