Zero-Current Switching (ZCS) for a High Step Ratio Modular Multilevel dc-dc Converter with wide voltage range operation

Pineda, Cristian; Pereda, Javier; Burgos-Mellado, Claudio; Watson, Alan; Rojas, Felix

Abstract

© 2020 IEEE. The rise of new dc technologies is pushing the development of highly efficient dc-dc converters, especially at high voltage and high step ratio. Modular multilevel converters (MMCs) are an attractive alternative because they can manage medium and high dc voltages with standard semiconductor devices with high efficiency if they employ soft-switching techniques. However, the latest soft-switching techniques have been proposed for fixed voltage range, limiting their operation. This paper proposes a soft-switching modulation for the high step ratio Modular Multilevel dc-dc Converter in extended voltage range. The proposal achieves zero-current switching and regulates the voltage balance among the floating cell capacitors, while using a simple control scheme to regulate the output voltage. The theoretical analysis has been verified with full-scale simulations, demonstrating excellent dynamic response and reduced rms current.

Citation

Pineda, C., Pereda, J., Burgos-Mellado, C., Watson, A., & Rojas, F. (2020, November). Zero-Current Switching (ZCS) for a High Step Ratio Modular Multilevel dc-dc Converter with wide voltage range operation. Presented at 2020 IEEE 21st Workshop on Control and Modeling for Power Electronics (COMPEL), Aalborg, Denmark

• Presentation Conference Type: Edited Proceedings
• Conference Name: 2020 IEEE 21st Workshop on Control and Modeling for Power Electronics (COMPEL)
• Start Date: Nov 9, 2020
• End Date: Nov 12, 2020
• Acceptance Date: Oct 1, 2020
• Online Publication Date: Nov 30, 2020
• Publication Date: Nov 9, 2020
• Deposit Date: Jan 18, 2021
• Publicly Available Date: Jan 18, 2021
• Pages: 1-8
• Series ISSN: 1093-5142
• Book Title: 2020 IEEE 21st Workshop on Control and Modeling for Power Electronics (COMPEL)
• ISBN: 978-1-7281-7161-6
• DOI: https://doi.org/10.1109/compel49091.2020.9265848
• Public URL: https://nottingham-repository.worktribe.com/output/5207338
• Publisher URL: https://ieeexplore.ieee.org/document/9265848
• Additional Information: © 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, 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 component of this work in other works.