NOTICE DATE:  May 18, 2009
NOTICE TYPE:  W-A051809-01 PRR
SHORT DESCRIPTION:  Update on Implementation Details of PRR803, Revised Implementation Approach for PRR 601
INTENDED AUDIENCE:  QSEs and Resource Entities
DAY AFFECTED:  July 1, 2009

LONG DESCRIPTION:  PRR803 is changing the ramping period for Balancing Energy Service deployment for Base Power Schedule Calculation and Balancing Energy Power Schedule from ten (10) minutes to fourteen (14) minutes. This change is designed to provide more efficient dispatch and to allow the deployment of more Balancing Energy Services.

QSEs may test their systems prior to implementation of PRR803 to ensure compatibility with the new fourteen (14) minute ramping period, however, testing is not required. The attached document (PRR803 - 14 Minute Ramp Rate Testing Approach Overview) outlines the testing options and the scheduling process. The testing period is July 1, 2009 through September 30, 2009. Regardless of whether system testing is performed, all QSEs will be required to submit documentation demonstrating that their systems are compliant with PRR803 prior to the proposed implementation date of October 29, 2009.
ACTION REQUIRED:  To schedule a systems test, QSEs should contact their ERCOT Wholesale Account Manager. The QSEs will be responsible for making any necessary arrangements with their Resource Entities.
PLEASE REPLY TO THIS NOTICE with the following information:

 1.  Comments on the Testing Approach Overview document.
 2.  A statement as to whether you will be able to comply with the change by the proposed implementation date. If you cannot meet the proposed implementation date, provide the date that you will be able to comply with the PRR.
 3.  A description of remaining work that is necessary to effect compliance.
Please reply to [log in to unmask]<mailto:[log in to unmask]>.
ADDITIONAL INFORMATION:  See attachment (PRR803 - 14 Minute Ramp Rate Testing Approach Overview)
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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