The application of virtual synchronous generator algorithm in current droop control is studied for the excellent characteristics of control strategy of virtual synchronous generator. Current droop control method is used to replace the control strategy of the active power/frequency adjustment and reactive power/voltage regulation based on the mathematical model of virtual synchronous generator, reserving the inertia and damping characteristics of the mechanical rotation of the synchronous generator and discarding its stator electrical model, so that the inverter not only has the superior performance of the current droop control, but also owns damping and inertial characteristics of the synchronous generator, and increasing the stability of grid frequency and voltage amplitude. The grid-connected inverter's robustness is enhanced by introducing virtual impedance in voltage/current closed-loop controller. Simulation results verify the feasibility and effectiveness of the proposed control strategy. This work is supported by National Natural Science Foundation of China (No. 11472058).