NOTICE DATE:  September 14, 2009
NOTICE TYPE:  M-B091409-01 Operations
SHORT DESCRIPTION:  Configuration change for San Angelo Power Station (SAPS) and SAN ANGELO RED CREEK (SARC)
INTENDED AUDIENCE:  ERCOT Market Participants
DAY AFFECTED:  September 16, 2009
LONG DESCRIPTION:  This Notice is to inform the market of implementation of a congestion related equipment status change. This configuration change is for the San Angelo Power Station (SAPS) and SAN ANGELO RED CREEK (SARC) stations. This equipment change will be effective on Wednesday, September 16, 2009.
The bus will be split at SAPS so that the Shrew Tap, Pave Paws SWTECH and Ben Ficklin lines are connected to one bus. The breakers connecting bus SAPS14 and SAPS24 will be opened. The San Angelo South Tap, San Angelo Southland Hills and the Schkade lines and the 138 kV to 69 kV autotransformer at SAPS will be connected to bus SAPS14. Additionally at SARC, the Ben Ficklin to Ballinger line will be isolated from other 138 kV lines and the 138 kV to 345 kV autotransformers at SARC.
AEP worked with ERCOT outage coordination to relocate the 138 kV to 69 kV autotransformer at SAPS and has recently completed the work and proposed the splitting of the buses at SAPS. ERCOT studied this proposal and has no reliability concern with the proposal. The benefit of the split is that it will isolate the SAPS Shrew line from the 345 kV system at Twin Butte and this should reduce congestion on the SAPS to Shrew and Shrew to Menard lines. This split was discussed at the May 28, 2009, Congestion Management Working Group (CMWG) meeting. For additional information, the SAPS-Menard presentation can be reviewed at http://www.ercot.com/calendar/2009/05/20090528-CMWG.
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/>.


ap