1. APS Deer Valley Facility Phoenix, Arizona June 22, 2017 9 AM -12 PM
APS/SRP 2nd Quarter Stakeholder FERC Order 890 APS Attachment E SRP Attachment K
APS Deer Valley Facility
Phoenix, Arizona
June 22, 2017
9 AM -12 PM

2. Agenda 1. Welcome, Introductions, and Stakeholder Meeting Overview
2. Status of Action Items - 12/12/2016 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 12/12/2016

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
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 processes:
NERC Compliance:
Minimum 2 seasons, 3 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
Working on combining TPL assessment and Annual Planning for future years
TPL assessment results utilized for 10yr plan
10Yr plan fills in the gap years

6. 3.A. NERC Compliance Results?
APS is fully compliant with NERC Transmission Planning Standards
2017 Progress?
SWAT case building complete
SWAT DYD files complete
SRP/APS interim case coordination started

7. 3.A. 2018-2027 Ten-Year Plan Methodology
Coordinated Base Cases
2019HS – AZ coordinated case used to build heavy summer
2022HS – AZ coordinated case used to build heavy summer
2027HS – AZ coordinated case
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
Note: AZ coordinated cases also included IID

8. 3.A. 2017 NERC Compliance Study Methodology
NERC Compliance Studies Cases
2019 peak case
2022 peak and off-peak cases
The long term and sensitivity cases have not been determined
Data from various IRP filings are incorporated (ex. generator retirements are accounted for)
IRP
Following analyses are conducted:
Thermal and voltage
Short-Circuit
Transient Stability

9. 3.B. Customer Load/Resource Updates
APS has all load/resource data from Network Customers and has incorporated them into the base cases
APS received no stakeholder proposals in 2016 or prior to this meeting
Should you like to provide information for the future APS planning cycles, please see critical dates on the next slide

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

13. 3.B. APS Ten-Year Plan Projects 2018-2027
Transmission Plan Filed on Jan. 31, 2017

14. In-Service:
Delaney-Palo Verde 500kV Line
Delaney-Sun Valley 500kV Line
2018:
Mazatzal 345/69kV Substation
Morgan-Sun Valley 500kV Line
Ocotillo Modernization Project

15. In-service:
Palm Valley-Trilby Wash 230kV Line
Sun Valley-Trilby Wash 230kV Line
2018:
Ocotillo Modernization Project

16. In-service:
Hassayampa-North Gila 500kV #2 Line
2021:
North Gila-Orchard 230kV Line

17. 3.B. Changes from 2016 Plan Projects completed
Palo Verde-Delaney-Sun Valley 500kV
Energized May, 2016
Sun Valley-Trilby Wash 230kV
Actively under construction
Mazatzal 345/69kV substation
Sun Valley-Morgan 500kV

18. Bulk Transformer Additions/Replacements
Description
Year
Sun Valley 500/230kV Transformer (in-service)
2016
Delaney 500/69kV Transformer (in-service)
Four Corners 500/345kV Transformer
2017
Mazatzal 345/69kV Transformer
2018
North Gila 500/230kV Transformer
2021
Orchard 230/69kV Transformer
Orchard 230/69kV Transformer #2
Saguaro 230/69kV Transformer
TBD
Prescott 230/115kV Transformer #3

19. 3.C-E. APS Planning - Study Requests
Interconnection Requests
Transmission Interconnection Requests
Generation Interconnection Requests
Transmission Service Requests
Economic Study Requests

20. 3.C. Interconnection Requests
2 Active Wires-to-Wires Interconnection requests
Active Generation Interconnection requests
APS OASIS contains Generation Interconnection Queue
10 Solar projects – 5401 MW
1 Wind projects MW
1 Wind/Solar project – 101 MW wind/60 MW solar
2 Natural Gas projects – 1129 MW
1 Battery Storage – 50 MW
Note: Generator Queue information as of 05/25/17

21. A - Hoodoo Wash B - Gila Bend/Buckeye C - Metro Phx D - Saguaro Area
7 projects
1770 MW
B - Gila Bend/Buckeye
1 projects
634 MW
C - Metro Phx
50 MW
D - Saguaro Area
5 projects
1128 MW
E - Douglas
17.5 MW
F - Moenkopi
3 projects
2261 MW
G - Cholla
2 projects
275 MW
H - Yuma Area
1 project
70 MW
I - Delaney
809MW F G I C B A H D
Note 1: Generator Queue information as of 05/25/17
Note 2: Figures displayed may not represent complete queue E

22. 3.D-E Transmission Service Requests and Economic Study Requests
37 Transmission Service Requests that may require a SIS
Currently no Economic Study Requests

23. 3.F. Submittal of additional study plan proposals
If you have study ideas for APS to consider, please send a detailed message to:
Please include (at a minimum)
Your Name/Company/contact info ( /phone #)
What the purpose of the study request is? And how will the results be used?
What year(s) and season(s) is of interest?
What type of study – reliability (power flow only?) economic?

