Realization of Interleaved PV Microinverter by Quadrature-Phase-Shift SPWM Control

抄録

In this study, a PV microinverter was implemented using an interleaved flyback converter (IFC) with sinusoidal PWM (SPWM) control. A double-frequency distortion due to the use of a sawtooth-based SPWM was found in the grid current. A forward compensation circuit that eliminates the distortion on the primary side was explored to simplify the output filter design. The maximum power transfer between the PV module, IFC, and grid end was modeled. An elaborate experiment was demonstrated to verify the analysis results and predicted performance.