Discrete-Time Self-Triggered Control of DC Microgrids with Data Dropouts and Communication Delays

Jiangkai Peng; Bo Fan; Hao Xu; Wenxin Liu

doi:10.1109/TSG.2020.3000138

Discrete-Time Self-Triggered Control of DC Microgrids with Data Dropouts and Communication Delays

Jiangkai Peng, Bo Fan, Hao Xu^*, Wenxin Liu

^*Corresponding author for this work

Research output: Contribution to journal › Journal article › Research › peer-review

23 Citations (Scopus)

Abstract

In this paper, a novel discrete-time self-triggered (DTST) distributed controller is developed for DC microgrids with data dropouts and communication delays. To meet the discrete-time (DT) nature of digital systems, a DT distributed controller is first proposed to achieve load current sharing and average voltage regulation simultaneously in DC microgrids. To further relax the communication restrictions, a novel self-triggered mechanism is developed and integrated along with the DT controller, where the local controller proactively estimates the next communication instant ahead of time. Since the controller can only be triggered at DT instants, the Zeno phenomenon is avoided. Moreover, an algorithm is further proposed to compensate for the effect of data dropouts and communication delays. Through Lyapunov synthesis, stability and convergence of the closed-loop system with the proposed design is guaranteed. Finally, detailed simulation studies validate the effectiveness of the proposed DTST controller under communication imperfections.

Original language	English
Article number	9110624
Journal	IEEE Transactions on Smart Grid
Volume	11
Issue number	6
Pages (from-to)	4626-4636
Number of pages	11
ISSN	1949-3053
DOIs	https://doi.org/10.1109/TSG.2020.3000138
Publication status	Published - Nov 2020
Externally published	Yes

Bibliographical note

Funding Information:
Manuscript received November 27, 2019; revised April 2, 2020; accepted May 10, 2020. Date of publication June 8, 2020; date of current version October 21, 2020. This work was supported by the U.S. Office of Naval Research under Grant N00014-16-1-3121 and Grant N00014-18-1-2185. Paper no. TSG-01787-2019. (Corresponding author: Hao Xu.) Jiangkai Peng and Wenxin Liu are with the Smart Microgrid and Renewable Technology Research Laboratory, Department of Electrical and Computer Engineering, Lehigh University, Bethlehem, PA 18015 USA.

Publisher Copyright:
© 2010-2012 IEEE.

Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.

Keywords

communication delay
current sharing
DC microgrid
distributed control
self-triggered control
voltage regulation

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Cite this

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title = "Discrete-Time Self-Triggered Control of DC Microgrids with Data Dropouts and Communication Delays",

abstract = "In this paper, a novel discrete-time self-triggered (DTST) distributed controller is developed for DC microgrids with data dropouts and communication delays. To meet the discrete-time (DT) nature of digital systems, a DT distributed controller is first proposed to achieve load current sharing and average voltage regulation simultaneously in DC microgrids. To further relax the communication restrictions, a novel self-triggered mechanism is developed and integrated along with the DT controller, where the local controller proactively estimates the next communication instant ahead of time. Since the controller can only be triggered at DT instants, the Zeno phenomenon is avoided. Moreover, an algorithm is further proposed to compensate for the effect of data dropouts and communication delays. Through Lyapunov synthesis, stability and convergence of the closed-loop system with the proposed design is guaranteed. Finally, detailed simulation studies validate the effectiveness of the proposed DTST controller under communication imperfections.",

keywords = "communication delay, current sharing, DC microgrid, distributed control, self-triggered control, voltage regulation",

author = "Jiangkai Peng and Bo Fan and Hao Xu and Wenxin Liu",

note = "Funding Information: Manuscript received November 27, 2019; revised April 2, 2020; accepted May 10, 2020. Date of publication June 8, 2020; date of current version October 21, 2020. This work was supported by the U.S. Office of Naval Research under Grant N00014-16-1-3121 and Grant N00014-18-1-2185. Paper no. TSG-01787-2019. (Corresponding author: Hao Xu.) Jiangkai Peng and Wenxin Liu are with the Smart Microgrid and Renewable Technology Research Laboratory, Department of Electrical and Computer Engineering, Lehigh University, Bethlehem, PA 18015 USA. Publisher Copyright: {\textcopyright} 2010-2012 IEEE. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",

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language = "English",

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N2 - In this paper, a novel discrete-time self-triggered (DTST) distributed controller is developed for DC microgrids with data dropouts and communication delays. To meet the discrete-time (DT) nature of digital systems, a DT distributed controller is first proposed to achieve load current sharing and average voltage regulation simultaneously in DC microgrids. To further relax the communication restrictions, a novel self-triggered mechanism is developed and integrated along with the DT controller, where the local controller proactively estimates the next communication instant ahead of time. Since the controller can only be triggered at DT instants, the Zeno phenomenon is avoided. Moreover, an algorithm is further proposed to compensate for the effect of data dropouts and communication delays. Through Lyapunov synthesis, stability and convergence of the closed-loop system with the proposed design is guaranteed. Finally, detailed simulation studies validate the effectiveness of the proposed DTST controller under communication imperfections.

AB - In this paper, a novel discrete-time self-triggered (DTST) distributed controller is developed for DC microgrids with data dropouts and communication delays. To meet the discrete-time (DT) nature of digital systems, a DT distributed controller is first proposed to achieve load current sharing and average voltage regulation simultaneously in DC microgrids. To further relax the communication restrictions, a novel self-triggered mechanism is developed and integrated along with the DT controller, where the local controller proactively estimates the next communication instant ahead of time. Since the controller can only be triggered at DT instants, the Zeno phenomenon is avoided. Moreover, an algorithm is further proposed to compensate for the effect of data dropouts and communication delays. Through Lyapunov synthesis, stability and convergence of the closed-loop system with the proposed design is guaranteed. Finally, detailed simulation studies validate the effectiveness of the proposed DTST controller under communication imperfections.

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Discrete-Time Self-Triggered Control of DC Microgrids with Data Dropouts and Communication Delays

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