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

Gottardo, Davide; De Lillo, Liliana; Empringham, Lee; Costabeber, Alessando

Authors

Davide Gottardo

LEE EMPRINGHAM LEE.EMPRINGHAM@NOTTINGHAM.AC.UK
Professor of Power Conversion Technologies

Alessando Costabeber



Abstract

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.

Citation

Gottardo, D., De Lillo, L., Empringham, L., & Costabeber, A. (2017). Differential buck single phase grid connected AC-DC converter with active power decoupling using a flipping Capacitor.

Conference Name 8th International Symposium on Power Electronics for Distributed Generation Systems (PEDG 2017)
End Date Apr 20, 2017
Acceptance Date Feb 6, 2017
Online Publication Date Jul 11, 2017
Publication Date Apr 18, 2017
Deposit Date Sep 21, 2017
Publicly Available Date Mar 29, 2024
Peer Reviewed Peer Reviewed
Keywords Stress, Power electronics
Public URL https://nottingham-repository.worktribe.com/output/856278
Publisher URL http://ieeexplore.ieee.org/document/7972438/
Related Public URLs https://www.pedg2017.org/
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.

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