Abstract
In order to solve the power decoupling problem of micro source, virtual impedance control is widely used in micro source. In this paper, the virtual impedance control is analysed in detail, and the equivalent circuit model of micro-source system using virtual impedance control is established. The effect of virtual impedance control on micro-source system is analysed from three aspects. The influence of virtual impedance on the output voltage of micro-source is analysed by calculating the output voltage of micro-source in synchronous rotating coordinate system. A small signal model of the system is established according to the droop control characteristics of the micro source, and the influence of the change of virtual impedance value on the stability of the system is analysed. Finally, the simulation model of micro-source system is established, and the analysis results of this paper are verified based on the simulation model.
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