Predefined-Time Observer-Based Fast Power Allocation for Battery Energy Storage Systems

This paper deals with the power allocation problem of battery energy storage systems (BESSs), in which battery units work cooperatively to not only meet the power demand of microgrid but also satisfy the constraint of state-of-charge (SoC). To this end, distributed power and state observers with predefined-time convergence are designed using the dynamic average consensus (DAC) mechanism. In contrast to the current findings, where the settling-time is difficult to ascertain, the settling-time can be provided in advance here. Then, observer-based power allocation strategy is further proposed, which enables BESSs to allocate the unbalanced power rapidly and balance SoC dynamically. Simulation results are given to confirm the effectiveness of the proposed strategy.