الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Motivated by economic and environmental concerns, renewable energies become of higher potential to meet the continuous increase of loads. Wind energy is one of the promising sources of renewable energy. Although the merits given by wind energy, the stochastic nature of wind is a big hinder of integrating wind power with utility grids. The wind changes over moments, hours, days, and year seasons. This thesis addresses the dynamic behaviour of a wind-driven induction generator (I.G.) connected to a power system grid through a transmission line. The transient responses of protective devices associated with the I.G. are also studied. A computer simulation of the system under different disturbances is conducted through the well-known matlab simulink. Disturbances considered are due to a variety of faults at the terminals of the generator as well as at the far end of the transmission line where it is connected to the load. Protective relaying strategy is proposed for the induction generator. The behaviour of different relays is studied under different disturbances. This work presents the design and implementation of a versatile digital overcurrent (OC), (OV/UV), (OF/UF) and negative sequence relays using a single microcontroller. The software development and hardware testing are done using a microcomputer module based on an 8- bit microprocessor. The digital processing of measured currents based on the CUSUM method in the programming. This protection provides reasonably fast tripping; even at terminal close to the power source were the most serve faults can occur excluding the transient condition. So this method has an excellent compromise between accuracy hardware and speed.