Abstract

An enhanced two diode photovoltaic (PV) model is proposed to estimate accurately the current-voltage (I-V) characteristic curves of the PV modules. In the proposed method, only four parameters of the two diode PV model are needed to calculate from seven parameters with reasonable computational effort. In this paper, a new expression is developed to find the value of reverse saturation current (Isat) using two diode PV model's I-V characteristic curve equation considering the effects of temperature and irradiation on the value of shunt and series resistances. A Numerical technique is used to determine the value of output current, series and shunt resistance of the proposed PV model. For validating the proposed PV model, five different PV modules are tested at various weather conditions. The proposed PV model is simple and accurate and it is useful to design the suitable MPPT converter.

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