A Validation Study on Series Resistance Calculation According to IEC60891, Ed.2.0 (2009)
The series resistance, Rs, of a PV module is a factor that can adversely affect its performance. Several
physical factors contribute to its value such as the bulk resistance of the semiconductor cell material, the metallic
interconnections and the junction box terminations. An accurate determination of Rs enables a quantitative
assessment of the impact of these factors on the module performance for an eventual performance optimization and
an estimate of its degradation. There are several experimental methods for determining Rs; the second edition (2009)
of the IEC60891 normative standard provides an iterative calculation procedure based on I-V curves measured at
different irradiances. We present a quantitative investigation of the impact of the standard’s calculation parameters on
the overall precision of the Rs calculation. We also analyze the Rs calculation approach of the IEC60891 first edition
(1987), highlighting how this formulation has a strong operator dependence.
POLVERINI Davide;
TZAMALIS Georgios;
MUELLEJANS Harald;
2011-11-30
WIP Wirtschaft und Infrastruktur GmbH & Co Planungs KG
JRC63235
https://publications.jrc.ec.europa.eu/repository/handle/JRC63235,
10.4229/26thEUPVSEC2011-4AV.1.40,
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