Tri-State December 2013 Board Meeting 1 Who We Are Tri-State is a - - PowerPoint PPT Presentation

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Tri-State December 2013 Board Meeting 1 Who We Are Tri-State is a - - PowerPoint PPT Presentation

Jan 10, 2024 362 likes •980 views

Tri-State December 2013 Board Meeting 1 Who We Are Tri-State is a not-for-profit, wholesale power supplier owned by 44 electric cooperatives and public power districts serving a population of approximately 1.4 million people. Purpose of

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1 Tri-State December 2013 Board Meeting

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Who We Are

Tri-State is a not-for-profit, wholesale power supplier

  • wned by 44 electric

cooperatives and public power districts serving a population of approximately 1.4 million people.

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Purpose of This Public Meeting

  • Involve all interested stakeholders in Tri-State’s

transmission planning process.

  • Review current study plan.
  • Solicit information from transmission customers
  • n potential loads and resources.
  • Answer your questions.
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Transmission Planning Objectives

  • Provide Transmission Service to all network

customers.

  • Provide Reliable Service under NERC/WECC

Reliability Standards.

  • Provide Low Cost Service to Member owners.
  • Provide Access to other stakeholders for the

efficient planning, utilization and development

  • f the transmission system.
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Basic Statistics

  • 5,396 miles of transmission in which Tri-State has an
  • wnership or capacity interest:

1220 miles - 345 kV

1001 miles - 230 kV

184 miles - 138 kV

2942 miles - 115 kV

49 miles - 69 kV

  • Over 220 bulk system substations
  • David A. Hamil DC Tie at Stegall, NE
  • Extensive high-speed communications system of fiber optics

and microwave links for operation and control of the transmission system.

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Transmission System

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Telecommunications System

1500 miles of fiber 455 radio sites

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Inputs to study plan

  • Network Customers identify load and resource

requirements annually.

  • Other Transmission Providers update base case

assumptions (system topology, loads and resources).

  • Tri-State Member Systems request new delivery

points throughout the year.

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Inputs to study plan (continued)

  • Generation Interconnection customers submit

applications (two open seasons).

  • Regulatory and governmental agencies introduce

policy initiatives.

  • Tri-State’s Board of Directors make decisions on

capital expenditures.

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10 Tri-State December 2013 Board Meeting

Caballo – Mimbres 115 kV Rebuild

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Caballo – Mimbres 115 kV Rebuild

Description: Rebuild / re-conductor existing 115kV line with 477 MCM ACSR and steel pole H-frame structures. Voltage: 115 kV Length: 57 miles Type: Line Status: Continuing Planned ISD: 2019 Purpose: Replace aging structures and conductor. Increase capacity and improve load-serving capability and reliability to Sierra Electric.

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12 Tri-State December 2013 Board Meeting

Escalante – Gallup 115 kV Line Uprate

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Escalante – Gallup 115 kV Line Uprate

Description: Uprate existing line to a minimum of 80 MVA (400 amps). Voltage: 115 kV Length: 42 miles Type: Line Status: Continuing Planned ISD: 2015 Purpose: A reliability improvement to eliminate potential overloading of the existing line for NERC Category B contingencies.

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14 Tri-State December 2013 Board Meeting

Picacho – Las Cruces 115 kV Uprate

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Picacho – Las Cruces 115 kV Uprate

Description: Uprate existing line to 100 degrees C thermal rating (932 amps). Voltage: 115 kV Length: 3.5 miles Type: Line Status: Continuing Planned ISD: 2015 Purpose: A reliability improvement to eliminate potential overloading of the existing line for a NERC Category B contingency.

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16 Tri-State December 2013 Board Meeting

Gladstone 230 kV Phase Shifting Transformer

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Gladstone 230 kV Phase Shifting Transformer

Description: Install 300 MVA 230 kV +/- 60 degree PST at Gladstone Substation. Voltage: 230 kV Type: Substation Status: Complete Planned ISD: 2015 Purpose: Permits control of north to south flows into northern New Mexico and mitigates potential

  • verloads on the 115 kV system.
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18 Tri-State December 2013 Board Meeting

Wayne Child Sub Additions

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Wayne Child Sub Additions

Description: Tap LRS-Story line adjacent to Archer. Add 345/230 kV 600 MVA transformer and 230 kV tie to Archer Substation. Voltage: 345 kV and 230 kV Length: 0 miles Type: Substation / Line Status: Continuing Planned ISD: 2018 Purpose: Improve Tri-State’s power delivery and load serving capabilities from its LRS generation. Project increases TOT3 transfer capability.

