Abstract
Photovoltaic now used in new irrigation system as a source of renewable energy to run the pumps. It’s can be used in remote areas, which it’s very difficult and more expensive to establish power stations or to install transmission lines to connect these areas with the electrical grid. Surface pump can be used in modern irrigations systems and connected to PV power supply to save energy and water. In this paper a system contains 10 hp surface pump and 15 kW PV system uses to drive the pump unit are studied. The paper investigates mathematical models for surface PV pumping system component. The performance of this system is studied by using this mathematical model during a long time, and the effect of solar radiations values on the system performance is estimated. The paper introduced a simulations and experimental results of the PV pumping in daily hourly average during one year. A good agreement between the simulations results and experimental results are found. The paper investigates the overall performance foxing on the water flow rate values obtained from the unit during one year. Also the electrical power quality analysis of the AC voltage feeds for the pump unit are measured and calculated. Due to solar radiations variation during day hours, and during different months the electrical performance such as; voltage current, power and also harmonic contents is changed depends on the values of solar radiations. The electrical signals and power quality are measured on the field by using power quality devices in different days and statues of operations. The results showed that; during low radiations periods the voltage and frequency are varied in a constant relation to reduce the pump speed and hence reduce the water flow rate to be proportional to input energy come from the PV panels. In case of high solar radiations the inverter runs the pump at constant frequency values depend on pump specifications. And during clouds occurred the system is stopped.
Highlights
Photovoltaic used in new irrigation system as a source of renewable energy to run the pumps
The results showed that during 16th July, as the solar radiations values are high and the occurrence of clouds is small so the power values and the water flow rate values are high and maintain constant during the intervals from 9:00am to 3:00pm and the unit give the maximum flow rate values during this period
The accuracy of the device is five reading per second the software of the device calculate the harmonic contents, total harmonic distortion and the instantaneous flicker occurred during system operation. This is in addition to the main electrical signals such as; voltage, frequency, current, power and power factor (P.F.)
Summary
Egypt is located in a semi-arid climatic zone characterized by hot, dry summers and temperate winters with limited rainfall. A low-cost, sustainable source of energy is required for farmers to continue pumping water for irrigations purposes. In Egypt, it can be use solar-powered water lifting for irrigation, with the use of solar panels covering irrigation canals thereby reducing evaporation losses. This system can provide sustainable source of energy for the lifting of Khaled Mohamed Kotb Fetyan: Electrical Power Quality Analysis and Hydraulic Performance for. Photo Voltaic Surface Water Pumping Unit irrigation water and reduces evaporation losses from irrigation canals, increase efficiency and strengthen local capacities in Egypt to adopt, operate and maintain new techniques for the lifting of irrigation water from canals
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