A novel VDM control of energy storage converter based on adaptive parameters

Abstract

In order to suppress the influence of power fluctuation i n DC micro grid system, virtual DC motor ( control is applied to DC converter for improv in g the stability of the system. However, t he traditional virtual DC motor control with fixed parameters cannot take the dynamic response of the system into account. This paper analyzes the principle of virtual DC motor control and builds a small signal mode l . After that, the influence of virtual torque and damping coefficient on the dynamic response of DC bus voltage under power fluctuation is analyzed. On this basis, the virtual DC motor control strategy based on adaptive parameter is proposed, and the adap tive adjustment scheme of virtual torque and damping coefficient is designed. Finally, the feasibility and superiority of the proposed strategy are verified by c omparative simulation under different operating conditions.