Memorias de investigación
Artículos en revistas:
Solar irradiation and PV module temperature dispersion at a large-scale PV plant
Año:2015
Áreas de investigación
  • Ingeniería eléctrica, electrónica y automática,
  • Generación fotovoltaica
Datos
Descripción
When evaluating the performance of a photovoltaic (PV) system, it is extremely important to correctly measure the plant operating conditions: incident irradiation and cell temperature. At large-size PV plants, the possible dispersion of the plant operating conditions may affect the representativeness of the values measured at one single point. The available literature contains many observations on irradiance dispersion (typically associated to high temporal resolution experiments) and its effects on the PV power output (unexpected power transients, power fluctuations, etc.). However no studies have been made on the long-term energy-related effects of geographic dispersion of solar irradiation, which could affect, for example, to the uncertainty in determining energy performance indexes like PR. This paper analyses the geographical dispersion in the PV operating conditions observed at low temporal resolutions (day, month and year) at two PV plants located, respectively, in the south of Portugal and the north of Spain. It shows that daily irradiation deviations are significantly higher than is commonly supposed. Furthermore, once the measurement points are a certain distance apart (a few hundred metres), the deviations in irradiation appear to be independent of distance. This could help to determine how many irradiance sensors to install in order to reduce uncertainty. Daily mean temperature differences between different points at a large-scale PV plant range from 1 to 7?K and are not related to the distance between measurement points.
Internacional
Si
JCR del ISI
Si
Título de la revista
Progress in Photovoltaics
ISSN
1062-7995
Factor de impacto JCR
9,696
Información de impacto
Volumen
23
DOI
10.1002/pip.2518
Número de revista
10
Desde la página
1381
Hasta la página
1389
Mes
SIN MES
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Participantes
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Centro o Instituto I+D+i: Instituto de Energía Solar
  • Departamento: Electrónica Física