The application of consistency control in DC microgrid has become a hotspot of distributed coordinated control in recent years

but the impedance characteristic analysis of the whole network and the controlled microsource is seldom involved in the control process. Consequently

we proposed an impedance analysis method of AC/DC microsource hybrid DC microgrid which is suitable for discrete consistency control process. Moreover

we established an impedance model of AC/DC microsource hybrid DC microgrid with wind turbine

photovoltaic and energy storage

and studied the effects of key consistency parameters

such as boundary weight

communication delay and topology change

on the small signal stability of the system in the process of consistency control. The simulation results show that the impedance characteristic of the system will vary with the change of the boundary weight and the topology

which will affect the small signal stability of the whole system

while the limited communication delay has negligible effect on the small signal stability of the system.