Distributed Generation Using Buck Converters Based on Consensus Control in DC Microgrid Integrations

Traditional centralized control relies heavily on the communication network, and therefore, a single subsystem communication failure could cause the entire microgrid down. Consensus control eliminates the need for the central controller, which is more cost-effective. In addition, because of distributed communication, the microgrid can continue to function correctly even if there are brief communication disruptions. The methodology proposed in this paper is based on consensus control and deployed with multi-agent systems. The entire system could supply the same stable output current according to the different levels of generation. To establish consensus control of the whole microgrid, information exchange in neighbor mechanisms has been designed separately for local control. In addition, the stability and robustness of the entire system will be assessed with load variations at a specific time. Each agent will adjust its duty cycle in real-time based on the information of neighbors, leading to a system-wide consensus. The proposed strategy is emerging as an attractive technology option to promote the use of DG and manage demand loads.