The main control objectives of DC microgrid are to maintain the bus voltage stability and realize the proportional distribution of loads. In order to overcome the shortcomings of the centralized control of DC microgrid

a distributed coordinated control strategy is proposed. By using the hierarchical structure

the voltage secondary control and the operation control of the power generation cost are introduced into the control strategy based on the original droop control

and the power generation unit only exchanges information with the adjacent communication unit

thus the control objectives of the voltage stability and minimum generation cost are finally realized through the finite-time consensus algorithm. The proposed control strategy has both the advantages of hierarchical control and limited consistency control with high flexibility

robustness and good convergence. To verify the proposed control strategy

a corresponding DC microgrid model is built to simulate different scenarios such as power supply switching on and off

load fluctuation. Effectiveness of the proposed strategy is verified by numerical examples.