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Oncor Electric Delivery Company LLC Transmission Construction Clearance Optimization June 25, 2010 Tod Whitley & Jen Fiegel ERCOT Reliability Operations.

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Presentation on theme: "Oncor Electric Delivery Company LLC Transmission Construction Clearance Optimization June 25, 2010 Tod Whitley & Jen Fiegel ERCOT Reliability Operations."— Presentation transcript:

1 Oncor Electric Delivery Company LLC Transmission Construction Clearance Optimization June 25, 2010 Tod Whitley & Jen Fiegel ERCOT Reliability Operations Subcommittee Meeting

2 1 Oncor Electric Delivery Company LLC Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 Whats Inside / Coming Attractions Planning Phase Design Phase Execution Phase Q&A

3 2 Oncor Electric Delivery Company LLC Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 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

4 3 Oncor Electric Delivery Company LLC Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 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

5 4 Oncor Electric Delivery Company LLC Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 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

6 5 Oncor Electric Delivery Company LLC Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 Station G Station S GT Station W (Coop) Station SS (Coop) Station SST XXXX Coop 69kV 138kV Station WBSE Station GAT Station GE (Other) Removable jumper TJ-XXX XXX AS xxx AS XXX XXXX AS XXX N.O. AS XXX LDB xxx AS xxx AS XXX Sta SLM LDS 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 N.O. XXX xxx Sta P 69kV Rev 10 3/30/10

7 6 Oncor Electric Delivery Company LLC Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 XXXX 69kV 138kV TJ-XXX XXX AS xxx XXXX 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 GT Station GE (Other) Station GAT Station WBSE Sta SLM Sta P Coop

8 7 Oncor Electric Delivery Company LLC Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 xxxx 69kV 138kV TJ-xxx xxx AS xxx xxxx 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 GT Station GE (Other) Station GAT Station WBSE Sta SLM Sta P Coop

9 8 Oncor Electric Delivery Company LLC Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 xxxx 69kV 138kV TJ-xxx xxx AS xxx xxxx AS xxx LDB xxx AS xxx LDS xxxx LD xxxx LDS xxxx Black – Energized Green – De-energized Red – New Blue - Remove September (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 GT Station GE (Other) Station GAT Station WBSE Sta SLM Sta P Coop

10 9 Oncor Electric Delivery Company LLC Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 xxxx 69kV 138kV Remove temporary jumper TJ-xxx xxx AS xxx xxxx AS xxx LDB 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 GT Station GE (Other) Station GAT Station WBSE Sta SLM Sta P Coop

11 10 Oncor Electric Delivery Company LLC Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 xxxx 69kV 138kV Temporary Jumper TJ-xxx (removed) AS xxx xxxx 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 GT Station GE (Other) Station GAT Station WBSE Sta SLM Sta P Coop

12 11 Oncor Electric Delivery Company LLC Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 xxxx 69kV 138kV TJ-xxx AS xxx xxxx 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 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 GT Station GE (Other) Station GAT Station WBSE Sta SLM Sta P Coop

13 12 Oncor Electric Delivery Company LLC Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 xxxx 69kV 138kV Replace TJ-xxx FID xxx AS xxx xxxx 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 November (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 GT Station GE (Other) Station GAT Station WBSE Sta SLM Sta P Coop

14 13 Oncor Electric Delivery Company LLC Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 GT (138kV) xxxx 69kV 138kV AS xxx xxxx 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 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 WBSE Sta SLM Sta P Coop

15 14 Oncor Electric Delivery Company LLC Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 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 TSPs directly to discuss clearances in detail Check 90 day weather forecast Check load forecast Request Load flow studies

16 15 Oncor Electric Delivery Company LLC Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 Design Phase Permitting requirements TXDOT, NTTA, etc. Railroads Utilities City FAA

17 16 Oncor Electric Delivery Company LLC Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 Transmission Outage Application (TOA)

18 17 Oncor Electric Delivery Company LLC Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010

19 18 Oncor Electric Delivery Company LLC Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 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)

20 19 Oncor Electric Delivery Company LLC Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010

21 20 Oncor Electric Delivery Company LLC Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010

22 21 Oncor Electric Delivery Company LLC Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010

23 22 Oncor Electric Delivery Company LLC Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010

24 23 Oncor Electric Delivery Company LLC Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010

25 24 Oncor Electric Delivery Company LLC Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010

26 25 Oncor Electric Delivery Company LLC Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 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 TSPs 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

27 26 Oncor Electric Delivery Company LLC Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 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

28 27 Oncor Electric Delivery Company LLC Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010

29 28 Oncor Electric Delivery Company LLC Tod Whitley & Jen Fiegel ERCOT ROS Presentation 06/25/2010 Q & A


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