A Two-layer Distributed Cooperative Control Method for Islanded Networked Microgrid Systems

Xiaoyu Wu, Yin Xu, Xiangyu Wu, Jinghan He, Josep M. Guerrero, Chen-Ching Liu, Kevin P. Schneider, Dan T. Ton

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7 Citations (Scopus)
53 Downloads (Pure)

Abstract

This paper presents a two-layer distributed cooperative control method for networked microgrid (NMG) systems, taking into account the proprietary nature of microgrid (MG) owners. The proposed control architecture consists of an MG-control layer and an NMG-control layer. In the MG layer, the primary and distributed secondary controls realize accurate power sharing among distributed generators (DGs) and the frequency/voltage reference following within each MG. In the NMG layer, the tertiary control enables regulation of the power flowing through the point of common coupling (PCC) of each MG in a decentralized manner. Furthermore, distributed quaternary control restores the system frequency and critical bus voltage to their nominal values and ensures accurate power sharing among MGs. A small-signal dynamic model is developed to evaluate the dynamic performance of NMG systems with the proposed control method. Time-domain simulations and experiments on NMG test systems are performed to validate the effectiveness of the proposed method.
Original languageEnglish
Article number8760423
JournalIEEE Transactions on Smart Grid
Volume11
Issue number2
Pages (from-to)942-957
Number of pages16
ISSN1949-3053
DOIs
Publication statusPublished - Mar 2020

Keywords

  • distributed cooperative control
  • hierarchical control
  • Networked microgrids
  • resiliency
  • small-signal stability

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