Abstract
We propose stability indexes of power swing oscillation taking nonlinearity into consideration using normal form analysis. For a relatively large oscillation to which eigenanalysis cannot be applied, we approximately describe the effect of nonlinearity up to the third order in the form of the change in oscillation characteristics (damping factor and period) with respect to the change in amplitude. Consequently, we can obtain approximated stability regions of oscillation modes in state space. It is also possible to apply the proposed indexes under auto-parametric resonance condition, when a ratio of eigenvalues is close to a simple whole number. We demonstrate the effectiveness of the proposed indexes by comparing with time-domain simulation results in longitudinal power system models.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
