Enhanced Distributed Coordinated Control Strategy for DC Microgrid Hybrid Energy Storage Systems Using Adaptive Event Triggering

A novel enhanced distributed cooperative control framework, based on adaptive event-triggered mechanisms, is developed for managing multiple hybrid energy storage systems (HESSs) in islanded DC microgrids (MG). This system utilises a hierarchical coordinated control method (HCCM) with primary virtual-resistance droop control integrated with state-of-charge (SoC) management and secondary control for voltage regulation and proportional current distribution through optimised communication networks. The integration of Artificial Neural Network (ANN) based controllers alongside traditional PI control leads to an improvement in system responsiveness. The control approach dynamically adjusts the trigger parameters to minimise communication overhead with tight voltage regulation. An extensive simulation using MATLAB/Simulink shows how the system can effectively manage variability in renewable energy sources and maintain stable voltage profiles with precise power distribution and minimal bus voltage fluctuations.