The PWM technique has been used to mitigate the harmonic distortion in grid-connected system, including Photo Voltaic (PV) inverters, wind and water turbines. Several control methods are present in which the main aim is to mitigate the harmonics and produce a good quality power. A simple modulation scheme is implemented for grid connected pv with single-phase inverter. A phase-shift modulation technique is implemented here, in order to obtained reduced current distortion even during the adverse conditions of grid. Hence proper filter action is to be implemented to reduce ripple. The key contribution of the proposed work is to design Phase Shift PWM scheme for single-phase application to mitigate the harmonics.