Method and system for predicting working characteristics of photovoltaic cells under different light temperature conditions
A technology of photovoltaic cells and working characteristics, which is applied in the monitoring of photovoltaic systems, photovoltaic power generation, electrical components, etc., can solve problems such as difficulty in obtaining physical parameters and inability to express equations explicitly, and achieve the effect of improving computing efficiency.
Active Publication Date: 2019-03-22
SHANDONG UNIV
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[0004] The current-voltage model of photovoltaic cells is mainly divided into physical models and mathematical models. At present, the most commonly used physical model is the single diode model. Its five parameters have clear physical meanings, but its equations cannot be expressed explicitly. difficult to obtain
The mathematical model is obtained based on the mathematical function relationship of the current-voltage curve. The current-voltage equation is an explicit expression. It is widely used in maximum power tracking and other aspects, but there are few reports on its application to the prediction of the working characteristics of photovoltaic cells.
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[0055] The present invention is described in detail below in conjunction with accompanying drawing:
[0056] It should be pointed out that the following detailed description is exemplary and is intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
[0057] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.
[0058]...
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The invention discloses a method and a system for predicting working characteristics of photovoltaic cell under different illumination temperature conditions. According to the measured I V characteristic curve of the photovoltaic plate under the reference condition, the shape parameters of the mathematical model under the reference condition are solved firstly, and then according to the relationship between the shape parameters and the physical parameters, combined with the law of the physical parameters changing with temperature and light, the relation between the shape parameters and the temperature and light is obtained, which is brought into the light temperature to be predicted, then the working characteristics of the cell board can be obtained under the predicted condition The methodand system for predicting working characteristics of photovoltaic cell under different illumination temperature conditions has the beneficial effects that through the mathematical model, only four parameters need to be determined under the reference condition to avoid the problem of large workload with five physical parameters calculated by the traditional prediction method, so that the calculation efficiency is improved.
Description
technical field [0001] The invention relates to the technical field of prediction of photovoltaic cell operating characteristics, in particular to a method and system for predicting the operating characteristics of photovoltaic cells under different light temperature conditions. Background technique [0002] As my country's economy continues to develop at a high speed, coal shortages, electricity shortages, and oil shortages appear almost simultaneously. The energy problem is not only the gap between supply and demand. In addition to meeting the ever-increasing energy demand, my country's energy industry also faces the contradiction between energy development and environmental protection - the limitation of conventional energy and the increasingly prominent environmental problems. Therefore, the new energy with the characteristics of environmental protection and renewable is getting more and more attention from all countries. Photovoltaic power generation is safe, reliable,...
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IPC IPC(8): H02S50/15
CPCH02S50/15Y02E10/50
Inventor 张云鹏张晨宿嘉磊
Owner SHANDONG UNIV