Electric power systems steady-state security assessment using the rough set theory

In this paper it is proposed an efficient steady-state contingency classification using the rough set theory. The developed methodology produces a classification of the system operating in four possible states: normal, alert, emergency I, and emergency II. The methodology developed by the authors was applied to a test power network and the results obtained were analyzed. Finally, some conclusions that provide a valuable contribution to the understanding of the power system security analysis are pointed out.