News Article
August 29, 2013

Demand Response: Shedding Light On Performance

The North American Electric Reliability Corporation created the Demand Response Availability Data System (DADS) to evaluate the performance of demand response programs being used to stabilize the grid or reduce high wholesale energy prices.


From summer 2011 through summer 2012, NERC collected data on demand response events dispatched by grid operators, and the actual reduction of load or provision of ancillary services. The database represents the first mandatory reporting of comprehensive demand response program information. Among the key observations:


  • Demand response is a growing resource being deployed onto the grid: in 2011 the mean reduction sought by the grid approached 24,000 MW and grew to nearly 39,000 MW in the summer of 2012.

  • When demand reduction was sought, the summertime demand response programs successfully provided 78 percent of the MW requested, even with the significant increase in the reductions sought by the grid. 

  • Increased numbers of individual demand response events did not necessarily correlate with decreased performance or participation by the participants in the programs: there was a moderate-to-strong positive correlation between more events and greater demand reduction. 

  • Increased demand response event duration may have led to decreased demand response realization.


This and future phases of DADS research will help complete the picture of the benefits being achieved through demand response.

Read the full report: Demand Response Performance An Analysis of Demand Resource Participation

Fig 1.  NERC Reliability Regions

Fig1. NERC Reliability Regions

August 2013


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