Fast Fault Screening Approach to Assessing Transient Stability in Entergy´s Power System

This paper addresses a fast process for performing transient stability studies in a large transmission system. The paper describes how the most severe three-phase fault locations were identified in Entergy´s power system network. The approach described in this paper offers a unique capability to automatically identify the most severe fault locations and perform ranking of these most severe faults in on-line and off-line environments. The study was performed using the Entergy loadflow and dynamic data to validate the proof of concept. It took approximately one minute to determine and rank 23 most severe fault locations in Entergy´s power system. The fast fault screening (FFS) capability described in this paper will allow the operators to assess transient (angular) stability in on-line and real-time environments.