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Date: | Wed, 18 Feb 2009 16:43:41 -0600 |
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NOTICE DATE: February 18, 2009
NOTICE TYPE: M-A021809-01 Operations
SHORT DESCRIPTION: Changes to ERCOT Ancillary Services Methodology Approved by the Board
INTENDED AUDIENCE: ERCOT Market Participants
DAY AFFECTED: March 1, 2009
LONG DESCRIPTION: On February 17, 2009, the ERCOT Board of Directors (Board) approved the new ERCOT Methodologies for Determining Ancillary Service (AS) Requirements document for 2009. The two affected Ancillary Services are Non-Spin Reserve Service (NSRS) and Responsive Reserve Service (RRS).
The change made to NSRS allows for procurement of NSRS into four blocks for the operating day instead of 2 blocks for on-peak and off-peak hours. This recommendation was part of the effort to optimize the purchase of NSRS and was approved by TAC.
The change made to RRS involves Load Acting as A Resource (LaaR) participation in RRS. LaaRs will be allowed to provide up to 50% of RRS for procurements of RRS that range from 2300 MW to 2800 MW. This change was recommended by ROS and approved by TAC and was based upon the results of a Dynamics Working Group.
The methodologies described in the document will be used to calculate the AS requirements starting March 1, 2009.
ADDITIONAL INFORMATION: Please refer to the following link under Item 06 for the approved document and other supporting documentation:
http://www.ercot.com/calendar/2009/02/20090217-BOD
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]>.
If you are receiving e-mail from an ERCOT distribution list that you no longer wish to receive, please follow this link in order to unsubscribe from this list: http://lists.ercot.com<http://lists.ercot.com/>.
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