Masud, Z., Paspatis, A.G. orcid.org/0000-0002-3479-019X and Konstantopoulos, G.C. orcid.org/0000-0003-3339-6921 (2019) Current-limiting droop controller for single-phase inverters operating in island mode. In: 45th Annual Conference of the IEEE Industrial Electronics Society (IECON 2019) Proceedings. 45th Annual Conference of the IEEE Industrial Electronics Society (IECON 2019), 14-17 Oct 2019, Lisbon, Portugal. IEEE , pp. 1659-1664. ISBN 978-1-7281-4878-6
Abstract
In this paper, a current-limiting droop controller with nonlinear dynamics is proposed for the stand-alone operation of single-phase inverters. The proposed controller regulates the voltage and frequency of the load depending on the real and reactive power demand, as required in modern ac micro- grids. The dynamic performance of inverters equipped with the proposed control scheme is investigated under different load conditions (linear and non-linear loads) and their current-limiting property is analytically proven to hold at all times using nonlinear ultimate boundedness theory. Then, the closed-loop stability of a single-phase inverter operating in island mode is proven for the first time using both a resistive and a constant power load. The desired controller performance is experimentally validated on a testbed consisting of a single-phase inverter connected to a linear (resistive) and a nonlinear (diode rectifier) load, where the ability of the proposed controller to operate in the droop control mode while maintaining the desired current limitation is proven under various load changes.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019 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 control; single-phase inverter; current limitation; 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 Science Research Council (EPSRC) EP/S001107/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 21 Aug 2019 09:46 |
Last Modified: | 09 Dec 2020 01:38 |
Status: | Published |
Publisher: | IEEE |
Refereed: | Yes |
Identification Number: | 10.1109/IECON.2019.8926865 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:149786 |