Investigation of Standalone Solar Photovoltaic Water Pumping System With Reduced Switch Multilevel Inverter

Abstract

Solar photovoltaic-powered water pumping systems are becoming very successful in regions where there is no opportunity for connecting the electric grid. The photovoltaic technology converts solar energy into electrical energy for operating direct current (DC) or alternating current (AC) motor-based water pump. In the case of a solar AC motor water pump, it engages two energy conversion stages (DC-DC and DC-AC) in the power conditioning unit. This usually resulted in increased size, cost, and complexity and decreases the efficiency of the entire system. The existing two-level inverter (DC-AC) stage generates higher harmonics in output voltage and higher electromagnetic interference that deteriorates directly the AC motor performance. Therefore, as a solution to the addressed problems, in this study, an innovative seven-level inverter with five power semiconductor switches for the operation of 0.5 HP single-phase induction motor pump had been investigated. The proposed multilevel inverter has the capability of providing lesser harmonic voltage that reduces filter requirements; along with this, other part components are used lesser when compared to other conventional multilevel inverters. To provide better insight into the work performance of this proposed topology, the simulation is executed in the MATLAB/Simulink environment, and hardware implementation of the same is depicted. From the results, it is observed that the proposed multilevel inverter topology obtained a total power loss of 1.6034 W and efficiency at 98.11%. This quality output voltage acquired from the multilevel inverter had been fed to drive the induction motor water pump; it pumped the water at the desired flow rate accordingly.

Optimal DC Voltage Control of a Photovoltaic Water Pumping System for Induction Motor Applications

“…The second model is a water pumping system with a singlestage which doesn't consist of a DC-DC converter, so that the DC-AC inverter works with a tracking algorithm that allows it to perform the function of the DC-DC converter. At the same time, it converts the voltage to an alternating voltage, to feed the pump paid by IM, with the imposition of connecting the solar panels in sequential order [11].…”

“…Figures 9,10,and 11 demonstrate that the torque of the induction machine corresponds to the applied load torque using FOC, DTC, and DTC-SVM techniques, respectively, in the solar water pumping system, which is affected by variations in radiation. Initially, the pump load is subjected to a radiation intensity of 1000 W/m 2 .…”

Performance Investigation of a Solar Thermal Collector Based on Nanostructured Energy Materials

“…To abridge the collector and increase its efficiency, direct absorption solar collector (DASC) has been suggested. DASC absorbs large amounts of solar radiation from the Sun, meaning temperature distribution is uniform throughout the surface and results in a small amount of heat loss as compared to surface-based collectors (Arefin, 2019;Poompavai and Kowsalya, 2020). The study of direct absorption solar thermal collectors has been carried out using a composite nanofluids solution (Gorji and Ranjbar, 2017;Wang et al, 2017).…”