National Electric Transmission Congestion Study - W2agz.com

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transmission constraint is loaded to its maximum safe operating level; and the number of hours when it is operated at or above 90% of the safe level) and the cost of congestion (such as the cost of the next MWh of energy if it could be sent across a facility already at its safe limit). Because no one metric captures all important aspects of congestion, the analysts identified the most constrained transmission paths according to several different congestion metrics and then identified those paths that were most constrained according to a combination of metrics. • Congestion Areas of Concern. These are areas New England ° The Phoenix – Tucson area ° The Seattle – Portland area ° The San Francisco Bay area. ° Figure ES-2. Critical Congestion Area and Congestion Area of Concern in the Eastern Interconnection ° The Atlantic coastal area from metropolitan New York southward through Northern Virginia, and ° Southern California. The cost of congestion varies in real time according to changes in the levels and patterns of customers’ demand (including their response to price changes), the availability of output from various generation sources, the cost of generation fuels, and the availability of transmission capacity. Transmission constraints occur in most areas of the Nation, and the cost of the congestion they cause is included to some degree in virtually every customer’s electricity bill. Although congestion has costs, in many locations those costs are not large enough to justify making the investments needed to alleviate the congestion. In other locations, however, congestion costs can be very high, and eliminating one or more key constraints through some combination of new transmission construction, new generation close to a major load, and demand-side management can reduce overall electricity supply costs in the affected areas by millions of dollars per year and significantly improve grid reliability. The Department finds that three classes of congestion areas merit further Federal attention: • Critical Congestion Areas. These are areas of the country where it is critically important to remedy existing or growing congestion problems because the current and/or projected effects of the congestion are severe. As shown in Figures ES-2 and ES-3, the Department has identified two such areas, each of which is large, densely populated, and economically vital to the Nation. They are: where a large-scale congestion problem exists or may be emerging, but more information and analysis appear to be needed to determine the magnitude of the problem and the likely relevance of transmission expansion and other solutions. As shown in Figures ES-2 and ES-3, the Department has identified four Congestion Areas of Concern: viii U.S. Department of Energy / National Electric Transmission Congestion Study / 2006
Figure ES-3. One Critical Congestion Area and Three Congestion Areas of Concern in the Western Interconnection • Conditional Congestion Areas. These are areas where there is some transmission congestion at present, but significant congestion would result if large amounts of new generation resources were to be developed without simultaneous development of associated transmission capacity. As shown in Figure ES-4, these areas are potential locations for large-scale development of wind, coal and nuclear generation capacity to serve distant load centers. Some of the areas of principal interest are: Montana-Wyoming (coal and wind) ° Dakotas-Minnesota (wind) ° Kansas-Oklahoma (wind) ° Illinois, Indiana and Upper Appalachia (coal) ° The Southeast (nuclear) ° DOE believes that affirmative government and industry decisions will be needed in the next few years to begin development of some of these generation resources and the associated transmission facilities. Figure ES-4. Conditional Constraint Areas U.S. Department of Energy / National Electric Transmission Congestion Study / 2006 ix
Page 1: NATIONAL ELECTRIC TRANSMISSION CONG
Page 5 and 6: Contents Executive Summary ........
Page 7: List of Figures (continued) 4-1. Co
Page 12 and 13: Next Steps Notice of Intent to Cons
Page 14 and 15: RRO RTO SCOPF SERC SPP SSG-WI STEP
Page 16 and 17: Figure 1-1. Map of North American E
Page 18 and 19: constraints. 4 Similarly, ISOs and
Page 20 and 21: Transmission Constraints, Paths, an
Page 23 and 24: 2. Study Approach and Methods This
Page 25 and 26: November 3, 2005, for Henry Hub gas
Page 27 and 28: Wyoming, Montana, Nevada and Utah.
Page 29 and 30: Loading Relief (TLR) actions and co
Page 31 and 32: these zones. An exception is NYISO
Page 33: production by dispatching a fixed f
Page 36 and 37: 4. Southern New England East-West F
Page 38 and 39: Several of MISO’s transmission co
Page 40 and 41: years modeled. Future electricity p
Page 42 and 43: Other observations based on the con
Page 45 and 46: 4. Congestion and Constraints in th
Page 47 and 48: Figure 4-2. Actual Transmission Con
Page 49 and 50: most likely to be the most heavily
Page 51 and 52: Figure 4-7. Existing and Projected
Page 53 and 54: 5. Critical Congestion Areas, Conge
Page 55 and 56: 5.2. Congestion Areas in the Easter
Page 57 and 58: Baltimore area will face numerous v
Page 59 and 60: new generation resources. Figure 5-
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Interconnection, and a strong commi
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prices during binding hours in 2008
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2. Is there strong commercial inter
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Reference Transmission Case, which
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Figure 5-9. Potential Wind Developm
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moderate cost renewable energy to M
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6. Request for Comments on Designat
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might be resolved. Accordingly, the
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7. Next Steps Regarding Congestion
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Refining congestion metrics As indi
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Flowgate: An individual or a group
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Transfer capability: The measure of
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Appendix A Sections 368 and 1221(a)
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`(B) the applicant for a permit is
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Ohio Consumers’ Counsel Oklahoma
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March 29, 2006 — 8:30 am - 3:00 p
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Appendix D On-Site Participants in
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Appendix E On-Line Participants in
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Grace Soderberg, NARUC Ryan Stanley
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Appendix G Outreach Meetings Held R
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Organization/Event Outreach Type Lo
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Appendix I Documents or Data Review
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60. VASTE 2005-06 Winter Study Repo
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16. Montana Department of Environme
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Appendix K List of WECC Paths 74 Pa
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