Distributed control framework and scalable small-signal stability analysis for dynamic microgrids

As a growing number of microgrids (MGs) has been integrated into the modern power grids, the interconnection and applicable cooperation among multiple MGs motivate the development of networked MGs. Dynamic MGs, as an advanced networked MGs structure, can not only integrate multiple MGs into the distribution system but also fulfill the requested system network reconfiguration with improved flexibility. A general distributed control approach for networked MGs is reviewed. A distributed control framework for dynamic MGs operation is developed, along with an extensible architecture with considerations of large-scale distributed energy resources (DERs) integration. A scalable small-signal stability analysis is conducted per the proposed distributed control strategies and the conditions under which the system is exponentially stable are derived. At last, the effectiveness of the proposed control framework and stability analysis are verified using a 6-bus test feeder.