Oncor Electric Delivery Company LLC Transmission Construction Clearance Optimization June 25, 2010 Tod Whitley & Jen Fiegel ERCOT Reliability Operations Subcommittee Meeting
Mar 28, 2015
Oncor Electric Delivery Company LLC
Transmission Construction Clearance Optimization
June 25, 2010Tod Whitley & Jen FiegelERCOTReliability OperationsSubcommittee Meeting
Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 2Oncor Electric Delivery Company LLC
What’s Inside / Coming Attractions
Planning Phase
Design Phase
Execution Phase
Q&A
Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 3Oncor Electric Delivery Company LLC
Planning Phase
Engineering design for minimizing future clearance / outage
Two construction seasons (clearance driven)
Pre-engineering meeting
Access plan / ROW
Unit pricing versus time & material
Environmental
Endangered species
USACE property permitting / remediation approval
Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 4Oncor Electric Delivery Company LLC
Design Phase
Create work sequence drawings
Mobile bypass / line bypass
Coordinate with Distribution for load transfer options
Continuous vs daily clearance
Identify work that can be done without equipment clearance
Coordinate Oncor / Contractor work under same clearance. Ex: line rebuild, terminal upgrade
Coordinate with City / Municipality events director
Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 5Oncor Electric Delivery Company LLC
Conversion of Station G to 138kV operation WA#XXXXXXXX
Convert Station G from 69kV to 138kV operation
Relocate existing GT from 69kV P-G line
Construct new GT on the 138kV P-G line
Build 1 mile of new 138kV line
Coordinate conversion of Coop Sta SS from 69kV to 138kV operation
Rev 10 3/30/10
Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 6Oncor Electric Delivery Company LLC
Station G
Station S
GT
Station W (Coop)
Station SS (Coop)
Station SST
XXXXCoop
69kV
138kV
Station WBSE
Station GATStation GE
(Other)
Removable jumper TJ-XXX
XXX
AS xxxAS XXX
XXXXXXXX
AS XXX
N.O. AS XXX
LDB xxx
AS xxx
AS XXX
Sta SLMLDS xxxx
LD xxxx
LDS xxxx
Tie to Station G
Tie to Station SS
Tie to Station W
Black – Energized
Green – De-energized
Red – New
Blue - Remove
April 1, 2010
Initial configuration after Coop has completed new feeder out of Station W
(Final configuration is on the last page)
xxx xxx
N.O. XXX
xxx
Sta P
69kV
Rev 10 3/30/10
Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 7Oncor Electric Delivery Company LLC
XXXX
69kV
138kV
TJ-XXX
XXX
AS xxxAS xxx
XXXXXXXX
AS XXX
LDB xxx
AS xxx
LDS xxxx
LD xxxx
LDS xxxx
Black – Energized
Green – De-energized
Red – New
Blue - Remove
September 7-27
Begin setting tangent poles in green field area
xxx
N.O. xxx
xxx
69kV
N.O. AS xxx
AS XXX
Rev 10 3/30/10
Station W (Coop)
Tie to Station G
Tie to Station SS
Tie to Station W
Station G
Station SS (Coop)
Station SST
Station S
GTStation GE
(Other)Station GAT
Station WBSESta SLM
Sta P
Coop
Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 8Oncor Electric Delivery Company LLC
xxxx
69kV
138kV
TJ-xxx
xxx
AS xxxAS xxx
xxxxxxxx
AS xxx
LDB xxx
AS xxx
LDS xxxx
LD xxxx
LDS xxxx
Black – Energized
Green – De-energized
Red – New
Blue - Remove
April 20 (morning)
•De-energize feed to Sta G and Sta SS for 2 hours
•Set anchor bolt cage for anchor bolted foundation for structure 1/10
•Place 69kV tap back in service after cage has been set
1/10
xxx
N.O. xxx
xxx
69kV
N.O. AS xxx
AS xxx
Rev 10 3/30/10
Station W (Coop)
Tie to Station G
Tie to Station SS
