BIFURCATIONS ASSOCIATED WITH SUB-SYNCHRONOUS RESONANCE

This paper describes a set of results of detecting nonlinear phenomena appearing in a turbine generator power system with series-capacitor c ompensation. The analysis was based on the Floquet theory as well as t he Hopf Bifurcation theorem. After the first Hopf bifurcation, the sta ble limit cycle bifurcates to a stable torus and an unstable limit cyc le which connects to a stable limit cycle by a supercritical torus bif urcation. The stable limit cycle joins with an unstable limit cycle at a cyclic fold bifurcation. This unstable limit cycle is connected to the second Hopf. It has been also numerically demonstrated that such a strange sequence of periodic orbits is created by a q-axis damper win ding.