Extended factors for linear contingency analysis

This paper presents preliminary results on three new tools to quickly assess the impact of line outages and reclosure on generators. The first deals with the estimation of the angle across the breaker of an opened line. The second deals with the estimation of the immediate currents that arise in generators in response to a line outage. The third deals with the estimation of the immediate currents that arise in generators in response to a line closure. The first would be used to determine if a reclosing relay might block a reclosure. The second would be used to determine if a line outage might damage a generator. The third would be used to determine if the override of a blocked reclosure might be allowable. The concepts are illustrated on test cases.

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