  This paper presents the performance of an AC transmission switching (TS)
based real-time contingency analysis (RTCA) tool that is introduced in Part I
of this paper. The approach quickly proposes high quality corrective switching
actions for relief of potential post-contingency network violations. The
approach is confirmed by testing it on actual EMS snapshots of two large-scale
systems, the Electric Reliability Council of Texas (ERCOT) and the Pennsylvania
New Jersey Maryland (PJM) Interconnection; the approach is also tested on data
provided by the Tennessee Valley Authority (TVA). The results show that the
tool effectively reduces post-contingency violations. Fast heuristics are used
along with parallel computing to reduce the computational difficulty of the
problem. The tool is able to handle the PJM system in about five minutes with a
standard desktop computer. Time-domain simulations are performed to check
system stability with corrective transmission switching (CTS). In conclusion,
the paper shows that corrective switching is ripe for industry adoption. CTS
can provide significant reliability benefits that can be translated into
significant cost savings.
