Platte Valley Voltage Transformation Venture.


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Develop ~3 miles of new 69-kV line from East Morrill tap to Wildcat. ... Develop another 10 mile 69-kV line in the middle of Wildcat and Sievers Rural to sidestep Mitchell range. ...
Transcripts
Slide 1

Platte Valley Voltage Conversion Project Customer Meeting April 28, 2010 Torrington, WY

Slide 2

Agenda Introductions Accomplishments Update on Torrington Area PVVC Overview PVVC Schedule and Cost Estimates Questions/Comments Wrap Up

Slide 3

Accomplishments since 2003 Whiterock Substation (2005) Lingle Tap (2003) Lyman-Yoder Tap (2005) McGrew range Caps (2005) Stored versatile transformer at Guernsey Rural (2004) Wood Pole Testing and Treatment (2003 & 2004) Letter of Concurrence between Tri-State and Western on Platte Valley transformation venture (2005) Glendo Substation Relay System & RTU substitution

Slide 4

Accomplishment since 2003 Gering Station Service Switchgear (2006) Gering PCBs 162, 462, 966 substitution (2006) Glendo PCB 524 (2006) Limestone options (PCB 442, new control & hand-off framework, new RTU) (2009) Repaired Mobile transformer and came back to Guernsey Rural (2009)

Slide 5

Upcoming Projects (2008-2011) Torrington transformer KY2A option (In-administration May 2010) Gering-Gering Valley 34.5-kV remake (2011)

Slide 6

Torrington KY2A option Project to include 115/34.5-kV 50 MVA transformer Joint task with City of Torrington Transformer conveyed - Oct 2008 Construction contractual worker complete – Dec 2008 Control Design & switchboard conveyed Commissioning continuous

Slide 7

Platte Valley Voltage Conversion The goal of the Platte Valley Voltage Conversion Project is to change over the working voltage of the 34.5-kV transmission lines and related offices between Lingle Substation and Sievers Rural Substation to 69-kV. The lines were reconstructed in the mid 90\'s to 69-kV standard.

Slide 8

Platte Valley Voltage Conversion most of the work is changing over the various substations and taps along the line fragments to 69-kV. Western and Tri-State marked a Letter of Concurrence in November 2004 laying the underlying extension and obligations regarding the redesigns.

Slide 9

Platte Valley Voltage Conversion Scope: Lingle Substation: Install a 115/69-kV 40 MVA transformer and related gear. Torrington Substation: Install a 69/34.5-kV 50 MVA transformer and related hardware. Sievers Rural Tap: Install a 69/34.5-kV 25 MVA transformer and related hardware. Develop eleven miles of new 69-kV line between East Morrill Tap and Sievers Rural Tap.

Slide 10

Platte Valley Voltage Conversion Scope (cont): Torrington Rural Tap: Replace transformer and remake high side for 69-kV. Henry Tap: Replace transformer and reconstruct high side for 69-kV. Town of Morrill Tap: Make vital changes to work existing double twisting transformer at 69-kV. Interface the Town of Lingle Tap to the Limestone-Lingle 34.5-kV line.

Slide 11

Platte Valley Voltage Conversion Scope (cont): Estimated Cost: $21M Planned ISD: FY2015 Project Manager: Roy Gearhart Current Status: Not wanted to begin until FY2012. Framework Studies overhauled at regular intervals. Framework Studies got ready for 2010.

Slide 12

Platte Valley Voltage Conversion Major Milestones to date Various System Studies: 2000-2010 Meeting with Platte Valley Customers: April 2003 Western and Tri-State marked Ltr of Concurrence: November 2004 Meeting with Platte Valley Customers: April 2005 Meeting with Platte Valley Customers: April 2007 Published Platte Valley Voltage Conversion Project Overview: January 23, 2006

Slide 13

Platte Valley Voltage Conversion Lingle Substation Scope: 115kV/69kV 40MVA transformer with high and low side interrupters for assurance. New Substation site required for 115/69kV augmentations New Control Building Schedule: 2012-2015 Estimate: $4,730k (In 2014 $\'s)

Slide 14

Platte Valley Voltage Conversion Lingle Town Scope: Move association with Limestone 34.5-kV line with ~0.5 mile of new 34.5-kV line. Plan: 2012-2015 Estimate: $100k - $200k (no subtle element gauge done)

Slide 15

Platte Valley Voltage Conversion Torrington Rural Scope: Convert to 69-kV with a 69kV/12.47kV 5MVA and a 69kV/24.9kV 7.5MVA transformers and 69kV changes on high side. Plan: 2012-2015 Estimate: $1,500k (In 2014 $\'s)

Slide 16

Platte Valley Voltage Conversion Torrington Substation Scope: New 69-kV yard with 4–69kV bayous; 69kV/34.5kV 50MVA Transformer; New Control Building; more land. Plan: 2012-2015 Estimate: $5,400k (In 2014 $\'s)

Slide 17

Platte Valley Voltage Conversion Henry Scope: Convert to 69-kV with a 69kV/12.47kV 7.5MVA transformer and 69kV upgrades on high side. Plan: 2012-2015 Estimate: $900k (In 2014 $\'s)

Slide 18

Platte Valley Voltage Conversion Village of Morrill Scope: Convert to 69-kV high side twisting on existing 34.5/69/7.2/12.47kV 2.5MVA transformer and 69kV changes on high side. Plan: 2012-2015 Estimate: No appraisal done

Slide 19

Platte Valley Voltage Conversion East Morrill Tap – Wildcat 69-kV line Scope: Construct ~3 miles of new 69-kV line from East Morrill tap to Wildcat. Makes the Lyman-Wildcat 34.5-kV line. Permits Village of Lyman and Lyman Rural burdens to stay 34.5-kV Schedule: 2012-2015 Estimate: $1,395k (in 2012 $\'s)

Slide 20

Platte Valley Voltage Conversion Wildcat Substation Scope: No new increases at first arranged at Wildcat. Should the framework needs change, the new Torrington-Sievers Rural 69-kV line could be interconnected with the 34.5-kV framework at Wildcat to give framework unwavering quality upgrades.

Slide 21

Platte Valley Voltage Conversion Wildcat-Sievers Rural 69-kV line Scope: Construct another 10 mile 69-kV line amongst Wildcat and Sievers Rural to sidestep Mitchell zone. Sidesteps City of Mitchell and Mitchell Rural burdens, abandoning them at 34.5-kV Schedule: 2012-2015 Estimate: $4,045K

Slide 22

Platte Valley Voltage Conversion Sievers Rural Scope: 69/34.5kV 20 MVA transformer with high and low side security; new control building; land. Sievers Rural burden remains served at 34.5-kV. Plan: 2012-2015 Estimate: $2,250k (In 2014 $\'s)

Slide 23

Wrap Up Questions or Comments?

Slide 24

Thank You Contacts Bob Easton (Western) 970-461-7272 or aeaston@wapa.gov Roy Gearhart (Western) 970-461-7333 or rgearhar@wapa.gov Stan Lawrenson (Tri-State) 303-254-3452 or slawrenson@tristategt.org

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