Modeling and control of a pv-powered pumping system using a switched capacitor inverter

Abstract

This thesis explores the design, modeling, and simulation of a switched capacitor multilevel inverter (SCMLI) for photovoltaic (PV) water pumping systems. The objective is to develop an efficient and cost-effective inverter capable of maximizing energy extraction from solar panels while ensuring optimal motor performance. The proposed system is evaluated under various environmental conditions and using three control strategies: scalar V/f control, Direct Torque Control (DTC), and a hybrid DTC with Space Vector Modulation (SVM). Simulation results confirm the effectiveness of the SCMLI in achieving high voltage gain, low harmonic distortion, and stable operation. The impact of temperature and solar irradiation variation on system performance is also investigated, confirming the robustness of the proposed configuration for remote and off-grid applications. Furthermore, experimental validation of the V/f control strategy was carried out, demonstrating the practical feasibility and real-world performance of the proposed system.