An Effective Method to Accurately Extract the Parameters of Single Diode Model of Solar Cells

Abstract

A non-iterative method is presented to accurately extract the five parameters of single diode model of solar cells in this paper. This method overcomes the problems of complexity and accuracy by simplifying the calculation process. Key parts of the equation are to be adjusted dynamically so that the desired five parameters can be obtained from the I–V curve. Then, the I-V and P-V characteristic curves of solar cells are used to compare the effectiveness of this method with other methods. Furthermore, the root mean square error analysis shows that this method is more applicable than other methods. Finally, the I-V and P-V characteristics simulated by using the extracted parameters in this method are compared and discussed with the experimental data of solar cells under different conditions. In fact, this extraction process can be regarded as an effective and accurate method to estimate solar cells’ single diode model parameters.

Modelling the effect of defects and cracks in solar cells’ performance using the d1MxP discrete model

“…Applying Kirchhoff’s laws, the output current I , as a function of the output voltage V is given by Eq. ( 1 ), being the photogenerated current, the diode’s current, the diode reverse current (also known as inverse saturation current or dark current), n the diode non-ideality factor, the series resistance associated to a voltage loss due to the cell’s connections and the shunt/parallel resistance related to a current loss due to the current leaks on the cell 1 – 3 , 7 , 8 . The 1M5P model is characterised by five parameters ( , , , n and ), being obtained through equations already presented in the literature 1 , 8 .…”

“…( 1 ), being the photogenerated current, the diode’s current, the diode reverse current (also known as inverse saturation current or dark current), n the diode non-ideality factor, the series resistance associated to a voltage loss due to the cell’s connections and the shunt/parallel resistance related to a current loss due to the current leaks on the cell 1 – 3 , 7 , 8 . The 1M5P model is characterised by five parameters ( , , , n and ), being obtained through equations already presented in the literature 1 , 8 . Each of them is obtained through a restricted range of points, which translates into a disadvantage of this model, given that the ability to portray the behaviour of photovoltaic devices ends up being affected.…”

Experimental Investigation and Modelling of Sediments Effect on the Performance of Cadmium Telluride Photovoltaic Panels

“…To obtain the unknown parameters of the 1M5P model of a solar panel, the noniterative method of Zhaoxu Song was used [37], which admits the possibility of obtaining these parameters based on characteristics of the I-V and P-V curves. According to Zhaoxu Song [37], in the I-V characteristic curve there are three important points: the short circuit point, the open circuit point, and the point of maximum power.…”

Solar Cell Parameter Extraction Method from Illumination and Dark I-V Characteristics

“…There are mainly three types of parameter extraction methods: explicit, iterative and based on optimization [17,18]. The explicit (or analytical) methods are fast, as they use simplifications and empirical observations in order to obtain a set of equations that describes the cell behavior and can be solved without an iteration process [18][19][20][21]. However, the approximations made, which sometimes include neglecting the series and/or parallel resistances, or considering the saturation currents of both diodes in the DDM to be equal, lack accuracy and may lead to unrealistic solutions [2,18,22].…”