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Bob Easton WAPA-RMR Planning Manager September 1, 2010

Bob Easton WAPA-RMR Planning Manager September 1, 2010. AGENDA September 1, 2010. Transmission in West Line Separation TOT3 Example Control Areas Congestion/Expansion Questions. Subregional Planning Group Footprints. Review of Transmission Development in Wyoming. ( In-service dates ).

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Bob Easton WAPA-RMR Planning Manager September 1, 2010

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  1. Bob Easton WAPA-RMR Planning Manager September 1, 2010

  2. AGENDA September 1, 2010 • Transmission in West • Line Separation • TOT3 Example • Control Areas • Congestion/Expansion • Questions

  3. Subregional Planning Group Footprints

  4. Review of Transmission Development in Wyoming (In-service dates) (2013) (2010-2017) (2015) (2018) (2015) (2015) Routes shown are for illustrative purposes only & will be finalized following the permitting and siting process

  5. Wyoming CollectorSystem Report February 2, 2010 Task Force Members Available on the WIA’s site at: www.wyia.org

  6. Background: Qualified Resource Areas (QRAs) Source: WREZ Phase 1 Report 2009

  7. Wind Resource Development Scenario #1

  8. Wind Resource Development Scenario #2

  9. Collector System Example Feeder

  10. Conceptual example of a compact Collector System design Laramie River Station Generation Feeder Line Integrated Network Line Transmission Export Line New sub-station Existing sub-station New sub-station Wind Generation Natural Gas Generation Advanced Coal Technology Generation

  11. Existing Wyoming Transmission System and Export Projects

  12. Preliminary Cost Estimates

  13. Comparing Collector System Configuration Alternatives • Collector system design candidates for collecting up to 12 GW of wind based on reliability characteristics and preliminary costs. Notes: Costs are preliminary estimates of material and labor; costs do not include financing, right-of-way acquisition, or permitting. Costs could vary widely based on refinement of collector system designs, additional studies, and (or) level of wind generation curtailment deemed acceptable.

  14. Line Separation

  15. Typical 500-kV Transmission Structure

  16. “Minimalist” Separation Distance

  17. “Span-Length” Separation

  18. No “One-Size Fits All” • Reliability Perspective – Further Apart to Minimize Possible Simultaneous Outages • Further Apart – Land Use/Environmental • Public/Stakeholder Input • State/Regional/National Interests

  19. No “One-Size Fits All” • Redundancy Leads to more Stable Network • One-Span Length Cuts down the Probability of a Wire being Swung from One Circuit to the Other • Terrain – Mountainous vs. Farmland

  20. TOT3 Example

  21. WECC Constrained Paths PRINCE RUPERT PEACE CANYON SUNDANCE MICA LANGDON LANGDON VANCOUVER AREA 3 CANADA SEATTLE CHIEF JOSEPH AREA UNITED STATES 8 HOT SPRINGS FT. PECK 14 PORTLAND AREA HELLS COLSTRIP CANYON BUCKLEY BURNS 18 BOISE MIDPOINT 19 MALIN 66 17 SHASTA 65 20 ROUND MTN TABLE MTN 30 36 SALT LAKE CITY AREA DENVER AREA SAN FRANCISCO AREA 34 PINTO 35 31 FOUR NAVAJO 23 CORNERS 46 HOOVER 22 PHOENIX AREA 48 MOJAVE ALBUQUERQUE 51 48 AREA LOS ANGELES LUGO 50 AREA DEVERS 47 45 EL PASO AREA 49 MEXICO Transmission Paths

  22. TOT-3 TTC/ATC Calculations TOT3 Ownership Capacity MBPP – 70.5% 1132 Western – 24.93% 475 T. State – 0.83% 13 PSCo – 3.74% 60 1680

  23. G G TOT3 MAJOR LINES 345KV 230KV 115KV LRS STEGALL 400 MW 700 MW SIDNEY ARCHER NEBRASKA WYOMING TOT3 COLORADO AULT STORY N.YUMA PAWNEE

  24. G G TOT3 MAJOR LINES 345KV 230KV 115KV LRS STEGALL 0 MW LOADs to 100% OUTAGE! SIDNEY 1000 MW ARCHER WYOMING NEBRASKA TOT3 LOW VOLTAGE COLORADO AULT STORY N.YUMA PAWNEE

  25. G G OVERLOAD TOT3 MAJOR LINES 345KV 230KV 115KV LRS STEGALL 450 MW W 200 MW injection 850 MW SIDNEY NEBRASKA WYOMING ARCHER TOT3 COLORADO AULT STORY N.YUMA PAWNEE

  26. G G TOT3 MAJOR LINES 345KV 230KV 115KV LRS STEGALL 0 MW OVERLOAD/ INSTABILITY OUTAGE! SIDNEY 1200 MW ARCHER WYOMING NEBRASKA TOT3 LOW VOLTAGE COLORADO AULT STORY N.YUMA PAWNEE

  27. August 14, 2003

  28. Control Areas

  29. AGC SWITCHING TSS PRESCHEDULING RMR Dispatch Floor Not to Scale

  30. 60 59 61 GEN LOAD Role of Balancing Authorities • Monitor Boundaries • Controlled, Scheduled Interchange • Balance Generation and Load • Support Interconnection Frequency

  31. Transmission Switching Desk  • Outage Coordinator – Aligns Maintenance, WECC, and other utilities • Clearances, Hot line Orders, Voltage Control • Substations, Snowcat, and Helicopter monitoring • Outages, Callouts, and Emergency Response

  32. AGC and Reliability Desk  • Balance WACM generation and load (AGC) • Maintain scheduled system frequency • Monitor and verify Interties • Maintain and activate system reserves • Operate the DC ties

  33. Transmission Scheduling and Security Desk  • Real-time power scheduling via E-tag systems • Operate Constrained Paths • Next hour’s Interchange Target • Direct unscheduled flow procedures • Operate Phase Shifting transformers

  34. Transmission Scheduling & Security • Prescheduling • Work 1 to 4 days ahead of Real-Time • Work with other Preschedulers & Power Marketers • Process E-Tags • Review & Approve (or Deny) Tags created by marketing customers (Purchasing/Selling Entities) • Primarily checking for Transmission Rights (proper OASIS reservations), Losses, properly formatted E-Tags • Check-out daily totals with Internal & External customers (within WACM and next-door BA’s)

  35. Congestion/Expansion Planning

  36. No congested paths! January 2008 Monthly Average LMP$4 Gas

  37. June 2008 Monthly Average LMP$4 Gas Congested Paths: Northwest to Canada Idaho to Montana Bridger West COI Significant N-S Congestion

  38. QUESTIONS?

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