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APS Deer Valley Facility Phoenix, Arizona June 18, 2015 9 AM -12 PM

APS/SRP 2 nd Quarter Stakeholder Meeting for Transmission Planning FERC Order 890 SRP Attachment K APS Attachment E. APS Deer Valley Facility Phoenix, Arizona June 18, 2015 9 AM -12 PM. Agenda. 1. Welcome, Introductions, and Stakeholder Meeting Overview

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APS Deer Valley Facility Phoenix, Arizona June 18, 2015 9 AM -12 PM

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  1. APS/SRP 2nd Quarter Stakeholder Meeting for Transmission PlanningFERC Order 890 SRP Attachment K APS Attachment E APS Deer Valley Facility Phoenix, Arizona June 18, 2015 9 AM -12 PM

  2. Agenda 1. Welcome, Introductions, and Stakeholder Meeting Overview 2. Status of Action Items - 12/18/2014 Joint APS/SRP 4th Quarter Public Planning Meeting 3. Purpose of Today’s meeting – APS Planning 4. Purpose of Today’s meeting – SRP Planning   5. Stakeholder Questions/Comments 6. Action Items

  3. 2. Status of Action Items • There were no action items captured at the 4th Quarter Stakeholder meeting held on 12/18/2014

  4. 3. Purpose of Today’s meeting • Per APS’s OATT, APS conducts the 2nd quarter public planning meeting to • A) review its current transmission study plan • B) provide an opportunity for transmission customers to update their loads, resources and other data that were submitted by September 1, 2014 • C) provide an opportunity for stakeholder input on any aspect of the study plan • D) review any stakeholder proposals previously submitted to APS for study plan alternatives • E) invite submittal of additional stakeholder study plan proposals for review and discussion • F) provide updates on APS’s planned transmission projects

  5. 3.A. APS’s Study Plan • APS has two distinct, but related, transmission study processes • NERC Compliance • APS’s Annual Planning • The difference between the two plans: • NERC Compliance: • Minimum 2 seasons, 2 discrete years (near and long term); all cases examine P0-P7 (formerly Category A – D) • APS’s annual planning: 1 season, 10 consecutive years; N-0 and N-1 • Annual plan is used as starting point for NERC Compliance • Working on combining TPL assessment and Annual Planning for future years

  6. 3.A. 2014 NERC Compliance Studies

  7. 3.A. 2014 NERC Compliance Studies

  8. 3.A. NERC Compliance Results? • 2014 Results? • APS is fully compliant with NERC Transmission Planning Standards • 2015 Progress? • Case building complete • DYD files being finalized • Perform study work starting in July/August

  9. 3.A. 2015 NERC Compliance Study Methodology NERC Compliance Studies Cases • 2016, 2020 & 2024 Summer Peak Cases • Off-peak Case is Low Load and High Import (shoulder case with low generation in the Phoenix Metro Area) • 2017 Light Spring case; one case in the near-term • High ratio of renewable generation to overall generation on-line • Following analyses are conducted: • Thermal • Post-Transient • Short-Circuit • Transient Stability

  10. 3.A. 2015 NERC Compliance Studies • TPL-001-4 combined previous TPL-001 through TPL-004 • No longer Category A, B, C, & D • Now P0 through P7 • Covers all scenarios from N-0 to N-1-1 • Also includes Multiple Contingencies due to relay or breaker failures • Requires more cases/scenarios • Includes short-circuit analysis

  11. 3.A. APS TPL Plan for 2015 Study

  12. 3.A. 2016-2025 Ten-Year Plan Methodology Note: AZ coordinated cases also included IID • Coordinated Base Cases • 2015HS – SASG/AZ coordinated case used to build heavy summer 2016-2019 • 2020HS – AZ coordinated case used to build heavy summer 2021-2023 • 2024HS – SWAT/AZ coordinated case used to build heavy summer 2025 (same SWAT updated case submitted to WestConnect) • The intermediate cases are APS/SRP coordinated • 69kV transmission models incorporated • Most up-to-date forecasts for peak summer loads • N-0 and N-1 analysis conducted for all ten years

