Importance of dynamic stability phenomena in power system planning

This paper examines the role of stability analysis in planning studies for North American power systems. The uses of stability analysis are explored, and the types of issues raised by these analyses are discussed. Such issues include first-swing instability, undamped oscillations, cascading by relay action, system integrity protection scheme (SIPS) performance, and islanding performance. Recent examples of each of these phenomena are presented along with possible approaches for addressing them in a planning time horizon. The importance of accurate models and benchmarking of models to actual system behavior is also shown.