Integrating the SIME method with standard time domain simulation software to search for transient stability limits

The single machine infinite bus equivalent (SIME) method provides a means of estimating transient stability margins and for accelerating the search for transient stability limits for multi-machine power systems. This paper presents the SIME algorithm, with particular focus on how it may be integrated with a standard time domain simulation program to search for stability limits. Novel enhancements aimed at increasing the robustness of the SIME algorithm are proposed. The enhanced algorithm is applied to search for the critical clearing time (CCT). The binary-search method is compared with the hybrid binary-SIME method in the search for CCTs.