Memory-Based Event-Triggered Control for Distributed Secondary Control in DC Microgrids With Quantized Communication

This article investigates the distributed secondary control of a dc microgrid, where the distributed generation units (DGUs) are connected through limited communication. In particular, the communication among the DGUs is restricted to transmitting quantized data at specific time instants, determined by a novel memory-based event-triggered mechanism (METM). Unlike existing memoryless event-triggered schemes, the proposed METM utilizes a series of the latest released signals to increase the probability of triggering samples at the peak or valley of the responses. Then, a memory-based secondary control is designed that fully utilizes the latest released dynamic information to achieve better control performance. The proposed method ensures accurate current sharing and voltage regulation, which is rigorously analyzed using the Lyapunov method. To validate the effectiveness of the theoretical results, numerical simulations and experimental work are conducted.