Novel control of standalone “Photovoltaic (PV) based Induction Motor Driven Water Pumping System” without battery

Abstract

Water pumping system powered by PV without using battery bank is attracting by many scholars. Using of batteries can increase the overall system cost during the operation. A novel control algorithm must be incorporated to manage energy balance between load and generation since power produced from solar cells depends on solar irradiance. In order to lift the water from ground, a motor – pump set is used where power is fed by PV systems through proper converter. Generally induction motors are commonly using in water pumping systems. A direct torque control is applied on three phase induction motor in this paper. Three different configurations were discussed in this paper. In order to eliminate an extra converter for MPPT operation of the PV panels, the proposed method is forced the inverter to acts as a MPPT converter of the PV system. Various results are presented in this paper to validate the proposed method.