  13. 3.A. 2016-2025 Ten-Year Plan Status • AZ Seed cases are complete (2016HS, 2020HS, 2024HS) • Intermediate cases are in development • Ten-Year plan studies will be performed in the summer/fall • Draft results typically available during 4th Quarter Stakeholder meeting • Ten-Year Plan filed by the end of January • BTA Studies will also be completed and filed • 10th Year Snapshot & Extreme Contingency • RMR study needs are being evaluated

  14. 3.B. Customer Load/Resource Updates APS has all load/resource data from Network Customers and has incorporated them into the base cases Should you like to provide information for the future APS planning cycles, please see critical dates on the next slide

  15. 3.B. Feedback on the Plan? • Feedback on the Planor methodologies • NERC Reliability • Ten Year Plan • See next slide to see how APS would evaluate plan submittals or alternatives.

  16. 3.B. Review Stakeholder proposals previously submitted APS received no stakeholder proposals in 2014 or prior to this meeting.

  17. 3.B. Submittal of additional study plan proposals • If you have study ideas for APS to consider, please send a detailed message to: apstransmission@aps.com • Please include (at a minimum) • Your Name/Company/contact info (e-mail/phone #) • What the purpose of the study request is? And how will the results be used? • E.g. Determine how much load the system can accommodate without new generation/transmission? Results will be used to inform developers where there may be opportunities for additional commercial development without transmission/generation investment. • What year(s) and season(s) is of interest? • What type of study – reliability (power flow only?) economic?

  18. 3.B. APS Ten-Year Plan Projects 2015-2024 Transmission Plan Filed on Jan. 30, 2015

  19. 3.B. Changes since 2015 Plan was filed • Two projects completed • Hassayampa-North Gila #2 500kV line • Energized May, 2015 • New Path 49 (EOR) rating of 10,100 MW • Palm Valley-Trilby Wash 230kV line • Energized April, 2015 • Trilby Wash now providing new source for northwestern part of valley • Actively under construction • Palo Verde-Delaney-Sun Valley 500kV • Sun Valley-Trilby Wash 230kV • Bagdad 115kV Relocation

  20. In-Service: • Hassayampa-NorthGila 500kV #2 Line 2016: • Delaney-Palo Verde 500kV Line • Delaney-Sun Valley 500kV Line • 2017: • Bagdad 115kV Line Relocation • Mazatzal 345/69kV Substation • 2018: • Morgan-Sun Valley 500kV Line • Ocotillo Modernization Project

  21. In-service: • Palm Valley-Trilby Wash 230kV Line 2016: • Sun Valley-Trilby Wash 230kV Line • 2018: • Ocotillo Modernization Project • 2026: • Morgan-Sun Valley 230kV Line

  22. In-service: • Hassayampa-NorthGila 500kV #2 Line 2018: • North Gila-Orchard 230kV Line

  23. Bulk Transformer Additions/Replacements

  24. APS Planning - Study Requests Generation Interconnection Requests Transmission Interconnection Requests Transmission Service Requests Economic Study Requests

  25. 3.C. Generation Interconnections • Active Generation Interconnection requests • APS OASIS contains Generation Interconnection Queue • http://www.oatioasis.com/azps/index.html • 2 Solar projects - 220 MW • 1 Wind projects - 1000 MW • 1 Wind/Solar project – 101 MW wind/60 MW solar • 3 Natural Gas projects – 2429 MW Note: Generator Queue information as of 4/23/15

  26. A - HAA-NG 500kV line • 1 projects • 200 MW B - Gila Bend/Buckeye • 2 projects • 654 MW C – Metro Phx • 1 projects • 595 MW D - FC • 1 projects • 1200 MW E - Northern AZ • 2 projects • 1161 MW D E C B A • Note 1: Generator Queue information as of 4/23/15 • Note 2: Figures displayed may not represent complete queue

  27. 3.D. Transmission Service Requests 1 Wires to Wires Interconnection Requests 42 Transmission Service Requests

  28. 3.E. Economic Study Requests • Currently no Economic Study Requests

  29. 3.F. APS Planning – Comments & Questions • Stakeholder comments/questions on 2014 Study Results or 2015 Study Requests • Requests can be made at any time to: • apstransmission@aps.com