24. 6/22/2017 APS/SRP Stakeholder Meeting for Transmission Planning
SRP Stakeholder Meeting For Transmission Planning FERC Order 890 SRP Attachment K
6/22/2017 APS/SRP Stakeholder Meeting for Transmission Planning
6/26/2012, Community Relations Committee, S. Carlos

25. 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
6/22/2017 APS/SRP Stakeholder Meeting for Transmission Planning

26. 6/22/2017 APS/SRP Stakeholder Meeting for Transmission Planning
4.A. – SRP’s Study Plan
SRP has two distinct, but related, transmission study plans
NERC Compliance
SRP’s budgetary planning
The difference between the two plans:
NERC Compliance studies based on new TPL Standard: 2 seasons/scenarios, 3 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
6/22/2017 APS/SRP Stakeholder Meeting for Transmission Planning

27. 4.A. 2017 NERC Compliance Study Methodology
Coordinated Base Cases (Seed Cases)
2019 – AZ coordinated case used to build
2022 – AZ coordinated case used to build
2026 – AZ coordinated case used to build 2027
The intermediate cases are APS/SRP coordinated
69kV transmission models incorporated
Most up-to-date forecasts for peak summer loads
TPL Assessment will take place in 2018
6/22/2017 APS/SRP Stakeholder Meeting for Transmission Planning

28. 4.A. 2017 NERC Compliance Study Methodology
Planned NERC Compliance Studies Cases
2020 Summer Peak & Sensitivity
2022 Off-peak, & Sensitivity
2023 Summer Peak Case, & Sensitivity
2025 Summer Peak Case
Following analyses are conducted:
Thermal analysis
Transient Stability
Short Circuit
6/22/2017 APS/SRP Stakeholder Meeting for Transmission Planning

29. 4.A. NERC Compliance Studies
NERC STANDARD
Type of Studies Completed
TPL P0
Thermal
Transient Stability
Short Circuit
2020
Peak , Sensitivity X
2022
Off-peak, Sensitivity
2023
Peak, Sensitivity
2025
Peak
TPL P1, P2
6/22/2017 APS/SRP Stakeholder Meeting for Transmission Planning

30. 4.A. NERC Compliance Studies
NERC STANDARD
Type of Studies Completed
TPL P3-P7
Thermal
Transient Stability
2020
Peak , Sensitivity X
2022
Off-peak, Sensitivity
2023
Peak, Sensitivity
2025
Peak
TPL Extreme Events
6/22/2017 APS/SRP Stakeholder Meeting for Transmission Planning

31. 4.A. NERC Compliance Results
2016 NERC Compliance Studies were finalized by the beginning of November 2016
6/22/2017 APS/SRP Stakeholder Meeting for Transmission Planning

32. 4.A. – Customer Load/Resource Updates
No customers provided load/resource data in September 2016
SRP received no stakeholder proposals in 2016 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
6/22/2017 APS/SRP Stakeholder Meeting for Transmission Planning

33. 6/22/2017 APS/SRP Stakeholder Meeting for Transmission Planning

34. 6/22/2017 APS/SRP Stakeholder Meeting for Transmission Planning
4.B. SRP Ten Year Plan
SRP has filed its Ten Year Plan as of January 31st, 2017
6/22/2017 APS/SRP Stakeholder Meeting for Transmission Planning

35. 4.B. 2018-2027 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
N-0 and N-1 Studies Conducted for all ten years
6/22/2017 APS/SRP Stakeholder Meeting for Transmission Planning

36. 6/22/2017 APS/SRP Stakeholder Meeting for Transmission Planning
NAVAJO GS
500kV System
MOENKOPI
(APS)
CEDAR MT
(APS)
NEVADA
YAVAPAI
(APS)
MARKETPLACE
DUGAS
(APS)
CHOLLA (APS)
McCULLOUGH
230kV
MEAD
ELDORADO
MORGAN
(APS)
SUGARLOAF
PERKINS
CORONADO
WESTWING
PINNACLE PEAK (APS)
MOHAVE
345kV
RUDD
PALO VERDE
TEP
HASSAYAMPA
JOJOBA
SPRINGERVILLE
(TEP)
2024
KYRENE
BROWNING
SILVER KING
PINAL WEST
DUKE
PINAL CENTRAL
SUNZIA (SWPG)
Central
New Mexico
2021
EXISTING LINES
FUTURE LINES
FUTURE 500kV SUBSTATION
EXISTING 500kV SUBSTATION
All Changes since January 2016 Ten Year Plan shown in red
6/22/2017 APS/SRP Stakeholder Meeting for Transmission Planning

