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http://dx.doi.org/10.5762/KAIS.2021.22.6.27

A Study on Degradation Phenomenon Based on Test Device for Aging Diagnosis in PV Modules  

Shen, Jian (Korea University of Technology and Education)
Lee, Hu-Dong (Korea University of Technology and Education)
Tae, Dong-Hyun (Korea University of Technology and Education)
Rho, Dae-Seok (Korea University of Technology and Education)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.22, no.6, 2021 , pp. 27-35 More about this Journal
Abstract
Generally, a proper evaluation method of the aging phenomenon of PV modules is required as the electrical performance and lifespan of PV modules can degrade significantly due to several environmental factors, while they are generally known as devices that are used semi-permanently for more than 20 years. On the other hand, there is a lack of objectivity in the existing evaluation method of the aging phenomenon, which compares the adjusted PV output based on STC with the initial PV module specifications due to the data distortion while adjusting the measured data. Therefore, this study implemented a test device for an aging diagnosis to measure and collect actual data from a PV module section and modeled the data for aging using MATLAB S/W to minimize the variability of the PV output, communication error, and delay. Furthermore, this study confirmed the usefulness of the presented test device for aging diagnosis of the PV modules by diagnosing the total period and yearly-basis degradation rate of aging PV modules as 25.73% and 1.55%, respectively, according to the on-site output characteristics of the PV modules by season.
Keywords
PV Module; Aging Characteristics; Aging Factors; Output Characteristics; Aging Rate; Test Device; Matlab;
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