High performance multilevel converter topology for interfacing energy storage systems with medium voltage grids

Rashed, Mohamed; Klumpner, Christian; Asher, Greg

Abstract

This paper proposes a high performance hybrid cascaded H-Bridge (HB) Multilevel Converter (MLC) with integrated Series Active Power Filter SAPF for interfacing energy storage systems with medium voltage grids. Isolated DC sources comprised of modular dual DC/DC converters and Medium Frequency Transformers MFT are used to energise the MLC HBs. The primary sides of the DC/DC converters are connected to a common low voltage DC bus, which is supplied by supercapacitors energy stacks. Simple hybrid stair-case/SVM modulation strategy is used to synthesise the converter output voltage waveforms and to guarantee even sharing of power between the converter’s HBs. The converter power losses and efficiency are evaluated and compared for two design cases of using small or large DC link capacitor banks. The converter is investigated under various operating conditions and the results show excellent dynamic and steady state performance.

• Publication Date: Nov 10, 2010
• Peer Reviewed: Peer Reviewed
• Book Title: IECON 2010 - 36th Annual Conference on IEEE Industrial Electronics Society
• Institution Citation: Rashed, M., Klumpner, C., & Asher, G. (2010). High performance multilevel converter topology for interfacing energy storage systems with medium voltage grids. In IECON 2010 - 36th Annual Conference on IEEE Industrial Electronics Societydoi:10.1109/IECON.2010.5675400
• DOI: https://doi.org/10.1109/IECON.2010.5675400
• Publisher URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5675400
• Copyright Statement: Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
• Additional Information: Published in: 36th Annual conference on IEEE Industrial Electronics Society, 7 - 10 November 2010, Renaissance Glendale Hotel & Spa, Glendale, AZ, USA : proceedings. Piscataway, N.J. : IEEE, 2010, p. 1825-1831. ISBN 9781424452255. doi:10.1109/IECON.2010.5675400