37. 6/22/2017 APS/SRP Stakeholder Meeting for Transmission PlanningTO
W.A.P.A. PINNACLE PEAK TO
APS PINNACLE PEAK
230kV System
W.A.P.A.
SRP PINNACLE PEAK
WESTWING
DEER VALLEY (APS)
PAPAGO
W.A.P.A.
W.A.P.A.
ALEXANDER
AGUA FRIA
BRANDOW
GOLDFIELD
THUNDERSTONE
WHITE TANKS
ROGERS
RUDD To
Silver King
Line Reconfiguration
WARD
ORME
TO APS OCOTILLO
LIBERTY (W.A.P.A.)
2020
BROWNING
CORBELL
Mesa
Technology
Corridor
ANDERSON
Price Road
Corridor Project
KYRENE
RS-27
TBD
SANTAN
DOUBLE CIRCUIT, PHASE TIED LINE
KNOX
TBD
BALL
TBD
EXISTING 230kV CIRCUIT
RS-28
2019
DINOSAUR
FUTURE 230kV CIRCUIT
2019
SCHRADER
PFISTER
TBD
2021
EXISTING 230kV SUBSTATIONS
2021
ABEL
FUTURE 230kV SUBSTATIONS
COPPER CROSSING
2021
GENERATING STATION
DESERT BASIN
FUTURE GENERATING STATION
TO SANTA ROSA (APS)
RANDOLPH
TO CASA GRANDE (APS)
PINAL CENTRAL
All Changes since January 2016 Ten Year Plan shown in red
6/22/2017 APS/SRP Stakeholder Meeting for Transmission Planning

38. 6/22/2017 APS/SRP Stakeholder Meeting for Transmission Planning
Eastern
Mining Area
ROOSEVELT
MORMON FLAT
HORSE MESA
STEWART MOUNTAIN
TO SILVER KING 500kV
FRAZIER
SILVER KING
230
2026
ELLISON
PINTO VALLEY
GOLDFIELD
MIAMI
MOONSHINE
230kV
115kV
TO THUNDERSTONE
Reroute
2017
CARREL
CARLOTA
PINAL
SPURLOCK
NEW SUPERIOR
2026
NEW OAK FLAT
2026
SUPERIOR
TRASK
OAK FLAT
KNOLL
RAY
MORRIS
FUTURE SUBSTATION
KEARNY
EXISTING SUBSTATION
HAYDEN
BONNEYBROOK
(APS)
GENERATING STATION
SANDSTONE
ASARCO
FUTURE LINE
Reroute
2019
TO APACHE (AEPCO)
EXISTING LINE
COOLIDGE (W.A.P.A.)
COCHRAN
TRANSFORMER
All Changes since January 2016 Ten Year Plan shown in red
6/22/2017 APS/SRP Stakeholder Meeting for Transmission Planning

39. 4.B. SRP changes since 2016 Plan
Completed Projects
None
Revised In-Service Dates
Price Road Corridor, was TBD, now 2019 – TBD
Mesa Technology Corridor was TBD, now 2019 (previously called Ellsworth Technology Corridor)
Silver King – New Oak Flat – New Superior 230kV was TBD, now 2026 (previously listed as two separate projects)
6/22/2017 APS/SRP Stakeholder Meeting for Transmission Planning

40. 4.B. SRP changes since 2016 Plan
New Projects
Coolidge – Hayden 115kV re-route (2019)
Copper Crossing – Abel 230kV (2021)
Removed Projects
None
6/22/2017 APS/SRP Stakeholder Meeting for Transmission Planning

41. 6/22/2017 APS/SRP Stakeholder Meeting for Transmission Planning
4.C. – 4.E. Transmission Planning Study Process SRP evaluates plan submittals or alternatives according to the following flowchart.
6/22/2017 APS/SRP Stakeholder Meeting for Transmission Planning

42. 4.C.-E. SRP Planning - Study Requests
Generation Interconnection Requests
Transmission Interconnection Requests
Transmission Service Requests
Economic Study Requests
6/22/2017 APS/SRP Stakeholder Meeting for Transmission Planning

43. 4.C. SRP Planning –Interconnection Requests (Transmission)
Currently there are no Transmission Interconnection Requests under study
6/22/2017 APS/SRP Stakeholder Meeting for Transmission Planning

44. 4.C. Interconnection Requests (Generation)
A. EAST VALLEY
2- Solar Projects 98MW
1- Battery Storage 10MW
2- Gas Projects 1084MW
B. EMA 115kV AREA
1- Solar Project 9MW
Generation Interconnection Requests listed on this slide are for SRP solely owned transmission A B
6/22/2017 APS/SRP Stakeholder Meeting for Transmission Planning

45. 4.D.-E. SRP - Transmission Service and Economic Study Requests
SRP received one Transmission Service Requests
There are no Economic Study Requests
6/22/2017 APS/SRP Stakeholder Meeting for Transmission Planning

46. 4.F. Submittal of Additional Study Plan Proposals
If you have study ideas for SRP to consider, please send a detailed message to:
Please include (at a minimum):
Your Name/Company/contact info ( /phone #)
What the purpose of the study request is? And how will the results be used?
What year(s) and season(s) is of interest?
What type of study – reliability (power flow only?), economic?
6/22/2017 APS/SRP Stakeholder Meeting for Transmission Planning

47. 4.G. SRP Planning – Comments & Questions
Stakeholder comments/questions on 2016 Study Results
6/22/2017 APS/SRP Stakeholder Meeting for Transmission Planning

48. 5. Stakeholder Questions & Comments
Open discussion
Reference Material
WestConnect –
APS OASIS –
SRP OASIS –

49. 6. Action Items
Review any action items, assignments, and due dates