MODAL ANALYSIS FOR VOLTAGE STABILITY : Application at Base Case and Point of Collapse

Voltage stability has become an important issue to many power systems around the world, the large Brazilian interconnected system being no exception. There is a great interest in the development and application of computational tools and methodologies to voltage stability problems detected in power system planning and operation studies [1-31]. Various methodologies have been proposed in the last decade, together with system models to properly simulate the voltage stability phenomena.

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