Direct torque control of induction motor pumping system fed by a photovoltaic generator

This paper deals with the modeling of a centrifugal pump system driven by a three-phase induction motor, which is powered by a photovoltaic generator. The system includes solar panel, a DC / DC converter equipped with its MPPT control, a the three-phase PWM (Pulse Width Modulation) voltage inverter and a centrifugal pump driven by a three phase induction motor. Several algorithms of maximum power point tracking are presented in literature; the Perturb & Observe (P&O) method is studied in this paper. In order to regulate the flow of the centrifugal pump, a direct control of the torque (DTC) of the induction machine is used for controlling the speed. The simulation results are carried out using Matlab/Simulink.