For the bidirectional converter,the proportional integral control in the process of grid-connected energy feeding has problems such as stability error and system disturbance. Based on the traditional PI double closed-loop control strategy,a new double closed-loop composite control method is designed,which applies the quasi-proportional resonance control to the current inner loop control in the two-phase stationary coordinate system,and the voltage outer loop adopts PI. Control Strategy. Through MATLAB/Simulink simulation,the results show that the composite control strategy can achieve no static difference control,reduce the harmonic content of the bidirectional converter grid-connected current,and the system has good dynamic performance and robust performance.