| Title |
Dead time Compensation of Single-phase Grid-connected Inverter Using SOGI |
| Authors |
Ui-Seok Seong ; Jae-Suk Lee ; Seon-Hwan Hwang ; Jang-Mok Kim |
| DOI |
https://doi.org/10.6113/TKPE/2017.22.2.166 |
| Keywords |
Single-phase grid-connected inverter ; Dead time ; SOGI ; Current ripple reduction |
| Abstract |
This study proposes a compensation method for the dead-time effects on a single-phase grid-connected inverter. Dead time should be considered in the pulse-width modulation gating signals to prevent the simultaneous conduction of switching devices, considering that a switching device has a finite switching time. Consequently, the output current of the grid-connected inverter contains odd-numbered harmonics because of the dead time and the nonlinear characteristics of the switching devices. The effects of dead time on output voltage and current are analyzed in this study. A new compensation algorithm based on second-order generalized integrator is also proposed to reduce the dead-time effect. Simulation and experimental results validate the effectiveness of the proposed compensation algorithm. |