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ICT Strategic Transmission Plan (ISTEP) Review and Status Update

ICT Strategic Transmission Plan (ISTEP) Review and Status Update. Entergy Transmission Summit July 29, 2008 Astor Crown Plaza New Orleans, Louisiana. Douglas Bowman, PE Lead Engineer, ICT Planning 501-688-1640 dbowman@SPP.org. ISTEP. ICT Strategic Transmission Expansion Plan Attachment K

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ICT Strategic Transmission Plan (ISTEP) Review and Status Update

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  1. ICT Strategic Transmission Plan (ISTEP)Review and Status Update Entergy Transmission SummitJuly 29, 2008Astor Crown PlazaNew Orleans, Louisiana Douglas Bowman, PELead Engineer, ICT Planning501-688-1640dbowman@SPP.org

  2. ISTEP • ICT Strategic Transmission Expansion Plan • Attachment K • Paragraph 14.1 - “The ICT will identify potential economic upgrades on the Transmission System, including upgrades to existing facilities as well as construction of new facilities.” • Paragraph 14.3 – “The ICT will identify such upgrades based on screening criteria, which may include considerations such as frequent transmission loading relief events, frequently constrained flowgates in the Available Flowgate Capability process or Weekly Procurement Process (WPP), flowgates with high congestion costs as identified in the WPP process, and commonly invoked must-run operating guides.”

  3. ISTEP Scope and Purpose • Promote transmission expansion on the Entergy transmission system by identifying and developing economic projects that address transmission constraints through powerflow studies and stakeholder input • Focus on creating new, higher-voltage transmission in order to address potential issues on the Entergy transmission system, as opposed to upgrading the underlying lower-voltage system. • Not used for cost allocation • Entergy is not obligated to construct ISTEP projects • Not related to reliability requirements

  4. ISTEP Objective • Improve Load-Serving Capability • Improve Inter-regional Transfer Capability • Improve Load Pockets/Load Centers • Relieve Constraining Flowgates

  5. ISTEP Phase I • Completed 12/2007 • Identified Operational Limitations • 213 TLRs resulting in curtailment of 340GWh of firm and non-firm transmission service from January to October, 2007. • Identified Transfer Capability Limitations • Most limiting flowgates identified

  6. ISTEP Phase I (continued) • Modeling • 2015 Summer Peak Case • Includes 2008 Construction Plan upgrades • Does not include Base Plan upgrades • Does not include Operating guides, redispatch, breaker operation, or other mitigation plans

  7. ISTEP Phase I (continued) • 20 proposed projects consisting of one or more transmission upgrades • Proposed Projects • Louisiana – 7 Projects • Arkansas – 5 Projects • Mississippi – 5 Projects • Texas – 1 Project • Other – 2 Short Term Projects

  8. ISTEP Phase II • Stakeholders ranked Phase I projects • Approximately 20 stakeholder responses • Top 5 were selected from each stakeholder ranking • Final ranking was developed using a combination of stakeholder rankings and the ICT’s knowledge of the Entergy system.

  9. ISTEP Phase II Projects • South LA Bulk • Central Arkansas 230 kV • Acadiana Area • Central MS Bulk • McAdams Series Reactor • Seams Projects

  10. South LA & Acadiana South LA Bulk • Projects address: • WOTAB Import • Constraining flowgates • Acadiana • Flowgates: • Webre – Wells • Mt. Olive – Hartburg • Wilbert – Livonia • Terrebonne – Greenwood • Cecelia – Moril • Meaux - Judice Webre – Richard 500kV Fancy Point – Hartburg 500 kV

  11. Central AR 230kV Central AR 230kV • Projects address: • Constraining flowgates • Flowgates: • Morrilton East-Gleason • Conway- Donaghey Gleason - Conway W. 230 kV Gold Creek-Conway Industrial 230kV Conway W. – Conway Ind. 230kV Cabot-Gold Creek 230kV

