Abstract
Due to the increase in electricity and diesel costs, solar photovoltaic pumping systems have become a good solution, especially in rural areas. This work presents a standalone photovoltaic (PV) water pumping system (PVWPS) driven by an induction motor without energy storage to improve the pumping system’s performance. First, a comparison is made between two types: perturb and observe (P&O) method and incremental conductance (INC) MPPT method with a variable step size that is automatically adjusted. Studying these two techniques helps to understand which one can result in a system with less oscillation and greater efficiency when tracking the maximum power point from the PV panel under sudden irradiation conditions. This MPPT works on the operating duty cycle of the boost converter. Then, that converter combines with a voltage source inverter (VSI) to convert DC power to AC power. Second, we use indirect field-oriented control (IRFOC), which drives the three-phase of an induction motor in turn to run the centrifugal pump. The simulation results of this work were obtained using the MATLAB Simulink platform.
Highlights
Increasing demand for renewable energies such as wind, water, geothermal and solar energy has become evident in different areas due to pollution causing global warming and other environmental issues [1]
The first is a PV array connected to a boost converter (DC/DC) that ensures operation at maximum power by adjusting the duty cycle through MPPT control techniques to achieve its maximum value with the available radiation
The step size of this algorithm varies automatically, in a similar way to perturb and observe (P&O). this step size increases as the operating point moves away from the maximum power point (MPP) and decreases as the operating point approaches the MPP
Summary
Increasing demand for renewable energies such as wind, water, geothermal and solar energy has become evident in different areas due to pollution causing global warming and other environmental issues [1]. The speed, flux, and torque of these induction motors are complicated due to their non-linear model To overcome this problem, researchers have studied field-oriented control. This work presents indirect field-oriented control for induction motors in a solar water pumping system. The first is a PV array connected to a boost converter (DC/DC) that ensures operation at maximum power by adjusting the duty cycle through MPPT control techniques to achieve its maximum value with the available radiation. This converter is connected to a voltage source inverter (VSI) which converts DC power to AC power.
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