A Reactive Power-Voltage Control Strategy of an AC Microgrid Based on Adaptive Virtual Impedance

Yao Liu, Lin Guan, Fang Guo, Jianping Zheng, Jianfu Chen, Chao Liu and Josep M. Guerrero
Additional contact information
Yao Liu: School of Electric Power, South China University of Technology, Guangzhou 510640, China
Lin Guan: School of Electric Power, South China University of Technology, Guangzhou 510640, China
Fang Guo: School of Automation Foshan University, Foshan 528225, China
Jianping Zheng: Development Department of Guangdong Power Grid Corporation, Guangzhou 510030, China
Jianfu Chen: Zhuhai Power Supply Bureau of Guangdong Power Grid Corporation, Zhuhai 519000, China
Chao Liu: Zhuhai Power Supply Bureau of Guangdong Power Grid Corporation, Zhuhai 519000, China
Josep M. Guerrero: Department of Energy Technology, Aalborg University, DK-9220 Aalborg East, Denmark

Energies, 2019, vol. 12, issue 16, 1-15

Abstract: As an effective carrier of distributed generation, a microgrid is an effective way to ensure that distributed power can be reasonably utilized. However, due to the property of line impedance and other factors in a microgrid, reactive power supplied by distributed generation units cannot be shared rationally. To efficiently improve reactive power sharing, this paper proposes a reactive power-voltage control strategy based on adaptive virtual impedance. This method changes the voltage reference value by adding an adaptive term based on the traditional virtual impedance. Meanwhile, a voltage recovery mechanism was used to compensate the decline of distributed generation (DG) output voltage in the process. MATLAB/Simulink simulations and experimental results show that the proposed controller can effectively improve the steady state performance of the active and reactive power sharing. Finally, the feasibility and effectiveness of the proposed control strategy were verified.

Keywords: microgird; distributed power; adaptive virtual impedance; reactive power sharing; voltage recovery mechanism (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/12/16/3057/pdf (application/pdf)
https://www.mdpi.com/1996-1073/12/16/3057/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:12:y:2019:i:16:p:3057-:d:255906

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().