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Induction-generator-based system providing regulated voltage with constant frequency

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2 Author(s)
Marra, E.G. ; Sch. of Electr. Eng., Fed. Univ. of Goias, Goiania, Brazil ; Pomilio, J.A.

The electrical characteristics of an isolated induction-generator-based system are improved through the association with a voltage-source pulsewidth modulation (PWM) inverter. The electronic converter allows the achievement of a better system behavior in many aspects: voltage regulation, frequency stabilization, and reactive power compensation. The system operation strategy consists of maintaining constant synchronous frequency at the induction generator via an association with a PWM inverter. The system power balance and the generator voltage regulation may be accomplished by two different means: through the rotor speed regulation, or by sending part of the energy stored in the inverter DC side to the grid through a single-phase line, in case the rotor speed is not regulated and a single-phase grid connection is available. The obtained results demonstrated the system is stable, robust, and an effective source of regulated three-phase voltages

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Industrial Electronics, IEEE Transactions on  (Volume:47 ,  Issue: 4 )