A Distributed SOC Balance Control Strategy in the DC Microgrid Based on the Virtual DC Machine Control

The virtual DC motor (VDCM) control strategy can simulate the dynamic response of DC motors, enhance system stability and controllability, and has received widespread attention. However, a key challenge in the efficient operation of DC microgrids is the state of charge (SOC) balance of energy storage units, which is crucial for improving the utilization efficiency of energy storage units. This paper introduces an innovative control method that uses VDCM as the basic control layer and combines dynamic consensus algorithm to design SOC balance controller. The proposed method not only maintains the stability of the DC bus voltage, but also achieves SOC consistency among multiple energy storage units. This article validated the effectiveness of the control strategy through a simulation platform built using Matlab/Simulink. The results indicate that the controller can optimize the output of energy storage units, thereby improving the overall efficiency and lifespan of DC microgrid systems.