Method for utilizing mathematic dominant model to solve solar cell physical parameters

A technology of solar cells and solar panels, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as difficulty in obtaining physical parameters, large amount of calculation, and inability to express equations explicitly, etc., to achieve improved Calculation accuracy and the effect of reducing the amount of calculation

Active Publication Date: 2017-11-10
SHANDONG UNIV
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Problems solved by technology

[0003] People have done a lot of research on the current-voltage model of solar cells, which are mainly divided into physical models and mathematical models. The physical model is established based on the electrical characteristics of the physical devices inside the solar panel. Each parameter in the model has a clear physical meaning. At present The most commonly used physical model of photovoltaic cells is the single diode model. The shortcoming of this physical model is that its equation cannot be expressed explicitly, which brings great difficulties to the calculation of physical parameters.
[0006] (1) The physical parameter acquisition method needs to use the slope of the short-circuit point and the open-circuit point, and since the experimental data is a set of discrete

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  • Method for utilizing mathematic dominant model to solve solar cell physical parameters
  • Method for utilizing mathematic dominant model to solve solar cell physical parameters
  • Method for utilizing mathematic dominant model to solve solar cell physical parameters

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Embodiment Construction

[0046] The present invention is described in detail below in conjunction with accompanying drawing:

[0047] First, select the appropriate mathematical display model and physical model. The mathematical model is an exponential mathematical model as shown in Equation 2-1. The mathematical model contains four parameters: open-circuit voltage Voc, short-circuit current Isc, γ, and m. The specific relationship between I-V in the mathematical model is as follows

[0048] i=1-(1-γ)v-γv m (2-1)

[0049] v=V / V oc , i=I / I sc , V oc is the open circuit voltage, I sc is the short circuit current

[0050] The physical model is the single diode model, and the circuit diagram of the specific physical model is as follows: figure 1 shown.

[0051] Then the I-V relationship is shown in formula 2-2:

[0052]

[0053] V t = KT / q (2-3)

[0054] Among them, I ph : photocell current;

[0055] I 0 : Diode reverse saturation current;

[0056] n: diode parameters;

[0057] R sh : Pa...

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Abstract

The invention discloses a method for utilizing a mathematic dominant model to solve solar cell physical parameters. Through experiment data, two mathematic model parameters of open-circuit voltage and short-circuit voltage of a photovoltaic panel are directly read, then through a numerical fitting method, two another parameters are solved, therefore the mathematic model is obtained, through the mathematic model parameters, a maximum power point and a current voltage slope are solved, through the parameters, an equation set related to physical parameters is obtained, and five physical parameters are solved. The method for utilizing the mathematic dominant model to solve the solar cell physical parameters has the advantages that the problem is solved that in the physical parameter solving process, the maximum power point and the current voltage slope which are obtained through the experiment data are not precise, and meanwhile the problem of the large calculated amount brought by simultaneous fitting of the five parameters in a traditional physical parameter solving process is solved.

Description

technical field [0001] The invention relates to a method for solving physical parameters of solar cells by using a mathematical explicit model. Background technique [0002] Due to the depletion of traditional energy such as coal and oil, and the incompatibility between the pollution brought by traditional energy and the concept of modern environmental protection, countries are vigorously developing new energy. Photovoltaic power generation has the advantages of being renewable, pollution-free, and noise-free, and has become an important part of new energy power generation. In the process of using solar panels, the establishment of its current-voltage model and parameter solution are of great significance, which are related to the utilization efficiency of solar power generation and grid connection. [0003] People have done a lot of research on the current-voltage model of solar cells, which are mainly divided into physical models and mathematical models. The physical mode...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/367Y02E60/00
Inventor 张云鹏宿嘉磊
Owner SHANDONG UNIV
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