الفهرس 
Modeling of photovoltaic array
Enhancing of Photovoltaic array’s Performance during partial shadingOnly 14 pages are availabe for public view
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Abstract
The photovoltaic (PV) Power generation has several merits like free fuel cost, little maintenance, cleanness and causing no noise because of the absence of moving parts. The Egyptian government moves towards encouraging the consumer to generate electricity from PV system and issues new electricity law that allows the consumer to sell the superfluous of PV array generated power to utility.
Partial shading is one of the obstacles for propagation of PV array. The photovoltaic (PV) Partial shading may occur by neighbor building, trees, dust, and clouds. The effectiveness of partial shading on the PV array performance are loss in the PV array output power, presence of multiple Maximum power peaks (MPP) that causes difficulty of tracking MPP and global MPP occurred at relative low voltage. All these effects are considered in literature review. Also, a comparative literature review and different methods for mitigating these bad effects are provided.
In this thesis, three techniques for enhancing the characteristic of photovoltaic array under partial shading are suggested:
1. A photovoltaic/battery scheme technique for boosting PV array output power is suggested. This system applied a battery connected in parallel with PV array to substitute the power loss during occurrence of partial shading.
Also, 2.a reconfiguration strategy is suggested that increases PV array output power during partial shading. This reconfiguration strategy used current sensors, controller and electronics switches. The current sensor sense occurrence of partial shading and send signal to controller to control the switches that reconfigure PV array to arrange shaded modules in same column to reduce power loss.
3. The thesis presents a technique for boosting the reconfigurable PV system output power by connecting a battery in parallel with photovoltaic. This improves PV array output power.
The study of the thesis, also covers optimizing of a rooftop PV array output power interconnected to the grid by using a cascaded DC/DC converter across each module.
In this thesis, Matlab/Simulink software package used for executing the analysis. Two models were built up for the study in this thesis:
1. A model for simulation the performance of photovoltaic array during fully illumining conditions and during partial shading.
2. A model for simulation the performance of rooftop PV array connected to grid with cascaded DC/DC converter across each PV module.
Key words: Photovoltaic Array; Partial shading; bypass diode; MATLAB Simulink;
Reconfiguration; Optimization; Cascaded DC/DC converter; on grid Photovoltaic system.