الفهرس 
Wind Turbines Generators and TopologiesOnly 14 pages are availabe for public view
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Abstract
As the energy demand and green house gases emission is increasing day by
day the popularity or renewable energy system is also increased. wind power
generation is considered as one of the most promising applications of renewable
energy generation. Multiple types of AC generators are being used with wind
turbine systems. However, The variable-speed multi-pole PMSG has many
advantages including a gearless construction, an elimination of the excitation system, full controllability for grid interface and extracting maximum wind power and simplicity in accomplishing fault ride through and grid support.
In this thesis, modeling and simulation of grid-connected-PMSG is
investigated. To study the power system performance under different
disturbances, the simulation of the system is carried out under MATLAB SIMLINK environment. A control system is provided using proportional-integral
(PI) controllers as conventional control system type. Also, fuzzy logic controllers (FLCs) are designed to enhance the system performance. The simulation results are obtained in a comparative form using both control strategy under different
disturbances such as 3-phase short circuit, one line outage and variation of wind speed. Also, to maximize the use of wind energy, a MPPT is designed by using perturb and observe technique. It concluded from the simulation results that the proposed FLC scheme is more effective for enhancing the stability of wind farms
connected to grid during temporary network disturbances and randomly
fluctuating wind speed compared with conventional PI controllers. The result
presented a better understanding of the real behavior and highlights the features of controlling PMSGs in order to get better utilization of wind energy resources in the near future.