Grid-Connected Voltage Source Inverter with LCL Filter Implementation

This system implements a grid-connected voltage source inverter (VSI) with an LCL filter utilizing Space Vector Pulse Width Modulation (SVPWM) control technique, specifically designed for MATLAB 7.3 version compatibility. The voltage source inverter serves as a power electronic converter that transforms DC voltage into AC voltage through precise switching operations controlled by SVPWM algorithm. The LCL filter circuit effectively reduces harmonic content in the inverter output voltage by providing superior attenuation characteristics compared to simple L or LC filters. The SVPWM control technique optimizes voltage utilization and minimizes harmonic distortion by generating precise voltage vectors through mathematical transformation of three-phase coordinates. This inverter-filter combination model includes MATLAB implementation code featuring key functions such as Clarke/Park transformations, sector identification, and switching time calculations for SVPWM generation. The simulation environment allows comprehensive analysis of system performance including harmonic spectrum analysis, filter parameter optimization, and grid synchronization studies through MATLAB/Simulink blocks and script-based programming approaches compatible with version 7.3 architecture.