scholarly journals THREE-DIODE MODEL AND SIMULATION OF PHOTOVOLTAIC (PV) CELLS

2019 ◽  
pp. 108-116
Keyword(s):  
Cell Model ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Photovoltaic Cell ◽  
Open Circuit ◽  
Cell Parameters ◽  
Model And Simulation ◽  
Pv Cell ◽  
Mathematical Equations ◽  
Model Equations

Existing empirical solar cell models use one or two diodes. As the number of diodes in a model increases, the mathematical complexity in deriving model equations also increases. In this paper, a photovoltaic cell is modeled using three diodes. Non-linear mathematical equations governing the I-V and P-V characteristics are summarized and simulated using Matlab looping iterative method. All simulations were performed in Matlab. Comparison is made between all models (one, two and three-diode) for design verification. Results obtained show that as the number of diodes increases in a PV cell model, the open circuit voltage and maximum power decreases for a given set of PV cell parameters. The short circuit current remained at a fixed value irrespective of the number of diodes.

scholarly journals Solar Photovoltaic Cell Parameters Extraction Using Differential Evolution Algorithm

Proceedings ◽  
2020 ◽  
Vol 63 (1) ◽  
pp. 43
Author(s):  
Rachid Herbazi ◽  
Youssef Kharchouf ◽  
Khalid Amechnoue ◽  
Ahmed Khouya ◽  
Adil Chahboun
Keyword(s):  
Solar Cells ◽  
Differential Evolution ◽  
Short Circuit ◽  
Differential Evolution Algorithm ◽  
Short Circuit Current ◽  
Photovoltaic Cell ◽  
Open Circuit ◽  
Good Precision ◽  
Cell Parameters ◽  
Power Point

This work presents a method for extracting parameters from photovoltaic (PV) solar cells, based on the three critical points of the current-voltage (I-V) characteristic, i.e., the short-circuit current, the open circuit voltage and the maximum power point (MPP). The method is developed in the Python programming language using differential evolution (DE) and a three-point curve fitting approach. It shows a good precision with root mean square error (RMSE), for different solar cells, lower than to those cited in the literature. In addition, the method is tested based on the measurements of a solar cell in the Faculty of Science and Technology of Tangier (FSTT) laboratory, thus giving a good agreement between the measured data and those calculated (i.e., RMSE = 7.26 × 10−4) with fewer iterations for convergence.

scholarly journals Photovoltaic Cell and Module I-V Characteristic Approximation Using Bézier Curves

2018 ◽  
Author(s):  
Roland Szabo ◽  
Aurel Gontean
Keyword(s):  
Short Circuit ◽  
Short Circuit Current ◽  
Photovoltaic Cell ◽  
Open Circuit ◽  
Maximum Power ◽  
Shunt Resistance ◽  
First Case ◽  
Novel Approach ◽  
Pv Cell ◽  
Different Temperatures

The aim of this work is to introduce new ways to model the I-V characteristic of a PV cell or PV module using straight lines and Bézier curves. This is a complete novel approach, Bézier curves being previously used mainly for computer graphics. The I-V characteristic is divided in three sections, modeled with lines and a quadratic Bézier curve in the first case and with three cubic Bézier curves in the second case. The result proves to be accurate and relies on the fundamental points usually present in the PV cell datasheets: Voc (the open circuit voltage), Isc (the short circuit current), Vmp (the maximum power corresponding voltage) and Imp (the maximum power corresponding current) and the parasitic resistances Rsh0 (shunt resistance at Isc) and Rs0 (series resistance at Voc). The proposed algorithm completely defines all the implied control points and the error is analyzed. The proposed method is validated for different temperatures and irradiances. The model is finally compared and validated using the least squares fitting method.

scholarly journals Study of Temperature Coefficients for Parameters of Photovoltaic Cells

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Daniel Tudor Cotfas ◽  
Petru Adrian Cotfas ◽  
Octavian Mihai Machidon
Keyword(s):  
Short Circuit ◽  
Photovoltaic Cells ◽  
Short Circuit Current ◽  
Photovoltaic Cell ◽  
Open Circuit ◽  
Absolute Temperature ◽  
Coefficient Function ◽  
Cell Parameters ◽  
Temperature Coefficients ◽  
The Absolute

