Improvement and optimization of an autonomous photovoltaic pumping system

Abstract

The climate in Algeria can be considered semiarid in most areas. The water demand is expected to increase because of population growth in the coming years. Water supply is always a great concern for the populations in the landlocked regions. Pumping water using the solar photovoltaic energy is a well-suited solution where the traditional electricity grid is absent. Indeed, the majority of these regions are very sunny, and water is available in underground aquifers. Our system consists on a photovoltaic generator (PVG), a direct current (DC)-DC converters, a multilevel inverter with five levels, and an asynchronous motor coupled to a centrifugal pump. The objective of this process is to ensure the operation at maximum power of the PVG system under various conditions by the maximum power point tracking (MPPT) method based on fuzzy logic control (FLC). The modeling and simulation of this system were carried out and based on our experimental work in the site meteorological database of city Adrar in Algeria. This system avoids the use of a motor pump (diesel) and eliminates costs and operating constraints in an environment friendly manner according to the COP21 recommendation.

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