April 07, 2008 ARC Event

April 07, 2008 ARC Event

Sunday March 30, 2008 from 08:15 EST through 08:35 EST the Midwest ISO invoked the ARC procedure due to a 1,000 MW Net Schedule Interchange obligation change over a ten minute period created by schedule changes. Up to 57 percent of the available ARC operating reserves were utilized during this period to correct the imbalance. There were no ARS events during the ARC procedure.