Simulation Analysis of MPPT Algorithm for a PV System Using a ZSI and Contrast with DC-DC Boosted VSI

Abstract

Energy demand is increasing from past few decades and Renewable energy resources are used for supplying that increasing power demand. So in order to increase the efficiency and power output of PV system MPPT Technique plays a major role. As PV arrays undergoes nonlinear and voltage-current characteristics thus MPPT Algorithm is necessary. Therefore it is necessary to operate the solar panel at its maximum power point tracking to ensure increase in the extraction of power from solar panel. Hence MPPT algorithm is necessary in PV array to maximize its output power. In this Paper a new Converter model named as Impedance(Z) Source Inverter with advanced MPC technique is used for MPPT for Grid connected PV harvesting system. A Single Stage Conversion has been carried out in ZSI for MPPT whereas in Conventional converters like VSI and CSI carries out. The Output of ZSI for PV system is compared with voltage Boosted converter and thus observed that dynamic stability of the system increases, THD reduces, power factor improves and efficiency increases by using ZSI for PV system. Simulation and experimental studies verify the performance of a new proposed control strategy.