SELECTIVE MODAL ANALYSIS IN POWER SYSTEMS.

A promising new framework for analyzing and reducing the large, linear, time-invariant dynamic models used to study the dynamic stability of power systems is investigated. The framework is termed Selective Modal Analysis or SMA, and it goes beyond traditional modal analysis methods in ways that appear crucial to successful practical use of modal methods in both on-line and off-line studies. Comparisons with existing approaches to the Dynamic Stability problem are made, and the distinctive features of SMA are brought out. SMA provides tools for identifying system variables that are most significant in constructing selected system modes.