Enhancing energy efficiency of Khmelnytskyi national university
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Дата
2017-11
Автори
Мартинюк, Валерій Володимирович
Бойко, Юлій Миколайович
Martynyuk, V.V.
Boiko, J.M.
Назва журналу
Номер ISSN
Назва тому
Видавець
UTP University of Science and Technology, Bydgoszcs, Poland
Анотація
Photovoltaic systems (PVSs) require an energy storage buffer to supply the loads also when the solar energy is not enough. Lead acid batteries are typically used for this purpose. High and fast energy (current) demands from the load can degrade the performances and lifetime of such batteries. Because of the output dependence on weather conditions, PVSs produce incomplete charge/discharge cycles, resulting in a low State of Charge (SoC). In these conditions, batteries cannot cope with fast and sudden energy demands from the load, as necessary for the applications (as motors and water pumps) characterized by transients or start-ups with current requirements for few seconds up to 6-8 times the rated current. For this reason, PVSs are not the best energy source to charge batteries.
Опис
Increase in the efficiency of the electric heating system with the combined electric energy storage system is realized by the automatic control system. The automatic control system provides maximum power of solar panels which allows increasing their efficiency. It is suggested to use smart grid technology to provide efficient work of the combined electric energy system. Such a system allows selecting the optimal charge/discharge modes using mathematical models of supercapacitor cells and supercapacitor modules developed in Khmelnytskyi National University. The use of such novel mathematical models enables to reduce energy losses in this system, control its operation abilities and find possible failures. A new technology of Maximum Power Point Tracking for solar panels has been developed in Khmelnytskyi National University. It enables taking maximum power from each separate solar panel, not a string of solar panels, in contrast to the existing MPPT technologies. Our technology enables to control each panel separately, find solar panels with failures and increase the efficiency of solar panels in general. A special software capable of monitoring the work of batteries, supercapacitors and solar panels and providing effective management of the system as a whole has also been developed in Khmelnytskyi National University.
Ключові слова
photovoltaic systems, supercapacitor, energy storage systems
Бібліографічний опис
Martynyuk V. V. Enhancing energy efficiency of Khmelnytskyi national university / V. V. Martynyuk, J. M. Boiko // Actual problems of modern science : Monograph / ed. by Musial Janusz, Polishchuk Oleh, Sorokatji Ruslan. – Bydgoszcz, 2017. – P. 748-753. ISBN 978-83-938655-3-6