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Abstract-The solar water pumping systems (SWPS) is useful in remote or village areas where there is no electricity. In India, SWPS are revolutionizing agriculture by giving farmers access to power for everything, from harvesting crops to pumping water. As the government is working to make solar pumping systems affordable for the agricultural sector, induction motors (IM) are found to be the most appropriate motor type for this application because of its low cost, durability and ruggedness. In this work, the SWPS is powered by an inverter driven three-phase IM with V/f control technique. Various MPPT techniques have been proposed to track maximum power from PV system under partial shading condition. This paper mainly focuses on a hybrid Particle Swarm Optimization-Incremental Conductance (PSO-INC) algorithm to capture the peak power efficiently when IM based SWPS is subjected to partial shading. The results are compared with PSO algorithm, a hybrid PSO-PO method and a modified 0.8 Voc approach. The MATLAB/Simulink environment is used to simulate and test these algorithms on the SWPS system with partial shading. The motor's performance in terms of torque ripple and speed settling time is analyzed.
Index Terms-induction motor, MPPT algorithms, partial shading, solar water pump system, V/f control.
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I. Introduction
The importance of renewable energy is growing substantially on a worldwide scale. Solar energy is becoming the cheapest renewable energy source in the world since the cost of solar panels is falling considerably. One of the many useful uses of solar energy is solar water pumps. Due to lack of irrigation, most farmers in India are reliant on the monsoon to sustain their agriculture. Therefore, the only way to supply crops with water year-round, is through groundwater. For irrigation, many farmers rely on diesel or electric pumps which lead to recurring cost. Solar water pumping systems (SWPS) are highly reliable, easy to install and operate. They need low maintenance, require no fuel and are eco-friendly [1].
Using an appropriate Maximum Power Point Tracking (MPPT) controller is crucial to obtaining the maximum power possible from the panels. When the shading is uniform, there is a single Maximum Power Point (MPP) seen on the PV curves; however, during the occurrence of non-uniform shading, the system shows multiple peaks,...