Application of perturbation method to the analysis of low frequency inter-area oscillations

摘要

This paper presents some advances on the development of perturbation methods for the analysis of inter-area oscillations in complex power Systems. A nonlinear model of the power system that includes the representation of second-order effects is proposed. Based on this representation, the normal forms of vector fields are used to analyse non-linear modal interaction under stressed operating conditions. The procedures developed are tested on a practical 46-machine, 191 -bus test system.