* 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:
BGE Line derates
on the Five Forks-Rock Ridge #110512 115kV line
Updated 8/31:
The derates below were
removed on 8/30.
Updated 8/26:
The derates will remain in effect through 8/29
3 spans along
the #110512 Ckt from the Rock Ridge terminal to the
Five Forks Terminal have Ground clearance restrictions
Temporary ratings
until 8/29/10
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Beaver Valley
TIE2-7 138kV CB switching
During the outage of the Beaver Valley 3_8 345/138kV Tie transformer (eDart #350093), voltage instability may arise when the JL Furnace plant is burning. To address the voltage instability, Duquesne will open the Beaver Valley “TIE2-7” 138kV bus tie, but only when the Furnace is burning. eDart ticket number #393300 has been entered to reflect the potential need to open this CB. When the CB is opened, the ticket will be listed in the ‘active’ status. When the CB is not opened, the ticket will be in the ‘approved’ status.
Allegheny Power
Temporary 500kV Line Derates
Updated 6/29/10
The Fort Martin - Ronco have been restored to their default limits 6/29/2010
Updated 6/17/10
The Doubs-Pleasant View 500kV line ratings have been restored to their default limits. The Ft.Martin - Ronco derates remain in effect and are on target to be corrected on 6/30/10.
Updated 6/10/10
The Doubs–Pleasant View and Ft. Martin-Ronco 500kV lines have been temporarily derated as indicated below. The derates are expected to remain in effect until 6/18/10 and 6/30/10 respectively.
Reason: Load ability update to address temporary sag limit. Revised to fix calculation error. Permanent Term ticket
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Reason: Load ability update to address temporary sag limit. Permanent Term Ticket
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Wylie
Ridge #2 345/138 kV Transformer Replacement
Updated 8/20/10
The new #2 345/138 kV transformer replacement
has a 6/1/2011 target date.
Wylie
Ridge #5 345/500kV Transformer Failure
Updated 8/20/10
The new #5 transformer will not be delivered
until Fall 2011.
Updated 6/3/10
The revised in-service for the new transformer
is now 6/1/2011.
Updated 5/17/10
On May 5, 2010, the #5 500/345 kV transformer
at Allegheny Power’s Wylie Ridge substation failed. A spare transformer
has been ordered and is expected to be on site and installed during the fall of
2011.
Wylie
Ridge #8 345/500kV Transformer Failure
Updated 8/20/10
The revised in-service date for the new #8
transformer transformer is now 6/1/2011.
Updated 8/16/10
On August 15, 2010, the #8 500/345 kV
transformer at Allegheny Power’s Wylie Ridge substation failed. A spare transformer had been ordered (as
part of the Wylie Ridge #5 transformer replacement above) and is expected to be
on site and installed during the fall of 2011.
Mt
Storm-Pruntytown 500kV Line Outage
Updated 5/3/10
On 5/1/10, the Mt Storm-Pruntytown 500kV line
was removed from service for scheduled work, eDart #373703. While this line is out of service, the
AP South Reactive Interface is not a valid interface. Please disregard the limits and any
violations that may be posted for the AP South Reactive Interface during this
outage.
Bowie
T1 230/115kV Transformer Outage
Updated 3/15/10
On 3/8/10, the Bowie T1 230/115kv transformer
was removed from service for inspection. During that inspection, the PEPCO
engineers determined the transformer showed signs of internal damage to the point where it could not be safely
re-energized. As a result, eDart ticket #395422 has been changed to
“emergency” and extended to 5/1/10 to allow for a new transformer
to be shipped, tested and installed.
As a note, this unplanned outage extension
may have an impact on future scheduled transmission outages in the area. All
outage information updates will be posted to the OASIS “linesout” page as soon as they are available.
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.
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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
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Brandon Shores – Riverside (2344 & 2345) 230kV Circuit Status Update
Updated 8/16/2010
Through the 2010 Summer, 2344 and 2345 circuits will operate at their normal ratings. Remaining repair work on 2344 and 2345 circuits is outlined below.
Fall
2010
· On 9/13/2010 two simultaneous
4-hour outages (one @ Hawkins, one @ Sollers) will be
taken on 2345 to remove cable 2345-2 from service. Circuit 2345 will then
be cut back in with cables 2345-1 and 2345-3 in service and cable 2345-2 out
for repairs. EDART:
410527
· On 10/15/2010 two simultaneous 4-hour outages (one @ Hawkins, one @ Sollers) will be taken on 2345 to put 2345-2 cable back in, followed by a 24-hour outage to perform the electric soak test on circuit 2345. At the end of this 28-hour outage circuit 2345 will be cut back in with all three cables in service. EDART: 410529
During the fall 2010 circuit 2344 will operate as normal with 2344-1 and -2 cables in service.
