PV Array Reconfiguration for Three Level PV Water Pumping System

Abstract

This work proposes a reconfiguration-based 2-stage 3-level PV-based water pumping system. The proposed reconfiguration method enhances the PV power during partial shading conditions (PSC). Besides, the modified MPPT algorithm extracts the enhanced PV output power from the Total Cross Tied (TCT) PV array. Two inverters produce the 3-level output voltage, which improves the THD of the motor phase current. The sliding mode control approach regulates dc-link voltage. The speed of the open end winding induction motor (OEWIM) is controlled using the $V/f$ method, whereas the speed reference is obtained using the PV power feedforward term and sliding mode control. The proposed system performance is validated using the MATLAB simulink, and obtained results are pretty satisfactory.