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ERCOT News Release (8-4-2011):
Level 2 emergency cancelled; interruptible loads restored

August 4, 2011

NEWS RELEASE: Electric Reliability Council of Texas

Level 2 emergency cancelled; interruptible loads restored

Austin, Aug. 4, 2011 -- The Electric Reliability Council of Texas, Inc. (ERCOT), system operator for the state’s bulk transmission grid, canceled the level 2 emergency at 6:07 p.m., and interruptible loads are restored. The level 1 emergency will stay in place until the operating reserves return to higher than 2500 megawatts (MW).  (NOTE: At 6:50 p.m., ERCOT cancelled the level 1 emergency.)  

Peak demand was 66,815 MW between 4 and 5 p.m. today – lower than yesterday’s record-high demand since approximately 1,500 MW of load resources and emergency interruptible service resources were dropped as part of the level 2 emergency procedures.

"Electricity demand for Friday is expected to be lower than today, but we are still asking consumers and businesses to conserve through tomorrow due to the unusually high demand and the increased risk of generation outages during these type of conditions," said Kent Saathoff, vice president of system planning and operations. "As stated before, we are very appreciative of the businesses and consumers who have been reducing their electricity consumption 3-7 p.m. this week."

Wind generation contributed approximately 1,400 MW during the peak hour.

Approximately 5,000 MW of generation was unavailable today due to forced outages and de-ratings – units unable to run at their peak capacity – compared to about 4,700 MW on Wednesday.

ERCOT was importing 1,033 MW of generation from other grids today via direct current ties, including 288 MW which was procured under emergency protocols from Southwest Power Pool in the Eastern interconnection (58 MW) and from Comisión Federal de Electricidad in Mexico (230 MW).


Feb. 2 EEA 1-3*

March 23 EEA 1

June 27 EEA 1

Aug. 2 EEA 1

Aug. 3 EEA 1

Aug. 4 EEA 1-2

* Feb. 2 was the third time since 1989 that level 3 rotating outages were used. Previous events were Dec. 22, 1989 and April 17, 2006.



2,400 MW of capacity registered, based on max capacity

190 individual Load Resources from 50 different companies throughout the state

Load Resource participation in responsive reserve service is capped at 50 percent of the RRS capacity which is normally 2,300 MW

Typically averages ~1,100 MW for any given hour

Paid at the market clearing price for that responsive reserve service, the same as generators

* Interruptible loads service; does not include Emergency Interruptible Load Service, approximately 400-500 MW.



ERCOT news releases

Energy Emergency Alerts

Conservation Tips

The Electric Reliability Council of Texas, Inc., (ERCOT) manages the flow of electric power to approximately 23 million Texas customers – representing 85 percent of the state's electric load and 75 percent of the Texas land area. As the Independent System Operator for the region, ERCOT schedules power on an electric grid that connects 40,500 miles of transmission lines and more than 550 generation units. ERCOT also manages financial settlement for the competitive wholesale bulk-power market and administers customer switching for 6.6 million Texans in competitive choice areas. ERCOT is a membership-based 501(c)(4) nonprofit corporation, governed by a board of directors and subject to oversight by the Public Utility Commission of Texas and the Texas Legislature.

ERCOT Media Contact: Dottie Roark, 512-225-7024; droark@ercot.com



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