Analysis of mismatch and shading effects in a photovoltaic array using different technologies

The International Congress of Mechanical Engineering and Agricultural Sciences 2013

机械制造;农业科学

Guerrero, J.^1 ; Muñoz, Y.^1 ; Ibáñez, F.^2 ; Ospino, A.^3

Faculty of Energy Engineering, Universidad Autónoma de Bucaramanga UNAB, Bucaramanga, Santander, Colombia^1

Department of Electronic Engineering, Institute of Energy Engineering IIE, Universidad Politécnica de Valencia UPV, Valencia, Spain^2

Renewable Energy, Universidad de la Costa CUC, Barranquilla, Colombia^3

关键词: Ambient conditions;    Controlled conditions;    Data validation;    Energy technologies;    Field measurement;    MATLAB/ SIMULINK;    Photovoltaic arrays;    Standard conditions;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/59/1/012007/pdf
DOI  :  10.1088/1757-899X/59/1/012007

学科分类：农业科学（综合）

来源: IOP

【 摘 要 】

In this paper, we analyze the performance of a photovoltaic array implemented in the Universidad Polite´cnica de Valencia which consists of modules of different technologies and power, connected in series, in order to quantify the energy losses due to mismatch and the effect of the shadows. To do this, the performance of the modules was measured in operation under ambient conditions with field measurement equipment (AMPROBE Solar Analyzer, Solar - 4000), which allows the extrapolation of measures to standard conditions STC. For the data validation, measures under controlled conditions were taken to some modules in the flash test laboratory of the Institute of Energy Technology ITE of Valencia in Spain. Subsequently the array curves measured were validated with a photovoltaic array model developed in MATLAB-Simulink for the same conditions and technologies. The results of this particular array are lost up to 20% of the energy supplied due to the modules mismatch. The study shows the curves and the energy loss due to shadows modules. This result opens scenarios for conceivable modifications to the PV field configurations today, chosen during the design stage and unchangeable during the operating stage; and gives greater importance to the energy loss by mismatch in the PV array.