Spring
2011
· On 3/14/2011 two simultaneous 4-hour outages (one @ Hawkins, one @ Sollers) will be taken on 2345 to remove cable 2345-1 from service. Circuit 2345 will then be cut back in with cables 2345-2 and 2345-3 in service and cable 2345-1 out for repairs. EDART: 410636
· On 4/15/2011 two simultaneous 4-hour outages (one @ Hawkins, one @ Sollers) will be taken on 2345 to put 2345-1 cable back in and take 2345-3 cable out, followed by a 24-hour outage to perform the electric soak test on circuit 2345. At the end of this 28-hour outage circuit 2345 will be cut back in with 2345-1 and 2345-2 cables in service. EDART: 410637
· On 4/18/2011 two simultaneous 4-hour outages (one @ Hawkins, one @ Sollers) will be taken on 2344 to remove cable 2344-1 from service and connect cable 2345-3 to circuit 2344. Circuit 2344 will then be cut back in with cables 2344-2 and 2345-3 in service and cable 2344-1 out for repairs. During this time circuit 2345 will still be in service with cables 2345-1 and 2345-2. EDART: 414980
· On 5/20/2011 two simultaneous 4-hour outages (one @ Hawkins, one @ Sollers) will be taken on 2344 to put cable 2344-1 back in service and remove cable 2345-3 from circuit 2344, followed by a 24-hour outage to perform the electric soak test on circuit 2344. At the end of this 28-hour outage circuit 2344 will then be cut back in with cables 2344-1 and 2344-2 in service. During this time circuit 2345 will still be in service with cables 2345-1 and 2345-2. EDART: 414991
· On 5/21/2011 two simultaneous 4-hour outages (one @ Hawkins, one @ Sollers) will be taken on 2345 to place cable 2345-3 back in service. EDART: 414995
During the summer 2011 both circuits will be operated in normal configuration with two cables 2344-1, 2 on circuit 2344 and three cables 2345-1, 2, 3 on circuit 2345.
Fall
2011
· On 9/18/2011 two simultaneous 4-hour outages (one @ Hawkins, one @ Sollers) will be taken on 2345 to remove 2345-3 cable from service. Circuit 2345 will be cut back in with 2345-1 and 2345-2 cables in service. EDART: 414999
· On 9/19/2011 two simultaneous 4-hour outages (one @ Hawkins, one @ Sollers) will be taken on 2344 to remove cable 2344-2 from service and connect cable 2345-3 to circuit 2344. Circuit 2344 will then be cut back in with cables 2344-1 and 2345-3 in service and cable 2344-2 out for repairs. During this time circuit 2345 will still be in service with cables 2345-1 and 2345-2. EDART: 415002
· On 10/17/2011 two simultaneous 4-hour outages (one @ Hawkins, one @ Sollers) will be taken on 2344 to put cable 2344-2 back in service and remove cable 2345-3 from circuit 2344, followed by a 24-hour outage to perform the electric soak test on circuit 2344. At the end of this 28-hour outage circuit 2344 will then be cut back in with cables 2344-1 and 2344-2 in service. During this time circuit 2345 will still be in service with cables 2345-1 and 2345-2. EDART: 410653
· On 10/18/2011 two simultaneous 4-hour outages (one @ Hawkins, one @ Sollers) will be taken on 2345 to place cable 2345-3 back in service. EDART: 415009
At this point both circuits will be cut back in with normal configuration and all repairs completed.
Updated 6/7/2010
Repair work on 2345-3 cable is taking longer than originally estimated. The return date for the 2345-3 cable has been revised to 6/9/2010.
Summer 2010
Remaining repair work on 2344 and 2345 circuits is outlined below;
Fall 2010
Spring 2011
Fall 2011
eDart information related to the upcoming 2344/2345 circuit outages will be provided at a later date.
Updated 5/19/2010
In April 2010, during the 1st termination replacement, damage was discovered on the riser pipe for the 2345-3 cable. As a result, the risers will be replaced in addition to the terminators on the 2345-3 cable. The 2345-3 cable is expected to be placed back in normal service on May 29, 2010 which will allow 2345 Circuit to operate at full ratings throughout the Summer. Replacement of the remaining terminations will be rescheduled beginning in the Fall 2010. Risers will be examined during the outages and replaced if necessary. During this work, both circuits 2344 and 2345 will be operated using two pipes per cable.
BGE will continue to operate 2345 with a temporary rating of 768 MVA normal and 1150 MVA emergency (at all temperature sets) until the cable is returned to service on May 29, 2010 (expected return date). Both 2344 and 2345 Circuits are expected to operate in their normal configuration with their full rated capability ratings throughout the 2010 Summer.
eDart information related to the upcoming 2344/2345 circuit outages will be provided at a later date.
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.
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.