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Demand Response Semi Annual Report

Demand Response Semi Annual Report. FERC Filing - December 31, 2003 http://www.iso-ne.com/FERC/filings/Index_Y2003.html. Background. February 25, 2003 FERC issues order directing ISO-NE to file status reports on its Demand Response programs every six months. First report filed June 30 2003.

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Demand Response Semi Annual Report

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  1. Demand Response Semi Annual Report FERC Filing - December 31, 2003 http://www.iso-ne.com/FERC/filings/Index_Y2003.html

  2. Background • February 25, 2003 FERC issues order directing ISO-NE to file status reports on its Demand Response programs every six months. • First report filed June 30 2003. • The report should include the following information: • Customer enrollment for each program and potential MW reduction. • Total load reductions achieved per program per event. • ISO-NE system load at time of curtailments • Total MW reduced and payment for reductions. • The effects of demand response on wholesale prices.

  3. Current Enrollment – December 1, 2003

  4. Demand Response(as of December 31, 2003)

  5. Enrollment (12/01/03) • Total of 340 MW enrolled in program as of December 1, 2003 • Over 43% of MW located in CT zone • Maine and NEMA zones follow with 22 and 20 percent respectively. • In terms of number of assets: • CT leads with 28 percent of the ready to respond assets • Followed by NEMA (26 percent) and WCMA (21 percent) • Therefore, implies that assets in CT, in the program, are (on average) larger than in the other zones. • Comment on market potential in other zones and market strategy.

  6. Events in Reporting Period (6/01/03 – 11/30/2003) • Price Response events declared on 36 days (with 38 separate events) for a total of 377 hours. • 58% or 22 of the Price Response events occurred in the autumn months(September, October, November). • 50% of the events (19) occurred exclusively in CT in the autumn. • Considering all six months of the reporting period – 74% of the events (28) occurred exclusively in CT. • The data shows that although a large number of events might be expected during the summer, the Price Response program was activated more frequently in October and November.

  7. Load Reductions and Payment Information

  8. Load Reductions and Payment Information

  9. Load Reductions and Payment Information

  10. Effects of DR on Wholesale Prices • Price Response events occurred in 377 hours and the Demand Response events were activated for 62 hours for a total of 439 hours. • ISO analyzed those hours during which there was an interruption of 10 MW or more. • There were 227 instances of interruptions of 10 MW or more. • The following table presents summary information of the estimated impact of interruptions of 10 MW or greater. • In every case – either there was no impact (0%) or there was a positive impact implying that had the interruption not occurred the LMP would have been higher.

  11. Effects of DR on Wholesale Prices

  12. Effects of DR on Wholesale Prices • All of the instances with interruptions of 10 MW or more took place either in the NEMA zone or in the Connecticut zone. • Of the 227 instances only 42 cases occurred in the NEMA zone. 40 cases had no effect on wholesale prices. • The CT zone accounted for 185 of the 227 instances (81 percent). • 11 of the 227 (4.8 percent) instances pertain to hours on August 15 2003. In two instances there was a significant impact on prices. (1) Ranked 7th with an estimated impact of 18 percent. (2) Ranked 31st with an estimated impact of 6.6 percent. The largest MW interruption occurred in this case- with an interruption of 109 MW.

  13. Effects of DR on Wholesale Prices

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