Modular Multilevel Converter leg-energy controller in rotating reference frame for voltage oscillations reduction

This work consists of the presentation of a regulation strategy capable of controlling the energy stored in the DC capacitors of the upper and lower arms of a Modular Multilevel Converter (MMC) for each phase. This is achieved by regulating the positive, negative and zero sequences in dqo coordinate...

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Bibliographic Details
Published in2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG) pp. 698 - 703
Main Authors Bergna, G., Vannier, J. C., Lefranc, P., Arzande, A., Berne, E., Egrot, P., Molinas, M.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.06.2012
Subjects
Capacitors
Distributed power generation
Equations
Frequency control
Mathematical model
Oscillators
Power electronics
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Summary:This work consists of the presentation of a regulation strategy capable of controlling the energy stored in the DC capacitors of the upper and lower arms of a Modular Multilevel Converter (MMC) for each phase. This is achieved by regulating the positive, negative and zero sequences in dqo coordinates of the differential current using a rotating reference frame at twice the fundamental value. Active and reactive components of the differential current are used to eliminate the oscillations of the three-phased leg-energy which reduces significantly the capacitor voltage oscillations, while the zero sequence component is used to regulate the whole system energy at a given value. All feed-forwards equations are demonstrated, and cross-coupled leg-energy terms are introduced.
ISBN:9781467320214
1467320218
ISSN:2329-5759
DOI:10.1109/PEDG.2012.6254078