Research on Stability Control Strategy of DC Microgrid Based on Consistency Algorithm

This paper researches voltage stability control strategy for DC microgrids containing wind and solar energy. A hybrid energy storage system (HESS) secondary control strategy based on a consistency algorithm is proposed to address the voltage fluctuation of DC microgrid buses. This control strategy fully utilizes the characteristics of HESS with high power and capacity and designs a voltage controller and power controller to achieve precise power allocation and tracking of bus voltage. Simulation shows that the proposed strategy can quickly compensate for the system’s lack of power when the source load power is unbalanced, maintain bus voltage stability, and balance the SOC of HESS.