Evaluación y desarrollo de técnicas para la caracterización de sistemas fotovoltaicos a sol real

Abstract

Obtaining the characteristic curve Current - Voltage (I-V) of a photovoltaic device is the essential experiment that provides the most information about its behavior. This PhD thesis aims to provide solutions to the main limitations of current commercial PV characterization systems. As the most outstanding results, two systems have been developed that are open and easily reproducible by the scientific community. The first one, from general purpose laboratory instrumentation and free hardware platforms. The second one, designed and built exclusively from free hardware platforms and electronic designs. This last one has a very high precision in despite of its low cost. As a case of application, several simple methods of parameter extraction have been implemented in the control and data processing software and their level of validity has been analysed when characterising third generation photovoltaic systems based on tandem cells. A more extensive study of the behavior of each of these parameters in comparison between monocrystalline silicon PV technologies and tandem cells has also been performed.