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Control of a modular multilevel converter with pulsed DC load

Jankovic, Marija; Watson, Alan James; Costabeber, Alessando; Clare, Jon C.

Authors

Marija Jankovic Marija.Jankovic@nottingham.ac.uk

Alan James Watson alan.watson@nottingham.ac.uk

Alessando Costabeber alessandro.costabeber@nottingham.ac.uk

Jon C. Clare jon.clare@nottingham.ac.uk



Abstract

This paper focuses on a Modular Multilevel Converter grid interface for a klystron modulator system that behaves as a pulsed DC load. With such a load, and without mitigating control, the MMC suffers from cell capacitor voltage imbalance between the converter arms which leads to distortion (fluctuation) of the absorbed AC power. This paper proposes an augmented modulation strategy, with a tailored distribution of the modulation signals between the arms within a phase, to ensure low AC power fluctuation. The effectiveness of the method has been verified through simulation and has been experimentally proven on a 7 kW MMC prototype operating with a 3 kA pulsed DC load.

Start Date Sep 18, 2016
Publication Date Feb 16, 2017
Peer Reviewed Peer Reviewed
Book Title 2016 IEEE Energy Conversion Congress and Exposition (ECCE)
ISBN 978-1-5090-0737-0
APA6 Citation Jankovic, M., Watson, A. J., Costabeber, A., & Clare, J. C. (2017). Control of a modular multilevel converter with pulsed DC load. In 2016 IEEE Energy Conversion Congress and Exposition (ECCE)doi:10.1109/ECCE.2016.7854963
DOI https://doi.org/10.1109/ECCE.2016.7854963
Publisher URL https://ieeexplore.ieee.org/document/7854963/
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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