Abstract:An improved repetitive control scheme in single-phase inverter is adopted，namely connecting the dead beat controller after repetitive controller in the forward channel of the inner voltagering，and using digital control algorithm in the DSP platform to achieve the control scheme．When the system is in stable operation condition，repetitive control is used to resist periodic disturbance and thus improve the steady-state performance．Contrarily，the deadbeat controller can feel mutationof input error and produce accommodation immediately to ensure the systems fast responsespeed．Experiment results provethat the proposed scheme can achieve good dynamic and steady-stateperformance．