* The Conditions Impacting Transmission page is manually updated on an as needed basis to post “Special Notices” for conditions within the PJM footprint that may impact the capability to deliver power across the transmission system. Posting will remain on this page for a period of one year.
Special Notices:
Rating
Changes to ComEd 345 kV Facility
Updated 8/3/2009
As a result of an engineering field analysis survery performed by Commonwealth Edison Company (ComEd), the ratings of the 345kV line 8012 between 80 Pontiac and 112 Wilton Center have been increased as follows:
Ticket ID: 251561
Reason: Procedure/calculation method change- Ratings change result of engineering field analysis survey.
|
Changing Percentage |
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Updated 7/30/2009
During a recent review by Commonwealth Edison Company (ComEd) staff of the 345kV line 8012 between 80 Pontiac and 112 Wilton Center, it was determined that 10 spans are required to be re-tensioned, resulting in a reduction to thermal ratings. This reduction is expected to be in effect until line repairs can be implemented, but no later than June 1, 2010.
TERM Ticket ID: 251146
Reason: Procedure/Calculation
change- 10 spans of 345kV L8012 is being re-tensioned. As a result of this
action, new ratings have been submitted by ComEd
Planning-07/27/09.
This is temporary ticket from
7/27/09 – 6/01/10
|
Changing Percentage |
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Brandon Shores – Riverside (2344 & 2345) 230kV Circuit Status Update
Updated 2/3/2010
Baltimore Gas & Electric (BGE) is continuing to analyze the operation of the Brandon Shores to Riverside 2344 and 2345 circuits.
In April 2009, BGE identified concerns with the condition of the oil in these oil-filled pipe cables that are underwater in the Baltimore Harbor. Gas testing confirmed a high level of dissolved gas indicative of arcing, and additional samples and tests confirmed that initial analysis.
In April and October, 2009, BGE took emergency outages on 2344 and 2345 respectively to “degasify” the oil in the cables. While a single source of the arcing was not clearly identified, BGE is moving forward with a project to replace the 2344 and 2345 cable terminations, which are likely contributors to the dissolved gas.
BGE will replace the pothead terminations of 2344 and 2345 over the course of several outages planned from March 29 through May 28, 2010. From March 29 through May 28, BGE will operate 2345 with a temporary rating of 768 MVA normal and 1150 MVA emergency (at all temperature sets).
BGE plans to continue to perform additional testing leading up to the pothead termination replacements.
The following BGE outages to replace the cable terminations are submitted via eDart:
Start Date
Stop Date
eDart #
Transmission Facility Outage
3/29/10 @ 05:30 3/29/10 @
18:30
381814
Brandon Shores – Riverside 230kV (2345) Circuit
4/5/10 @ 05:30
4/6/10 @ 12:30
381816
Brandon Shores – Riverside 230kV (2345) Circuit
4/9/10 @ 05:30
4/9/10 @ 12:30
395441
Brandon Shores – Riverside 230kV (2345) Circuit
4/12/10 @ 05:00 4/13/10 @
12:30
395442
Brandon Shores – Riverside 230kV (2345) Circuit
4/21/10 @ 05:30 4/21/10 @
12:30
395447
Brandon Shores – Riverside 230kV (2345) Circuit
4/29/10 @ 05:30 4/30/10 @
12:30
382026
Brandon Shores – Riverside 230kV (2345) Circuit
5/3/10 @ 05:30
5/3/10 @ 13:00
391305
Brandon Shores – Riverside 230kV (2345) Circuit
5/4/10 @ 05:30
5/4/10 @ 12:30
382027
Brandon Shores – Riverside 230kV (2344) Circuit
5/12/10 @ 05:30 5/13/10 @
12:30
382029
Brandon Shores – Riverside 230kV (2344) Circuit
5/16/10 @ 05:30 5/16/10 @
12:30
382031
Brandon Shores – Riverside 230kV (2344) Circuit
5/24/10 @ 05:30 5/25/10 @
12:30
394648
Brandon Shores – Riverside 230kV (2344) Circuit
5/28/10 @ 06:00 5/28/10 @
18:00
393419
Brandon Shores – Riverside 230kV (2344) Circuit
The
in service date for the Bath County Special Protection Scheme (SPS) is targeted
for April 22, 2009. The SPS is designed to control loading on the
Cloverdale - Lexington 500kV facility when Bath County is pumping. The
SPS scheme will immediately trip 1 or 2 pumps when a transmission contingency
causes overloading of the 500 kV line between AEP Cloverdale Substation and
Dominion Transmission Lexington Substation. The focus of the SPS is on
protection of two AEP autotransformer banks at Cloverdale from sustained
operation above emergency rating in this circumstance. The SPS has received
Regional Reliability Organization approval and has been presented at the PJM
Committee Structure as outlined in the PJM Transmission Operations Manual
(M03), Section 1 - Transmission Operations Requirements. The scheme was
presented to the PJM Committee structure as
follows: PJM System Operations Subcommittee 9/10/08, PJM Planning
Committee 9/17/08, PJM Operating Committee 9/16/08, PJM Market Implementation
Committee 9/11/08, and PJM Markets and Reliability Committee 9/24/08.
