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“One Nevada” Transmission Line (ON-Line) PowerPoint Presentation
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“One Nevada” Transmission Line (ON-Line)

“One Nevada” Transmission Line (ON-Line)

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“One Nevada” Transmission Line (ON-Line)

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  1. “One Nevada” Transmission Line (ON-Line)

  2. May 20, 2009 “One Nevada” Transmission Line (ON-Line) and “Western/NV Energy SOI” Projects Update SWAT Meeting, Albuquerque, NM

  3. Outline • ON-Line: • Project description • Current project status • Design study results • WECC Rating Review Process: Phase II Study • Next Steps

  4. Outline • 2. “West Tie”: • Statement of Interest with Western • Project description • NVE Routing Study (PUCN authorized) • Renewable Energy Development in Nevada and Southwest: RETAAC and SWAT RTTF • SSPG 2009 Study Plan

  5. “One Nevada” Transmission Line (ON-Line): Nevada Map

  6. ON-Line Project:New Plan of Service & Milestones. Phase I: ON-Line ~600-MW (11/30/2012) • Robinson Summit 500/345 kV Switching Station: 2525MVA 500/345-kV XFMRs (no PSTs & SC) • Fold of Falcon – Gonder 345 kV Line Into Robinson Summit Substation; 70% series compensation on Falcon – Robinson Summit 345 kV Line • Harry Allen – Robinson Summit 500 kV # 1 Transmission Line (“ONLine”): 236 mi, 4100-Mvar reactors, single-pole switching, no series compensation

  7. ON-Line Project:New Plan of Service & Milestones (Cont) Phase II: ~2000-MW Transfer (01/2015) • Depends on new Renewable (and traditional) generation and new Transmission Interconnections • ON-Line Series compensation: 70% RS - HA 500 kV • 2×600 MVA PSTs 345 kV @ RS • 300 MVAR SVC at Robinson Summit 345 kV PST bus

  8. Revised ON-Line Project Objectives • Interconnect SPPC and NPC Systems (advantages: scheduling, optimal dispatch, reduced operational generation reserves) • Deliver renewable energy from Northern to Southern Nevada • Utilize SWIP for future interconnection between Southern Nevada/AZ with Idaho System (SWIP-North) • Deliver renewable energy & other future generation from the Nort/NE (ID, Wy, Utah) to Southern Nevada/AZ/CA • Interconnect White Pine Energy Center: deferred

  9. One Nevada Line Project: One-Line Diagram

  10. ON-Line Project Status ON-Line Status • Project was initiated in 2006 • Line Permitting: • BLM Permit – EIS: In progress; • ROD is expected in June 2010 • BLM Notice to Proceed is expected on 01/01/2011 • Construction Starts on 01/01/2011 • ON-Line & RS in-service date is 11/30/2012

  11. ON-Line Project Status (Continued) ON-Line Status • Design Studies: • Line tower design completed, tower spotting/staking in progress • Completed EMTP, TRV, PSS, & preliminary SSR studies • Long-lead equipment (autotransformers) production slots reserved

  12. “One Nevada” Transmission Line (ON-Line)

  13. May 20, 2009 “One Nevada” Transmission Line (ON-Line) and “Western/NV Energy SOI” Projects Update SWAT Meeting, Albuquerque, NM

  14. Outline • ON-Line: • Project description • Current project status • Design study results • WECC Rating Review Process: Phase II Study • Next Steps

  15. Outline • 2. “West Tie”: • Statement of Interest with Western • Project description • NVE Routing Study (PUCN authorized) • Renewable Energy Development in Nevada and Southwest: RETAAC and SWAT RTTF • SSPG 2009 Study Plan

  16. “One Nevada” Transmission Line (ON-Line): Nevada Map

  17. ON-Line Project:New Plan of Service & Milestones. Phase I: ON-Line ~600-MW (11/30/2012) • Robinson Summit 500/345 kV Switching Station: 2525MVA 500/345-kV XFMRs (no PSTs & SC) • Fold of Falcon – Gonder 345 kV Line Into Robinson Summit Substation; 70% series compensation on Falcon – Robinson Summit 345 kV Line • Harry Allen – Robinson Summit 500 kV # 1 Transmission Line (“ONLine”): 236 mi, 4100-Mvar reactors, single-pole switching, no series compensation

  18. ON-Line Project:New Plan of Service & Milestones (Cont) Phase II: ~2000-MW Transfer (01/2015) • Depends on new Renewable (and traditional) generation and new Transmission Interconnections • ON-Line Series compensation: 70% RS - HA 500 kV • 2×600 MVA PSTs 345 kV @ RS • 300 MVAR SVC at Robinson Summit 345 kV PST bus

  19. Revised ON-Line Project Objectives • Interconnect SPPC and NPC Systems (advantages: scheduling, optimal dispatch, reduced operational generation reserves) • Deliver renewable energy from Northern to Southern Nevada • Utilize SWIP for future interconnection between Southern Nevada/AZ with Idaho System (SWIP-North) • Deliver renewable energy & other future generation from the Nort/NE (ID, Wy, Utah) to Southern Nevada/AZ/CA • Interconnect White Pine Energy Center: deferred

