Development of fast simulation models for photovoltaic generation system based on Simulink

In this paper, a detailed mathematical presentation of Photovoltaic (PV) generation system, as well as its simulation model based on MATLAB / Simulink is established first. Its inverter-based simplified models, i.e. the switching-function equivalent model and average model, are simulated and compared quantitatively from different aspects. Simulation results reveal that the switching-function equivalent model, with high accuracy in representing steady-state and transient behaviors, is suitable for the Hardware-in-the-loop (HiL) applications. A novel phasor simulation model of PV system, which exploits the phasor presentation of three-phase power systems and thus significantly improves the simulation speed, is proposed. The validity and utility of the proposed phasor model are assessed by comparing the steady-state performance with the detailed model. Finally, it is shown how this model can be effectively used in the fast analysis of power flow and electromagnetic transient behavior of PV system.