Abstract
Several studies on PV solar cells are found in the literature which use static models. Those models are mainly one-diode, two-diode or three-diode models. In the dynamic modelling, a variable parallel capacitance is incorporated. Unlike the previous studies which do not clearly establish a relationship between the capacitance and the voltage, in the present paper, the link between the capacitance and the voltage is investigated and established. In dynamic modelling investigated in this paper, the dynamic resistance is introduced in the modelling of the solar cell. It is introduced in the current-voltage characteristic. The value of the dynamic resistance is evaluated at the maximum power point and its effect on the maximum power is investigated. The study shows for the first time, that the dynamic resistance must be introduced in the current-voltage characteristic, because it has an influence on the PV cell output.
Highlights
The world is facing an energy crisis due to the growing energy demand and the environmental damages linked to fossil fuel energy sources
In dynamic modelling investigated in this paper, the dynamic resistance is introduced in the modelling of the solar cell
The study shows for the first time, that the dynamic resistance must be introduced in the current-voltage characteristic, because it has an influence on the PV cell output
Summary
The world is facing an energy crisis due to the growing energy demand and the environmental damages linked to fossil fuel energy sources. In [10], the effect of capacitance on the output characteristics of solar cells is discussed. In [11], the dynamic model includes a parallel capacitance as well as Rsh and Rs. The bases of the Impedance Spectroscopy (IS) are explained and applied to detect the Potential-Induced Degradation (PID) of c-Si PV panels. Some work has been made to study the effect of solar array capacitance on the performance of switching shunt voltage regulator [13]. The previous studies do not clearly establish a relationship between the capacitance and the voltage; in those previous dynamic modellings, where the capacitance effect is investigated, the dynamic resistance is not included in the I - V characteristic. The value of Rd is evaluated at the maximum power point in order to know whether it has an effect or not on the maximum output power of the PV cell
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