Performance Analysis of Improved Linear Sinusoidal Tracer Controlled Single-Stage and Dual-Stage Three-Phase Grid-Tied PV System

This paper compares single-stage and dual-stage Improved Linear Sinusoidal Tracer (ILST) based three-phase grid-tied photovoltaic (PV) systems. These systems facilitate the integration of solar energy into grid while improving the power quality of the distribution network. This design incorporates Maximum Power Point Tracking (MPPT), PV power injection into the grid, harmonic reduction at the Point of Common Coupling (PCC), and grid current balancing. Both single-stage and dual-stage configurations utilize a three-phase voltage source converter (VSC) controlled by an ILST algorithm. The single-stage and dual-stage systems are modeled and simulated using MATLAB. This ILST control algorithm of grid-tied PV system helps to maintain Total Harmonic Distortion (THD) of PCC voltages and grid currents within prescribed limits.