Title :
Nonlinear Koopman modes of coupled swing dynamics and coherency identification
Author :
Yoshihiko Susuki;Igor Mezić
Author_Institution :
Department of Mechanical Engineering, University of California, Santa Barbara, 93106-5370, United States
Abstract :
We report modal analysis of coupled swing dynamics of a multi-machine power system. The analysis is based on the so-called Koopman operator, a linear, infinite-dimensional operator that is defined for any nonlinear dynamical system and captures full information of the system. The modal analysis makes it possible to extract single-frequency modes, which are called Koopman modes, embedded in the coupled swing dynamics and to identify a coherent group of generators in which they swing together in frequency and phase.
Keywords :
"Generators","Power system dynamics","Eigenvalues and eigenfunctions","Nonlinear dynamical systems","Mathematical model","Discrete Fourier transforms"
Conference_Titel :
Power and Energy Society General Meeting, 2010 IEEE
Print_ISBN :
978-1-4244-6549-1
DOI :
10.1109/PES.2010.5589363