Bob Easton WAPA-RMR Planning Manager

September 1, 2010

• Transmission in West• Line Separation• TOT3 Example• Control Areas• Congestion/Expansion• Questions

AGENDASeptember 1, 2010

Subregional Planning Group Footprints

(2015)

(2015)

(2015)

(2018)

(2013)

(2010-2017)

(In-service dates)

Review of Transmission Development in

Wyoming

Routes shown are for illustrative purposes only & will befinalized following the permitting and siting process

5

Wyoming Collector System Report February 2, 2010

Available on the WIA’s site at: www.wyia.org

Task Force Members

6

Background: Qualified Resource Areas (QRAs)

Source: WREZ Phase 1 Report 2009

Wind Resource Development Scenario #1

Wind Resource Development Scenario #2

10

Collector System Example

Feeder

11

Laramie River Station

Existing sub-station

New sub-station

Generation Feeder Line

Integrated Network Line

Transmission Export Line

Conceptual example of a compact Collector System design

Wind Generation

New sub-station

Natural Gas GenerationAdvanced Coal Technology Generation

Existing Wyoming Transmission System and Export Projects

Preliminary Cost Estimates

Wind HubSubstation

Wind Farm 2300–400 MW

Wind Farm 3300–400 MW

Wind Farm 4300–400 MW

WH – TEH line

Wind Collector System

500 kV at $2 million/mile

500 kV Substationat $75 million

High CapacityExport Line

500/34.5 kV Transformer

500/230 kV Transformer

500/230 kV transformerat $15 million

40 miles of 230 kVat $1 million/mile

WF1 – WH 230 kV line

WF2 – WH 230 kV line

WF3 – WH 230 kV line

WF4 – WH 230 kV line

34.5 kV WF1POI Bus

34.5 kV WF2POI Bus

34.5 kV WF3POI Bus

34.5 kV WF4POI Bus

Wind Farm 1300–400 MW

230/34.5 kV Transformer

230/34.5 kV Transformer

230/34.5 kV Transformer

230/34.5 kV Transformer

TEH Substation

Wind FarmSubstation

Wind HubSubstation

Wind Farm 2300–400 MW

Wind Farm 3300–400 MW

Wind Farm 4300–400 MW

WH – TEH line

Wind Collector System

500 kV at $2 million/mile

500 kV Substationat $75 million

High CapacityExport Line

500/34.5 kV Transformer

500/230 kV Transformer

500/230 kV transformerat $15 million

40 miles of 230 kVat $1 million/mile

WF1 – WH 230 kV line

WF2 – WH 230 kV line

WF3 – WH 230 kV line

WF4 – WH 230 kV line

34.5 kV WF1POI Bus

34.5 kV WF2POI Bus

34.5 kV WF3POI Bus

34.5 kV WF4POI Bus

Wind Farm 1300–400 MW

230/34.5 kV Transformer

230/34.5 kV Transformer

230/34.5 kV Transformer

230/34.5 kV Transformer

TEH Substation

Wind FarmSubstation

Notes:1. Costs are preliminary estimates of material and labor; costs do not include financing, right-of-way acquisition, or permitting.2. Costs could vary widely based on refinement of collector system designs, additional studies, and (or) level of wind generation

curtailment deemed acceptable.

Comparing Collector System Configuration Alternatives

Cost Estimates (nominal $ Billions)

Approximate Total Line Miles Collector

System Configuration

Design Type Resource

Scenario #1 Resource

Scenario #2 Resource

Scenario #1 Resource

Scenario #2

Single Circuit $2.48 $2.84 1,460 1,709 Radial

Double Circuit $3.34 $3.90 1,840 2,178

Networked WHs Minimal Double Circuit $2.93 $3.39 1,683 1,914

Networked WHs & TEHs

Minimal Double Circuit – Version 1 $3.07 $3.55 1,721 2,039

1

• Collector system design candidates for collecting up to 12 GW of wind based on reliability characteristics and preliminary costs.

