Design of Robust Distributed Control for Interconnected Microgrids

• Published in: IEEE transactions on smart grid Vol. 7; no. 6; pp. 2724 - 2735
• Main Authors: Hossain, Md Jahangir, Mahmud, Md Apel, Milano, Federico, Bacha, Seddik, Hably, Ahmad
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 01.11.2016; The Institute of Electrical and Electronics Engineers, Inc. (IEEE); Institute of Electrical and Electronics Engineers
• Subjects: Automatic; Computer simulation; Controllers; Decentralized control; distributed control; Disturbances; Dynamic models; Electric power; Electric power grids; Engineering Sciences; Load modeling; Microgrid; Microgrids; oscillation damping; Oscillations; Oscillators; robust control; Robustness; Stability; Time domain analysis; Voltage control; Wind turbines
• ISSN: 1949-3053; 1949-3061
• DOI: 10.1109/TSG.2015.2502618

This paper proposes a distributed control scheme to regulate the power flows among multiple microgrids operating in islanded mode. Each microgrid controller gathers information from neighboring microgrids and reduces dynamic interactions. Modal analysis and time-domain simulations are used to identify critical issues that degrade the stability of microgrids under different operating conditions. A case study comprising three interconnected microgrids is considered. Each microgrid includes distributed generation and is described through a detailed dynamic model. Time-domain analyses are carried out considering different scenarios and large disturbances. Simulation results indicate that, while conventional controllers can lead to poorly damped power oscillations among the interconnected microgrids, the proposed control scheme guarantees stability in the postdisturbance operating conditions.