Finite-Time Consensus-Based Collaborative Control Strategy for BESSs
Xiaoshan Wang, Yang Wu · 2025
This article proposes a collaborative control method for state-of-charge (SoC) balance, accurate current sharing, and voltage regulation in islanded DC microgrids using a finitetime consensus algorithm and hierarchical control structure. At the communication layer, a sparse distributed network enables communication among neighboring battery energy storage unit (BESU), with average information obtained via the finite-time consensus algorithm. At the primary control layer, a dynamically adjusted droop coefficient allows each BESU to achieve adaptive SoC balance. Two adjustment factors are introduced to enhance SoC balance speed and accuracy. At the secondary control layer, voltage compensation eliminate the effects of line resistance mismatched and restores DC bus voltage to rated value. A MATLAB/Simulink simulation model validates the effectiveness of the proposed approach.