As the main equipment for the photovoltaic grid-connected power generation system to interface with the power grid, the control technology of the inverter has become a hot topic of research. This paper briefly introduces the structure and working principle of the photovoltaic grid-connected inverter system, and focuses on analyzing the control scheme design and digital implementation process of its grid-connected working condition. Finally, a 1 kW experimental prototype was made using the TMS320LF2407A digital signal processor (DSP) as the controller. The simulation and experimental results show that the design scheme achieves good and real-time tracking of the output current to the grid voltage.
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