Consensus control for heterogeneous battery energy storage systems in AC microgrids without power measurements

Abstract

This paper proposes a distributed secondary control strategy for heterogeneous battery energy storage systems (BESSs) in islanded microgrids, without requiring power measurements. The method uses local State-of-Charge (SoC) information to achieve energy balancing and proportional active power sharing by introducing distributed filters. Frequency and voltage regulation are also accomplished using local frequency and voltage information. The system stability under the proposed control strategy is rigorously proved based on the Lyapunov function method. Simulation is performed in the MATLAB/Simulink platform to verify the effectiveness of the proposed control method.