Differential buck single phase grid connected AC-DC converter with active power decoupling using a flipping Capacitor

Gottardo, Davide, De Lillo, Liliana, Empringham, Lee and Costabeber, Alessando (2017) Differential buck single phase grid connected AC-DC converter with active power decoupling using a flipping Capacitor. In: 8th International Symposium on Power Electronics for Distributed Generation Systems (PEDG 2017), 17-20 Apr 2017, Florianópolis, Brazil.

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This paper introduces a new single-phase AC-DC converter capable of achieving independent voltage control across a dedicated power decoupling capacitor, by exploiting the same full bridge that controls the grid current in combination with two bidirectional switches, soft com¬mutated at the line frequency (ZVS). A suitable control of the capacitor voltage is used to completely decouple pulsating grid power from the DC-link, enabling the use of smaller film capacitors instead of electrolytic capacitors for power decoupling, improving reliability and increasing power density. This is achieved without additional high switching frequency devices. Furthermore, the interference occurring between rectified grid current and power decoupling capac¬itor current is exploited in order to reduce the RMS current in the full bridge, thus improving conversion efficiency.

This work is being developed at University of Nottingham within the framework of project SENSIBLE.

Item Type: Conference or Workshop Item (Paper)
RIS ID: https://nottingham-repository.worktribe.com/output/856278
Additional Information: © 2017 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. This conference is published at ISSN 2329-5767.
Keywords: Stress, Power electronics
Schools/Departments: University of Nottingham, UK > Faculty of Engineering > Department of Electrical and Electronic Engineering
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Depositing User: Burns, Rebecca
Date Deposited: 21 Sep 2017 08:30
Last Modified: 04 May 2020 18:42
URI: https://eprints.nottingham.ac.uk/id/eprint/46550

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