Abstract

On the basis of analyzing the principle of photovoltaic(PV) generation and mathematical model of PC cells, the modeling and PSCAD-based simulation of large-scale PV generation station composed of several PV arrays are performed. Using both constant voltage tracking method and the measurement-based table data, the maximum power point tracking(MPPT) of large-scale PV array is implemented, and corresponding control strategy for grid-connected inverters is drafted. Finally, both normal operation of large-scale PV generation station and three-phase short-circuit fault occurred inside/outside the PV station are simulated and analyzed.

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