NOTICE DATE:  July 25, 2011
NOTICE TYPE:  M-A052011-03 NPRR
SHORT DESCRIPTION:  Activation of telemetered ramp rates for NPRR282
INTENDED AUDIENCE:  QSEs with Resources
DAY AFFECTED:  July 25, 2011, 17:30 - 19:30 CDT
LONG DESCRIPTION:  Nodal Protocol Revision Request (NPRR) 282, Dynamic Ramp Rates Use in SCED, requires the use of telemetered ramp rates by the Resource Limit Calculator (RLC) in calculating the Security-Constrained Economic Dispatch (SCED) Up and Down Ramp Rates (SURAMP and SDRAMP). The SURAMP and SDRAMP are then used in the calculation of High Dispatch Limit (HDL) and Low Dispatch Limit (LDL). These telemetered ramp rates will replace the static ramp rates, which are used currently.
In order to meet the July 26, 2011, implementation date for NPRR282, ERCOT will activate the telemetered ramp rates in production between 17:30 and 19:30 CDT today, July 25, 2011. The actual activation time is subject to current Operations conditions. An Operations Hotline call will be made to communicate when the telemetered ramp rates are live.
In the event of suspect or invalid telemetry from a Resource, the current static default values will be used.
ACTION REQUIRED:  Qualified Scheduling Entities (QSEs) should immediately notify their ERCOT Account Manager if the QSE has not completed the necessary dispatch system changes.
ADDITIONAL INFORMATION:  NPRR282 and associated documents can be found on the ERCOT website, under Market Rules, at http://www.ercot.com/mktrules/issues/nprr/276-300/282/index.
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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