الفهرس 
Title: Control of a grid connected solar system using fractional order pid based on evolutionary computational techniques
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Abstract
This thesis presents a new control type using ”fractional order PID” (FOPID) in voltage regulation grid-connected PV system. FOPID controller is a natural extension of PID controller that used widely in industrial applications. The FOPID system is able to balance harmonic components and reactive power generated by the loads connected to the system. This thesis discusses the tuning and implementation of FOPID in industrial applications. A program has been developed to implement this controller in voltage regulation PV system The optimization algorithms has been presented to tune the parameters of FOPID to obtain the desired response with application in simulation program (MATLAB). Several comparisons between the FOPID/FOPI with the classical PID/PI controllers show that the proposed control strategy improves the efficiency of the system by decreasing the total harmonic distortion of the injected current to the grid and increases the robustness of the system against changes. So simply, it can be said that FOPI and PI controllers have been successfully implemented and show a relative improvement in the output response