Compensation of dead time effects in grid-tied single-phase inverter using SOGI

This paper presents a compensation method of dead time effects in a grid-tied single-phase inverter. In general, output current of grid-tied inverter contains odd-numbered harmonics because of dead time and nonlinear characteristics of the switching devices. Thus, in this paper, effects of dead time in output voltage and current are analyzed in detail. Also, a new compensation algorithm using Second-order Generalized Integrator (SOGI) is proposed to reduce the dead time effect. Simulation and experimental results validate the effectiveness of proposed algorithm.