Virtual Resistance Tradeoff Design for DCMG Grid-Forming Converters Considering Static- And Large-Signal Dynamic Constraints

Wenqiang Xie; Minxiao Han; Wenyuan Cao; Josep M. Guerrero; Juan C. Vasquez

doi:10.1109/TPEL.2020.3029716

Virtual Resistance Tradeoff Design for DCMG Grid-Forming Converters Considering Static- And Large-Signal Dynamic Constraints

Wenqiang Xie^*, Minxiao Han, Wenyuan Cao, Josep M. Guerrero, Juan C. Vasquez

^*Corresponding author for this work

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

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Abstract

This article brings forward a design method of virtual resistance for droop-controlled dc microgrids (DCMGs). Although droop control is widely employed in coordinated DCMGs to coordinate different energy sources, few works address thoroughly the principles for a proper virtual resistance design. In this article, dynamic stability and static voltage deviation constraints are taken into consideration as the main criteria to be complied with by the virtual resistance design. In critical cases, constant power loads (CPLs) may substantially decrease system damping and adversely affects the stability of the system. In this sense, the large-signal stability model is developed including CPLs by using the Lyapunov function, and it is subsequently analyzed to infer the stability criterion. Theoretically, bus voltage is the most important index when addressing the DCMG control; hence, the impact of virtual resistance on the voltage deviation is explored as well. The research presented in this article finds out that virtual resistance influence on system stability is opposite to that on voltage deviation; thus, a tradeoff method based on the containment principle is developed. Throughout the proposed compromised design, we can adjust the weight coefficient to satisfy different performance requirements of DCMGs. The effectiveness of the proposed scheme is validated through experimental results.

Original language	English
Article number	9217938
Journal	IEEE Transactions on Power Electronics
Volume	36
Issue number	5
Pages (from-to)	5582-5593
Number of pages	12
ISSN	0885-8993
DOIs	https://doi.org/10.1109/TPEL.2020.3029716
Publication status	Published - May 2021

Bibliographical note

Funding Information:
Manuscript received March 11, 2020; revised June 28, 2020 and August 18, 2020; accepted October 6, 2020. Date of publication October 8, 2020; date of current version January 22, 2021. This work was supported in part by the National Key R&D Program of China under Grant 2018YFB0904700, in part by the Fundamental Research Funds for the Central Universities under Grant 2019QN119, and in part by the VILLUM FONDEN under the VILLUM Investigator Grant 25920: Center for Research on Microgrids. Recommended for publication by Associate Editor J. Liu. (Corresponding author: Wenqiang Xie.) Wenqiang Xie is with the School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China, and also with the Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark (e-mail: bjxiewenqiang@163.com).

Publisher Copyright:
© 1986-2012 IEEE.

Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.

Keywords

Compromised design
containment-based method
dc microgrids
droop control
Lyapunov function
stability constraint
voltage deviation

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@article{50e850902daf4d80bcdc1e7d85318dfa,

title = "Virtual Resistance Tradeoff Design for DCMG Grid-Forming Converters Considering Static- And Large-Signal Dynamic Constraints",

abstract = "This article brings forward a design method of virtual resistance for droop-controlled dc microgrids (DCMGs). Although droop control is widely employed in coordinated DCMGs to coordinate different energy sources, few works address thoroughly the principles for a proper virtual resistance design. In this article, dynamic stability and static voltage deviation constraints are taken into consideration as the main criteria to be complied with by the virtual resistance design. In critical cases, constant power loads (CPLs) may substantially decrease system damping and adversely affects the stability of the system. In this sense, the large-signal stability model is developed including CPLs by using the Lyapunov function, and it is subsequently analyzed to infer the stability criterion. Theoretically, bus voltage is the most important index when addressing the DCMG control; hence, the impact of virtual resistance on the voltage deviation is explored as well. The research presented in this article finds out that virtual resistance influence on system stability is opposite to that on voltage deviation; thus, a tradeoff method based on the containment principle is developed. Throughout the proposed compromised design, we can adjust the weight coefficient to satisfy different performance requirements of DCMGs. The effectiveness of the proposed scheme is validated through experimental results.",

keywords = "Compromised design, containment-based method, dc microgrids, droop control, Lyapunov function, stability constraint, voltage deviation",

author = "Wenqiang Xie and Minxiao Han and Wenyuan Cao and Guerrero, {Josep M.} and Vasquez, {Juan C.}",

note = "Funding Information: Manuscript received March 11, 2020; revised June 28, 2020 and August 18, 2020; accepted October 6, 2020. Date of publication October 8, 2020; date of current version January 22, 2021. This work was supported in part by the National Key R&D Program of China under Grant 2018YFB0904700, in part by the Fundamental Research Funds for the Central Universities under Grant 2019QN119, and in part by the VILLUM FONDEN under the VILLUM Investigator Grant 25920: Center for Research on Microgrids. Recommended for publication by Associate Editor J. Liu. (Corresponding author: Wenqiang Xie.) Wenqiang Xie is with the School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China, and also with the Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark (e-mail: bjxiewenqiang@163.com). Publisher Copyright: {\textcopyright} 1986-2012 IEEE. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.",

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AU - Han, Minxiao

AU - Cao, Wenyuan

AU - Guerrero, Josep M.

AU - Vasquez, Juan C.

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N2 - This article brings forward a design method of virtual resistance for droop-controlled dc microgrids (DCMGs). Although droop control is widely employed in coordinated DCMGs to coordinate different energy sources, few works address thoroughly the principles for a proper virtual resistance design. In this article, dynamic stability and static voltage deviation constraints are taken into consideration as the main criteria to be complied with by the virtual resistance design. In critical cases, constant power loads (CPLs) may substantially decrease system damping and adversely affects the stability of the system. In this sense, the large-signal stability model is developed including CPLs by using the Lyapunov function, and it is subsequently analyzed to infer the stability criterion. Theoretically, bus voltage is the most important index when addressing the DCMG control; hence, the impact of virtual resistance on the voltage deviation is explored as well. The research presented in this article finds out that virtual resistance influence on system stability is opposite to that on voltage deviation; thus, a tradeoff method based on the containment principle is developed. Throughout the proposed compromised design, we can adjust the weight coefficient to satisfy different performance requirements of DCMGs. The effectiveness of the proposed scheme is validated through experimental results.

AB - This article brings forward a design method of virtual resistance for droop-controlled dc microgrids (DCMGs). Although droop control is widely employed in coordinated DCMGs to coordinate different energy sources, few works address thoroughly the principles for a proper virtual resistance design. In this article, dynamic stability and static voltage deviation constraints are taken into consideration as the main criteria to be complied with by the virtual resistance design. In critical cases, constant power loads (CPLs) may substantially decrease system damping and adversely affects the stability of the system. In this sense, the large-signal stability model is developed including CPLs by using the Lyapunov function, and it is subsequently analyzed to infer the stability criterion. Theoretically, bus voltage is the most important index when addressing the DCMG control; hence, the impact of virtual resistance on the voltage deviation is explored as well. The research presented in this article finds out that virtual resistance influence on system stability is opposite to that on voltage deviation; thus, a tradeoff method based on the containment principle is developed. Throughout the proposed compromised design, we can adjust the weight coefficient to satisfy different performance requirements of DCMGs. The effectiveness of the proposed scheme is validated through experimental results.

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JF - IEEE Transactions on Power Electronics

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Virtual Resistance Tradeoff Design for DCMG Grid-Forming Converters Considering Static- And Large-Signal Dynamic Constraints

Abstract

Bibliographical note

Keywords

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