Operation of photovoltaic array with small energy buffer under variable insolation conditions

• Autorzy: Marańda W. , Piotrowicz M.
• Języki publikacji: EN

Abstrakty

EN

Photovoltaic systems can operate successfully also in less favorable climatic conditions, however, their performance can be improved by better adjustment to the local conditions. The specific feature of climate in Central Europe is the frequent occurrence of short and deep changes of solar radiation, especially during summer months. This highly variable nature of solar radiation makes it impossible to deliver energy from photovoltaic (PV) system at a stable power level in short terms. For grid-connected PV-systems it has negative effect on power condition devices, forcing them to continuous search for maximum power point and lowering the overall efficiently. For autonomous systems it means constant switching between charging and discharging cycles, shortening batteries life. In this case, the small energy storage can mitigate the rapid power fluctuations, providing energy with a stable power level from the photovoltaic generator for a longer intervals during the day. The paper presents the guidelines for dimensioning the small energy buffer versus PV-generator nominal power and targeted load. The simulation is based on solar radiation data from Poland, measured with 5 s time resolution.

Słowa kluczowe

EN

photovoltaic system; energy storage

PL

system fotowoltaiczny; magazynowanie energii

• Wydawca: Lodz University of Technology. Department of Microelectronics and Computer Science
• Czasopismo: International Journal of Microelectronics and Computer Science
• Rocznik: 2010
• Tom: Vol. 1, nr 2
• Strony: 195--200
• Opis fizyczny: Bibliogr. 4 poz.

Twórcy

autor

Marańda W.

autor

Piotrowicz M.

• Department of Microelectronics and Computer Science, Faculty of Electrical, Electronic, Computer and Control Engineering, Technical University of Lodz, Wólczańska 221/223, 90-924 Łódź, Poland,

Bibliografia

• [1] E. Lorenzo, Solar Electricity. Engineering of photovoltaic systems. PRO-GENSA. Spain, 1994.
• [2] M. G. Villalva, J. R. Gazoli, and E. R. Filho, "Comprehensive approach to modeling and simulation of photovoltaic arrays," IEEE Trans. Power Election., vol. 24, no. 5, pp. 1198-1208, 2009.
• [3] M. Piotrowicz and W. Marańda, 'Temperature analysis system for photovoltaic installation," in Proceedings of the 16th MIXDES Conference. Łódź. Poland, Jun. 2009.
• [4] W. Marańda. G. Jabłoński, and D. Makowski, "Advanced monitoring system for photovoltaic generator," in Proceedings of the 11th Electronic Devices and Systems Conference, Brno, Czech Republik, Sep. 2004.