Module temperature dispersion within a large PV array: observations at the Amareleja PV plant

Muñoz Escribano, Mikel and García Solano, Miguel and Parra Laita, Íñigo de la and Marcos Álvarez, Javier and Marroyo Palomo, Luis and Lorenzo Pigueiras, Eduardo (2018). Module temperature dispersion within a large PV array: observations at the Amareleja PV plant. "IEEE Journal of Photovoltaics", v. 8 (n. 6); pp. 1-6. ISSN 2156-3381. https://doi.org/10.1109/JPHOTOV.2018.2868005.

Description

Title: Module temperature dispersion within a large PV array: observations at the Amareleja PV plant
Author/s:
  • Muñoz Escribano, Mikel
  • García Solano, Miguel
  • Parra Laita, Íñigo de la
  • Marcos Álvarez, Javier
  • Marroyo Palomo, Luis
  • Lorenzo Pigueiras, Eduardo
Item Type: Article
Título de Revista/Publicación: IEEE Journal of Photovoltaics
Date: 24 September 2018
ISSN: 2156-3381
Volume: 8
Subjects:
Freetext Keywords: Dispersión, photovoltaic (PV) array, standard test conditions (STC) power, temperatura, uncertainty, wind
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Electrónica Física
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

In-field photovoltaic (PV) module and array characterization is becoming increasingly important within the particular framework of quality assurance procedures at large commercial PV plants. In this context, the correct measurement of the module temperature is critical in order to reduce uncertainty and increase repeatability of results. In the case of large PV array characterization, the measurement provided by the sensors may not be representative of the PV array as a whole given the great diversity of operating conditions occurring throughout its surface area. Spatial temperature differences within a PV array of less than 5 K are typically considered in practice. However, the temperature differences observed at a commercial PV plant in Amareleja (Portugal) are more than twice those typically assumed. Such high differences may considerably increase the uncertainty in the determination of the PV array operating temperature and, hence, in its standard test conditions power characterization. This paper quantifies the uncertainty associated with the in-field measurement of the operating temperature of large PV arrays and their individual PV modules as a function of the type, number, and location of the temperature sensors used. Furthermore, the incident irradiance and particular wind speed conditions over the PV array have been clearly identified as the main causes of these temperature differences, showing that the optimum conditions to perform the PV array characterization do not correspond to low wind speed conditions, as recommended by many authors.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainDPI2016-80641-RUnspecifiedUnspecifiedUnspecified
Government of SpainDPI2016-80642-RUnspecifiedUnspecifiedUnspecified

More information

Item ID: 52310
DC Identifier: http://oa.upm.es/52310/
OAI Identifier: oai:oa.upm.es:52310
DOI: 10.1109/JPHOTOV.2018.2868005
Official URL: https://ieeexplore.ieee.org/document/8463587/
Deposited by: Memoria Investigacion
Deposited on: 06 Nov 2018 17:12
Last Modified: 26 Apr 2019 08:34
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