  30. 4. Purpose of Today’s Meeting • Per SRP’s OATT, SRP conducts the 2nd quarter public planning meeting to: • Review its current transmission study plan • provide an opportunity for transmission customers to update their loads, resources and other data • review any stakeholder proposals previously submitted to SRP for study plan alternatives B) Provide updates on SRP’s transmission projects (Ten Year Plan) C) Provide updates on the generation study requests D) Provide updates on the transmission study requests E) Provide updates on the economic study requests F) Invite stakeholders to submit additional study proposals 12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning

  31. 4.A. – SRP’s Study Plan • SRP has two distinct, but related, transmissionstudy plans • NERC Compliance • SRP’s budgetary planning • The difference between the two plans: • NERC Compliance: 3 seasons/scenarios, 2 discrete years (near and long term) • SRP’s annual planning: 1 season, 10 consecutive years (first 6 years are for budget, remaining 4 for compliance purposes) • The similarities between the two plans: • Similar load forecasts, demand response • They are reliability studies 12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning

  32. 4.A. 2015 NERC Compliance Study Methodology • Coordinated Base Cases (Seed Cases) • 2016 – AZ coordinated case used to build 2016-2019 • 2020 – AZ coordinated case used to build 2020-2024 • 2024 – AZ coordinated case used to build 2025 • The intermediate cases are APS/SRP coordinated • SRP NERC Compliance cases • 2017 and 2021 • 69kV transmission models incorporated • Most up-to-date forecasts for peak summer loads 12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning

  33. 4.A. 2015 NERC Compliance Study Methodology NERC Compliance Studies Cases • 2017 & 2021 Summer Peak & Off-peak Cases • 2017 & 2021 Off-peak Cases are Low Load (spring/winter conditions) and High Import (shoulder cases with low generation in the Phoenix Metro Area) • Following analyses are conducted: • Thermal analysis • Post-Transient • Transient Stability 12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning

  34. 4.A. NERC Compliance Studies 12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning

  35. 4.A. NERC Compliance Studies Note: TPL-003 Studies performed on Peak, Low Load & High Import cases 12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning

  36. 4.A. NERC Compliance Results • 2014 Results • 2014 NERC Compliance Studies were finalized by beginning of November of 2014 • 2015 Progress • Case building under way • TPL-001-4 effective 1/1/2016 • SRP will perform the studies for TPL-001-4 in order to compliant after 1/1/2016 • Besides nomenclature differences, major addition is requirement for short circuit studies 12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning

  37. 4.A.– Stakeholder Proposals • SRP received no stakeholder proposals in 2014 or prior to this meeting

  38. 4.A. – Customer Load/Resource Updates • No customers provided load/resource data in September 2014 • SRP received no stakeholder proposals in 2014 or prior to this meeting. • If you like to provide information for the future SRP planning cycles, please see critical dates on the next slide 12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning

  39. 12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning

  40. 4.B. SRP Ten Year Plan 2015-2024 • SRP has Filed its Ten Year Plan as of January 30, 2015 12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning

  41. 4.B. 2016-2025 Ten Year Plan Methodology • Coordinated Base Cases • See NERC Compliance Methodology slide #6 • 69kV transmission models incorporated • Most up-to-date forecasts for peak summer loads • TPL-001 & TPL-002 Studies Conducted for all ten years 12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning

  42. FUTURE 500kV SUBSTATION EXISTING 500kV SUBSTATION 500kV System NAVAJO GS MOENKOPI (APS) 2015-2024 CEDAR MT (APS) NEVADA YAVAPAI (APS) DUGAS (APS) MARKETPLACE CHOLLA(APS) McCULLOUGH MEAD MORGAN (APS) ELDORADO SUGARLOAF PERKINS CORONADO PINNACLE PEAK (APS) WESTWING MOHAVE 345kV RUDD PALO VERDE 2016 HASSAYAMPA JOJOBA SPRINGERVILLE (TEP) KYRENE EXISTING LINES 2024 SILVERKING BROWNING FUTURE LINES DUKE PINAL WEST PINALCENTRAL SUNZIA (SWPG) 230kV 2018 Central New Mexico 12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning All Changes since January 2014 Ten Year Plan shown in red

