Performance losses due to soiling on photovoltaic systems

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Supervisor:
Dr. Raisz Dávid Márk
Department of Electric Power Engineering

Thank to the energy politics in the last few years, more and more renewable energy sources are used worldwide. Last year, 2015 were 59 GWs of solar energy capacity newly installed on Earth. While photovoltaic systems spread intensively, many problems, which affect these systems, emerge. The most important negative effect is the phenomenon called soiling, reducing the effectiveness of PVs.

In my study I introduce the circumstances defining soiling, the effects of different types of dirt, and the behaviour of solar panels against foul matter.

I analyse data measured at three different locations. I examine the cases of the solar system on the rooftop of BME Building V1, and two other solar parks. The first one was installed 2015 in Berettyóújfalu, having a capacity of 495 kW, the other one was installed 2013 in Kistelek with capacity of 500 kW. During the analysis of these solar parks, I define a model of energy production based on daily data, which predicts the future production defined by the measured former data (irradiation, cell and external temperature, panel characteristics).

Finally, I introduce and examine different cleaning methods, and I try to propose the optimal date of cleaning in the case of the analysed solar parks.

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