The droop control provides an effective method for the regulation and control of DC microgrid power and voltage. Under the traditional droop control method

the line resistance parameters of each distributed power source are inconsistent in operation

leading to a reduction of accuracy of power distribution and

in case of severe cases

prpbably causing power overload. At the same time

the voltage drop of the line resistance will cause the DC bus voltage to drop

thereby reducing power supply quality. In view of above problems

the current-voltage adaptive droop algorithm of current-voltage is adopted in this paper so to achieve accurate distribution of power load. At the same time

the control method for reducing the DC bus voltage deviation is proposed. By analyzing the relationship among output power

current and voltage

the adaptive virtual impedance is introduced to adjust adaptively the sag coefficient so to eliminate the power deviation. As for the optimization of bus voltage

the method of translating voltage curve is adopted to compensate the voltage sag

reduce bus voltage deviation and improve power supply quality.Finally

the system simulation software is set up on Matlab/Simulink software and the effectiveness of the proposed strategy is verified by the simulation.