Simulation and Mathematical Modelling for Grid-connected Photovoltaic Power System Based on ADPSS

SUMMARY The three-phase grid-connected photovoltaic power system includes MPPT and currentcontrolled voltage source inverter. The photovoltaic arrays maximum power point tracking is realized applying the former boost circuit. A mathematical model for photovoltaic power system based on the three-phase grid-connected photovoltaic power system is developed. The mathematical model for photovoltaic power system is developed applying Matlab which includes photovoltaic array, Maximum Power Point Tracking (MPPT), DC/DC and the inverter system applying voltage and current loop control. The simulation results show that the mathematical model can reflect characteristics and functions of the actual photovoltaic power system precisely. And it can be used in the simulation on grid-connected photovoltaic power system. After the precise mathematical model is established, the UD (user defined) model of grid-connected photovoltaic power system is established based on PSASP. A effective tool is given for studying the interrelationship between PV system and power grid . And it can also confirm the capacity of grid-connected PV power system. The ability of photovoltaic power sytem connected with grid is improved. And the ability to run stably is improved also after the photovoltaic power sytem is connected with grid. It adapt to the requirement of vigorous development solar energy. It plays an active role to speed up the construction of smart grid.