Flywheel effect in power plants with an induction frequency converter

This paper proposes the application of the flywheel concept for stabilizing power plants during transients. The energy stored in the rotating masses on the generation side is used to compensate for the power angle oscillation during transients. This flywheel effect is produced by a wound rotor induction machine which is controlled in a way such that a quick phase-shifting operation extends the generator capability to compensate the energy unbalance during faults. Experiments and simulations verify the validity of the proposed approach