Lyapunov Compatibility-Based Adaptive Consensus Algorithm in PV-BESS Integrated Island DC Microgrids: A Dynamic State of Charge Balancing

This paper proposes a novel State-of-Charge (SoC)- based power allocation strategy for photovoltaic (PV)-based DC microgrids, leveraging an adaptive consensus algorithm to ensure SoC balance across Battery Energy Storage System (BESS) nodes. The primary control scheme employs inner-loop current droop control to mitigate disturbances arising from PV operation. The SoC-based power allocation strategy serves as a secondary control mechanism, designed to maintain a uniform SoC level across all BESS nodes via the adaptive consensus algorithm. This algorithm is compatible with a range of secondary control types, thereby mitigating battery degradation. Specifically, the stability and compatibility of the SoC-based power allocation strategy are rigorously proven by constructing a Lyapunov function. The proposed control strategy is simulated in MATLAB/SIMULINK and in an OPAL-RT-based real-time simulation environment to demonstrate its effectiveness, in which the proposed adaptive consensus algorithm can accommodate two different secondary control strategies.

IEEE Transactions on Sustainable Energy

IEEE Transactions on Sustainable Energy

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1949-3037

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