The temperature is one of the most important factors which affect the performance of the photovoltaic cells and panels along with the irradiance. The current voltage characteristics, I-V, are measured at different temperatures from 25°C to 87°C and at different illumination levels from 400 to 1000 W/m2, because there are locations where the upper limit of the photovoltaic cells working temperature exceeds 80°C. This study reports the influence of the temperature and the irradiance on the important parameters of four commercial photovoltaic cell types: monocrystalline silicon—mSi, polycrystalline silicon—pSi, amorphous silicon—aSi, and multijunction InGaP/InGaAs/Ge (Emcore). The absolute and normalized temperature coefficients are determined and compared with their values from the related literature. The variation of the absolute temperature coefficient function of the irradiance and its significance to accurately determine the important parameters of the photovoltaic cells are also presented. The analysis is made on different types of photovoltaics cells in order to understand the effects of technology on temperature coefficients. The comparison between the open-circuit voltage and short-circuit current was also performed, calculated using the temperature coefficients, determined, and measured, in various conditions. The measurements are realized using the SolarLab system, and the photovoltaic cell parameters are determined and compared using the LabVIEW software created for SolarLab system.

scholarly journals Photovoltaic Cell and Module I-V Characteristic Approximation Using Bézier Curves

2018 ◽  
Author(s):  
Roland Szabo ◽  
Aurel Gontean
Keyword(s):  
Short Circuit ◽  
Short Circuit Current ◽  
Photovoltaic Cell ◽  
Open Circuit ◽  
Maximum Power ◽  
Shunt Resistance ◽  
First Case ◽  
Novel Approach ◽  
Pv Cell ◽  
Straight Lines

The aim of this work is to introduce new ways to model the I-V characteristic of a PV cell or PV module using straight lines and Bézier curves. This is a complete novel approach, Bézier curves being previously used mainly for computer graphics. The I-V characteristic is divided in three sections, modeled with lines and a quadratic Bézier curve in the first case and with three cubic Bézier curves in the second case. The result proves to be accurate and relies on the fundamental points usually present in the PV cell datasheets: Voc (the open circuit voltage), Isc (the short circuit current), Vmp (the maximum power corresponding voltage) and Imp (the maximum power corresponding current) and the parasitic resistances Rsh0 (shunt resistance at Isc) and Rs0 (series resistance at Voc). The proposed algorithm completely defines all the implied control points and the error is analyzed. The temperature and irradiance influence is also analyzed. The model is also compared using the least squares fitting method. The final validation shows how to use Bézier cubic curves to accurately represent the I-V curves of an extensive range of PV cells and arrays.

scholarly journals RESISTANCE, TEMPERATURE AND IRRADIANCE PARAMETER ANALYSIS OF A SINGLE DIODE PHOTOVOLTAIC CELL MODEL

2019 ◽  
pp. 97-107
Keyword(s):  
Output Power ◽  
Series Resistance ◽  
Cell Model ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Photovoltaic Cell ◽  
Open Circuit ◽  
Parameter Analysis ◽  
Shunt Resistance ◽  
Parameter Variations

This paper presents an analysis of parameter variations of a single-diode solar cell model. The parameters analyzed are the series resistance, shunt resistance, temperature and radiation change. Model equations are derived and simulated. All simulations were performed in MatLab using looping iterative method. Results obtained show that an increase in series resistance causes a decrease in short-circuit current and output power. A decrease in shunt resistance also causes a decrease in short circuit current and output power. An increase in temperature above the nominal value of 25oC causes a significant decrease in the open circuit voltage. An increase in irradiance above a nominal value of 1000 W/m2 causes the short circuit current to increase from 8.21A at 1000 W/m2 to 10.67A at 1300W/m2. It can be seen that parameter variations have a net effect on the current-voltage (I-V) and power-voltage (P – V) characteristics.

Inexpensive Cu2SnS3 grown by room-temperature aqueous bath electrodeposition for thin film solar cells

2018 ◽  
Vol 32 (19) ◽  
pp. 1840071
Author(s):  
Biren Patel ◽  
Indrajit Mukhopadhyay ◽  
Abhijit Ray
Keyword(s):  
Room Temperature ◽  
Low Cost ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Photovoltaic Cell ◽  
Deposition Potential ◽  
Open Circuit ◽  
Optical Data ◽  
Back Contact ◽  
Cell Parameters

We report the growth of Cu2SnS3 (CTS) thin films on F-doped SnO2 (FTO) glass substrates at room-temperature by low-cost electrodeposition technique using an aqueous medium without the evolution of hydrogen. Electrolyte concentration and deposition potential were optimized under the limits of water hydrolysis. As-deposited films are post-annealed in the presence of the sulphur flakes to establish the stoichiometry. The annealed films were found to contain high phase purity and favorable optical properties to be useful for the photovoltaic applications. Optical data reveal that the CTS films have direct optical bandgap of 1.25 eV with an absorption coefficient of the order of 104 cm[Formula: see text]. A photovoltaic cell architecture of Glass/FTO (back contact)/CTS/CdS/Al:ZnO/Al (front contact) exhibited an open circuit voltage of 28 mV, a short circuit current density of 8.4 [Formula: see text]A/cm2 and the fill factor of 25%. The absorber thickness optimization and the use of Mo-coated glass as a back contact improve the solar cell parameters. A further study in this aspect is under way.