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20 Tri-State December 2013 Board Meeting

Southeast Wyoming Transmission Project

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Southeast Wyoming Transmission Project

Description: Construct a 230/115 kV 150 MVA substation connecting to the LRS-DJ line and a 115 kV transmission line to Belle Fourche. Voltage: 115 kV Length: 50 miles Type: Line Status: Continuing Planned ISD: 2016 Purpose: Improve load-serving capability and reliability to Niobrara Electric Association’s 69 kV system.

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22 Tri-State December 2013 Board Meeting

Wind River 115 kV Reliability Upgrade

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Wind River 115 kV Reliability Upgrade

Description: Construct a 230/115 kV interconnection to the PACE Wyopo Substation, a 115 kV ring bus at Wind River and a 115 kV line connecting the two substations. Voltage: 115 kV Length: 17 miles Type: Substation / Line Status: Planned Planned ISD: 2019 Purpose: Mitigate potential voltage stability issues and improve power delivery and load serving capabilities to the Wind River area.

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24 Tri-State December 2013 Board Meeting

Badwater–DJ 230 kV Project

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Badwater-DJ 230 kV Project

Description: Construct a 230 kV line between the Badwater substation and a new station sectionalizing the Dave Johnston (DJ) to LRS 230 kV line. Voltage: 230 kV Length: 117 miles Type: Substation / Line Status: Planned Planned ISD: To be determined Purpose: Increase power delivery and load serving capabilities to the Badwater area by approximately 180 MW. Increase TOT 4B ATC.

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26 Tri-State December 2013 Board Meeting

Big Sandy - Calhan

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27 Tri-State December 2013 Board Meeting

Big Sandy - Calhan

Description: New 230 kV line between Big Sandy and Calhan Substations Voltage: 230 kV Length: 55 miles Type: Line Status: Planned Planned ISD: 2019 Purpose: Support Member load between Denver and Colorado Springs

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28 Tri-State December 2013 Board Meeting

Boone – Walsenburg 230 kV Line

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Boone – Walsenburg 230 kV Line

Description: Construct a 230 kV transmission line from Boone Substation to Walsenburg Substation Voltage: 230 kV Length: 69 miles Type: Line Status: Planned Planned ISD: To be determined Purpose: Reliability – eliminate the need for the existing Walsenburg Remedial Action Scheme (RAS)

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Lamar – Boone 230 kV Line

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Boone – Walsenburg 230 kV Line

Description: Construct a 230 kV transmission line from Boone Substation to Lamar Substation Voltage: 230 kV Length: 100 miles Type: Line Status: Planned Planned ISD: To be determined Purpose: Accommodate potential increased resource injection at Lamar.

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32 Tri-State December 2013 Board Meeting

Burlington – Lamar 230 kV Transmission Project

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Burlington – Lamar 230 kV Transmission Project

Description: Construct a 230 kV transmission line from Burlington to Lamar. Voltage: 230 kV Length: 107 miles Type: Line Status: Continuing Planned ISD: 2020 Purpose: Member network service, load-serving, reliability.

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Burlington – Wray 230 kV Line

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Burlington – Wray 230 kV Line

Description: Construct new 230 kV line from the existing Burlington Substation to the existing Wray Substation Voltage: 230 kV Length: 72 miles Type: Line Status: Under Construction Planned ISD: 2016 Purpose: Improve load-serving capability, remove generation operating restrictions and support renewable resource development in eastern Colorado.

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Falcon – Midway 115 kV Line Uprate Project

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37 Tri-State December 2013 Board Meeting

Falcon – Midway 115 kV Line Uprate Project

Description: Planned uprate of existing 115 kV line between Falcon and Midway Voltage: 115 kV Length: 27miles Type: Distribution Status: Planned Planned ISD: 2017 Purpose: Increase conductor thermal rating

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38 Tri-State December 2013 Board Meeting

Keota 345:115 kV

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39 Tri-State December 2013 Board Meeting

Keota 345:115 kV

16-18 mile, double circuit 115 kV 8 mile, double circuit 115 kV

  • Function:
  • Serve increasing High West Energy and Morgan County Rural Electric

Association loads (Oil and Gas).

  • Description:
  • Sectionalize the existing LRS – Story 345 kV line.
  • Construct 345/115 kV substation (2 x 225 MVA transformers)
  • Construct a double circuit 115 kV line to two load serving substations:

Redbox and Redtail.

  • Planned ISD:
  • Keota substation: Complete.
  • Keota – Redbox – Redtail 115 kV: 2015/2016.
  • Regulatory Status:
  • CPCN Granted.

0.5 mile, single circuit 115 kV

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Keota 345:230 kV (a.k.a. Pony Creek)

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41 Tri-State December 2013 Board Meeting

  • Function:
  • Serve increasing Morgan County Rural Electric Association oil and gas

loads.

