Robust Droop Control of AC Microgrid Against Nonlinear Characteristic of Inductor

Wenbin Yuan; Yanbo Wang; Dong Liu; Fujin Deng; Zhe Chen

doi:10.1109/PEDG.2019.8807465

Robust Droop Control of AC Microgrid Against Nonlinear Characteristic of Inductor

Wenbin Yuan, Yanbo Wang, Dong Liu, Fujin Deng, Zhe Chen

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review

11 Citations (Scopus)

Abstract

This paper investigates the effect of nonlinear characteristic of filter inductor on power sharing performance of droop-controlled microgrid, and presents a robust droop control strategy to implement proportional reactive power sharing with immunity to nonlinear characteristic of filter inductor. Considering current-dependent soft-saturation natures of filter inductor, time-variant average model of inductor is first established to reveal the nonlinear inductance characteristic. Then, output impedance model of inverters with consideration of nonlinear inductor is derived to analyze the effect of nonlinear inductor on reactive power sharing characteristic. Furthermore, a robust droop control strategy is proposed to mitigate the effect of nonlinear inductor on reactive power sharing and implement proportional reactive power sharing under different load profiles. Simulation and experimental results show that the proposed droop control strategy is able to perform desirable power sharing with a good capability to reject nonlinear characteristic of filter inductor.

Original language	English
Title of host publication	Proceedings of the 10th International Symposium on Power Electronics for Distibuted Generation Systems (PEDG2019)
Number of pages	6
Publisher	IEEE Press
Publication date	Jun 2019
Pages	642-647
Article number	8807465
ISBN (Print)	978-1-7281-2456-8
ISBN (Electronic)	978-1-7281-2455-1
DOIs	https://doi.org/10.1109/PEDG.2019.8807465
Publication status	Published - Jun 2019
Event	10th International Symposium on Power Electronics for Distibuted Generation Systems - Xi'an, China Duration: 3 Jun 2019 → 6 Jun 2019 http://www.ieee-pedg.org/2020/page/15/past-conferences/

Conference

Conference	10th International Symposium on Power Electronics for Distibuted Generation Systems
Country/Territory	China
City	Xi'an
Period	03/06/2019 → 06/06/2019
Internet address	http://www.ieee-pedg.org/2020/page/15/past-conferences/

Series	IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG)
ISSN	2329-5767

Keywords

Nonlinear inductance model
powder core
reactive power sharing
robust Droop control
virtual impedance
AC microgrid

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10.1109/PEDG.2019.8807465

https://ieeexplore.ieee.org/document/8807465

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Cite this

Yuan, Wenbin ; Wang, Yanbo ; Liu, Dong et al. / Robust Droop Control of AC Microgrid Against Nonlinear Characteristic of Inductor. Proceedings of the 10th International Symposium on Power Electronics for Distibuted Generation Systems (PEDG2019). IEEE Press, 2019. pp. 642-647 (IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG) ).

@inproceedings{62f5106e17f048519aeffc175d7e89a2,

title = "Robust Droop Control of AC Microgrid Against Nonlinear Characteristic of Inductor",

abstract = "This paper investigates the effect of nonlinear characteristic of filter inductor on power sharing performance of droop-controlled microgrid, and presents a robust droop control strategy to implement proportional reactive power sharing with immunity to nonlinear characteristic of filter inductor. Considering current-dependent soft-saturation natures of filter inductor, time-variant average model of inductor is first established to reveal the nonlinear inductance characteristic. Then, output impedance model of inverters with consideration of nonlinear inductor is derived to analyze the effect of nonlinear inductor on reactive power sharing characteristic. Furthermore, a robust droop control strategy is proposed to mitigate the effect of nonlinear inductor on reactive power sharing and implement proportional reactive power sharing under different load profiles. Simulation and experimental results show that the proposed droop control strategy is able to perform desirable power sharing with a good capability to reject nonlinear characteristic of filter inductor.",

keywords = "Nonlinear inductance model, powder core, reactive power sharing, robust Droop control, virtual impedance, AC microgrid",

author = "Wenbin Yuan and Yanbo Wang and Dong Liu and Fujin Deng and Zhe Chen",

year = "2019",

month = jun,

doi = "10.1109/PEDG.2019.8807465",

language = "English",

isbn = "978-1-7281-2456-8",

series = "IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG) ",

pages = "642--647",

booktitle = "Proceedings of the 10th International Symposium on Power Electronics for Distibuted Generation Systems (PEDG2019)",

