الفهرس 
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Abstract
A comparative analysis isintroducedin this thesis among three altered controllers (PI, Fuzzy, and
Fuzzy-PI)for a 9.1 kWgrid-connected scheme. This scheme is designed by using Simulink to test
the recommended controllersunder the theoretical operating conditions for a household-sized PV
(Photovoltaic)system. The currentstudy compares between the three controllers andgoes to select
the better controller for amelioration the performance of the grid-connected system control. The
studydetermines that the Fuzzy-PI controller beats the other controllers regarding the
performancefactorsintermsofdynamicresponse,totalharmonicdistortion,and overshoot and
settlingtime. This is recognized to the fact that the values of thegains (KIandKP) are changed by
theFuzzy-PIbasedon the variations in irradiance andtemperature.
One of the main sources of renewable energy is solar energy (PV system). This means that
transformingthe solar energy intoelectricity is a very essential research topic. Low efficiencyand
high cost are between the imperfections of PV systems. This stimulates scientists to achieve how
toincrease the quality of renewable energy resources. Thecontrol of grid-connected inverter
structures is a very important part of the transformation and transmissionof energy; so,they must
be amelioration to see the loads for grid interconnection. The research thesispresents a design and
the hardware implementation of aFuzzy-PI which is an intelligent controller for theinverter
controller to minimize the inverter total harmonic distortion and synchronize with the grid. First,
the research thesis explains the Simulinkdesignof thethree-phaseFuzzy-PI controller.Next,this
thesisdiscussesaMatlabGUIimplementedtodesignanygrid connectedinverterthatisusefulinsizingPVsystems.Thethesisfinallydiscussesthe
generationcodeoftheFuzzyPIcontrollerfromtheMatlabSimulinkModel,thehardwarecomponents,andthehardwareimplementa
tion
of the system in the lab experiment. A 70 Wprototype is used in the hardware
implementation, to test the study controller, trying to be as nearer as possible to reality devoid
oftaking major dangers or getting into security apprehensions in case of doing experiments on the
systems of high power. 70 W prototype systemsprove that the controller prototypical could be
directly transformed fromSimulink to the control scheme. It also proves that the Fuzzy-PI
controller is working correctly usingthe 70 Wprototypes. Once this is established, the idea can be
applied to commercial systemswith proper funding. The results prove the effectiveness of the
proposed Fuzzy-PI controller inachieving good performance and efficiency in hardware. The
proposed methodology does notrequisite complex programming code. A Matlab coder is
recommended to convert the Simulink controllerinto a C code which can be used in hardware
implementation. The hardware outcomes show that therecommended methodology works and
getstherequired C Code which is the essential conclusion. The Fuzzy-PI controller of the threephase
grid-connected inverter can be applied by usinglow-costconfigurablemicrocontrollers
astheresults show inthelab.