Schiffer, J, Ortega, R, Hans, CA et al. (1 more author) (2015) Droop-controlled inverter-based microgrids are robust to clock drifts. In: Proceedings of the American Control Conference. American Control Conference 2015, 01-03 Jul 2015, Chicago, IL. IEEE , 2341 - 2346. ISBN 978-1-4799-8685-9
Abstract
Clock drift in digital controllers is of great relevance in many applications. Since almost all real clocks exhibit drifts, this applies in particular to networks composed of several individual units, each of which being operated with its individual clock. In the present work, we investigate the effect of clock drifts in inverter-based microgrids. Via a suitable model that incorporates this phenomenon, we prove that clock inaccuracies hamper synchronization in microgrids, in which the individual inverters are operated with a fixed uniform constant electrical frequency. In addition, we show that the well-known frequency droop control renders stability of a lossless microgrid robust with respect to clock inaccuracies. This claim is established by using stability results reported previously by the authors for lossless inverter-based microgrids with ideal clocks. We also discuss the effect of clock drifts on active power sharing. The analysis is illustrated via a simulation example.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2015 AACC. This is an author produced version of a paper published in American Control Conference 2015. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Institute of Communication & Power Networks (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 01 Dec 2015 15:33 |
Last Modified: | 21 Jan 2018 07:56 |
Published Version: | http://dx.doi.org/10.1109/ACC.2015.7171082 |
Status: | Published |
Publisher: | IEEE |
Identification Number: | 10.1109/ACC.2015.7171082 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:92368 |