Creator:
El Sioufi, Efstratios
Ktena, Aphrodite
Manasis, Christos
Konstantaras, John
Abstract:
In this work, we analyzed the operation of the photovoltaic panel under different conditions
of solar radiation intensity and temperature. This research consists of two main parts. The
experimental part involved carrying out a series of measurements and tests on a photovoltaic
panel under controlled artificial lighting conditions, both with shading and without shading.
The research was conducted at the Energy and Environmental Requirements laboratory of the
Evripos complex of the National and Kapodistrian University of Athens. The other part involves
simulations of the experimental measurements using the 5-parameter model, which was
developed in the MATLAB environment.
The reason we engaged in this research, was to address the low performance of photovoltaic
systems under conditions of partial or total shading. Our aim was to propose an improved 5-
parameter model, and we present the results of our simulations. For this research, we
performed measurements using a system that simulates real conditions, including solar
radiation, temperatures and shading, at various tilt angles of panel. We then compared the
modeling results between the classic 5-parameter model and our improved model (5
parameters), expecting better performance under extreme conditions.
In the first chapter of the paper, we examined the structure of photovoltaic systems used for
electricity production. We introduced the 5-parameter model, which is a way to describe the
performance of a PV panel under various conditions, which we used in our simulations. Finally,
we presented the basic types of photovoltaic systems.
In the second chapter, we present the experimental setup and the technique we used to record
the radiation through a thermal camera. We provide detailed radiation tables for shaded and
non-shaded conditions. Tests were performed for each condition at three different angles (0,
4,5 and 9 degrees). Additionally, we present the I-V and P-V curves and compare them with
the curves from the first cycle of measurements and simulations.
The third chapter presents the conclusions obtained from the comparison between the classic
5-parameter model and the improved 5-parameter model are presented. Appendices A and B
present the equipment and tools used in the experimental part, as well as the tables of the
measurements for the shaded and non-shaded conditions and the different angles.
Finally, appendix C presents the MATLAB code.
Notes:
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