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An ATC Operations Engineer was using synchrophasor data to review fault operations and stumbled across the odd voltage signature shown below from a PMU monitoring one of our 69 Kv substations. One of the three voltage phases would “drift” away from the other two phase voltages and then eventually...

We have observed significant sustained voltage oscillations on the ATC transmission system that were not visible in our SCADA data. These oscillations are normally in the 0.6 – 0.75 Hz range and are lightly damped. They can persist for weeks and then disappear for weeks and even months.

PMU versus SCADA Video Events Summary. The Control Room Solutions Task Team [CRSTT] would like to thank Kevin Chen, Lupe Garcia, and Jim Dyer at EPG for their efforts to pull together these videos.

CRSTT Use Case Document