This paper presents features and applications of an interactive graphical PC (DOS based) software package for the comprehension of transient stability using the equal area criterion method. The software is specifically useful for senior level undergraduate and first year graduate students in power system analysis courses. Utility engineers working with large-scale power systems can learn some basic concepts of transient stability by simulating the single machine infinite bus power system. A distinctive feature of this package is the user-friendly method for problem definition. Problems are defined by selecting options from menus without typical editor-like entry approach, used in other mathematical software, which normally have their own strict syntax.
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