1. APS Deer Valley Facility Phoenix, Arizona June 18, 2015 9 AM -12 PM
APS/SRP 2nd 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

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
Peak Load Assessment – Summer
NERC STANDARD
STUDIES PERFORMED
TPL -001(n-0)
Thermal
Transient Stability
Post Transient
2019
PEAK X
MLSC
2024
TPL-002 (n-1)
PEAK (Lines, xfmrs, gens)
MLSC (Lines, xfmrs, gens)
TPL-003 (n-2)
Stuck Breaker/Breaker Failure
N-1-1
Bus Section
TPL-004 (n-xx)
Major Substations With/Without Generation
Common Corridor

7. 3.A. 2014 NERC Compliance Studies
Low Load Assessment
NERC STANDARD
STUDIES PERFORMED
TPL -001(n-0)
Thermal
Transient Stability
Post Transient
Near-Term
TO BE DETERMINED X
Long-Term
TPL-002 (n-1)
TRANSMISSION LINE
XFMR
GENERATION
REACTORS
TPL-003 (n-2)
Stuck Breaker
N-1-1
TPL-004 (n-xx)
Loss of All Generation Units at a Station
Common Corridor

8. 3.A. NERC Compliance 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 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 Near-Term Long-Term Year 1 (2016) 2
(2017) 3 4 5
(2020) 6 7 8 9
(2024) 10
Steady State
Peak Load (Summer) X
Peak load sensitivity
Off-Peak (Spring)
Off-Peak sensitivity
Stability ?

12. 3.A. 2016-2025 Ten-Year Plan Methodology
Coordinated Base Cases
2015HS – SASG/AZ coordinated case used to build heavy summer
2020HS – AZ coordinated case used to build heavy summer
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
Note: AZ coordinated cases also included IID

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

16. 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.

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

19. 3.B. 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?
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?

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

21. 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

22. In-Service:
Hassayampa-North Gila 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

23. 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

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

25. Bulk Transformer Additions/Replacements
Description
Year
Two 100MVAR Reactors at Four Corners 230kV
2015/2016
Trilby Wash 230/69kV Transformer (in-service)
2015
Sun Valley 500/230kV Transformer
2016
Mazatzal 345/69kV Transformer
2017
Prescott 230/115kV Transformer #3
North Gila 500/230kV Transformer
2018
Orchard 230/69kV Transformer
Orchard 230/69kV Transformer #2
Saguaro 230/69kV Transformer
2021

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

27. 3.C. Generation Interconnections
Active Generation Interconnection requests
APS OASIS contains Generation Interconnection Queue
2 Solar projects MW
1 Wind projects 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

28. A - HAA-NG 500kV line B - Gila Bend/Buckeye C – Metro Phx D - FC
1 projects
200 MW
B - Gila Bend/Buckeye
2 projects
654 MW
C – Metro Phx
595 MW
D - FC
1200 MW
E - Northern AZ
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

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

30. 3.E. Economic Study Requests
Currently no Economic Study Requests

31. 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:

32. 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

33. 12/18/2014 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: 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

34. 4.A. 2015 NERC Compliance Study Methodology
Coordinated Base Cases (Seed Cases)
2016 – AZ coordinated case used to build
2020 – AZ coordinated case used to build
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
WECC still hasn’t released a 2025 case, so there is still no case to even begin coordination. We still need to decide what will be done here
Are we using 2017 and 2021 NERC Compliance cases? We used 2016 & 2020 last year, so that’s what I’m guessing.
12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning

35. 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
Are we using 2017 and 2021 NERC Compliance cases? We used 2016 & 2020 last year, so that’s what I’m guessing.
Are we going to use the 2017 light spring case like APS?
12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning

36. 4.A. NERC Compliance Studies
NERC STANDARD
Type of Studies Completed
TPL-001 (N-0)
Thermal
Transient Stability
Post-transient
2017
Peak X
Low Load
High Import
2021
TPL-002 (N-1)
12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning

