Dynamics and system bifurcation in autonomous induction generators

An autonomous induction generator has limited output power capability, the limit of which is determined by the values of the rotor speed, per-phase shunt excitation capacitor and the load. For self-excitation to be sustained, certain minimum airgap flux linkage and load impedance are required. This paper sets forth, using concepts of bifurcation theory, how these limits are affected by system parameters. The dynamic voltage collapse phenomena arising from loading the generator above the attainable maximum load or changing the load impedance to a lower than critical value and the process of self-excitation are also investigated. Theoretical analyses are supported by experimental results