Frequency Synchronization and SoC Balancing Control in AC Microgrids

This paper develops a distributed improved finite-time Control algorithm for multi-agent based ac microgrids with battery energy storage systems (BESSs) utilizing a low-width communication network. The proposed control algorithm can simultaneously coordinate BESSs to restore the frequency as well as solving state of charge (SoC) balancing problem. An accelerated convergence can be achieved within a settling time that is irrelevant to initial conditions. Then, the stability of the proposed control algorithm is established using Lyapunov method and homogeneous approximation theroy. Further, to significantly reduce the number of communication, an event-triggered mechanism that enable each agent to update its input is provided. It is proved that under the proposed event-triggered consensus control strategy. Finally, we apply the theoretical results to a test system in several case studies with MATLAB/SIMULINK. The results of the theoretical analysis and simulation verify the effectiveness of the proposed strategy.