The design of PV inverter for grid-connect system based on STM32 embedded

摘要

This paper proposed the embedded PV inverter Grid-Connect system, in order to reduce the distributed grid-connected photovoltaic controller cost and power consumption, which is consisted of TMS320F103, DC/DC circuit, dead-time delay, optical isolating circuit and driver circuit, three-phase inverter bridge, grid signal acquisition circuit. The dead time of the designed dead-band unit is adjustable, which can effectively prevent inverter subversion. The experimental results show that the system can't only meet the design requirements, the Grid-Connect effect is also ideal.