^{1}

^{2}

^{2}

^{3}

^{2}

^{1}

^{2}

^{3}

The performance of monocrystalline silicon cells depends widely on the parameters like the series and shunt resistances, the diode reverse saturation current, and the ideality factor. Many authors consider these parameters as constant while others determine their values based on the

The world energetic consumption is still dominated by the use of nonconventional sources like fossil sources, natural gases, and nuclear sources. The main drawback of the use of these sources is that they are exhaustible and they contribute to the pollution of the environment. Hence, it is useful to use renewable energy sources such as biomass, wind energy, hydroelectricity, and solar energy. Solar energy occupies an important place because it is available everywhere. Photovoltaic energy which is based on the conversion of direct sunlight into electricity is the most promising one. There are different technologies of photovoltaic (PV) cells which are found on the market: monocrystalline silicon (efficiency of

However, the performance of a photovoltaic cell is influenced by the climatic and meteorological conditions such as the irradiance and the temperature. It is known in the literature that when the irradiance decreases, the current also decreases and consequently, the output power decreases. When the temperature increases, the voltage decreases and the output power also decreases [

In order to verify the effectiveness of these results, the PV module has been modeled with MATLAB/SIMULINK. The input parameters for the simulations are the recorded irradiance and surface temperature, the determined PV parameters (

This paper is divided into the following sections: the first section presents research method including the modeling of a photovoltaic cell, the experiment, and the extraction algorithm of PV module parameters and the second section presents the results and analysis.

Two electrical models are used for modeling a photovoltaic cell:

A two-diode model (TDM) with the second diode which represents the recombination phenomenon in the bulk cell. However, this model is generally used for a polycrystalline silicon cell [

A one diode model (ODM) which is simple and represents precisely the operation of a monocrystalline solar cell [

One diode (ODM) of a photovoltaic cell.

By applying this function to (

^{2});

^{2} is the reference irradiance.

For a photovoltaic array constituted of

Figure

a photovoltaic module with characteristics shown in Table

a constant resistive load with a resistance equal to 7.5 Ω,

one current and one voltage sensors (ALMEMO module for DC voltage and current measurement: ZA 9900 AB and ZA 9901 AB, 1 kHz, 12 bits, 0.1 s, and maximum cycle: 14 hrs),

a pyranometer (first class, 285–2800 nm, 5–20 ^{2}, 20–200 Ω, 0–30 mV, and max 2000 W/m^{2}) for measuring the irradiance,

a temperature sensor (CTN FNA611, −10 to +90°C, 20 s) for measuring the PV module’s surface temperature,

a data acquisition unit ALMEMO with five inputs.

Manufacture’s specifications of Solar H750 Helios Module.

Band gap energy of silicon at 300 K | 1.12 eV |

Ideality factor of the |
1.2 |

Short circuit current at STC | 4.01 A |

Open circuit voltage at STC | 21.6 V |

Current at MPP | 3.47 A |

Voltage at MPP | 17.3 V |

Maximum power at STC | 60 Wp |

Number of series-connected cells | 36 |

Schematic of the experimental installation.

The theoretical current

Flow chart for the determination of the parameters of a photovoltaic module.

This section presents the recorded meteorological conditions (irradiance and temperature) and the load current. Then, extracted parameters of the PV module are presented with the subsequent discussion. And finally, the extracted parameters were used for the validation of the PV module’s modeling using MATLAB/SIMULINK.

The measured parameters are the irradiance, the module’s surface temperature, the current through the load, and the voltage at its input. The values were recorded on 23 January 2014 from 9:30 AM to 4 PM, with a time cycle of 30 s. The irradiance and the temperature are shown in Figure

The irradiance and the module’s surface temperature recorded on 23 January 2014.

Figures

The variation of the current through the load with the irradiance.

The variation of the current through the load with the temperature.

Figures ^{2} and 25°C) were used to see the variation with the manufacturer’s values.

Variation of the ideality factor and the temperature.

Variation of the ideality factor and the irradiance.

Influence of the ideality factor on the

Figures

Variation of the diode reverse saturation current with temperature during a day.

Variation of the diode reverse saturation current with irradiance during a day.

Figure ^{−15} A/K^{3}, ^{−1}.

Variation of the diode reverse saturation current with temperature.

The parameter ^{−1}) is the reverse of the reference temperature, ^{−8} A, the diode reverse saturation current at the standard conditions (

Figure ^{2} and 25°C) were used to see the variation with the manufacturer’s values.

Influence of the diode reverse saturation current on the

Figures

Variation of the series resistance with irradiance during a day.

Variation of the series resistance with temperature during a day.

Figure ^{2}). The mathematical model can be expressed in function of the irradiance ^{2}, and

Variation of the series resistance with irradiance.

Figure ^{2} and 25°C) were used to see the variation with the manufacturer’s values.

Influence of the series resistance on the

Figure ^{2}), the extracted series resistance (in Ω), the extracted ideality factor, and the extracted diode reverse saturation current (in A). The output is the current through the resistive load. For the simulation with the literature parameters, the measured irradiance and temperature are used, but the series resistance is ^{−8} A [

SIMULINK model of the photovoltaic system.

Figure

Output currents: measured (

This paper presents a new method for extracting the different parameters of a monocrystalline silicon solar cell. Modeled by a one diode model with three parameters to be determined (the diode reverse saturation current, the series resistance, and the ideality factor of the

The authors declare that there is no conflict of interests regarding the publication of this paper.