37. 4.A. NERC Compliance Studies
NERC STANDARD
Type of Studies Completed
TPL-003 (N-2)
Thermal
Transient Stability
Post-transient
2017
Bus outages X
Contingency of towers
Stuck breaker & protection system failure (SLG fault)
Common Corridor
N-1-1
2021
TPL-004 (N-X)
Substations with generation
Common Corridor/Substation without generation
Stuck breaker & protection system failure (3PHG fault)
Mention TPL takes effect in Jan. 2016
Note: TPL-003 Studies performed on Peak, Low Load & High Import cases
12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning

38. 4.A. NERC Compliance Results
2014 NERC Compliance Studies were finalized by beginning of November of 2014
2015 Progress
Case building under way
TPL effective 1/1/2016
SRP will perform the studies for TPL 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

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

40. 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
Is this still true? Is this slide needed for Q2?
12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning

41. 12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning

42. 12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning
4.B. SRP Ten Year Plan
SRP has Filed its Ten Year Plan as of January 30, 2015
12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning

43. 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

44. 12/18/2014 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
2016
HASSAYAMPA
JOJOBA
SPRINGERVILLE
(TEP)
KYRENE
2024
BROWNING
SILVER KING
PINAL WEST
DUKE
PINAL CENTRAL
SUNZIA (SWPG)
Central
New Mexico
2018
EXISTING LINES
FUTURE LINES
FUTURE 500kV SUBSTATION
EXISTING 500kV SUBSTATION
All Changes since January 2014 Ten Year Plan shown in red
12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning

45. 12/18/2014 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
WARD
ORME
TO APS OCOTILLO
LIBERTY (W.A.P.A.)
BROWNING
SANTAN
CORBELL
ANDERSON
Price Road
Corridor Project
KYRENE
RS-27
(TBD)
DOUBLE CIRCUIT, PHASE TIED LINE
KNOX
TBD
EXISTING 230kV CIRCUIT
RS-28
(2017)
DINOSAUR
FUTURE 230kV CIRCUIT
2017
SCHRADER
PFISTER
TBD
2021
EXISTING 230kV SUBSTATIONS
2021
FUTURE 230kV SUBSTATIONS
ABEL
GENERATING STATION
DESERT BASIN
TO SANTA ROSA (APS)
RANDOLPH
TO CASA GRANDE (APS)
PINAL CENTRAL
All Changes since January 2014 Ten Year Plan shown in red
12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning

46. 12/18/2014 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
ELLISON
PINTO VALLEY
GOLDFIELD
MIAMI
MOONSHINE
230kV
115kV
PINAL
TO THUNDERSTONE
CARREL
CARLOTA
SPURLOCK
230kV
(2019)
SUPERIOR
TRASK
OAK FLAT
KNOLL
RS kV
(2019)
RS KV
(2019)
RAY
2019
MORRIS
FUTURE SUBSTATION
KEARNY
EXISTING SUBSTATION
HAYDEN
BONNEYBROOK
(APS)
GENERATING STATION
ASARCO
FUTURE LINE
EXISTING LINE
COOLIDGE (W.A.P.A.)
TO APACHE (AEPCO)
TRANSFORMER
All Changes since January 2014 Ten Year Plan shown in red
12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning

47. 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

48. 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

49. 12/18/2014 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.
12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning

50. 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

51. 4.C. SRP Planning –Interconnection Requests (Transmission)
Currently there are no Transmission Interconnection Requests under study
12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning

52. 4.C. Interconnection Requests (Generation)
A. EAST VALLEY
2- Solar Projects 100MW
B. EMA 115kV AREA
3- Solar Projects 105MW
Generation Interconnection Requests listed on this slide are for SRP solely owned transmission A B
12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning

53. 4.D.-E. SRP - Transmission Service and Economic Study Requests
SRP received one Transmission Service Request
There are no Economic Study Requests
12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning

54. 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?
12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning

55. 4.G. SRP Planning – Comments & Questions
Stakeholder comments/questions on 2015 Study Results
12/18/2014 APS/SRP Stakeholder Meeting for Transmission Planning

56. 5. Stakeholder Questions & Comments
Open discussion
WestConnect –
APS OASIS –
SRP OASIS –

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