Offset PWM in modular multilevel converters for stored arm energy reduction

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URI: https://hdl.handle.net/11556/2217
ISBN: 9781509015467
DOI: 10.1109/SPEC.2016.7846100
Publication date
2016
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Institute of Electrical and Electronics Engineers Inc.
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Abstract
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.
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Publisher Copyright: © 2016 IEEE.
Keywords
modular multilevel converter , Multilevel converters , pulse width modulation , Energy Engineering and Power Technology , Electrical and Electronic Engineering
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conference output
Citation
Konstantinou , G , Wickramasinghe , H R , Ceballos , S & Pou , J 2016 , Offset PWM in modular multilevel converters for stored arm energy reduction . in 2016 IEEE 2nd Annual Southern Power Electronics Conference, SPEC 2016 . , 7846100 , 2016 IEEE 2nd Annual Southern Power Electronics Conference, SPEC 2016 , Institute of Electrical and Electronics Engineers Inc. , 2nd IEEE Annual Southern Power Electronics Conference, SPEC 2016 , Auckland , New Zealand , 5/12/16 . https://doi.org/10.1109/SPEC.2016.7846100
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