PJM
– NYISO Interface Capability
Updated
3/13/09
Updated
3/17/09
The
PJM-NYISO Interface Capability will be limited by NYISO planned outages on
March 24, 2009 - April 17, 2009 (refer to the NYISO OASIS for outages scheduled
and corresponding TTC reduction information).
AEP Cook
Transformer Outage Information
Updated 2/17/2009
This notification is to provide information on the impact of a transmission outage, in addition to other expected system conditions, on the AEP-MECS interface in April 2009. Starting on April 1 2009, AEP will be taking an outage of the Cook 765/345 kV transformer and the Cook 345 kV bus for an upgrade under PJM eDart #233128. The bus outage sets up a potential contingency where the loss of the Cook-Benton Harbor 345 kV line will also remove the Cook-Palisades 345 kV from service. The outage was jointly studied by PJM and MISO for reliability and for determining the power transfer capability through the AEP-MECS interface.
The study concluded that due to first contingency thermal or voltage violation criteria, the power transfer through the AEP-MECS interface may be restricted to approximately 2200 MW. To maintain reliability, the flow on the AEP-MECS interface and on the Argenta-Twin Branch 345 kV tie line will be limited in order to not exceed first contingency thermal or voltage limits for the duration of the outage. In addition, the study identified critical generators and necessary capacity in the region to facilitate the outage.
PJM and MISO Planning & Operations will continue to
assess other planned and unplanned outages in the region for impact.
Rating
Changes to AP 500 kV Facilities
Updated 12/16/08
During a recent review by Allegheny Power (AP) of their thermal ratings, an error was identified in a database table of component ratings for a 2 conductor bundle of 2032.1 ACSR. A review of historical databases identified that the error had occurred when AP joined PJM. At that time, the emergency ratings changed from 6 hours to 4 hours, and also the quantity and range of ambient operating temperature sets was revised. The error affected the 4-hour emergency and Load Dump ratings for 2-2032.1 ACSR.
As a result of this review, effective 2/2/2009, AP will be changing the ratings of some of their 500 kV facilities. These rating changes can be viewed at:
PJM
– NYISO Interface Capability
Updated
The
PJM-NYISO Interface Capability will be limited by NYISO planned outages (refer
to NYISO OASIS for outage schedule information). The TTC will be reduced from 2500MW to
1200MW for the duration of their scheduled work.
Bedington – Black
Oak interface disabled
Updated
During
the scheduled outage of the Bedington-
New
Transformer at Conastone (BC)
Updated
Upon
completion of eDART ticket # 213462 (scheduled from
Mt
Storm 500kV Circuit Breaker Monitoring
Updated
On
AP
South Reactive Transfer Interface Redefinition
Updated
PJM has performed an evaluation of the current definition of the AP South
Interface. The analysis indicated that certain units in western Dominion and
southeastern
FUTURE
ORCHARD/
Updated
At the start of outage request #232608 this Fall, the existing Orchard-East Windsor “5038” 500kV line will be permanently cut and will no longer exist in the current configuration.
As of
COMED
345 KV
Updated
The
Updated
Recent forced outages in the ComEd transmission system coupled with heavy West – East transfers have resulted in increased congestion in the ComEd and NIPSCO systems. With the common tower lines of East Frankfort – Crete 345kV and East Frankfort – University Park 345kV forced out of service due to storm damage, during heavy transfers from West – East through ComEd, thermal constraints have been encountered in ComEd & NIPSCO, for which off-cost operations have been required.
BGE RATINGS CHANGES
Updated 6/18/08
The information previously posted here has been moved and can be linked directly from the http://www.pjm.com/markets-and-operations/etools/oasis/system-information/~/media/etools/oasis/20080501-bge-ratings-changes-for-june-1-2008.ashx page. This was moved due to size.
EAST WINDSOR TRANSFORMER
Updated
The
Update –
The
On
Update
Work was completed under eDART #237768 and the
Update
Due to a revised work plan, FE East has submitted eDart
ticket #237768 scheduled for 2/25-2/29. This outage replaces eDart ticket #230048, which has now been
‘cancelled’. Upon completion of eDart
#237768, the
Update 2/11/08
Upon completion of eDart ticket #230048, the ratings
of the East Towanda #3 230/115kV transformer will increase ~50% for all
temperature sets. However, an additional transmission outage will be required
to return the Transformer to its pre-July 2007 ratings. This second outage has
not yet been scheduled.
Update 1/15/07
On Thursday 1/10/07, the Operating Committee waived the 90-Day waiting
period defined in
In early July of 2007, FE East discovered the
TRANSMISSION OUTAGE CHANGES REPORT
The previously posted “Outages
Impacting ATC” posting has been removed from this page. A list of Outage changes
impacting the Monthly ATC posting can be found at the following link: “ftp://ftp.pjm.com/pub/oasis/outage_changes_report.txt”.
This file can also be accessed from the “ATC Information” section
of the PJM OASIS.