Nonlinear oscillations caused by periodic disturbance between inter-area power systems

TitleNonlinear oscillations caused by periodic disturbance between inter-area power systems
Publication TypeConference Paper
Year of Publication2008
AuthorsMao, D. T., P. Zhang, H. A. Rahman, and J. R. Marti
Conference NameElectric Power Conference, 2008. EPEC 2008. IEEE Canada
Pagination1 -5
Date Publishedoct.
Keywordsbifurcation, bifurcation phenomena, chaos, chaotic oscillation, inter-area oscillation, Poincare mapping, Poincare section method, power system disturbance, power system faults, power system interconnection, power system stability, power system transient stability, signal sampling, transient chaos detection, two-machine equivalent model

Understanding the mechanism of inter-area oscillation is an important problem in power system stability research. In this paper, by introducing periodic disturbance, we propose a new mechanism to model inter-area oscillation caused, which promises new direction in this field. As a proof of our idea, a two-machine equivalent model based representation of two interconnected power systems was used. Chaos and bifurcation phenomena have been detected in the system by using a special Poincare section method that considers long-term characteristics of the sampled signal. Based on simulation study of the proposed model, inter-area oscillation evolving from period doubling bifurcation to chaos can be unfolded as the disturbance parameter increases. Our simulation results show three oscillation patterns; those are intermittent oscillation, transient chaos and chaotic oscillation. These results can give new ideas to interpret abnormal oscillating phenomena that happen in real power systems.


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