Identification of clear days from solar irradiance observations using a new method based on the wavelet transform

RENEWABLE ENERGY

卷:101

Article

Djafer, D.¹  Irbah, A.²  Zaiani, M.¹ 

[1] CDER, URAER, Ghardaia 47133, Algeria

[2] Univ Versailles St Quentin En Yvelines, Univ Paris VI Pierre & Marie Curie, Lab Atmospheres Milieux Observat Spatiales LATMOS, CNRS,UMR8190,INSU, F-78280 Guyancourt, France

关键词: Solar radiation;    Turbidity parameters;    Clearness index;    Wavelet transform;   

DOI  :  10.1016/j.renene.2016.08.038

来源: Elsevier

【 摘 要 】

A new method using the wavelet transform properties is developed to determine clear days of solar irradiance. These days are needed to model the solar radiation and to compare the existing empirical models. We use this method to process four years of global solar irradiation data collected at the Research Unit of Applied Renewable Energies at Ghardaia city in Algeria. We also determine clear days from this data set using a standard method based on the clearness index criteria. The results show that the two methods give different numbers of clear days. The effect of this difference is analyzed by computing the Global Solar Radiation (GSR) with the Iqbal C model but also by the estimation of turbidity parameters using for that a innovative approach. We find that some significant differences are observed in the GSR modeling leading to bad estimation of turbidity parameters. We conclude that using our method is therefore more efficient since it is not dependent of the site and observations. (C) 2016 Elsevier Ltd. All rights reserved.

【 授权许可】

Free