Tie to Station W
Station G
Station SS (Coop)
Station SST
Station S
GTStation GE
(Other)Station GAT
Station WBSESta SLM
Sta P
Coop
Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 9Oncor Electric Delivery Company LLC
xxxx
69kV
138kV
TJ-xxx
xxx
AS xxxAS xxx
xxxxxxxx
AS xxx
LDB xxx
AS xxx
LDS xxxx
LD xxxx
LDS xxxx
Black – Energized
Green – De-energized
Red – New
Blue - Remove
September 27-30 (4 days)
•Line clearance on 138kV to install anchor bolt foundations for new switch structure
•Set three pole dead-end
1/10
New switch structure foundation
xxx
N.O. xxx
xxx
Three pole dead-end
69kV
N.O. AS xxx
AS xxx
Rev 10 3/30/10
Station W (Coop)
Tie to Station G
Tie to Station SS
Tie to Station W
Station G
Station SS (Coop)
Station SST
Station S
GTStation GE
(Other)Station GAT
Station WBSESta SLM
Sta P
Coop
Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 10Oncor Electric Delivery Company LLC
xxxx
69kV
138kV
Remove temporary jumper TJ-xxx
xxx
AS xxxAS xxx
xxxxxxxx
AS xxx
LDB xxx
AS xxx
AS xxx
LDS xxxx
LD xxxx
LDS xxxx
Black – Energized
Green – De-energized
Red – New
Blue - Remove
November 3 (morning)
•Transfer all load at Sta G to Sta Sta WBSE
•Coop to transfer all load off of Sta G and Sta SS
•Take 69kV line clearance to remove TJ-xxx
•Remove high side jumper at Sta S (permanent)
•Remove and decommission AS xxx at Sta G (permanent)
•Asset Commission and NOMCR
xxx
N.O. xxx
xxx
69kV
N.O. AS xxx
Remove and decommission AS xxx
Rev 10 3/30/10
Station W (Coop)
Tie to Station G
Tie to Station SS
Tie to Station W
Station G
Station SS (Coop)
Station SST
Station S
GTStation GE
(Other)Station GAT
Station WBSESta SLM
Sta P
Coop
Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 11Oncor Electric Delivery Company LLC
xxxx
69kV
138kV
Temporary Jumper TJ-xxx
(removed)
AS xxxAS xxx
xxxxxxxx
AS xxx
LDB xxx
AS xxx
LDS xxxx
LD xxxx
LDS xxxx
Black – Energized
Green – De-energized
Red – New
Blue - Remove
November 3 (afternoon)
•Place 69kV line back in service with Sta G isolated for conversion work to begin.
xxx
N.O. xxx
xxx
69kV
N.O. AS xxx
Rev 10 3/30/10
Station W (Coop)
Tie to Station G
Tie to Station SS
Tie to Station W
Station G
Station SS (Coop)
Station SST
GTStation GE
(Other)Station GAT
Station WBSESta SLM
Sta P
Coop
Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 12Oncor Electric Delivery Company LLC
xxxx
69kV
138kV
TJ-xxx
AS xxxAS xxx
xxxxxxxx
AS xxx
LDB xxx
AS xxx
LDS xxxx
LD xxxx
LDS xxxx
Black – Energized
Green – De-energized
Red – New
Blue - Remove
November 8-11 (4 days)
•Line clearance on 138kV to install switch structure and switches.
•Put 138kV line normal
•Asset Commission and NOMCR
xxx
N.O. xxx
xxx
N.O.LDS xxxx
LS xxxx
LS xxxx
69kV
N.O. AS xxx
Rev 10 3/30/10
Station W (Coop)
Tie to Station G
Tie to Station SS
Tie to Station W
Station G
Station SS (Coop)
Station SST
GTStation GE
(Other)Station GAT
Station WBSESta SLM
Sta P
Coop
Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 13Oncor Electric Delivery Company LLC
xxxx
69kV
138kV
Replace TJ-xxx
FID xxx
AS xxxAS xxx
xxxxxxxx
AS xxx
LDB xxx
AS xxx
LDS xxxx
LD xxxx
LDS xxxx
Black – Energized
Green – De-energized
Red – New
Blue - Remove
xxx
N.O. xxx
xxx
LS xxxx
LS xxxx
November 12-17 (6 days)
•Take 69kV line clearance to set 1/9, 1/10, 2/1, set new wood H-frame, pull rope, pull conductor, replace TJ-xxx
•Remove existing 69kV switches at existing tap
•Remove wood structures at existing tap
•Complete the demolition Sta S
•Asset Commission and NOMCR
138kV
N.O. AS xxx
N.O.
