Control of a modular multilevel converter with pulsed DC load

Jankovic, Marija; Watson, Alan; Costabeber, Alessando; Clare, Jon

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.

Citation

Jankovic, M., Watson, A., Costabeber, A., & Clare, J. (2016). Control of a modular multilevel converter with pulsed DC load. In 2016 IEEE Energy Conversion Congress and Exposition (ECCE) (1-8). https://doi.org/10.1109/ECCE.2016.7854963

• Conference Name: 2016 IEEE Energy Conversion Congress and Exposition (ECCE)
• Conference Location: Milwaukee, WI, USA
• Start Date: Sep 18, 2016
• End Date: Sep 22, 2016
• Acceptance Date: Jul 8, 2016
• Online Publication Date: Feb 16, 2017
• Publication Date: 2016
• Deposit Date: Jul 14, 2016
• Publicly Available Date: Dec 31, 2016
• Peer Reviewed: Peer Reviewed
• Pages: 1-8
• Book Title: 2016 IEEE Energy Conversion Congress and Exposition (ECCE)
• ISBN: 978-1-5090-0738-7
• DOI: https://doi.org/10.1109/ECCE.2016.7854963
• Public URL: https://nottingham-repository.worktribe.com/output/801756
• Publisher URL: https://ieeexplore.ieee.org/document/7854963/