Development of single-phase photovoltaic grid-connected inverter based on DSP control

PV Grid-connected is the development trend of solar system application, and grid-connected inverter is one of the key components in PV grid-connected systems. Based on DSP TMS320F2812, a 10 kW single-phase grid-connected inverter has been built in this paper. DC-DC Boost chopper structure circuit and full bridge inverter circuit are used in the system, with the functions of Maximum Power Point Tracking and anti-islanding effects and a robust digital predictive current controller and etc. It has been shown from field results that: output current of the inverter with low harmonic content, good waveform quality, and effective anti-islanding are presented, which is great significance for the PV grid-connected system applications.