A method for extracting solar cell parameters

A solar cell and parameter extraction technology, applied in the field of solar parameter calculation, can solve problems such as long calculation time, insufficient value accuracy, non-convergence, etc., and achieve the effects of convenient operation, accurate parameter extraction results, and reducing the influence of measurement errors.

Active Publication Date: 2022-06-07
CHANGAN UNIV
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Problems solved by technology

The former algorithm has high precision, but the calculation time is extremely long, and it is easy to cause non-convergence; the latter algorithm generally assumes that the parallel resistance Rsh is infinite to simplify the analysis
But in fact, the role of parallel resistance cannot be ignored, which will lead to the extracted series resistance Rs, ideality factor n and saturation current density J 0 Therefore, this paper proposes a parameter extraction method to enable solar cells to accurately extract series and parallel resistance, ideality factor and saturation current density from current curves under different light intensities through numerical and curve fitting techniques. Instead of assuming infinite parallel resistance

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  • A method for extracting solar cell parameters
  • A method for extracting solar cell parameters
  • A method for extracting solar cell parameters

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[0037] Below in conjunction with accompanying drawing, the present invention is further described:

[0038] see figure 1 and figure 2 , a method for extracting solar cell parameters, comprising the following steps:

[0039] Step 1: According to Kirchhoff's current law, the current-voltage characteristic equation of the ideal single-diode solar cell equivalent circuit is obtained, and the single-diode model of the solar cell is established:

[0040] Step 2: Use the J~V curve in the single diode model to obtain the parameters: open circuit voltage V oc , short circuit J sc and the parallel resistor R sh , to extract the unknown parameters: ideality factor n, reverse saturation current J 0 and series resistance R s .

[0041] In the first step, the current-voltage characteristic equation of the ideal single-diode solar cell equivalent circuit establishes a single-diode model:

[0042]

[0043] Among them: V is the real-time output voltage value of the solar cell, the ...

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Abstract

The invention provides an algorithm for extracting solar battery parameters. Its basic feature is that it includes the following steps: 1) Obtain the current-voltage characteristic equation of the equivalent circuit of an ideal single-diode solar cell according to Kirchhoff's current law, and establish a solar cell single-diode model; 2) Utilize J~ V curve obtains parameters (open circuit voltage V oc , short circuit J sc , parallel resistance R sh and m oc ) to extract unknown parameters (ideality factor n, reverse saturation current J 0 , series resistance R s ); 3) By measuring the J of the solar cell under different transmitted light sc , V oc and m oc The measured values ​​are plotted against the corresponding curve to determine the unknown parameter R s , n and J 0 value.

Description

technical field [0001] The invention belongs to the field of solar parameter calculation, in particular to a method for extracting solar cell parameters. Background technique [0002] Due to the increasingly serious environmental pollution and the increasing depletion of fossil fuels, the research on renewable energy has become the focus of attention of various countries. Solar energy has become an internationally recognized rational alternative energy source due to its abundant resources, clean and pollution-free advantages. The core of photovoltaic power generation system has become a research hotspot of scholars at home and abroad. Photovoltaic cells are the core of photovoltaic power generation systems. A suitable photovoltaic cell model is of great significance for the design and manufacture of photovoltaic testers, as well as for the evaluation of battery systems. [0003] The mainstream parameter extraction methods based on solar cell current curve generally includ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/373
CPCG06F30/36Y02B10/10
Inventor 徐小波李瑞雪
Owner CHANGAN UNIV
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