A Two-Layer Distributed Control Method for Islanded Networked Microgrid Systems
Abstract
This paper presents a two-layer, four-level distributed control method for networked microgrid (NMG) systems, taking into account the proprietary nature of microgrid (MG) owners. The proposed control architecture consists of a MG-control layer and a NMG-control layer. In the MG layer, the primary and distrib-uted secondary control 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, the distributed quaternary control restores 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 dynamic performance of NMG systems with the proposed control method. Time-domain simulations as well as experiments on NMG test systems are performed to validate the effectiveness of the proposed method.
Keywords
Cite
@article{arxiv.1810.08367,
title = {A Two-Layer Distributed Control Method for Islanded Networked Microgrid Systems},
author = {Xiaoyu Wu and Yin Xu and Xiangyu Wu and Jinghan He and Josep M. Guerrero and Chen-Ching Liu and Kevin P. Schneider and Dan T. Ton},
journal= {arXiv preprint arXiv:1810.08367},
year = {2019}
}