Dedeoglu, S. and Konstantopoulos, G.C. orcid.org/0000-0003-3339-6921 (2019) PLL-less three-phase droop-controlled inverter with inherent current-limiting property. In: IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society. IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society, 14-17 Oct 2019, Lisbon, Portugal. IEEE , pp. 4013-4018. ISBN 9781728148793
Abstract
In this paper, a novel droop control method for three-phase grid-connected inverters is proposed to guarantee closed-loop system stability and an inherent current-limiting property without the need of a PLL. The inverter is connected to the grid via a filter and a line. Based on the synchronously rotating dq frame modelling and nonlinear ultimate boundedness theory, it is analytically proven that the proposed control scheme maintains the inverter current below a certain upper bound. This current limitation is guaranteed independently of the grid, line and filter parameters; thus increasing the controller robustness. In addition, asymptotic stability of the desired equilibrium point of the closed-loop system is guaranteed under different values of the proposed controller gain. To verify the effectiveness of the proposed nonlinear control strategy, extensive simulations are realized using Matlab/Simulink, where both the stability and the current-limiting property of the controller are validated.
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; current limitation; reference frame; stability analysis; three-phase inverter; PLL-less implementation |
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; EP/S031863/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 10 Jan 2020 12:36 |
Last Modified: | 09 Dec 2020 01:38 |
Status: | Published |
Publisher: | IEEE |
Refereed: | Yes |
Identification Number: | 10.1109/iecon.2019.8927219 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:155482 |