Solar PV Technology based PMSM driven Water Pumping System with Switched-LC Converter

Abstract

Water pumping is an essential operation in agriculture and the use of solar based water pumping has enhanced the viability of this application. This work presents a standalone photovoltaic (PV) water pumping system. This system utilizes a two stage topology with a PV input on boost dc-dc converter and a three-phase voltage source inverter (VSI) fed to a centrifugal pump connected through a Permanent Magnet Synchronous Motor(PMSM) drive. A Switched-LC high gain converter is designed which combines a switched capacitor and switched inductor with a separate input–output interconnection. An Incremental Conductance(INC) algorithm based Maximum Power Point Tracking (MPPT) technique is used for maximum energy extraction from the PV panel and controls the duty ratio of the converter. A Field Oriented Control(FOC) technique is implemented for driving the PMSM coupled water pumping system. The speed control of the drive is done using hysteresis current control method. This system is modeled and operation is verified through simulation studies using MATLAB/Simulink.

Keywords: PV Array, Voltage Source Inverter (VSI), INC algorithm, Field-oriented control, Permanent Magnet Synchronous Motor