  20. One Nevada Line Project: One-Line Diagram

  21. ON-Line Project Status ON-Line Status • Project was initiated in 2006 • Line Permitting: • BLM Permit – EIS: In progress; • ROD is expected in June 2010 • BLM Notice to Proceed is expected on 01/01/2011 • Construction Starts on 01/01/2011 • ON-Line & RS in-service date is 11/30/2012

  22. ON-Line Project Status (Continued) ON-Line Status • Design Studies: • Line tower design completed, tower spotting/staking in progress • Completed EMTP, TRV, PSS, & preliminary SSR studies • Long-lead equipment (autotransformers) production slots reserved

  23. ON-Line Project Status (Continued) ON-Line Status • Major Equipment: Specifications for autotransformers, PSTs, breakers, reactors & arresters have been finalized • TRV/RRRV issues: Equipment (breakers, arresters, CCVT) has been specified

  24. ON-Line Project Status (Continued) ON-Line Status • Substation construction & equipment (Robinson Summit, Harry Allen & Falcon): prepared RFPs, initiated bids for major equipment (breakers, arresters, CCVTs) • Telecom (OPGW, M/W & Mobile Radio): design in progress

  25. ON-Line Project Status (Continued) ON-Line Status Remaining design issues: • Additional SSR studies: • Obtain Torsional data for units with possibility of the resonance (indicated by Frequency Scans) • Complete SSR analysis • Develop mitigations: a) TCSC, b) RAS, c) Filters

  26. ON-Line Project Status (Continued) ON-Line Status Remaining design issues: • Voltage/Reactive Power Control issues: • Voltage profiles and control on 500 kV and 345 kV lines and substations • Max power transfer through 500 kV and 345 kV lines • Possible voltage support (SVC) at Robinson 345 kV bus

  27. ON-Line Project Status (Continued) ON-Line Status Remaining design issues: • Series compensation issues: • Design/specifications for 345 and 500 kV series capacitors (TCSC) is pending outcome of the SSR studies

  28. Phase II Study Phase II ON-Line Study • Project has been in Phase II since 03/2007 • PRG included in WECC Western Arizona Transmission Studies Task Force (WATS) • Proposed Ratings: 2000 N-S, 1000 S-N

  29. Phase II Study Phase II ON-Line Study • Completed Studies: • Power Flow • Transients • Post-Transients • Non – Simultaneous cases • Simultaneous ONLine-Centennial case

  30. Phase II Study Phase II ON-Line Study • Completed Studies: • Non – Simultaneous cases: • Pre-Project, 2014hs • N-S 2,000 MW, 2014hs; • S-N 1,000 MW, 2014hs;

  31. Phase II Study (Cont) Phase II ON-Line Study • Simultaneous cases: • ON-Line North to South & Centennial 2014hs; ON-Line N-S 2,000 MW + Centennial 3,000 MW; 2X750MW @ EEC + 2,000 MW from SPPC to NPC

  32. Next Steps Rating Study Status Study Scope Study Results Next Steps Simultaneous Cases • EOR/WOR/Path 63 • TOT2B/2C • GBT 500 kV Line • Sensitivities

  33. NVEnergy Statement of Interest (SOI) to Western NV Energy responded to Western Area Power Administrations request for interest with proposal of a new 500 kV transmission system traversing along western Nevada from North to South-East. This project will: Interconnect with large areas of renewable generation in Northern and Southern Nevada,

  34. NVEnergy “Western Intertie” Statement of Interest (SOI) to Western Connect NV Energy north with NV Energy south, Connect Western SNR (Sierra Nevada Region) to Western at Mead (WALC) The total 500 kV lines miles proposed is estimated at 675 miles.

  35. Phases

  36. Segments

  37. Nevada Renewable Energy Renewable Energy Standard of 20% in 2015 Nevada Renewable Energy Transmission Access Advisory Committee (RETAAC) Phase 1 report is available at http://gov.state.nv.us/Energy/FinalReport.htm

  38. Nevada Renewable Energy Current queue requests for generation interconnection for about 8,000 MW of new generation, mostly renewable NVE participates in SWAT Renewable Energy Task Force (SWAT RTTF)

  39. RETAAC Resource zones

  40. NVEnergyRoutingStudies

  41. RETAAC

  42. WREZ

  43. Sierra Sub-Regional Planning Group (SSPG) 2009 Study Plan5-17-09: preliminary and subject to change. Prepared by Paul Schmidt The Study cases Include: • SOI, SWIP, TTP (TANC Transmission Project), • CNC (Canada to N. California Project: WA- N. California, 3000 MW DC), • 10,100 MW of new generation • 1,749 miles of new transmission

  44. SSPG 2019 Heavy Summer Case Includes: • SOI, SWIP, TTP, • CNC, • 10,100 MW of new generation • 1,749 miles of new transmission

  45. Questions?Thank you For Listening and Participating!