INTRODUCTION
The use of renewable energies, especially the photovoltaic
one, is continuously increasing worldwide as the traditional
energy resources are costly and cause serious environmental
pollution. The most popular applications of the photovoltaic
energy is the water pumping system driven by electrical
motors. Indeed it is the best adopted energy resource to supply
drinking water in scattered and remote regions.
Modeling the photovoltaic pumping systems and especially
simulating the detailed behavior of the photovoltaic chain
conversion based on the implementation of specific control
laws MPPT have been well documented [1, 2, 3].
Many works dealt with the choice of the drive system to
interface to the PV source, the type of pumps to use and the
ways to control and optimize the whole system [4]. In fact,
many researchers have established an explicit relationship to
determine the rotor speed reference of the asynchronous
machine and therefore the pump flow, depending on the state
of the solar irradiation but without taking into consideration
the level of water in the tank to fill [5,10].
The objective of this study is therefore, to present a
proposal on how to determine the reference speed necessary
for vector control of induction motor. The idea is to develop
an algorithm controller which aims to regulate the water level
in the tank taking into consideration the state of the solar
illumination.
Photovoltaic pumping in a closed loop will allow us to win a
lot of energy which can be used in other applications.