DRR Type I
DRR Type II
Real Time Demand Response
Real Time Emergency Response
Day-Ahead Demand Response
Demand Side Ancillary Services
Emergency Demand Response
Targeted Demand Response
Installed Capacity - Special Case Resources
Ec o n o mic
2009 State of the Market Report
Table 5: Comparison of DR Programs Across RTOs. 2009
Quantity in MW
Pct of Resource Mix 6.8%
Type I capacity for Planning Year 2010 is only 210 MW due to certain pumped storage resources no longer
offering their capacity when pumping as Type I (effective September 1, 2009). As of February 2010, Type I resources can also offer spinning reserves, subject to a 10 percent participation cap.
Notes: Non-Midwest ISO resources are not all mutually exclusive. Due to various operating characteristics of each program or resource, specific program-to-program comparisons are not readily feasible.
Sources: Midwest ISO; The Brattle Group, “Demand Response in the Midwest ISO: An Evaluation of Wholesale Market Design”, January 29, 2010.
Improving DR Integration in Midwest ISO Market
The Midwest ISO has made significant efforts to reduce the barriers to integrating DR resources into existing markets. As the quantities of DR resources increase, one can expect that they will be deployed much more frequently to satisfy peak loads and respond to system contingencies. Therefore, it will be increasingly important to ensure that the real-time markets produce efficient prices and other market outcomes when DR resources are deployed.