NDLI: Correcting bias in measured module temperature coefficients

Content Provider	IEEE Xplore Digital Library
Author	Hansen, C.W. Farr, M. Pratt, L.
Copyright Year	2014
Description	Author affiliation: CFV Solar Test Lab., Inc., Albuquerque, NM, USA (Pratt, L.) \|\| Sandia Nat. Labs., Albuquerque, NM, USA (Hansen, C.W.; Farr, M.)
Abstract	Temperature coefficients for PV modules describe the change with temperature of current, voltage and power. Coefficients are commonly determined by linear regression using measured module output at fixed irradiance and varying temperatures. We compare temperature coefficients determined for the same modules from both outdoor and indoor measurements. We find systematic bias in the temperature coefficients for voltage and power, with values derived from indoor measurements consistently smaller in absolute value than values derived from outdoor testing during which the module temperature is measured as specified in IEC 61853-1. Our work suggests that the bias results from a corresponding bias in the estimated module temperature. However we have not identified an alternative arrangement of a few thermocouples that would result in consistent values for temperature coefficients from either indoor or outdoor measurements.
Starting Page	2651
Ending Page	2655
File Size	397154
Page Count	5
File Format	PDF
e-ISBN	9781479943982
DOI	10.1109/PVSC.2014.6925475
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-06-08
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Temperature measurement IEC standards Current measurement Voltage measurement Laboratories Temperature testing temperature coefficient photovoltaic modules
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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