Fig. 13

Synchronization analysis (RPV time histories and PLV variation) post Hopf point at preset angles. (a) \(\alpha _{pre}(^\circ )\) = \(0^\circ\) , (b) \(\alpha _{pre}(^\circ )\) = \(5^\circ\), (c) \(\alpha _{pre}(^\circ )\) = \(10^\circ\), (d) \(\alpha _{pre}(^\circ )\) = \(15^\circ\) and frequency ratio (\(\overline{\omega }\) = 0.67).