ABSTRACT
This paper presents a three phase DC-AC inverter for grid connected PV system using Third harmonic injection PWM (THIPWM) technique. The SPWM technique is easiest modulation scheme to understand but it requires complicated mathematical operation so third harmonic injection techniques for PWM (THIPWM) is employed to reduce the total harmonic distortion (THD) and to make the inverter suitable for grid connection, by synchronizing the inverter voltage with the grid voltage. The application of THIPWM to inverter increases for management of voltage and constancy in frequency of the system thereby increasing its overall efficiency.. MATLAB simulink model is developed to illustrate the proposed system. The inverter model complies with all IEEE 1547 standards varying a maximum of 5% under different testing conditions
