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Research Papers

Accurate Method for Loss Parameter Extraction of Solar Panels

[+] Author and Article Information
M. Bencherif

Laboratory of Renewable Energies and Materials,
Physics Department,
University Abou Bekr Belkaid,
Tlemcen 13000, Algeria

B. N. Brahmi

Theoretical Physics Laboratory,
Physics Department,
University of Tlemcen,
Tlemcen 13000, Algeria

Contributed by the Solar Energy Division of ASME for publication in the JOURNAL OF SOLAR ENERGY ENGINEERING: INCLUDING WIND ENERGY AND BUILDING ENERGY CONSERVATION. Manuscript received July 20, 2017; final manuscript received November 13, 2017; published online January 22, 2018. Assoc. Editor: Gerardo Diaz.

J. Sol. Energy Eng 140(2), 021007 (Jan 22, 2018) (14 pages) Paper No: SOL-17-1301; doi: 10.1115/1.4038620 History: Received July 20, 2017; Revised November 13, 2017

This work describes a new simple and effective method to extract the loss parameters of solar panels (solar cells) and able to accurately represent their electrical behavior. This approach allows the extraction of the parameters of the single diode model using only the information provided by the manufacturer's data sheet. The proposed method presents a computational procedure of low complexity, which makes it possible to estimate the five parameters of any photovoltaic generator. Using the complete equation of the single diode model, the number of parameters to be calculated is reduced only to two parameters by an equation exclusively connecting the series resistance and the diode current. Suitable validations on important case studies are presented; an experimental data from multicrystalline MSX120 and thin film NA-F135 solar panels were used to test the single diode model with the extracted parameters. The experimental data are first collected at the same temperature at two different irradiances levels and at low irradiance level at a fixed temperature for MSX120. In the second stage, variations in temperature are considered at different irradiance level for NA-F135. The extraction results show that the I–V curves accurately fit the entire range of the experimental data. In addition, the results of the proposed procedure are compared to the most recent proposed techniques in literature. Furthermore, the results obtained show a highly accurate; in particular, at maximum power point (MPP), the error is always less than 0.005%, which is quite far of the authorized error of 1%.

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Figures

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Fig. 1

Equivalent circuit of single diode model

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Fig. 2

Solar panel configuration

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Fig. 3

Flowchart for extraction Rs and X

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Fig. 4

Example of graphical solution

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Fig. 5

Newton–Raphson method

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Fig. 6

Experimental (triangle) and simulated (black line) IV curves for MSX120 and NA-F135 in the test conditions

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Fig. 7

Experimental (x) and simulated (black line and circle) IV curve (a) and IV curve (b) modeled by the proposed and the Ref. [1] for PWP-201

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Fig. 8

Comparison between simulated IV curves in experimental conditions for the modules A-120 and I-110

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Fig. 9

IV curve of the polycrystalline panel STP-120 modeled by the proposed method and the referenced

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Fig. 10

IV curves of A-120 and I I-110 modeled by the proposed method and the referenced at STC

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Fig. 11

IV curves of STP-280 modeled by the proposed method and the data of Refs. [1] and [26] at STC

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Fig. 12

IV curves of five different models of solar panels modeled by the proposed method and referenced methods

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Fig. 13

IV curves of solar panels AP165 and SM55 modeled by the proposed method and referenced methods

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