A Consensus-Based Algorithm for Power Sharing and Voltage Regulation in DC Microgrids

Bo Fan, Shilin Guo, Jiangkai Peng, Qinmin Yang*, Wenxin Liu, Liming Liu

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

80 Citations (Scopus)
138 Downloads (Pure)

Abstract

In dc microgrids, load power sharing and bus voltage regulation are two common control objectives. In this article, a consensus-based algorithm is presented to achieve proportional power sharing and regulation of weighted geometric mean of bus voltages in dc microgrids with ZIP (constant impedance, constant current, and constant power) loads simultaneously. By using the virtue of the Laplacian matrices of undirected connected graphs, a lemma is derived to assist the stability analysis of the dc microgrids. Thus, a sufficient condition that stabilizes the system with ZIP loads is established. In addition, with the help of a distributed voltage regulation error estimator, the tuning of the bus voltages can be realized without the requirement on initial voltage conditions. Through the Lyapunov synthesis, the large-signal stability of the closed-loop system is theoretically ensured for a wide range of load conditions. Finally, simulation studies are performed to validate the merits of the proposed consensus-based algorithm.

Original languageEnglish
Article number8836491
JournalIEEE Transactions on Industrial Informatics
Volume16
Issue number6
Pages (from-to)3987-3996
Number of pages10
ISSN1551-3203
DOIs
Publication statusPublished - Jun 2020
Externally publishedYes

Bibliographical note

Funding Information:
Manuscript received August 7, 2019; accepted August 30, 2019. Date of publication September 13, 2019; date of current version February 28, 2020. This work was supported in part by the National Natural Science Foundation of China under Grant 61673347, Grant U1609214, and Grant 61751205, in part by the Key R&D Program of Zhejiang Province (No. 2019C01050), and in part by the U.S. Office of Naval Research under Grant N00014-16-1-3121 and Grant N00014-18-1-2185. Paper no. TII-19-3655. (Corresponding author: Qinmin Yang.) B. Fan and Q. Yang are with the State Key Laboratory of Industrial Control Technology, College of Control Science and Engineering, Zhe-jiang University, Hangzhou 310027, China (e-mail:,kanade@zju.edu.cn; qmyang@zju.edu.cn).

Publisher Copyright:
© 2005-2012 IEEE.

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

Keywords

  • Consensus algorithm
  • dc microgrid
  • Laplacian matrix
  • power sharing
  • voltage regulation

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