Konstantopoulos, G. orcid.org/0000-0003-3339-6921 and Alexandridis, A. (2018) Bidirectional dc/dc power converters with current limitation based on nonlinear control design. In: 2018 26th Mediterranean Conference on Control and Automation (MED). The 26th Mediterranean Conference on Control and Automation, 19-22 Jun 2018, Zadar, Croatia. IEEE , pp. 921-925.
Abstract
A new nonlinear controller for bidirectional dc/dc power converters that guarantees output voltage regulation with an inherent current limitation is proposed in this paper. In contrast to traditional single or cascaded PI controllers with a saturation unit that can lead to integrator windup and instability, the proposed controller is based on a rigorous nonlinear mathematical analysis and, using Lyapunov stability theory, it is proven that the current of the converter is always limited without the need of additional saturation units or limiters. The proposed concept introduces a virtual resistance at the input of the converter and a controllable voltage that can take both positive and negative values leading to bidirectional power flow capability. The dynamics of this voltage are proven to remain bounded and with a suitable choice of the voltage bound and the virtual resistance, the upper limit for the converter current is guaranteed at all times, even during transients. Simulation results for a bidirectional converter equipped with the proposed controller are presented to verify the current-limiting capability and the desired voltage regulation.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, 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 components of this work in other works. Reproduced in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Automatic Control and Systems Engineering (Sheffield) |
Funding Information: | Funder Grant number ROLLS-ROYCE PLC 5003228544 INNOVATE UK (TSB) 103910 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 11 May 2018 12:36 |
Last Modified: | 04 Oct 2018 13:46 |
Published Version: | https://doi.org/10.1109/MED.2018.8442745 |
Status: | Published |
Publisher: | IEEE |
Refereed: | Yes |
Identification Number: | 10.1109/MED.2018.8442745 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:130500 |