  • Description:
  • Construct 345:230 kV substation at Keota (2 x 600 MVA transformers).
  • Construct single circuit 230 kV line to Pony Creek substation.
  • Tie new 230 kV system with Redbox 115 kV through either a short 115 kV

line, or by expanding Redbox to include 230 kV yard.

  • Planned ISD:
  • To be determined
  • Regulatory Status:
  • CPCN Applied 11/26/2014

18 mile, single circuit 230 kV New 230/115kV Pony Creek substation

Keota 345:230 kV (a.k.a. Pony Creek)

3.5 mile, double circuit 115x230 kV

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Keota 3rd Source

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Keota 3rd Source

Description: New 230 kV transmission line to Keota Voltage: 230 kV Length: To be determined Type: Transmission Status: Planned Planned ISD: To be determined Purpose: Increase Keota load serving capability

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44 Tri-State December 2013 Board Meeting

Lamar – Front Range Project

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Lamar – Front Range Project

Description: Two high voltage transmission paths from Lamar Substation to Pueblo area and a second path from Lamar to substations near Brush and/or Deer Trail Voltage: 345 kV Length: 300 – 350 miles Type: Line Status: Conceptual Planned ISD: To be determined Purpose: Tri-State reliability, system load-serving connectivity as regional power provider and future resources. Xcel Senate Bill07-100 and reliability.

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Western Colorado Transmission Upgrade Project

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Western Colorado Transmission Upgrade Project

Description: Upgrade existing transmission line and facilities from Montrose Substation to Cahone Substation from 115 kV operation to 230 kV. Voltage: 230 kV Length: 80 miles Type: Line Status: Under Construction Planned ISD: 2018 Purpose: Reliability – eliminate need for existing Nucla Remedial Action Scheme and replace failing structures.

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Pueblo West Tap Line Uprate

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Pueblo West Tap Line Uprate

Description: Upgrade existing 115 kV line conductor Voltage: 115 kV Length: 0.3 miles Type: Line Status: Under Construction Planned ISD: 2015 Purpose: Reliability, eliminate overloading of existing line for NERC Category B contingency

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San Juan Basin Energy Connect Project

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San Juan Basin Energy Connect Project

Description: New 230 kV transmission line between existing WAPA Shiprock Substation in New Mexico to a new 230 kV Iron Horse

  • Substation. A new 230 kV Kiffen Canyon

Substation will also be required Voltage: 230 kV Length: 70 miles Type: Line Status: Under Construction Planned ISD: 2018 Purpose: Reliability for loss of Hesperus 345 kV source and to serve approximately 100 MW of new industrial load in SW Colorado

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Lost Canyon – Main Switch 115 kV Project

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Lost Canyon – Main Switch 115 kV

Description: New transmission line between Lost Canyon and Main Switch Voltage: 115kV Length: 20 miles Type: Line Status: Planned Planned ISD: To be determined Purpose: Increase load serving capability

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54 Tri-State December 2013 Board Meeting

Southwest Weld Expansion Project

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Southwest Weld Expansion Project

Description: Construct approximately 49 aggregated miles

  • f 115 kV and 230 kV transmission lines with

six potential load-serving substations and/or line taps. Voltage: 115/230 kV Length: 49 miles Type: Line Status: Under Construction Planned ISD: 2017 Purpose: Load Serving Potential plans for project extension to the north are presently being evaluated by Tri- State and Xcel Energy.

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United Power System Improve Project Phase III

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United Power System Improve Project Phase III

Description: New 115 kV transmission line between Bromley and Prairie Center Substations Voltage: 115 kV Length: 4.1 miles Type: Distribution Status: Under Construction Planned ISD: 2016 Purpose: Provide transmission service between Bromley and Prairie Center

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Valley Corridor Transmission (SLV 230 kV Line Reliability)

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Valley Corridor Transmission (SLV 230 kV Line Reliability)

Description: New 230 kV transmission line from the existing San Luis Valley Substation to a new 230/345 kV substation located west of Taos,

  • NM. The new 230/345 kV substation will tap

the existing Taos – Ojo 345 kV line and will include 230/345 kV transformation and phase shifting transformer. Voltage: 230 kV Length: To be determined Type: Line Status:

  • Cancelled. New alternatives being studied in

Colorado Coordinated Planning Group. Planned ISD: To be determined Purpose: Mitigate N-1 voltage collapse in the San Luis Valley and corresponding Under Voltage Load Shedding (UVLS) needs. Provide looped service form alternative transmission corridor.

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For more information

www.tristategt.org About Us Transmission Planning www.tristategt.org Operations OATT Queues and Studies

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