In recent years, renewable energy sources have greatly affected the structure and operation of power systems. Previously, gridconnected PVgenerators using inverters were only allowed to generate active power to ensure the utilities to adjust the voltage in the distribution grid. It is no longer optimal for system power transmission and system stability, especially when solar power sources with a capacity of hundreds of MWs having a role in regulating grid voltage. Accordingly, this paper proposes a smart inverter model of a gridconnected PV system that can regulate the reactive power. We use PSCAD software to simulate and analyze the gridconnected solar PV system. Simulation results show the feasibility of this control model