Optimization of the energy transfer in a system combining photovoltaic source to ultracapacitors |
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Authors: | A. Djellad P.O. Logerais A. Omeiri O. Riou J.F. Durastanti |
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Affiliation: | 1. Laboratoire d''électrotechnique, Université Badji Mokhtar, Faculté des sciences de l''ingéniorat, BP 12, 23000 Annaba, Algeria;2. CERTES, Université Paris-Est, IUT de Sénart, Rue Georges Charpak, 77567 Lieusaint, France |
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Abstract: | The optimal energy transfer is investigated for a system combining a photovoltaic module, a bank of ultracapacitors and a resistive load. Each ultracapacitor element is modeled with an accurate multibranch circuit composed of resistors and nonlinear capacitors which permit to reproduce its non-ideal behavior. The charge/discharge of ultracapacitors fed with the photovoltaic module into the resistive load is numerically simulated for irradiance of 1000 W m−2 and cell temperature of 25 °C. The energy and the durations of the charge/discharge cycles are sought according to the low and high voltage thresholds of the controller switches. The cycle efficiency is found in the range [86.5%, 93.5%] and the best time ratio cycle is determined. Finally, the voltage thresholds of the controller switch which enable to transfer the maximal energy within an hour are deduced. |
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Keywords: | Ultracapacitor Photovoltaic energy Multibranch circuit model Controller Optimization |
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