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Platte Valley Voltage Conversion Project. Customer Meeting April 28, 2010 Torrington, WY. Agenda. Introductions Accomplishments Update on Torrington Area PVVC Overview PVVC Schedule and Cost Estimates Questions/Comments Wrap Up. Accomplishments since 2003. Whiterock Substation (2005)

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platte valley voltage conversion project

Platte Valley Voltage Conversion Project

Customer Meeting

April 28, 2010

Torrington, WY

agenda
Agenda
  • Introductions
  • Accomplishments
  • Update on Torrington Area
  • PVVC Overview
  • PVVC Schedule and Cost Estimates
  • Questions/Comments
  • Wrap Up
accomplishments since 2003
Accomplishments since 2003
  • Whiterock Substation (2005)
  • Lingle Tap (2003)
  • Lyman-Yoder Tap (2005)
  • McGrew area Caps (2005)
  • Stored mobile transformer at Guernsey Rural (2004)
  • Wood Pole Testing and Treatment (2003 & 2004)
  • Letter of Concurrence between Tri-State and Western on Platte Valley conversion project (2005)
  • Glendo Substation Relay System & RTU replacement
accomplishment since 2003
Accomplishment since 2003
  • Gering Station Service Switchgear (2006)
  • Gering PCBs 162, 462, 966 replacement (2006)
  • Glendo PCB 524 (2006)
  • Limestone additions (PCB 442, new control & relay system, new RTU) (2009)
  • Repaired Mobile transformer and returned to Guernsey Rural (2009)
upcoming projects 2008 2011
Upcoming Projects (2008-2011)
  • Torrington transformer KY2A addition (In-service May 2010)
  • Gering-Gering Valley 34.5-kV rebuild (2011)
torrington ky2a addition
Torrington KY2A addition
  • Project to add 115/34.5-kV 50 MVA transformer
  • Joint project with City of Torrington
  • Transformer delivered - Oct 2008
  • Construction contractor complete – Dec 2008
  • Control Design & switchboard delivered
  • Commissioning ongoing
platte valley voltage conversion
Platte Valley Voltage Conversion
  • The objective of the Platte Valley Voltage Conversion Project is to convert the operating voltage of the 34.5-kV transmission lines and related facilities between Lingle Substation and Sievers Rural Substation to 69-kV.
  • The lines were rebuilt in the early 90’s to 69-kV standard.
platte valley voltage conversion8
Platte Valley Voltage Conversion
  • The majority of the work is converting the numerous substations and taps along the line segments to 69-kV.
  • Western and Tri-State signed a Letter of Concurrence in November 2004 laying the initial scope and responsibilities for the upgrades.
platte valley voltage conversion9
Platte Valley Voltage Conversion
  • Scope:
  • Lingle Substation: Install a 115/69-kV 40 MVA transformer and associated equipment.
  • Torrington Substation: Install a 69/34.5-kV 50 MVA transformer and associated equipment.
  • Sievers Rural Tap: Install a 69/34.5-kV 25 MVA transformer and associated equipment.
  • Construct eleven miles of new 69-kV line between East Morrill Tap and Sievers Rural Tap.
platte valley voltage conversion10
Platte Valley Voltage Conversion
  • Scope (cont):
  • Torrington Rural Tap: Replace transformer and rebuild high side for 69-kV.
  • Henry Tap: Replace transformer and rebuild high side for 69-kV.
  • Village of Morrill Tap: Make necessary modifications to operate existing dual winding transformer at 69-kV.
  • Connect the Town of Lingle Tap to the Limestone-Lingle 34.5-kV line.
platte valley voltage conversion11
Platte Valley Voltage Conversion
  • Scope (cont):
  • Estimated Cost: $21M
  • Planned ISD: FY2015
  • Project Manager: Roy Gearhart
  • Current Status: Not planned to start until FY2012. System Studies updated every two years. System Studies planned for 2010.
platte valley voltage conversion12
Platte Valley Voltage Conversion
  • Major Milestones to date
  • Various System Studies: 2000-2010
  • Meeting with Platte Valley Customers: April 2003
  • Western and Tri-State signed 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
platte valley voltage conversion13
Platte Valley Voltage Conversion

Lingle Substation

Scope:

115kV/69kV 40MVA transformer with high and low side interrupters for protection.

New Substation site required for 115/69kV additions

New Control Building

Schedule: 2012-2015

Estimate: $4,730k (In 2014 $’s)

platte valley voltage conversion14
Platte Valley Voltage Conversion

Lingle Town

Scope:

Move connection to Limestone 34.5-kV line with ~0.5 mile of new 34.5-kV line.

Schedule: 2012-2015

Estimate: $100k - $200k (no detail estimate done)

platte valley voltage conversion15
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 improvements on high side.

Schedule: 2012-2015

Estimate: $1,500k (In 2014 $’s)

platte valley voltage conversion16
Platte Valley Voltage Conversion

Torrington Substation

Scope:

New 69-kV yard with 4–69kV bays; 69kV/34.5kV 50MVA Transformer; New Control Building; more land.

Schedule: 2012-2015

Estimate: $5,400k (In 2014 $’s)

platte valley voltage conversion17
Platte Valley Voltage Conversion

Henry

Scope:

Convert to 69-kV with a 69kV/12.47kV 7.5MVA transformer and 69kV improvements on high side.

Schedule: 2012-2015

Estimate: $900k (In 2014 $’s)

platte valley voltage conversion18
Platte Valley Voltage Conversion

Village of Morrill

Scope:

Convert to 69-kV high side winding on existing 34.5/69/7.2/12.47kV 2.5MVA transformer and 69kV improvements on high side.

Schedule: 2012-2015

Estimate: No estimate done

platte valley voltage conversion19
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. Creates the Lyman-Wildcat 34.5-kV line. Allows Village of Lyman and Lyman Rural loads to remain 34.5-kV

Schedule: 2012-2015

Estimate: $1,395k (in 2012 $’s)

platte valley voltage conversion20
Platte Valley Voltage Conversion

Wildcat Substation

Scope:

No new additions initially planned at Wildcat. Should the system needs change, the new Torrington-Sievers Rural 69-kV line could be interconnected with the 34.5-kV system at Wildcat to provide system reliability improvements.

platte valley voltage conversion21
Platte Valley Voltage Conversion

Wildcat-Sievers Rural 69-kV line

Scope:

Construct a new 10 mile 69-kV line between Wildcat and Sievers Rural to bypass Mitchell area.

Bypasses City of Mitchell and Mitchell Rural loads, leaving them at 34.5-kV

Schedule: 2012-2015

Estimate: $4,045K

platte valley voltage conversion22
Platte Valley Voltage Conversion

Sievers Rural

Scope:

69/34.5kV 20 MVA transformer with high and low side protection; new control building; land.

Sievers Rural load remains served at 34.5-kV.

Schedule: 2012-2015

Estimate: $2,250k (In 2014 $’s)

wrap up
Wrap Up
  • Questions or Comments?
thank you
Thank You
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