Performance analysis of PV fed multistage converter with SMC controlled VSI

The trend of growing penetration of renewable energy resources in power systems has become pertinent in wake of fast depleting fuel and rising carbon emission. It has, therefore, become relevant to study the dynamics of their integration with the available technologies. Of all renewable resources, Photovoltaic generation is the most prevalent resource in India. Keeping this in mind, a multistage cascaded converter system is developed in this paper. The proposed technique comprises of a PV (Photo voltaic) fed MPPT (Maximum Power Point Tracking) controlled boost converter in cascade with a sliding mode controlled inverter. The paper aims at extracting maximum power from a PV source and converting it to a good quality ac power. The effect of variable output of PV generation due to varying solar irradiation has also been taken into consideration to establish the effectiveness of MPPT controlled boost converter. The performance of the sliding mode controlled voltage source inverter, when compared with a PI controlled voltage source inverter, is found to be superior in terms of the quality of the ac power.