NOTICE DATE:  March 6, 2009
NOTICE TYPE:  M-A030609-01 Notice of System Change (PRR)
SHORT DESCRIPTION:  PRR 794 Implementation - Provision of Meteorological Data from WGRs
INTENDED AUDIENCE:  Resource Entities with Wind-powered Generation Resources and QSEs
DAY AFFECTED:  April 1, 2009

LONG DESCRIPTION:  PRR 794 was approved by the ERCOT Board of Directors on February 17, 2009.  This PRR requires the following site-specific meteorological data be sent to ERCOT for each Wind-powered Generation Resource (WGR):



*       Wind speed

*       Wind direction

*       Temperature

*       Barometric pressure


A Wind-powered Generation Resource (WGR) Entity shall provide site-specific meteorological information to ERCOT through its QSE selected for this purpose.  The WGR shall be responsible for any associated compliance metrics.  ERCOT shall establish procedures specifying the accuracy requirements of WGR meteorological information telemetry (Section 6.5.1.1(8)).

Until the PRR's effective date of April 1, 2009, ERCOT will continue to update the MP-21 nodal metric status on the Nodal Readiness Center website to reflect Resource Entities' provision of the meteorological data (http://scorecard.ercot.com/).  After April 1, 2009, MP-21 will be discontinued and compliance will be under zonal protocol rules and procedures.

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 e-mail at [log in to unmask]<mailto:[log in to unmask]>.

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sg