NOTICE DATE:  August 27, 2009
NOTICE TYPE:  M-A082709-01 Operations
SHORT DESCRIPTION:  Proposal to disable the Macedonia SPS
INTENDED AUDIENCE:  ERCOT Market Participants
DAY AFFECTED:  August 20, 2009
LONG DESCRIPTION:  ERCOT has received a request to permanently disable the Special Protection System (SPS) at Macedonia. This SPS is intended to open the 138 kV transmission tie line between the Lower Colorado River Authority (LCRA) Transmission Services Corporation (TSC) and CenterPoint Energy at the Macedonia substation when specific contingencies cause overloads on the Waller-Macedonia line due to large North to Houston power transfers. This SPS would be disabled due to a recent upgrade to the line. The owner of the SPS believes it can be permanently disabled and ERCOT is currently reviewing this proposal.
Further details of the Macedonia SPS can be found in the "Special Protection Systems Information" section of the ERCOT Planning and Operations Information secure website:  http://planning.ercot.com/login/login.
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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