Nonlinear Koopman modes and coherency for multimachine power systems

摘要

We perform modal analysis of nonlinear swing dynamics of multimachine power systems using the so-called Koopman operator. Modes derived through spectral analysis of the Koopman operator, called Koopman modes, provide a nonlinear extension of linear oscillatory modes and a technique for identification of coherent generators using finite-time data of swing dynamics.