Incorporation of the VSISsystemSbased on LCL filter,Simproved on theStheoretical basis of repetitive control,Swith aSfrequency adaptive controlSstrategySability,Sto ensure that when the grid frequencySfluctuationsSstill has a goodScurrent tracking performance.SAnd the system has theSadvantagesSof lowSharmonic andShigh power factor.SAnd the correctnessSand effectiveness of the proposed control strategySis verified bySmatlab/simulink simulation.