Optimal Cooperative Secondary Control for Islanded DC Microgrids via a Fully Actuated Approach

Yu，Yi1; Liu，Guo Ping1; Huang，Yi2; Shi，Peng3,4

2024-02-01

10.1109/JAS.2023.123942

IEEE/CAA Journal of Automatica Sinica   影响因子和分区

2329-9266

2329-9274

DC-DC converter-based multi-bus DC microgrids (MGs) in series have received much attention, where the conflict between voltage recovery and current balancing has been a hot topic. The lack of models that accurately portray the electrical characteristics of actual MGs while is controller design-friendly has kept the issue active. To this end, this paper establishes a large-signal model containing the comprehensive dynamical behavior of the DC MGs based on the theory of high-order fully actuated systems, and proposes distributed optimal control based on this. The proposed secondary control method can achieve the two goals of voltage recovery and current sharing for multi-bus DC MGs. Additionally, the simple structure of the proposed approach is similar to one based on droop control, which allows this control technique to be easily implemented in a variety of modern microgrids with different configurations. In contrast to existing studies, the process of controller design in this paper is closely tied to the actual dynamics of the MGs. It is a prominent feature that enables engineers to customize the performance metrics of the system. In addition, the analysis of the stability of the closed-loop DC microgrid system, as well as the optimality and consensus of current sharing are given. Finally, a scaled-down solar and battery-based microgrid prototype with maximum power point tracking controller is developed in the laboratory to experimentally test the efficacy of the proposed control method.

DC microgrids distributed control high-order fully actuated system approach linear quadratic regulator microgrid modeling secondary control

SCI ; EI

英语

第一

2-s2.0-85184655098

Scopus

1.Shenzhen Key Laboratory of Control Theory and Intelligent Systems,Southern University of Science and Technology,Shenzhen,518055,China
2.School of Electrical Engineering and Automation,Wuhan University,Wuhan,430072,China
3.School of Electrical and Mechanical Engineering,The University of Adelaide,5005,Australia
4.Research and Innovation Centre,Obuda University,Budapest,1034,Hungary

Yu，Yi,Liu，Guo Ping,Huang，Yi,et al. Optimal Cooperative Secondary Control for Islanded DC Microgrids via a Fully Actuated Approach[J]. IEEE/CAA Journal of Automatica Sinica,2024,11(2):405-417.

Yu，Yi,Liu，Guo Ping,Huang，Yi,&Shi，Peng.(2024).Optimal Cooperative Secondary Control for Islanded DC Microgrids via a Fully Actuated Approach.IEEE/CAA Journal of Automatica Sinica,11(2),405-417.

Yu，Yi,et al."Optimal Cooperative Secondary Control for Islanded DC Microgrids via a Fully Actuated Approach".IEEE/CAA Journal of Automatica Sinica 11.2(2024):405-417.