Study of Nonlinear Oscillations Due to Exciter Control

The effect of excitation system parameters on power system stability is studied here. The classical swing equation for a power generator augmented with an exciter is shown to undergo a Hopf bifurcation to periodic solutions. Only unstable oscillations occur for realistic parameter values and characterize the attractor of the stable equilibrium point. Attention is focussed on the global behavior of the oscillations as the critical parameter is varied. The analysis is carried out for a single machine connected to an infinite bus case.