Transient stability performance quantification method for power system applications

In order to assess the reliability of power systems, System Planners must conduct both steady-state and stability simulations. The transient stability simulation of the reliability studies usually involve extensive variations and thus generate large amounts of data. Conventional analysis methods include visual examination of the simulation data plots to classify the severity of disturbances, objectively decide to apply the logical relationships between criteria. This paper, presents a quantification method for power system performance to achieve a more efficient stability analysis assessment. By using a criteria function matrix and a logic matrix, the proposed method evaluates the performance of each contingency and dispatch numerically and gives the overall stability assessment result. Damping and voltage sag criteria functions are applied for identification of the worst fault. This method will free engineers from tedious, time consuming and error-susceptible offline visual analysis and yield significantly more objective and quantified results.