الفهرس 
Chapter 1 IntroductionOnly 14 pages are availabe for public view
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Abstract
The demand of energy in the world is steadily increased. Therefore, new and renewable energy sources must be found to meet the increasing future requirements. One of the most promising types of renewable energy sources is the photovoltaic (PV) solar energy. PV power generation is becoming increasingly important as a renewable energy resource because it offers many advantages such as reliability, availability, no fuel costs, no pollution, requires little maintenance and no noise, safety, and inexhaustible.
The PV modules are connected to the utility grid through a converter to extract maximum power from PV module, and to inject a sinusoidal current into the grid. Generally, there are two types of grid-connected PV systems, those with galvanic isolation and without galvanic isolation. Galvanic isolation can be implemented with either a line-frequency transformer (LFT) or a high-frequency transformer (HFT). By contrast, topologies without galvanic isolation are transformerless topologies.
This thesis aims to design a new topology for grid-tied PV applications that utilize high-frequency transformer for galvanic isolation. in addition, the thesis aims to develop a reliable digital control system for grid connected PV inverters, coping with varying grid conditions and existing problems, for interfacing the inverter with the grid. The thesis targets the digital implementation of maximum power point tracking (MPPT) technique, increasing the inverter output voltage level, galvanic isolation, providing high reliability, safety, small size and light weight prototype. The proposed topology has been validated by implementing a prototype and providing analytical simulation results.