Southwestern Public Service Co. (SPS)

Transmission Customer Meeting November 16, 2017

DISCUSSION TOPICS FOR TODAY • Xcel Energy & SPS System Overviews • Completed 2016 & 2017 Projects • 2018 and Beyond Projects • SPP’s Integrated Transmission Planning – A

Summary

• Transmission Line Ratings • New Modeling Standards • Dynamic Load Modeling • Questions and Adjourn

2

SYSTEM MAPS

Xcel Energy SPS

Northern States Power Co. Minnesota

(NSPM)

Northern States Power

Co. Wisconsin (NSPW)

Public Service Co. of

Colorado (PSCo)

Southwestern Public Service

Co. (SPS)

3

Area Construction Overview

4

2016-2017 TRANSMISSION SYSTEM ADDITIONS

BOWERS - HOWARD (W-67/Y-62)

6 40 miles, mixed 115/69 kV, completed Jan 2016

OCHILTREE - LIPSCOMB (W-50)

7 20 miles, 115 kV, completed April 2016

WHEELER – COBURN CREEK (W-78)

8 13 miles, 115 kV, completed June 2016

CURRY - BAILEY (W-69)

9 38 miles 115 kV, completed Oct 2016

CARDINAL – SAGE BRUSH (W89)

10 19 miles, 115 kV, completed Dec 2016

PCA-QUAHADA (W76)

11 13 miles, 115 kV, completed Feb 2017

WOOD DRAW – CHINA DRAW (W84)

12 14 miles, 115 kV, completed Jun 2017

CUSTER – PONDEROSA (W81)

13 11 miles, 115 kV, completed Jun 2017

CARLISLE - WOLFFORTH (K-99)

14 13 miles, 230 kV, completed Dec 2017

2016/2017 PROJECT COMPLETION UPDATE

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Grassland Intg. 230/115 kV Upgrade – ISD Feb 2016 Puckett West Breaker Additions– ISD March 2016 Happy Intg. 115/69 kV Autos Upgrade – ISD April 2016 Deaf Smith Intg. –230/115 kV Transformer Upgrades – ISD May 2016 Potash Junction 230/115 KV Auto Upgrade– ISD April 2016 Roadrunner 115 kV Static Var Controller (SVC) Addition – ISD April 2016 China Draw 115 kV Static Var Controller (SVC) Addition – ISD June 2016 Hitchland 345 kV Line Reactor Relocations – ISD April 2016 Andrews Co. Substation – Add 2 230/115 kV 168 MVA Autos – ISD May 2016 Andrews Co. Sub. – NEF Substation 115 kV line – ISD May 2016 Randall Co – Canyon West Sub 115 kV Reconductor – ISD May 2016 Atoka Sub and Eddy-Seven Rivers 115 kV Line - ISD Sept 2016 Cardinal Substation Project – ISD Oct 2016 Curry County 115 kV Bus Rebuild – ISD Dec 2016 Hobbs Gen – Higg 115 kV Line Tap and tap to Bensing Substation – ISD May 2017 Custer Mountain 115 kV Substation – ISD May 2017 Ponderosa Substation – ISD June 2017

ACTIVE and FUTURE PROJECTS

ROSWELL 115 kV LOOP

17 24 miles, 115 kV, estimated ISD Jan 2018

NE HEREFORD – LA PLATA 115 kV Project

18 8 miles, 115 kV, estimated ISD Jan 2018

PORTALES 115 kV LOOP

19 14 miles, 115kV, Estimated ISD Feb 2018

HOBBS – CHINA DRAW 345 kV PROJECT

20 90 miles, 345 kV, estimated ISD June 2018

CARPENTER – SUNFLOWER HARBINGER 345 kV PROJECT

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J07

J07

30 mi

Colorado

Texas

Oklahoma

Kansas

345 kV substation, interconnect with Sunflower, estimated ISD June 2018

COCHRAN – WHITEFACE 69 kV (115 kV)

22 4.5 miles, 115 kV const, oper 69 kV, estimated ISD 1st qtr 2019

MUSTANG - SHELL CO2 SUBSTATION

23 9 miles115 kV, estimated ISD Nov 2019

TUCO-YOAKUM-HOBBS 345 kV PROJECT

24 168 miles, 345 kV, estimated ISD Jun 2020

MUSTANG - SEMINOLE 115 kV LINE PROJECT

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S

S S

S S

S

S

S S S

S

S

S

S

S

S

MUSTANG INTG

S S S S

S

S

S

S

SEMINOLE INTG

S

New

115kV Line (17m

i.) K69

230kV Line 115kV Line 69kV Line

New Line Non Xcel Energy Line

T56

Y99 W

11 Y9 8

T89

W11

W1

3

W1

6

W14

K56

K55

V80 T5

7 Y95

Y99

W33

Mi 0

1 2 3 4 5

K69

17 Miles 115 kV Est ISD 6/2021

BAILEY – NEW AMHERST- LAMB 115 kV PROJECT

26 48 miles, 115 kV, estimated ISD Mar 2022

SE New Mexico Projects Map

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Power for the Plains Website

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http://www.powerfortheplains.com/ • Project descriptions • Routing maps, when available • General project information

QUESTIONS?