  43. DOUBLE CIRCUIT, PHASE TIED LINE TO W.A.P.A.PINNACLE PEAK TO APSPINNACLE PEAK 230kV System SRPPINNACLE PEAK W.A.P.A. 2015-2024 WESTWING DEERVALLEY(APS) W.A.P.A. PAPAGO ALEXANDER W.A.P.A. AGUAFRIA GOLDFIELD BRANDOW THUNDERSTONE WHITETANKS ROGERS To Silver King RUDD WARD TO APSOCOTILLO ORME LIBERTY(W.A.P.A.) BROWNING SANTAN CORBELL KYRENE Price Road Corridor Project RS-27 (TBD) ANDERSON KNOX TBD EXISTING 230kV CIRCUIT RS-28 (2017) DINOSAUR 2021 2017 SCHRADER FUTURE 230kV CIRCUIT PFISTER TBD EXISTING 230kV SUBSTATIONS 2021 ABEL FUTURE 230kV SUBSTATIONS GENERATING STATION DESERTBASIN TO SANTAROSA(APS) RANDOLPH TO CASAGRANDE(APS) PINALCENTRAL 12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning All Changes since January 2014 Ten Year Plan shown in red

  44. Eastern Mining Area ROOSEVELT MORMONFLAT HORSEMESA 2015-2024 STEWARTMOUNTAIN FRAZIER TOSILVER KING500kV SILVERKING 230 ELLISON PINTOVALLEY MIAMI GOLDFIELD MOONSHINE 230kV 115kV PINAL TOTHUNDERSTONE CARLOTA CARREL SPURLOCK 230kV (2019) SUPERIOR TRASK OAKFLAT KNOLL RS-29 230kV (2019) RS-30 115KV (2019) RAY MORRIS 2019 FUTURE SUBSTATION KEARNY EXISTING SUBSTATION HAYDEN BONNEYBROOK (APS) GENERATING STATION ASARCO FUTURE LINE TO APACHE(AEPCO) COOLIDGE(W.A.P.A.) EXISTING LINE TRANSFORMER 12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning All Changes since January 2014 Ten Year Plan shown in red

  45. 4.B. SRP changes since 2014 Plan • Completed Projects • Pinal West – Duke – Pinal Central 500kV line • Pinal Central – Browning 500kV line • Pinal Central – Randolph 230kV line • Desert Basin – Pinal Central 230kV line • Pinal Central 500kV and 230kV Substation • Duke 500kV Substation • Browning – Rogers 230kV line • New Projects • Hassayampa – Pinal West 500kV Jojoba line loop in 2016 • Browning –Corbell and Santan – Rogers 230kV line in 2020 • Hassayampa – Pinal West 500kV #2 in 2024 • Delayed Projects • Superior-Silver King 115kV re-route was 2015, now 2017 • Schrader-RS28 230kV line was 2016, now 2017 12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning

  46. 4.B. SRP changes since 2014 Plan • Delayed Projects • RS28 230kV substation was 2016, now 2017 • Eastern Mining Expansion was 2018, now 2019 • Sun Zia was 2017, now 2018 • Silver King-RS29 230kV was 2018, now 2019 • RS29 230kV substation was 2018, now 2019 • RS29-RS30 115kV was 2018, now 2019 • RS30 115kV substation was 2018, now 2019 • Ellsworth Technology Corridor was 2019, now TBD • New Superior-New Oak Flat 230kV was 2021, now TBD • New Oak Flat-Silver King 230kV was 2021, now TBD • Abel 500kV Substation was 2020, now TBD • Removed Projects • None 12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning

  47. 4.C. – 4.E. Transmission Planning Study Process SRP evaluates plan submittals or alternatives according to the following flowchart. 12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning

  48. 4.C.-E. SRP Planning - Study Requests • Generation Interconnection Requests • Transmission Interconnection Requests • Transmission Service Requests • Economic Study Requests 12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning

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