• Line Separation

Typical 500-kV Transmission Structure

“Minimalist” Separation Distance

“Span-Length” Separation

No “One-Size Fits All”

• Reliability Perspective – Further Apart to Minimize Possible Simultaneous Outages

• Further Apart – Land Use/Environmental

• Public/Stakeholder Input

• State/Regional/National Interests

No “One-Size Fits All”

• Redundancy Leads to more Stable Network

• One-Span Length Cuts down the Probability of a Wire being Swung from One Circuit to the Other

• Terrain – Mountainous vs. Farmland

• TOT3 Example

WECC Constrained Paths

BUCKLEY

SUNDANCE

FT. PECK

PEACE CANYON

MICA

VANCOUVER

SEATTLE

PRINCE RUPERT

AREA

AREA

COLSTRIP

BOISE

PORTLANDAREA

MALIN

TABLE MTN

ROUND MTN

SALT LAKECITY AREA

MEXICO

EL PASOAREA

DEVERSLUGO

SAN FRANCISCO

MIDPOINT

AREA

LOS ANGELESAREA

ALBUQUERQUEAREA

NAVAJO

DENVERAREA

MOJAVE

HOOVERPHOENIX

AREA

LANGDON

HOT SPRINGS

HELLSCANYON

CHIEF JOSEPH

BURNS

PINTOFOURCORNERS

SHASTA

LANGDON

CANADA

UNITED STATES

6665

14

8

30

49

31

19

22

34

47

3

35

18

1720

23

36

45

46

5051 4

8

48

Transmission Paths

TOT-3 TTC/ATC Calculations

TOT3 Ownership CapacityMBPP – 70.5% 1132Western – 24.93% 475T. State – 0.83% 13PSCo – 3.74% 60

1680

COLORADO

NEBRASKAWYOMING

LRSG

ARCHER

AULT

STEGALL

SIDNEY

N.YUMASTORY

GPAWNEE

345KV230KV115KV

TOT3 MAJOR LINES

TOT3

400 MW

700 MW

COLORADO

NEBRASKAWYOMING

LRSG

ARCHER

AULT

STEGALL

SIDNEY

N.YUMASTORY

GPAWNEE

345KV230KV115KV

TOT3 MAJOR LINES

OUTAGE!LOADs to 100%

LOW VOLTAGE

TOT3

0 MW

1000 MW

COLORADO

NEBRASKAWYOMING

LRSG

ARCHER

AULT

STEGALL

SIDNEY

N.YUMASTORY

GPAWNEE

345KV230KV115KV

TOT3 MAJOR LINESOVERLOAD

TOT3

450 MW

850 MW

200 MW injection W

COLORADO

NEBRASKAWYOMING

LRSG

ARCHER

AULT

STEGALL

SIDNEY

N.YUMASTORY

GPAWNEE

345KV230KV115KV

TOT3 MAJOR LINES

OUTAGE!OVERLOAD/INSTABILITY

LOW VOLTAGE

TOT3

0 MW

1200 MW

August 14, 2003

• Control Areas

RMR Dispatch Floor

Not to Scale

PRESCHEDULING

TSS

AGCSWITCHING

Role of Balancing Authorities

• Monitor Boundaries• Controlled,

Scheduled Interchange

• Balance Generation and Load

• Support Interconnection Frequency

6059 61

LOAD GEN

Transmission Switching Desk

Outage Coordinator – Aligns Maintenance, WECC, and other utilities

Clearances, Hot line Orders, Voltage Control Substations, Snowcat, and Helicopter

monitoring Outages, Callouts, and Emergency Response

AGC and Reliability Desk

Balance WACM generation and load (AGC) Maintain scheduled system frequency Monitor and verify Interties Maintain and activate system reserves Operate the DC ties

Transmission Scheduling and Security Desk

Real-time power scheduling via E-tag systems Operate Constrained Paths Next hour’s Interchange Target Direct unscheduled flow procedures Operate Phase Shifting transformers

Transmission Scheduling & Security

• Prescheduling– Work 1 to 4 days ahead of Real-Time– Work with other Preschedulers & Power Marketers– Process E-Tags

• Review & Approve (or Deny) Tags created by marketing customers (Purchasing/Selling Entities)

• Primarily checking for Transmission Rights (proper OASIS reservations), Losses, properly formatted E-Tags

• Check-out daily totals with Internal & External customers (within WACM and next-door BA’s)