Study of Photoelectrochemical Solar Cell Using WSe2 Crystal

2013 ◽  
Vol 665 ◽  
pp. 330-335 ◽  
Author(s):  
Ripal Parmar ◽  
Dipak Sahay ◽  
R.J. Pathak ◽  
R.K. Shah
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Fill Factor ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Electrical Energy ◽  
Open Circuit ◽  
Cell Parameters ◽  
Photoelectrochemical Solar Cell ◽  
Photoelectrochemical Solar Cells

The solar cells have been used as most promising device to convert light energy into electrical energy. In this paper authors have attempted to fabricate Photoelectrochemical solar cell with semiconductor electrode using TMDCs. The Photoelectrochemical solar cells are the solar cells which convert the solar energy into electrical energy. The photoelectrochemical cells are clean and inexhaustible sources of energy. The photoelectrochemical solar cells are fabricated using WSe2crystal and electrolyte solution of 0.025M I2, 0.5M NaI, 0.5M Na2SO4. Here the WSe2crystals were grown by direct vapour transport technique. In our investigations the solar cell parameters like short circuit current (Isc) and Open circuit voltage (Voc) were measured and from that Fill factor (F.F.) and photoconversion efficiency (η) are investigated. The results obtained shows that the value of efficiency and fill factor of solar cell varies with the illumination intensities.

scholarly journals Understanding Photovoltaic Cell Dynamic Resistance Behavior with Changing Incident Light Intensity - draftv1.pdf

2019 ◽  
Author(s):  
FRANCISCO J. GARCIA-SANCHEZ
Keyword(s):  
Equivalent Circuit ◽  
Cell Model ◽  
Short Circuit ◽  
Incident Light ◽  
Photovoltaic Cell ◽  
Open Circuit ◽  
Photovoltaic Device ◽  
Dynamic Resistance ◽  
Analytic Expressions ◽  
Static Conditions

A theoretical examination of the general behavior that should be expected to be displayed by the magnitude of the dynamic resistance of a conventional illuminated photovoltaic device within the power-generating quadrant of its <i>I-V</i> characteristics, when measured in quasi-static conditions from the short-circuit point to the open-circuit point, at various incident illumination intensities. The analysis is based on assuming that the photovoltaic device in question may be adequately described by a simple conventional d-c lumped-element single-diode equivalent circuit solar cell model, which includes significant constant series and shunt resistive losses, but lacks any other secondary effects. Using explicit analytic expressions for the dynamic resistance, we elucidate how its magnitude changes as a function of the terminal variables, the incident illumination intensity and the model’s equivalent circuit elements’ parameters.

Study on the Small Molecule Organic Solar Cells with Anode Buffer Layer

2012 ◽  
Vol 550-553 ◽  
pp. 476-479
Author(s):  
Ai Fen Wang
Keyword(s):  
Buffer Layer ◽  
Active Layer ◽  
Organic Solar Cells ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Photovoltaic Cell ◽  
Open Circuit ◽  
Experimental Result ◽  
Anode Buffer Layer ◽  
Buffer Material

The three photovoltaic cells with two different anode buffer layer on the basis of Pentacene/C60 as active layer was fabicated, the effect and mechanism of anode buffer layer on performance of organic photovoltaic cell are explored. The experimental result shows transition metal oxide inserted between organic active layer and ITO could increase short circuit current and open-circuit voltage,power conversion efficiency is increased to 107%,so it is effective anode buffer material.

scholarly journals Measurement Uncertainty Propagation through Basic Photovoltaic Cell Models

Energies ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 1029 ◽  
Author(s):  
Ivan Tolić ◽  
Mario Primorac ◽  
Kruno Miličević
Keyword(s):  
Measurement Uncertainty ◽  
Fill Factor ◽  
Short Circuit ◽  
Renewable Energy Sources ◽  
Uncertainty Propagation ◽  
Short Circuit Current ◽  
Photovoltaic Cell ◽  
Open Circuit ◽  
Cell Models ◽  
Global Irradiance

This paper presents measurement uncertainty propagation through four basic photovoltaic cell models: One-diode model without resistances, with one resistance and with two resistances and two-diode model with two resistances. The expressions for the output current of all photovoltaic cell models is presented as a function of global irradiance G and temperature T. Next, the expressions for all fill factor parameters: short-circuit current, open-circuit voltage, current and voltage at the maximum power point, depending on the global irradiance G and temperature T are derived as well. For each parameter, Monte Carlo simulations to calculate the measurement uncertainty of the parameter are performed and the results were used as input values for the calculation of measurement uncertainty of fill factor. Practical calculations are performed in laboratory for renewable energy sources located on 45°32′ N and 18°44′ E. Final fill factor calculations are compared for three different module technologies.

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