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

2019; Institute of Electrical and Electronics Engineers; Volume: 11; Issue: 2 Linguagem: Inglês

10.1109/tsg.2019.2928330

1949-3061

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

Islanding Detection in Power Systems

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.