NDLI: Discontinuous modulation of modular multilevel converters without the need for extra submodules

Content Provider	IEEE Xplore Digital Library
Author	Picas, R. Ceballos, S. Pou, J. Zaragoza, J. Konstantinou, G. Agelidis, V.G. Balcells, J.
Copyright Year	2015
Description	Author affiliation: Terrassa Ind. Electron. Group, Tech. Univ. of Catalonia, Terrassa, Spain (Picas, R.; Zaragoza, J.; Balcells, J.) \|\| Australian Energy Res. Institutute, Univ. of New South Wales, Sydney, NSW, Australia (Pou, J.; Konstantinou, G.; Agelidis, V.G.) \|\| Energy Unit, Tecnalia Res. & Innovation, Derio, Spain (Ceballos, S.)
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 power losses. However, additional submodules (SMs) are required to control the circulating current. This new approach presents a clamping algorithm that eliminates the requirement of additional SMs. As a result, the conduction losses are reduced while the capacitor voltage ripples are maintained low. Simulation and experimental results on a silicon-carbide-based MMC are reported and compared against the original discontinuous modulation and a conventional carrier-based pulse-width modulation.
Sponsorship	IEEE
Starting Page	002538
Ending Page	002543
File Size	1906820
Page Count	6
File Format	PDF
e-ISBN	9781479917624
DOI	10.1109/IECON.2015.7392484
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-11-09
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Capacitors Switches Clamps Phase modulation Voltage control Converters silicon carbide Capacitor voltage ripples discontinuous modulation efficiency improvement modular multilevel converter
Content Type	Text
Resource Type	Article

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