(a) Corridor1: PQ Plot 700.0000 Corridor1: PQ Operating [MVAR] 600.0000 500.0000 467 400.0000 300.0000 726 200.0000 400.0 600.0 [MW] 800.0 (b) figure 6. (a) A real-time bus and corridor monitoring display deployed at PG&E and (b) a real-time reactive margin indication after a contingency. powerful control devices, robust communication systems, and well-engineered algorithms to deliver actionable information for real-time operation and data into contingency analysis tools. the entities undertaking synchrophasor deployment recognize the importance of data exchange to enable a true wide-area situational awareness. there are requirements that must be explored with any network design around data exchange architectures, including bandwidth management, network access, 24 ieee power & energy magazine data security reliability, and redundancy. Figure 9 is a simplified diagram reflecting a utility with independent data centers and independent physical and electronic security parameters (PsPs and esPs, respectively) exchanging data with the rc. in this architecture, data from each utility data center is transmitted to the rc's primary and alternate sites. the overall management of the wide-area network (wan) may be a third-party carrier specializing in high reliability september/october 2015