Experimental validation of a hybrid converter with enhanced switching ripple cancellation

Papadopoulos, Savvas; Klumpner, Christian; Rashed, Mohamed; Wheeler, Patrick

Abstract

This study presents the experimental evaluation of a proposed new three phase hybrid converter topology for medium voltage applications. The topology is based on the interconnection of a low switching frequency voltage source inverter (VSI), rated at medium voltage, with a high switching frequency low-power rated current source inverter (CSI). The main function of the shunt connected CSI is to cancel the large switching current ripple produced by the VSI while operating at a reduced fundamental voltage enabled by the use of series connected capacitors. The simulations and design procedure outline the possibility of achieving high output grid current quality whilst the added installed power by the CSI remains at <4% compared with the VSI. The experimental results show good correlation between analytical simulated targets of 20% maximum CSI voltage stress albeit with added installed power of 6.7% due to a larger amount of current ripple processed.

Citation

Papadopoulos, S., Klumpner, C., Rashed, M., & Wheeler, P. (2016). Experimental validation of a hybrid converter with enhanced switching ripple cancellation. IET Power Electronics, 9(12), 2360-2368. https://doi.org/10.1049/iet-pel.2015.0984

• Journal Article Type: Article
• Acceptance Date: Jun 9, 2016
• Online Publication Date: Oct 5, 2016
• Publication Date: Oct 5, 2016
• Deposit Date: Oct 5, 2016
• Publicly Available Date: Oct 5, 2016
• Journal: IET Power Electronics
• Electronic ISSN: 1755-4543
• Publisher: Institution of Engineering and Technology (IET)
• Peer Reviewed: Peer Reviewed
• Volume: 9
• Issue: 12
• Pages: 2360-2368
• DOI: https://doi.org/10.1049/iet-pel.2015.0984
• Keywords: High switching frequency low-KVA rated current source inverter; Hybrid converter; Series connected capacitors; CSI; Medium voltage applications; Enhanced switching ripple cancellation; Low switching frequency VSI interconnection; High output grid current
• Public URL: https://nottingham-repository.worktribe.com/output/824610
• Publisher URL: http://digital-library.theiet.org/content/journals/10.1049/iet-pel.2015.0984
• Additional Information: © 2016 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.
• Contract Date: Oct 5, 2016