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- 1. Regional Transmission Corridors Energy Summit 2010 Ports-to-Plains Alliance Broomfield, CO April 9, 2010
- 2. Topics Today’s Transmission System RenewableEnergy Transmission Planning Proposed Projects Conceptual Plans Issues to Address
- 3. Tri-State G&T Tri-State is a member owned, not-for-profit, generation and transmission cooperative 44 member owners across Wyoming, Colorado, Nebraska and New Mexico Our Members serve a population of 1.4 million Tri-State owns 5,300 miles of HV transmission Another 1,300 miles planned over the next 10 years Tri-State has revamped its interconnection process to expedite the connection of new generation to its system
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- 7. North west to Western Interconnect Canad Monroe-Echo Lake a Alberta to BC Transmission Paths Cross Cascades West of Paul-Raver North Hatwai North of Paul-Allston Nor Hanford th of J Montana to NW o hn D Allston-Keeler ay West of Broadview West of MCNary West of Colstrip Cross NW to Idaho Cascades South Montana Southease Idaho-Montana Borah West TOT 4B COI PDCI TOT 4A Reno-Alturas Idaho-Sierra Bridger West Path C Intermountain- TOT 1A Mona Bonanza TOT 3 West IPP DC TOT 5 Midway-Los Banos TOT 2C TOT 2A WOR Southwest of Four Northern-Southern Corners California EOR Cholla-Pinnacle Peak NOTE: SDG&E-Comision Federal de Electicidad For clarity, not all WECC Rated Paths are shown. 7
- 8. Southwest Power PoolTransmission
- 10. Another Way ToLook At It Winter Peak Load Spring/Fall Load Valleys Summer Peak Load Data: 08/2003 to 08/2004
- 11. Utilization Dictates TransmissionRates (HPX) RENEWABLES-ONLY MIX OF RESOURCES $25 NM-AZ @ $5.00/kW-mo TRANSMISSION RATE $/MWh CO-NM @ $4.00/kW-mo $20 WY-CO @ $3.25/kW-mo EFFECTIVE $/MWH RAT $15 $10 $5 $- 30% 40% 50% 60% 70% 80% 90% TRANSMISSION LINE UTILIATION How to Improve Transmission Utilization • Geographic Diversity (wind in multiple locations) • Blending wind with solar and other renewables • Use of gas-fired generation for “firming” and meeting load
- 12. Transmission CALGARY GORDON M SHRUM RUPERT Segments ENDAKO TUMBLER WILLISTON BIG KNIFE CREEK Largely comprised of PORT MCNEIL KELLY LAKE RED DEER existing transmission NEW 53 GOLDSTREAM WEST JANET BROOKS EMPRESS NICOLA INDEGLOW corridors SELKIRK NEW56 MONROE NEW42 BELL OLYMPIA ~100 segments identified TROUTDALE SACAJAWEA NEW92 CONRAD HAVRE GARRISON NEW93 JOHN DAY Suitability for siting or path BETHEL OXBOW NEW39 BROADVIEW SUMMER LAKE rating not assessed BOISE NEW 19 CAPT JACK NEW 15 BRADY Linkage between WREZs CASPER YELLOWCAKE MIDPOINT NORTH NEW 35 MIRACLE LARAMIE RIVER (~60) and Loads Zones TRACY MILE VACA DIXON ARCHER ELY MONA NEW 12 (20) AULT STERLI BELLOTA NEW 10 PAWNEE MONTROSE WEST CEDAR PONCHA NEW NEW 9 MIDWAY LAMAR ANTELOPE MEAD CUDEI NEW 11 SAN LUIS PISGAH NEW FOUR CORNERS CHOLLA DEVERS MOUNTAIN RIO PUERCO WREZ Transmission Segments SERRANO BLYTHE WESTWING NEW 28 sub-group chaired by Andy Leoni of LOS COCHES ALAMORIO HARQUAHALA TOME Tri-State Generation & Transmission SANTA ROSA GREENLEE ARROYO NEW 26 CPO TORTOLITA HILDAGO LUNA CALIENTE SN FELIPE
- 13. State Government Interest WesternGovernors Association Colorado Energy Development Authority New Mexico Renewable Energy Transmission Authority Wyoming Infrastructure Authority Nebraska—Wind for Export Legislation Upper Midwest Transmission Development Initiative (IA, MN,ND, SD, WI) Texas-CREZ
- 14. Local Market versusExport Market Estimated wind energy potential exceeds local needs. NREL estimate of Ports-to-Plains states: 5 to 9 million MW US installed generating capacity 2008 (all fuels) 1.1 million MW Everyone wants to export to either California or southeast States are trying to be first to market: Competing with each other for economic development opportunities Want to change transmission planning philosophy to focus on wind export in addition to reliability Export scenarios will put tremendous stress on existing transmission built primarily to serve local load. Electric system stability will limit installed wind generation installation to a fraction of the theoretical capability.
- 15. Gateway West—Idaho powerand Rocky Mountain Power (PacifiCorp)
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- 20. National Grid “Overlay”Concept
- 21. The “Battleground” Issues Who pays (cost allocation)? Customers, generators, utilities, or taxpayers Should local customers/utilities pay for export lines? States Rights vs. National/Regional/Customer Interests Permitting, siting, and economic development Interstate commerce Who Plans, Owns & Manages the Grid? Planning Issues Oversizing Transmission for Optimized Land Use & Economies of Scale National Grid Overlay Green Transmission Lines