A new estimation method of irradiance on a partially shaded PV generator in grid-connected photovoltaic systems

被引：99

作者：

Drif, M. ^{[1
,2
]}

Perez, P. J. ^{[2
]}

Aguilera, J. ^{[2
]}

Aguilar, J. D. ^{[2
]}

机构：

[1] Ctr Dev Energies Renouvelables, Algiers 16340, Algeria

[2] Univ Jaen, Grp Invest IDEA, Dept Elect, Escuela Politecn Super, Jaen 23071, Spain

来源：

RENEWABLE ENERGY | 2008年 / 33卷 / 09期

关键词：

grid-connected PV system; irradiance on tilted planes; partial shading; shading factor; obstacles' outline;

D O I：

10.1016/j.renene.2007.12.010

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A new method for estimating the irradiance on a partially shaded photovoltaic generator system is proposed. The basic principle of this method consists of two parts: firstly, an approximation of the obstacles' outline or the local horizon by a set of linear functions. Here, a survey of the surroundings is based on the reading of the topographic coordinates of the only significant points of all the objects surrounding the photovoltaic generator. Secondly, the irradiance on the photovoltaic plane is estimated using an accurate model such as the Perez et al. model and assuming that the shading affects both the direct radiation and a part of the diffuse component (circumsolar component). The aim of this paper is to present the principles of the proposed method and the algorithm used for calculating the irradiance on shaded planes. In addition, the results of the comparison between the simulated and measured values of this method are presented. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：2048 / 2056

页数：9

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