Abstract
Abstract This paper proposes a full detailed mathematical model of a dual-stage, three-phase, gridconnected photovoltaic (PV) system. In this work, the system structure and the modeling techniques of each part of the PV system have been discussed, based on the MATLAB/Simulink software environment, including the PV array, the power-electronic converters (the DC-DC boost converter and the threelevel voltage source converter (3L-VSC)), and the utility interface (the low-pass filter and the coupling transformer). These are followed by introduction of the control schemes (the maximum power point tracking (MPPT) and 3L-VSC control schemes), principles of operation, and modeling steps for gridconnected PV system. A comprehensive set of simulation cases have been conducted to demonstrated the effectiveness of the mathematical model of the PV system. This work can assist power engineers in developing circuit-based simulation models for impact assessment studies, analysis, and identification of potential issues with respect to the grid integration of PV systems.
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