The Clearness Index and the ratio between diffuse and global irradiance for different time scales are used to
define a taxonomy for sky conditions and to study patterns to provide information for production-oriented
probabilistic risk analysis studies for utility-level PV arrays. The study is focused on the definition of
probabilities and distribution functions for the defined taxonomy of sky conditions. Correlations of the
Clearness Index are investigated with different meteorological variables, to finally highlight that the only
important correlation besides the irradiance is given by the relative humidity, though with a negative pattern.
In conclusion, the analysis has shown that the three constraints of the standard test conditions (1000W/m2,
25 ◦C, air mass of 1.5 global) normally applied for laboratory characterisation of PV modules are actually
never simultaneously met outdoor.
COLLI Alessandra;
PAVANELLO Diego;
ZAAIMAN Willem;
HEISER John;
SMITH Scott;
2016-01-14
TAYLOR & FRANCIS
JRC90768
1478-6451,
http://www.tandfonline.com/doi/abs/10.1080/14786451.2014.922975,
https://publications.jrc.ec.europa.eu/repository/handle/JRC90768,
10.1080/14786451.2014.922975,
| Name | Country | City | Type |
|---|
This document is only visible at the Commission level.
You are not authorized to publish or distribute it outside the European Commission.
This is a public document. You can share this publication.
Datasets
| ID | Title | Public URL |
|---|
Dataset collections
| ID | Acronym | Title | Public URL |
|---|
Scripts / source codes
| Description | Public URL |
|---|
Additional supporting files
| File name | Description | File type |
|---|