Project 2007-12
Frequency Response

Related Files

Status: 
BAL-003-1 was posted for a parallel 45-day formal comment period and initial ballot and non-binding poll through December 9, 2011.  The initial ballot failed to achieve a two-thirds industry approval.  The SDT is reviewing comments received during the initial ballot and modifying the standard and associated documents.  The proposed standard is scheduled to be posted for a parallel 30-day comment and 10-day ballot beginning February 21, 2012.  

Purpose/Industry Need:
Frequency Response, a measure of an Interconnection’s ability to stabilize frequency immediately following the sudden loss of generation or load, is a critical component to the reliable operation of the bulk power system, particularly during disturbances and restoration.  The proposed standard’s intent is to collect data needed to accurately model existing Frequency Response.  There is evidence of continuing decline in Frequency Response in the three Interconnections over the past 10 years, but no confirmed reason for the apparent decline.  The proposed standard requires entities to provide data so that Frequency Response in each of the Interconnections can be modeled, and the reasons for the decline in Frequency Response can be identified.  Once the reasons for the decline in Frequency Response are confirmed, requirements can be written to control Frequency Response to within defined reliability parameters.