IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society 2015
DOI: 10.1109/iecon.2015.7392484
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Discontinuous modulation of modular multilevel converters without the need for extra submodules

Abstract: Abstract-In this paper, a new approach to the discontinuous modulation technique for the operation of the modular multilevel converter (MMC) is presented. Discontinuous modulation is based on adding a zero-sequence to the original modulation signals so that each MMC arm is clamped to the upper or lower terminals of the dc-link bus during some intervals. In combination with a circulating current control, the original discontinuous modulation can reduce the capacitor voltage ripple amplitudes and the switching p… Show more

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Cited by 3 publications
(1 citation statement)
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“…The addition of SMs in the arms increases the cost of the MMC, but also provides extra benefits to the converter, such as fault tolerance capability and a further reduction in the capacitor voltage ripples [32]. Another possible solution consists on implementing an alternative discontinuous modulation technique [33], which does not require the use of additional SMs. Although this second solution does not increase the cost of the converter, the reduction of the capacitor voltage ripples (the main objective in this application) is not as efficient.…”
Section: Control Of the Circulating Current In Discontinuous Modulmentioning
confidence: 99%
“…The addition of SMs in the arms increases the cost of the MMC, but also provides extra benefits to the converter, such as fault tolerance capability and a further reduction in the capacitor voltage ripples [32]. Another possible solution consists on implementing an alternative discontinuous modulation technique [33], which does not require the use of additional SMs. Although this second solution does not increase the cost of the converter, the reduction of the capacitor voltage ripples (the main objective in this application) is not as efficient.…”
Section: Control Of the Circulating Current In Discontinuous Modulmentioning
confidence: 99%