Grid Interfaced 3-phase Solar Inverter with MPPT by using Boost Converter

The paper proposes Grid interfaced 3-phase 750VA solar inverter with MPPT. In general the output of the PV array is unregulated DC supply due to change in weather conditions. The maximum power is tracked with respect to temperature and irradiance levels by using DC-DC converter. The perturbation and observation algorithm is applied for maximum power point tracking (MPPT) purpose. This algorithm is selected due to its ability to withstand against any parameter variation and having high efficiency. The output of Boost (DC-DC) converter is converted to AC voltage by using inverter. The AC output voltage and frequency are regulated. A closed loop voltage control for inverter is done by using sine wave pulse width modulation (SPWM). The regulated AC voltage is fed to AC standalone loads or grid integration. The overall system is designed and developed by using MATLAB/SIMULINK. The simulation results demonstrate the effective working of MPPT algorithm and voltage controller with SPWM technique for inverter in AC load applications.