Induction-generator-based system providing regulated voltage with constantfrequency

The electrical characteristics of an isolated induction-generator-based sys tem are improved through the association with a voltage-source pulsewidth m odulation (PWM) inverter. The electronic converter allows the achievement o f a better system behavior in many aspects: voltage regulation, frequency s tabilization, and reactive power compensation. The system operation strateg y consists of maintaining constant synchronous frequency at the induction g enerator via an association with a PWM inverter. The system power balance a nd the generator voltage regulation may be accomplished by two different me ans: through the rotor speed regulation, or by sending part of the energy s tored in the inverter de side to the grid through a single-phase line, in c ase 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.