Inter-area mode transient stability estimation

Inter-area mode transient stability evaluation of large interconnected power systems has proved to be difficult because of the complexity of the phenomena and the long time duration over which instability manifests itself. Very few studies have been published and this paper describes a new method which is reliable for this complex problem, fast and accurate in its evaluation of critical clearing time, provides an estimate of transient energy margin and has some potential for control evaluation. The technique is a hybrid between the detailed multimachine representation, the single-machine equivalent and energy methods. It has been tested on three standard test systems including the IEEE 50-generator system.

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