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Ameren Missouri 2015 Annual Stakeholder Meeting Overview

Review of AMMO Pricing Zone historical transmission rates and calculations, effective June 1, 2015. Comparison to prior year, expenses, revenue requirements, and future projects.

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Ameren Missouri 2015 Annual Stakeholder Meeting Overview

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  1. 2015 Annual Attachment O Stakeholder Meeting Ameren Missouri July 15, 2015

  2. Agenda Primary purpose is to review AMMO Pricing Zone Historical 2014 Transmission Rate Calculations which became effective June 1, 2015 • Protocol Timeline • Comparison to Previous Revenue Requirement • 2014 AMMO Pricing Zone NITS Charge

  3. Protocol timeline

  4. Ameren Missouri Revenue Requirement June 2014 vs June 2015 Calculation

  5. Ameren Missouri June 2015 Calculation Rate Base

  6. Ameren Missouri June 2015 Calculation Expenses

  7. Ameren Missouri June 2015 Calculation Capital Structure

  8. Ameren Missouri June 2015 Calculation Revenue Requirement

  9. Ameren Missouri June 2015 Calculation Net Revenue Requirement The Prior Period Adjustment relates to the FERC Audit Refund in Docket No. FA13-2-000

  10. Ameren Missouri June 2015 Calculation AMMO Schedule 9 Rate Calculation

  11. Ameren Missouri June 2015 Calculation Attachment GG Calculation - Page 1

  12. Ameren Missouri June 2015 Calculation Attachment GG Calculation - Page 2

  13. 2014 Significant transmission projects

  14. Future Significant transmission projects

  15. Miso web links • Transmission Pricing - Attachments O, GG & MM Information • https://www.misoenergy.org/MarketsOperations/TransmissionSettlements/Pages/TransmissionPricing.aspx • Ameren OASIS • http://www.oasis.oati.com/AMRN/index.html • MTEP 14 • https://www.misoenergy.org/Planning/TransmissionExpansionPlanning/Pages/MTEP14.aspx • MTEP 15 • https://www.misoenergy.org/Planning/TransmissionExpansionPlanning/Pages/MTEP15.aspx • Schedule 26 & 26-A Indicative Charges • https://www.misoenergy.org/Planning/TransmissionExpansionPlanning/Pages/MTEPStudies.aspx

  16. QUESTIONS?

  17. Appendix Supplemental Background Information

  18. Ameren Missouri transmission • Ameren Missouri is a transmission-owning subsidiary of Ameren Corporation, as well as a MISO Transmission Owner (TO) • Ameren Illinois and Ameren Transmission Company of Illinois (ATXI) are two other Ameren subsidiaries that are MISO TOs. • ATXI was formed to build and own new regional transmission projects such as the MISO Multi-Value Projects • Ameren Missouri will continue to build and own traditional reliability projects needed to meet local needs and continue to maintain its existing transmission system • Ameren Missouri is currently building a new local reliability project in Southeast Missouri. • Ameren Missouri is the only MISO Transmission Owner in the AMMO pricing zone.

  19. MISO ATTACHMENTs O & GG Calculate rates for Schedules 9, 26 & 26-A • Attachment GG - Schedule 26 • Attachment MM – Schedule 26-A • Attachment O - net revenue requirement billed under Schedule 9 • Schedules 26 and 26-A are billed by MISO • Schedule 9 is billed by Ameren

  20. MISO ATTACHMENT gg • Cost Recovery for certain Network Upgrades • Eligible projects • Market Efficiency • Generator Interconnections • Cost shared based upon project type • MISO-wide based on load • Subregional based on LODF (Line Outage Distribution Factor) • Ameren Missouri has three Attachment GG projects completed • One additional project under construction • These projects were approved by MISO under prior Tariff provisions which allowed limited cost sharing for certain reliability projects • Attachment MM is very similar to Attachment GG • Applies to MISO Multi-Value Projects, but is not applicable to Ameren Missouri since it is not building or developing any MVPs.

  21. MISO ATTACHMENT O & GG • All transmission costs included in Attachment O calculation • Schedule 9 based on net revenue requirement – reductions for: • Any costs recovered in Schedules 26 & 26-A • Revenue Credits • Point-to-Point revenue in Schedules 7 & 8 • Rental revenue • Revenue from generator interconnections

  22. Miso transmission expansion plan (MTEP) • Developed on an annual basis building upon previous analysis • MISO, Transmission Owners & Stakeholders • Includes subregional planning meetings • MTEP goals • Ensure the reliability of the transmission system • Ensure compliance with NERC Standards • Provide economic benefits, such as increased market efficiency • Facilitate public policy objectives, such as meeting Renewable Portfolio Standards • Address other issues or goals identified through the stakeholder process • Multiple future scenarios analyzed • End result – comprehensive, cohesive plan for MISO footprint • MTEP approved by MISO Board of Directors

  23. AMMO rate Inputs • Rates calculated using prior year FERC Form 1 data (historical calculation) • Rate base items based on Dec 31 ending balances • Only wholesale customers pay the Schedule 9 Rate in AMMO • About 7% of load • Ameren Missouri retail customers • Do not pay AMMO Schedule 9 Rate • Ameren Missouri transmission facilities & costs included in bundled rates set by MoPSC • Other transmission related costs also included in retail rate case • Note that some Transmission Owners’ rate calculations are different • Rates are initially set based on projected data • Annual True-up calculation to reflect actual costs reported in Form 1

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