Braitor, A-C., Konstantopoulos, G. and Kadirkamanathan, V. (2017) Power sharing of parallel operated DC-DC converters using current-limiting droop control. In: 2017 25th Mediterranean Conference on Control and Automation (MED). 2017 25th Mediterranean Conference on Control and Automation (MED), 03-06 Jul 2017, Valletta. Malta. IEEE , pp. 528-533. ISBN 978-1-5090-4533-4
Abstract
In this paper, a nonlinear current-limiting droop controller is proposed to achieve accurate power sharing among parallel operated DC-DC boost converters in a DC micro-grid application. In particular, the recently developed robust droop controller is adopted and implemented as a dynamic virtual resistance in series with the inductance of each DC-DC boost converter. Opposed to the traditional approaches that use small-signal modeling, the proposed control design takes into account the accurate nonlinear dynamic model of each converter and it is analytically proven that accurate power sharing can be accomplished with an inherent current limitation for each converter independently using input-to-state stability theory. When the load requests more power that exceeds the capacity of the converters, the current-limiting capability of the proposed control method protects the devices by limiting the inductor current of each converter below a given maximum value. Extensive simulation results of two paralleled DC-DC boost converters are presented to verify the power sharing and current-limiting properties of the proposed controller under several changes of the load.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 IEEE. This is an author produced version of a paper subsequently published in 2017 25th Mediterranean Conference on Control and Automation (MED). Uploaded 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) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 19 May 2017 08:26 |
Last Modified: | 19 Dec 2022 13:35 |
Published Version: | https://doi.org/10.1109/MED.2017.7984171 |
Status: | Published |
Publisher: | IEEE |
Refereed: | Yes |
Identification Number: | 10.1109/MED.2017.7984171 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:116371 |