LDS xxxx
Rev 10 3/30/10
Station W (Coop)
Tie to Station G
Tie to Station SS
Tie to Station W
Station G
Station SS (Coop)
Station SST
GTStation GE
(Other)Station GAT
Station WBSESta SLM
Sta P
Coop
Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 14Oncor Electric Delivery Company LLC
GT (138kV)
xxxx
69kV
138kV
AS xxx
xxxxxxxx
LDB xxx
AS xxx
LDS xxxx
LD xxxx
LDS xxxx
Black – Energized
Green – De-energized
Red – New
Blue - Remove
xxx
N.O. xxx
xxx
LS xxxx
LS xxxx
November 17, 2010
Final configuration after tap has been relocated and converted to 138kV operation
xxx
FID xxx
138kV
N.O.
LDS xxxx
Rev 10 3/30/10
Station W (Coop)
Tie to Station G
Tie to Station SS
Tie to Station W
Station G
Station SS (Coop)
Station SST
Station GE (Other)Station GAT
Station WBSESta SLM
Sta P
Coop
Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 15Oncor Electric Delivery Company LLC
Design Phase
Nodal Market / Network Operations Model Change Request (NOMCR)
Pared down version of work sequence submitted
Clearance Requests
Submission of data for ERCOT model
Clearance request (Transmission Outage Application)
– Clearance Coordinators do the following:
• Access ERCOT Outage Scheduler (Generator schedules)
• Access ERCOT Outage Scheduler for other Transmission Service Providers’ schedules
• Contact TSP’s directly to discuss clearances in detail
• Check 90 day weather forecast
• Check load forecast
• Request Load flow studies
Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 16Oncor Electric Delivery Company LLC
Design Phase
Permitting requirements
TXDOT, NTTA, etc.
Railroads
Utilities
City
FAA
Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 17Oncor Electric Delivery Company LLC
Transmission Outage Application (TOA)
Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 18Oncor Electric Delivery Company LLC
Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 19Oncor Electric Delivery Company LLC
Execution Phase
Pre-construction meetings
On-site Field Construction Coordinator
Material availability monitoring
Phasing diagrams
Night work
Manpower amplification
Weather conditions (helicopters / bulldozers, skids, mats)
Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 20Oncor Electric Delivery Company LLC
Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 21Oncor Electric Delivery Company LLC
Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 22Oncor Electric Delivery Company LLC
Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 23Oncor Electric Delivery Company LLC
Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 24Oncor Electric Delivery Company LLC
Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 25Oncor Electric Delivery Company LLC
Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 26Oncor Electric Delivery Company LLC
Summary Engineering Design / Constructability
Permitting
Detailed work sequence drawings
ID work not requiring a clearance
Coordination of work under one clearance
Access ERCOT Outage Scheduler (Generator schedules)
Access ERCOT Outage Scheduler for other Transmission Service Providers’ schedules
Contact TSP’s directly to discuss clearances in detail
Check 90 day weather forecast
Check load forecast
Request Load flow studies
Material monitoring
Manpower
Weather condition mitigation methods
Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 27Oncor Electric Delivery Company LLC
Special Considerations For CREZ Projects
CREZ Program Management Office to manage projects through the completion
Transmission Service Providers coordination of routes, substation termination and system protection
–Coordinate schedules including clearances
Schedules including Planned Outage Schedules published on PUC Webtool
–Monthly monitoring of project schedule
Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 28Oncor Electric Delivery Company LLC
Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 29Oncor Electric Delivery Company LLC
Q & A