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Arm balancing control and experimental validation of a grid connected MMC with pulsed DC load

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

Authors

Marija Jankovic Marija.Jankovic@nottingham.ac.uk

Alessando Costabeber alessandro.costabeber@nottingham.ac.uk

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

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



Abstract

This paper focuses on the operation of a grid connected Modular Multilevel Converter (MMC) supplying a pulsed DC load. The goal is to achieve minimum AC power fluctuation despite the high power fluctuation present on the DC side. The MMC has been selected for its inherent ability to decouple AC and DC current controllers. How¬ever, if no additional provisions are taken, the pulsed load causes imbalance of cell capacitor voltages between upper and lower arm in each phase. The paper presents the the-oretical analysis of the imbalance problem, and proposes a simple arm balancing controller to enable the operation of the converter under pulsed DC load. The effectiveness of the controller has been successfully verified on a 7 kW MMC experimental prototype with a 3 kA pulsed DC load.

Journal Article Type Article
Journal IEEE Transactions on Industrial Electronics
Print ISSN 0278-0046
Electronic ISSN 1557-9948
Publisher Institute of Electrical and Electronics Engineers
Peer Reviewed Peer Reviewed
Issue 99
APA6 Citation Jankovic, M., Costabeber, A., Watson, A. J., & Clare, J. C. (in press). Arm balancing control and experimental validation of a grid connected MMC with pulsed DC load. IEEE Transactions on Industrial Electronics, doi:10.1109/TIE.2017.2711516
DOI https://doi.org/10.1109/TIE.2017.2711516
Keywords Arm balancing control, Grid-connected converter, Modular Multilevel Converter, Pulsed power
Publisher URL http://ieeexplore.ieee.org/document/7938353/
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.

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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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