Evaluate real-time system reliability using boundary-based concept for EKPC system

This paper addresses a comprehensive approach to evaluate reliability in a large transmission system for on-line and real-time environments. The paper also addresses the growing need for broader coordination between planning and operations. The paper describes how the boundary-based AC approach was utilized to evaluate the reliability of the EKPC network. The approach described in this paper offers a unique capability to automatically identify the boundary of the secure operating region for each contingency and rank contingencies in on-line and off-line environments. The study also shows how to optimize a transmission system using existing resources without building new transmission. The study was performed using the EKPC loadflow data to validate the proof of concept. It took under 20 minutes to perform AC contingency analysis on over 3,700 N-1 contingencies. The approach described in this paper will allow the operators to perform exhaustive analysis and determine the boundary of stability.