Distributed frequency restoration and SoC balancing control for AC microgrids

This paper develops an improved distributed finite-time control algorithm for multiagent-based ac microgrids with battery energy storage systems (BESSs) utilizing a low-width communication network. The proposed can simultaneously coordinate BESSs to eliminate any deviation from the nominal frequency as well solving state of charge (SoC) balancing problem. stability is established using Lyapunov method and homogeneous approximation theory, which guarantees accelerated convergence within settling time that does not dependent on initial conditions. Based this, significantly reduce burdens, event-triggered mechanism designed also avoid Zeno behavior. Then sufficient conditions boundary are derived guarantee reliability whole systems. Practical local constraints imposed implement protocol, theoretical results applied test system consisting five DGs BESSs, verifies effectiveness strategy.