الفهرس 
PREFACEOnly 14 pages are availabe for public view
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Abstract
With the increased presence of wind energy in the electric power system, many utilities now have grid code requirements specific to wind turbines. Low voltage ride-through (L VR T) is one such requirement, where turbines have to stay connected to the grid for typical faults on the transmission systems. Solutions have been proposed for wind turbines equipped with doubly fed induction generators (DFIG). This thesis is a contribution to a comparative assessment of the respective performance of three L VRT solutions. This assessment is made in reference to representative existing grid codes. The DFIGs are placed in an electric power system in MATLAB SIMULINK Demo which is subjected to a series of faults of various types, durations, and severities. The wind farm input wind speed is also varied to change the DFIGs operating conditions. The performance of each method is evaluated based on the DFIG response, such as rotor current and dc bus voltage, and on the wind farm response, such as power generation, terminal voltage and output current.
Comparisons between various methods have been represented in this thesis and recommendations on using a various methods are illustrated in the conclusion. Simulation analysis verified the ability of various methods to ride-through the fault conditions.
A novel method is discussed in this thesis to increase the performance response of the wind farm in fault conditions.