Adequacy Gap
Adequacy Gap Index

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Energy Emergency Events are called by system operators when demand exceeds available supply on the system. While the significant drop in EEA level 1 and 3 events between 2007 and 2008 is promising, a slight rise in EEA level 2 events shows work remains to be done. More than 50% of level three EEA’s called in 2007 and 2008 were due to Transmission Loading Relief level 5a or 5b declarations, when firm load interruption was imminent or in progress.

The current definition for Category A2 includes the operation of demand-side resources as a capacity and emergency event, while current industry practice includes the resource as part of normal, non-emergency operations. The categories for capacity and emergency events based on Standard EOP-002-2, therefore, require revision to account for higher use of demand response as a capacity and ancillary resource.