Improvement of the Accuracy of Photovoltaic Module Equivalent Circuit Model using Irradiance-dependent Variable Shunt Resistor

Accurate PV power generation forecast using numerical simulations have been getting more necessary in terms of the evaluation of its influence to power grid and the maintenance of PV power plant. We introduced irradiance-dependent shunt resistor to so-called single-diode equivalent circuit model to enhance the accuracy of the model. Using proposed model, calculation accuracy can be greatly improved compared to conventional equivalent circuit model of PV modules.