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].
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