Transient stability margin prediction using equal-area criterion

The authors present an extension of the equal-area criterion for multimachine systems and applies it to the determination of the transient stability margin (TSM) of critically disturbed machines, for a given contingency, for real-time applications. This can be considered as a continuation of the transient stability assessment which normally does not report the TSM quantitatively. The method has been tested on several standard test systems and the obtained results are compared with the benchmark results. The simulation results show that the method can provide reliable, precise, and quick information about the transient stability margin of a power system