Performance Analysis of Single-Stage and Two-Stage VSI-fed IM Drive for Solar Pump Irrigation Systems

Performance comparison analysis of two-stage and single-stage induction motor (IM) drive fed by voltage source inverter (VSI) for solar pump irrigation system has been done for the economic consideration of the system in the agriculture field. Both stages have common components of the photovoltaic (PV) system and VSI-fed IM drives with pump load. In both configurations, the incremental conductance (INC) maximum power point tracking technique (MPPTT) has been accustomed to extract for PV array's maximum power. The DC/DC boost converter is featured in a two-stage system and is used to enhance the level of voltage for the VSI's input and the system's load requirement. In single-stage, the PV array is tied directly to the VSI and the whole drive of the IM with the pump. The system uses direct torque control (DTC) strategy for the speed regulation of the IM drive, preserving both the contours of PV array fed IM drive with pump load. To model and simulate the system, MATLAB/Simulink software is employed.