NOTICE DATE:  May 8, 2012
NOTICE TYPE:  M-A040612-03 NPRR
SHORT DESCRIPTION:  REMINDER - Implementation details of NPRR434
INTENDED AUDIENCE:  ERCOT Market Participants
DAY AFFECTED:  Operating Day May 10, 2012
LONG DESCRIPTION:  Effective starting on Operating Day May 10, 2012, ERCOT will implement Nodal Protocol Revision Request (NPRR) 434, Increase the Capacity Limitation of a Generation Resource Providing RRS, which was approved by the ERCOT Board on February 21, 2012.
NPRR434 increases the maximum amount of Responsive Reserve (RRS) that can be provided by a Generation Resource from 20% to 24% of its High Sustained Limit (HSL).
The Day-Ahead Market results on May 9, 2012, for Operating Day May 10, 2012, will reflect the increased RRS percentage.
ADDITIONAL INFORMATION:  NPRR434 and associated documents can be found on the ERCOT website, under Market Rules, at http://www.ercot.com/mktrules/issues/nprr/426-450/434/index.
Information on upcoming releases can be found on the ERCOT Multi Year Project Priority List (PPL) at http://www.ercot.com/services/projects/.
CONTACT:  If you have any questions, please contact your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via email at [log in to unmask]<mailto:[log in to unmask]>.
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