QUALITY ANALYSIS OF HYBRID POWER SUPPLY (ELECTRICITY GRID-PHOTOVOLTAIC GENERATOR) OF WATER PUMPING SYSTEM DRIVEN BY INDUCTION MOTOR

The availability of significant amount of solar energy in Sahelian countries can make the application of water pumping through photovoltaic generators very attractive solution for irrigation of agricultural land and drinking water supply to remote sites. This paper discusses the effect of harmonic currents on the energy efficiency of electromechanical equipment in a water pumping system. The electricity grid is already assumed to pollute upstream by non-linear loads in which the current is not proportional to the voltage applied. These harmonics do not produce active or reactive power, only losses by the Joule effect. The most important long-term effect is of a thermal nature, it results in the heating of the windings in electric motors, which leads to premature fatigue of the equipment, and thus to an ageing of the equipment. The photovoltaic generator, being an independent energy source, the main charge is the device under study. The quality of the electrical energy supplied provides more or less good performance for the electromechanical device. The results obtained showed that the supply of the motor pump by the photovoltaic generator via PWM inverter generates less harmonics compared to the electrical distribution network and allows an interesting improvement in efficiency.