Experimental Study of the Compensation of the Variability of Solar Pumping Power Over the Sun without Storage using Supercapacitors in the Context of Burkina Faso

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Résumé

Based on experimental results, we have demonstrated the ability of supercapacitors to provide the power needed to initiate the start-up of a pump during low solar irradiation. The objective of this study is to optimize solar pumping over the sun by compensating for power variability for better efficiency. In order to ensure the continuity of power for a permanent operating system, the use of supercapacitors would be a necessity. To this end, we first carried out an experimental study of direct charging of supercapacitors by solar irradiation. On the other hand, we carried out an experiment of discharging the supercapacitors by direct power supply of the solar pump. The results obtained show that for fluctuations of a duration of 7 minutes corresponding to a stored energy of 21.715 Wh for a pump with a power of 180 W, the supercapacitors correctly ensure the compensation of the variability of the power by a continuity of power supply of the pump. They can provide the power needed to start the pump in case of low solar irradiation or serve as an energy source in the case of short cloudy periods. This system can be used for agricultural production to obtain better yields.

Mots-clés

Supercapacitors, power, variability, irradiation, pump