Distributed current edge-control strategy based on cyber-energy dual modulations with quantized state for DC microgrids

Although the cyber-energy dual modulation (CEDM) has been applied to DC microgrids to achieve information exchange without additional communication lines, the communication bandwidth based on CEDM is very low. In this case, the traditional distributed collaborative control based on high communication bandwidth is not suitable. Thus, this paper proposes a distributed current edge-control strategy that fuses quantized state information with CEDM and combines dynamic event-triggered control with H_∞ consensus. A quantized CEDM protocol enables low-bandwidth communication while reducing communication costs. Simulations show output consensus under varied droop gains and external disturbances, with a maximum observed output error of 1.568×10^-2. The event-triggered mechanism lowers communication burden, yielding average triggering intervals ranging from 10^-2 to 10^-1 seconds.