Dedeoglu, S. orcid.org/0000-0001-7969-011X and Konstantopoulos, G.C. orcid.org/0000-0003-3339-6921 (2021) Avoiding circulating current via current-limiting control in AC microgrids with parallel three-phase inverters. In: IECON 2021 – 47th Annual Conference of the IEEE Industrial Electronics Society. IECON 2021 – 47th Annual Conference of the IEEE Industrial Electronics Society, 13-16 Oct 2021, Toronto, ON, Canada (virtual). Institute of Electrical and Electronics Engineers ISBN 9781665402569
Abstract
In this paper, an AC microgrid consisting of paralleled three-phase inverters is investigated and a nonlinear droop controller is proposed. The purpose of the proposed controller is twofold: i) to avoid circulating power among the paralleled inverters and ii) to guarantee a current-limiting property at each inverter in both stand-alone and grid-connected modes, as well as during the transition between them. Contrary to the existing methods that utilize saturation blocks to limit the reference current value, the proposed controller limits the instantaneous value of the current even after extreme faults, i.e., short circuits in both grid-connected and stand-alone cases. Moreover, after incorporating the proposed controller dynamics into the system, the entire microgrid small-signal stability analysis is investigated. In order to validate the effectiveness of proposed controller, a microgrid, which includes three parallel three-phase inverters, is being tested via Matlab/Simulink software and extensive simulation results are provided.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2021 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. |
Keywords: | Nonlinear droop control; current limitation; circulating power; DC-link voltage control; stand-alone state; grid-connected state; parallel inverter operation; stability analysis |
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 Engineering and Physical Sciences Research Council EP/S001107/1; EP/S031863/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 15 Nov 2021 08:42 |
Last Modified: | 10 Nov 2022 01:13 |
Status: | Published |
Publisher: | Institute of Electrical and Electronics Engineers |
Refereed: | Yes |
Identification Number: | 10.1109/iecon48115.2021.9589420 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:180373 |