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Reliability Monitoring: The High-Tech Eye In the Sky

How reliability performance monitoring and standards compliance will be achieved in real time.

Fortnightly Magazine - January 2007

the lights on.”


The work described in this report was coordinated by the Consortium for Electric Reliability Technology Solutions and was funded by the Office of Electricity Delivery and Energy Reliability, Transmission Reliability Program of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.



1. The founding members of CERTS include four national laboratories (Lawrence Berkeley, Oak Ridge, Pacific Northwest, and Sandia), a National Science Foundation Industry/University Research Center consisting of 13 major universities, called the Power Systems Engineering Research Center and the Electric Power Group. See http://certs. .

2. Area Control Error (ACE) is a real-time control measure that measures the balance between load and generation for each control area. An ACE of 0 MW is the control target for each control area. Achieving this target means that the control area is contributing proportionately toward maintaining the frequency of the interconnection at a reliable 60 Hz.

3. For more information on the Eastern Interconnection Phasor Project see