In this paper, the dynamic performance of a grid connected photovoltaic (PV) power system of a distribution networks is studied and experimental results are presented. Due to oscillating nature of the PV power plant, the grid integration requires stable and steady power injection with good power quality (PQ). Hence, the PQ analysis has been carried out under different climate conditions at 10 kW Solar Power Plant (SPP). This SPP can operate in grid connected or in isolated mode. The proposed PV power plant system is modelled and its performance is studied. This integrating model is composed of boost converter, maximum power point tracking (MPPT) control, inverter and filter design. It also explains the behaviour of system response whether it is stable and unstable condition. It is analyzed that the presence of high penetrated grid connected solar PV system will exhibit low PQ issues like voltage variations and harmonics. To study this effect a 10 kW SPP is developed for verifying the performance of the system.