publisher = "IEEE Press",

note = "10th International Symposium on Power Electronics for Distibuted Generation Systems, PEDG 2019 ; Conference date: 03-06-2019 Through 06-06-2019",

url = "http://www.ieee-pedg.org/2020/page/15/past-conferences/",

}

Yuan, W, Wang, Y, Liu, D, Deng, F & Chen, Z 2019, Robust Droop Control of AC Microgrid Against Nonlinear Characteristic of Inductor. in Proceedings of the 10th International Symposium on Power Electronics for Distibuted Generation Systems (PEDG2019)., 8807465, IEEE Press, IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG) , pp. 642-647, 10th International Symposium on Power Electronics for Distibuted Generation Systems, Xi'an, China, 03/06/2019. https://doi.org/10.1109/PEDG.2019.8807465

Robust Droop Control of AC Microgrid Against Nonlinear Characteristic of Inductor. / Yuan, Wenbin; Wang, Yanbo; Liu, Dong et al.
Proceedings of the 10th International Symposium on Power Electronics for Distibuted Generation Systems (PEDG2019). IEEE Press, 2019. p. 642-647 8807465 (IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG) ).

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review

TY - GEN

T1 - Robust Droop Control of AC Microgrid Against Nonlinear Characteristic of Inductor

AU - Yuan, Wenbin

AU - Wang, Yanbo

AU - Liu, Dong

AU - Deng, Fujin

AU - Chen, Zhe

PY - 2019/6

Y1 - 2019/6

N2 - This paper investigates the effect of nonlinear characteristic of filter inductor on power sharing performance of droop-controlled microgrid, and presents a robust droop control strategy to implement proportional reactive power sharing with immunity to nonlinear characteristic of filter inductor. Considering current-dependent soft-saturation natures of filter inductor, time-variant average model of inductor is first established to reveal the nonlinear inductance characteristic. Then, output impedance model of inverters with consideration of nonlinear inductor is derived to analyze the effect of nonlinear inductor on reactive power sharing characteristic. Furthermore, a robust droop control strategy is proposed to mitigate the effect of nonlinear inductor on reactive power sharing and implement proportional reactive power sharing under different load profiles. Simulation and experimental results show that the proposed droop control strategy is able to perform desirable power sharing with a good capability to reject nonlinear characteristic of filter inductor.

AB - This paper investigates the effect of nonlinear characteristic of filter inductor on power sharing performance of droop-controlled microgrid, and presents a robust droop control strategy to implement proportional reactive power sharing with immunity to nonlinear characteristic of filter inductor. Considering current-dependent soft-saturation natures of filter inductor, time-variant average model of inductor is first established to reveal the nonlinear inductance characteristic. Then, output impedance model of inverters with consideration of nonlinear inductor is derived to analyze the effect of nonlinear inductor on reactive power sharing characteristic. Furthermore, a robust droop control strategy is proposed to mitigate the effect of nonlinear inductor on reactive power sharing and implement proportional reactive power sharing under different load profiles. Simulation and experimental results show that the proposed droop control strategy is able to perform desirable power sharing with a good capability to reject nonlinear characteristic of filter inductor.

KW - Nonlinear inductance model

KW - powder core

KW - reactive power sharing

KW - robust Droop control

KW - virtual impedance

KW - AC microgrid

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U2 - 10.1109/PEDG.2019.8807465

DO - 10.1109/PEDG.2019.8807465

M3 - Article in proceeding

SN - 978-1-7281-2456-8

T3 - IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG)

SP - 642

EP - 647

BT - Proceedings of the 10th International Symposium on Power Electronics for Distibuted Generation Systems (PEDG2019)

PB - IEEE Press

T2 - 10th International Symposium on Power Electronics for Distibuted Generation Systems

Y2 - 3 June 2019 through 6 June 2019

ER -

Yuan W, Wang Y, Liu D, Deng F, Chen Z. Robust Droop Control of AC Microgrid Against Nonlinear Characteristic of Inductor. In Proceedings of the 10th International Symposium on Power Electronics for Distibuted Generation Systems (PEDG2019). IEEE Press. 2019. p. 642-647. 8807465. (IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG) ). doi: 10.1109/PEDG.2019.8807465

Robust Droop Control of AC Microgrid Against Nonlinear Characteristic of Inductor

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