  12. Central AR 230kV Central AR 230kV • Projects address: • Constraining flowgates • Flowgates: • Morrilton East-Gleason • Conway- Donaghey Kanis 230/115kV transformer Little Rock South 230/115kV transformer Wrightsville 500/ 230kV transformer Kanis-Mabelvale 230 kV Mabelvale 500/230kV transformer Wrightsville-Little Rock South 230kV

  13. Central AR 230kV Mabelvale-Cheetah 230kV Cheetah-Mt. Pine South 230kV • Projects address: • Constraining flowgates • Flowgates: • Morrilton East-Gleason • Conway- Donaghey Hot Springs-Cheetah 230kV Mt. Pine South-Carpenter 230 kV Carpenter-Hot Springs EHV 230kV Hot Springs EHV 500/230kV transformer

  14. South LA & Acadiana Acadiana Area • Projects address: • WOTAB Import • Constraining flowgates • Acadiana • Flowgates: • Webre – Wells • Mt. Olive – Hartburg • Wilbert – Livonia • Terrebonne – Greenwood • Cecelia – Moril • Meaux - Judice Wells – Labbe 230kV Labbe – Bonin 230 kV Sellers – Labbe 230kV Richard – Sellers 230 kV Sellers– Segura 230 kV Sellers – Meaux 230 kV

  15. Central MS Bulk Central MS Bulk • Projects address: • Constraining flowgates • Flowgates: • Ray Braswell – Baxter Wilson Grand Gulf – Ray Braswell 500 kV

  16. McAdams Series Reactor • Install a 36Ω reactor in series with McAdams 500/230 kV transformer McAdams Series Reactor 500/230kV

  17. Seams Projects • Ft. Smith-ANO-ISES 500kV • El Dorado – Longwood Series Compensation • Messick 500/230 • Ft. Smith-NW Texarkana-McNeil 500kV-Turk • S. Fayetteville – Van Buren – ANO 500kV

  18. Ft. Smith – ANO – ISES 765 kV Ft. Smith – ANO – ISES 500 kV • Projects address: • Improve SPP/Entergy Interface

  19. El Dorado – Longwood Series Compensation • Increase Transfer Capability of the Line El Dorado – Longwood Series Compensation

  20. Messick 500/230 kV • Mt Olive – Hartburg Tap Stability Issue • Improve SPP/Entergy Interface Existing Mt. Olive - Hartburg 500kV Messick 500/230kV

  21. Ft. Smith – NW Texarkana – Turk – McNeil 500 kV FT. Smith – NW Texarkana 500kV Turk Turk – McNeil 500kV NW Texarkana – Turk 500kV • Projects address: • Improve SPP/Entergy Interface

  22. S. Fayetteville – Van Buren – ANO 500kV • Projects address: • Improve SPP/Entergy Interface S. Fayetteville – Van Buren 500 kV Van Buren – ANO 500kV

  23. Status • South LA Bulk • Engineering analysis complete • Economic analysis proceeding • Central Arkansas 230 kV • Engineering analysis underway • Acadiana Area • Engineering analysis complete • Currently in stakeholder negotiations

  24. Status (continued) • Central MS Bulk • Engineering analysis underway • McAdams Series Reactor • Engineering analysis complete • Currently in stakeholder negotiations • Seams Projects • Engineering analysis underway

  25. ISTEP Phase I Report Published LTTIWG Meeting: Discuss comments and establish scope for additional analysis LTTIWG Meeting: Present Final Strategic Plan Phase II Report Stakeholder comment period ends Complete ISTEP Phase II LTTIWG Meeting: Present status update and list of seams projects for analysis LTTIWG Meeting: Present update of study status Transmission Summit: Present update of study status LTTIWG Meeting: Present update of study status and Webre – Wells Economic Study Results July, 2008 Dec. 4, 2007 Feb. 12, 2008 Feb. 1, 2008 May, 2008 September, 2008 December, 2008 January, 2009 October, 2008 ISTEP Timeline Stakeholder comment period

  26. Next Steps • ICT to study ISTEP projects in further detail • Continue engineering analysis of ISTEP and seams projects • Complete Webre-Wells economic analysis • Complete economic analysis of remaining ISTEP and seams projects

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