Abstract
This work presents a theoretical-experimental study in permanent regime of the three-phase induction generator of squirrel cage connected directly to the distribution network at fixed speed. With the expansion of distributed generation, the three-phase induction machine operating as a generator becomes a viable option for cost reduction in the implementation or expansion of power generation. The experimental test was performed in a laboratory with a 1-cv squirrel cage induction motor, connecting in the electrical network through a transformer. When the motor is driven above the synchronous speed (1800 rpm) by means of a primary mover it acts as a generator. The induction generator with squirrel cage has great robustness, requires no maintenance in the excitation system, nor synchronization system for use in distributed generation and is cheaper in front of the synchronous generator. The induction generator does not need a synchronization system because it is sufficient to set it as the empty motor and accelerate it to about 5% of the synchronous speed to operate as a generator.
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