الفهرس 
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Abstract
Photovoltaic (PV) solar energy is categorized as one of the renewable energies. PV has a great potential compared to its counterparts of renewable energies. PV makes use of the most abundant energy on earth, which is generated by the sunlight. This is promising in countries where sunlight is available all year round, for example Egypt. The most important benefit of the solar energy systems is the decrease of environmental pollution. This is achieved by the reduction of air emissions due to the substitutions of electricity and conventional fuels. The two basic types of PV applications are the stand-alone and the grid connected systems. Stand-alone PV system is used in area that is not easily accessible or has no access to mains electricity or utility grid. Grid connected PV system is tied directly with the utility grid. This work presents a grid connected PV (GCPV) power plant to produce a clean electrical energy. The typical GCPV system would consist of the PV modules (array), the control unit; the inverter that should be has an on-grid facility and the transformer.
The maximum power point tracking (MPPT) of this GCPV power plant is controlled by using the incremental conductance and integral regulator (CR), the fuzzy logic control (FLC) and a proposed combination of CR and FLC methods through the PWM unit and the DC-DC boost converter. These methods of control are used to generate value of the duty cycle (D) to be as input for the PWM unit. After that the PWM unit generates pulses to control on/off time of the IGBT switch of the DC-DC boost converter. Finally, this DC-DC boost converter will be responsible for adjust MPPT of the GCPV power plant.
The proposed control method collects both merits of CR and FLC methods. Whereas the CR is simple and wide method used for controlling MPPT of PV system also, the FLC method provides accurate fast response, high performance and maximum efficiency. Therefore, the combination of these two controllers together would improve MPPT and performance of this GCPV power plant, especially with existing fluctuated solar irradiation and electrical noise or fault at certain temperature. For comparative evaluation, the response of this GCPV power plant with applying of the proposed combination of CR and FLC is compared to the responses of it with applying each of them separately. The control methods are evaluated through the simulation of a case study of 100 KWp GCPV power plant. All parts of the GCPV power plant are simulated using Matlab/Simulink.