The Design and Implementation of PV Inverter for Grid-Connected System Base on SVPWM

Abstract

A PV inverter Grid-Connected system based on SVPWM is designed here, which is consisted of DC/DC circuit, TMS320F2812 , optical isolating circuit and driver circuit, three-phase inverter bridge, Grid signal acquisition circuit. Besides,program of the system is built with CCS3.3. SVPWM, MPPT, Grid-Connected, control comes true with the help of C language. Improved variable step size perturbation and observation method is applied in MPPT, which saves time of searching maximum power point and avoids oscillation generated. The experimental results show that the system can not only meet the design requirements, the Grid-Connect effect is also ideal.