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Method for extracting parameters of solar cell

A solar cell and parameter extraction technology, which is applied in photovoltaic power generation, electrical components, photovoltaic system monitoring, etc., can solve problems such as errors in extracted parameters

Inactive Publication Date: 2018-11-23
CHANGAN UNIV
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Problems solved by technology

However, the existing algorithm has flaws, the parallel resistance R sh Usually neglected, and the use of "different illumination level methods" will also introduce errors in the extracted parameters, so there is a need to develop a broadly applicable method to determine all parameters of a single IV curve of a solar cell

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  • Method for extracting parameters of solar cell

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Embodiment Construction

[0045] The present invention is further described below in conjunction with accompanying drawing:

[0046] A method for solar cell parameter extraction, comprising the following steps:

[0047] Step 1, according to Kirchhoff's current law, the current-voltage characteristic equation of the equivalent circuit of an ideal single-diode solar cell is obtained, and a solar cell single-diode model is established;

[0048] Step 2, use the semiconductor tester to measure the I~V curve of the solar cell, and combine the I~V curve in the single diode model to obtain the parameters: open circuit voltage V oc , short circuit I sc , to extract the unknown parameter parallel resistance R sh ;

[0049] Step 3, by introducing a temporary parameter R so , n o And perform multiple iterative calculations to determine the unknown parameter series resistance R s , and ideality factor n;

[0050] Step 4, bring the parameter value obtained above into the formula deformation to find the unknow...

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Abstract

The invention provides a method for extracting parameters of a solar cell. The method comprises the following steps that 1) an ideal current voltage characteristic equation of a single-diode solar cell equivalent circuit is obtained according to the kirchhoff current law, and a solar cell single-diode model is established; 2) a semiconductor tester is used for measuring I-V curves of the solar cell, parameters of an open-circuit voltage Voc and a short circuit Isc can be obtained by combination of the I-V curves in the single-diode model, and then an unknown parameter of parallel resistance Rsh is extracted; 3) unknown parameters of series resistance Rs and an ideal factor n are determined by introducing temporary parameters of Rso and no through iterative calculation for multiple times; and 4) an unknown parameter of optical current Iph and a reverse saturation current I0 are obtained by substituting the obtained parameter values into formula deformation.

Description

technical field [0001] The invention belongs to the technical field of solar battery evaluation, in particular to a method for extracting solar battery parameters. Background technique [0002] Due to the increasingly serious environmental pollution and the depletion of fossil fuels, the research on renewable energy has become the focus of attention of all countries. Solar energy is known as an internationally recognized rational alternative energy because of its rich resources, cleanliness and pollution-free advantages. The core of the photovoltaic power generation system is known as a hotspot of research by 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 and the evaluation of battery systems. However, the existing algorithm has flaws, the parallel resistance R sh Usually neglected, and the use of "diff...

Claims

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Application Information

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IPC IPC(8): H02S50/10
CPCH02S50/10Y02E10/50
Inventor 谷文萍张林徐小波周晏萱胡笑钏
Owner CHANGAN UNIV
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