Solar PV-Fed Grid-Interactive PMSM-Driven Water Pumping System with Switched-LC Converter

Abstract

Solar-based water pumping has enhanced the feasibility of pumping application since water pumping is an essential operation in agriculture. A solar photovoltaic (PV) water pumping system having two stages with a grid interaction is presented in this article. A switched-LC high-gain converter with a combination of switched capacitor and switched inductor is used at first stage as boost converter which is fed with a PV input and a single-phase grid for an effectual power transfer between them to feed a centrifugal pump connected with a permanent magnet synchronous motor (PMSM) drive through a three-phase voltage source inverter (VSI). An uninterrupted pumping operation is provided to the consumer with grid integration at any insolation range. When no pumping is required, the PV power feeds the utility grid. To control converter duty ratio and to extract maximum energy from PV panel, the maximum power point tracking is implemented using incremental conductance (INC) algorithm. A field-oriented control technique is carried out to drive the motor to rotate the pump. The simulation of the system is done in MATLAB, and results are developed.