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Group Properties in Power Systems

In this paper, the concept of a group of coherent contingencies is formulated and demonstrated. These group properties include static and dynamic group properties. A scheme for identifying groups of coherent contingencies from a large contingency list is also developed. Numerical examples are presented to illustrate groups of coherent contingencies and the associated group properties. These group properties can have a variety of practical applications; in particular, they can be explored and incorporated into the development of power system analysis, computation and control.