NOTICE
DATE: July
1, 2008
NOTICE
TYPE: W-A070108-01 Operations
CLASSIFICATION:
Public
SHORT
DESCRIPTION: ERCOT will implement the addition of two
CREs on Operating Day July 3, 2008.
INTENDED
AUDIENCE: QSEs
DAY
AFFECTED: July 3, 2008
LONG
DESCRIPTION: Protocol Section 7.2.3, Determining
Closely Related Elements (CREs), provides that ERCOT staff may propose
modifications to the list of CREs and shall present modifications to TAC for
approval; if TAC takes no action within seven days, the proposed modification
shall be deemed approved.
On June 26, 2008,
ERCOT proposed modifications to the list of CREs to TAC. TAC took no action on the proposed CRE
modifications; therefore, ERCOT will implement the addition of two CREs
consisting of a combination of several lines for system stability purposes as of Operating Day
July 3, 2008:
1.
West –
North Transfer Stability Limit consisting of the sum of flows on the
following six lines:
LONG CREEK SWITCHING STATION – GRAHAM SES
(345kV, double circuit)
TONKAWA SWITCH – GRAHAM SES
(345kV)
BOWMAN SWITCH – GRAHAM SES
(345kV)
BOWMAN SWITCH – JACKSBORO SWITCHING
(345kV)
SAN ANGELO
CREEK – COMANCHE SWITCH TU (345kV)
2.
Houston Voltage Stability Limit
consisting of the sum of flows on the following four lines from North –
Houston:
JEWETT to TH WHARTON
(345kV)
JEWETT to TOMBALL
(345kV)
GIBBONS CREEK to O’BRIEN
(345kV)
ROANS
PRAIRIE to KUYKENDAHL (345kV)
When either of
these are binding elements, ERCOT will do the following:
ADDITIONAL
INFORMATION: The ERCOT proposal to TAC for the CRE
modifications is posted as Agenda
Item 9 on the June 26 TAC meeting
page at http://www.ercot.com/calendar/2008/06/20080626-TAC.
ERCOT will post
additional details of the stability study results used to establish these limits
to the secure Planning and Operations Information website at http://planning.ercot.com/login/login. This website is scheduled to be
activated on July 7, 2008.
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].
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.
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