Control Method of Parallel Inverters with Self-Synchronizing Characteristics in Distributed Microgrid

Xiangwu Yan, Yang Cui and Sen Cui
Additional contact information
Xiangwu Yan: Key Laboratory of Distributed Energy Storage and Micro-Grid in Hebei, North China Electric Power University, Baoding 071003, Hebei, China
Yang Cui: School of Electrical and Electric Engineering, North China Electric Power University, Changping District, Beijing 102206, China
Sen Cui: School of Electrical and Electric Engineering, North China Electric Power University, Changping District, Beijing 102206, China

Energies, 2019, vol. 12, issue 20, 1-20

Abstract: The centralized control mode is no longer applicable for microgrid operation due to the high penetration rate of distributed energy, which is responsible for the widespread interest in the use of the distributed microgrid. Focusing on the issues of power coupling and uncontrollable droop coefficient at the terminal of the connecting line between the micro-source and AC bus, which is rarely considered, this paper proposes an improved virtual synchronous generator (VSG) control strategy based on local data considering precise control of the droop coefficient and realizing the power decoupling and the expected droop characteristics. Then, combined with the virtual rotor characteristic matching method, the reasonable active and reactive power sharing of the parallel microgrid inverters are realized in terms of static and dynamic performance without additional improvement of reactive power control. Finally, the effectiveness and feasibility of the proposed method are verified based on the MATLAB/Simulink simulation platform. The combination of the proved strategy and matching principle endows inverters with self-synchronization characteristics, forming the self-synchronizing voltage sources, which gives the distributed microgrid a higher self-stability, autonomy and robustness to ensure the stable operation of the microgrid.

Keywords: distributed microgrid; virtual synchronous generator (VSG); self-synchronizing voltage source; power coupling; parallel operation (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: View citations in EconPapers (5)

Downloads: (external link)
https://www.mdpi.com/1996-1073/12/20/3871/pdf (application/pdf)
https://www.mdpi.com/1996-1073/12/20/3871/ (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:20:p:3871-:d:275912

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 ().