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Abstract With the renewed interest in wind as alternative energy source for isolated wind energy system applications, development of suitable isolated power power generators driven by wind energy, has assumed greater importance. Self excited induction generators can be advantageous over conventional synchronous generators due to its reduce unit cost, ruggedness and cause of maintainance.Furthermore the self excitation characteristic cause the voltage to collapse rapidly if the machine is overloaded. The thesis introduce a new method of approach to the steady state analysis of self excited induction generator working at variable speed and feeding isolated loads. The analysis is complicated due to the magnetic saturation in the machine and generator will supply power at variable frequency. The Newton-Raphson technique was used to predict the steady state performance of self excited induction generators. The solution is obtained either for constant voltage operation or for constant value of the ratio of voltage / speed. Aschem to control reactive power in order to maintain the voltage constant at the generator b terminals was obtained. This is achieved by employing a thyristor controlled inductor. A mathematical model is described and used to reduce the transient performance of the self excited induction generator when connected to an infinite bus- bar. The theory is also extended to include the transient build up of voltage. The transient response with voltage control by using thyristor controlled reactor is examined. A digital computer program based on the Runga-Kutta-Merson method for simulating the two-axed model of the system has been developed. In order to be able to judge the validity of the theoretical analysis, a number of experiments were conducted. |