Voltage and Frequency Control for a Self-Excited Induction Generator Using a Three-Phase Four-Wire Electronic Converter

This work proposes a system, based on a self-excited induction generator (SEIG) with a shunt electronic converter, to feed isolated three-phase and single-phase linear or nonlinear loads. The electronic converter is composed by a three-phase four-wire shunt active filter and a DC chopper attached to its DC bus. The converter compensates the current harmonics, the reactive power and the load unbalances at its AC side and dissipates the active power excess through the chopper at its DC side. The designed control architecture assures that, in steady state, the rms values of the voltages and the frequency remain at the their reference values. The simulated results show a good performance of the system under different loading conditions