الفهرس 
AcknowledgmentOnly 14 pages are availabe for public view
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Abstract
The research aims to find an intelligent and effective control strategy for the designed Photovoltaic Pumping System (PVPS) with microcontrollers based on the technique of tracking the maximum power point in order to feed AC loads with the climatic changes that occur when operating the PVPS, and to investigate the extent to which the system can operate in remote areas for agricultural purposes, water pumping, etc., while keeping up with changing loads under different climatic conditions affecting system performance. Along with the expansion of the use of AC drives in all different fields, especially in industrial processes, there has been a great interest in controlling these drives to suit different loads. The simplified design and practical implementation of the PVPS with microcontrollers with effective performance and lowest cost to contribute to the solution of the energy crisis, especially the Arab Republic of Egypt. The PVPS was designed and implemented in the Solar Energy Laboratory of the Electrical Engineering Department, Faculty of Engineering, Mansoura University. It includes a Maximum Power Point Tracker (MPPT) for solar cells and an inverter from power, control and protection circuits. Studying the selected solar cells group and determining the safe operating area on its electrical performance curve and determining the maximum power point and its associated voltage vector, the MPPT is designed to stabilize the cell voltage at the maximum power point no matter what the load vector changes. The intelligent type tracker is designed using a microcontroller, with Pulse Width Modulation (PWM) control programming in a language that the microcontroller understands after a flow map of the data specified for the operation, and the design of all electronic circuits attached to it used in the design of the PVPS. In order to maintain the output voltage of the solar cells on the load to be continuously with a constant vector and corresponding to the maximum power point on the electrical performance curve of the solar cells. An electrical power inverter for the PVPS was designed and implemented using MOSFET transistors as switches for power circuits. The control signals are generated by the microcontroller based on the voltage of the solar cells and the microcontroller signals are enlarged and transferred to the power switches (transistors) while maintaining their shape by enlarging and optocoupler circuits. There are also protection circuits to the PVPS. The PVPS is connected to the computer, allowing the user to easily control it. The research concludes with a list of all the findings and recommendations, as well as a presentation of the future plan.