Detection of the voltage distribution in photovoltaic modules by electroluminescence imaging

被引：67

作者：

Potthoff, Torbert ^{[1
]}

Bothe, Karsten ^{[1
]}

Eitner, Ulrich ^{[1
]}

Hinken, David ^{[1
]}

Koentges, Marc ^{[1
]}

机构：

[1] Inst Solarenergieforsch Hameln Emmerthal GmbH ISF, D-33860 Emmerthal, Germany

来源：

PROGRESS IN PHOTOVOLTAICS | 2010年 / 18卷 / 02期

关键词：

electroluminescence; PV module; contactless voltage measurement;

D O I：

10.1002/pip.941

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

We introduce an approach to determine the operating voltage of individual solar cells in photovoltaic (PV) modules by electroluminescence (EL) imaging. The highest EL signal of each solar cell is proportional to its operating voltage. Moreover the sum of all operating voltages equals the externally applied module voltage. Thus the operating voltage of individual solar cells is determined from the measured EL signal. The reliability of this relation is verified by measurements on specially prepared PV modules allowing us to measure the individual operating cell voltage. The experimentally measured cell voltages are deduced with an uncertainty of +/- 1% from an EL image. Moreover, the operating cell voltages determined from the EL image are used to calculate the module series resistance. Comparing experimentally determined values from the operating cell voltage and the total current flowing supplied to the module with calculated module series resistances using tabulated material and typical solar cell parameters, a very good correspondence is found. Copyright (C) 2010 John Wiley & Sons, Ltd.

引用

页码：100 / 106

页数：7

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