Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Solar irradiation and PV module temperature dispersion at a large-scale PV plant
Year:2015
Research Areas
  • Electric engineers, electronic and automatic (eil),
  • Photovoltaic generation
Information
Abstract
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.
International
Si
JCR
Si
Title
Progress in Photovoltaics
ISBN
1062-7995
Impact factor JCR
9,696
Impact info
Volume
23
10.1002/pip.2518
Journal number
10
From page
1381
To page
1389
Month
SIN MES
Ranking
Participants
  • Autor: M. García
  • Autor: L. Marroyo
  • Autor: Antonio-P.Eduardo Lorenzo Pigueiras (UPM)
  • Autor: J. Marcos
  • Autor: M. Pérez
Research Group, Departaments and Institutes related
  • Creador: Centro o Instituto I+D+i: Instituto de Energía Solar
  • Departamento: Electrónica Física
S2i 2019 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)