• Congestion/Expansion Planning

January 2008 Monthly Average

LMP $4 Gas

NELWAY

BRIDGER

COLS TRIP

G OSHEN

BORAH

KINPORT

M IDPOINT

SUM MERLAKE

MALIN

CAPTJACK

M ERIDIAN

ALV EY

ALLSTON

KEE LER

PEARL

RO UNDM T

O LINDA

JOHN DAY

MARION

LANE

G RIZ ZLY

BUCKLEY

THEDALLES

OSTRANDER SL ATT

M cNARY(11 69 M W)

BOARDM AN

PAUL /CENTRALIA

RAVER

MONROE

CUSTER

ECHOLAKE

CHIEFJO E GRAND COULEE

SC HULT Z

HANF ORD

ASHE

VANTAG E

LOWMON

L ITGO OSE

LOWGRANITE

TAFT

G ARRISON

DWO RSHAK

TOWNSENDBROADVIEW

BELL

DIXO NVILLE

BENL OM OND

NAUGHTON

ANACO NDA

AT LANTICCIT Y

ROCKSPRINGS

M ONUM ENT

MUST ANG

SPENCE

BILL INGS

YELL OWTAIL

CUSTER

G REATFALLS

OVANDO

HOTSPRINGS

CABG ORGE

NOXON

LOLO

HELLSCANYON

RO UNDUP

O XBOW

BR OWNLE E

BO ISE

ENTERPRISE

WALLAWALLA

LAG RANDE

HATW AI

M OS COW

BENEWAH

RIVERTON

BUFFALO

OREG ONBASIN

THE RM OPOLIS

WYODAK

CASPER

SHERIDAN

PLAT TE

DAVE J OHNSTON

M ILES CITYDC TIE

GRANTSPASS

COPCO

LONEPINE

RO SS

ONTARIO

CALDWELLBURNS

WANETA

BOUNDARY

VACA-DIXO N

TRACY

TESLA

TABLEMT

LOSBANOS

MOSSLANDING

TERM INAL

MONA

FOUR CO RNERS

90SOUTH

CAMPWIL LIAM S

BONANZA

HUNT INGTO N

SIGUR D

IPP

GO NDER

HARRYALLEN

MACHACEKFTCHURCHILL

AUS TIN

PAV ANT

HUNT ER

SYLM AR

ADE LANTO

GLENCANYON

VALM Y(562 M W)

HUM BOLDT

TR ACY

VALLEYROAD

CROSS -OVER

AMPS

JEFFERSON

DILLONPETERSONFLATS

DR UM

WEEDJC T

CASCADE

RESTON

O LYMPIA

INGLEDOW

ROCKYREACH

M IDWAY

LIBBY

HUNGRY HORSE

CRAIG

SAN JUAN

HAYDEN

LARAM IERIVER

ARCHER

AULT

RIFLE

M ONTROSE

PINTO

CURECANTI PONCHA

SIDNEY

STORY

L E G E N D :

500K V

+-500KVD C

345K V230K V115-161KV

LANGE

WE STHILL

ST EGAL

COMA NCHEMID WAY

DANIE LS PARKMALTA

SM OKY HILL

PAWNEE(53 0 MW)

VALM ONT

DILL ON

BEAVER

WARNERHILL TOP

BORDERT OWN

REDBUTT E

FLAM INGGO RG E

TREASURETON

K-FALLSCO G EN

BO YLE

NLEW IS TON

DIABLO

G ATES

M IDWAY

RINAL DI

VINCENT

VICT ORVIL LE

LUGO

M IRALOM ASERRANO

VALLEY

DEVERS

MIG UEL IM PERIALVALLEY

M OJAV E

EL DORAD O

M CCULLOUGH

MEAD

M ARKETPLAC E

NAVAJ O

MO ENKO PI

YAVAPAI

TABLE M ESA

PALO VERDE

WE STWING

FLAG STAFF

PINNACLE PEAK

CHOLLA

NORTH G ILA LIBERTY

KYRENE SILVERKING

CORONADO

SO UTH

BICKNELL VAIL

G REENLEE

SPRINGERVILL E

SAG UARO

TORTOLIT A

PARKER

PRESCOTT

ROUNDVALLEY

SELIG M ANDAVIS

CAMINO

EAG LEM T.

BLYT HE

KNOB

G ILATIJ UANA

M ETROPOL IJUAREZ

LOM AS

CIPRE S

LAROSIT A

SAN LUIS

M EXIC ALI

INT ERGENSEM PRA

M ERIDIAN

CHEEK YE

MALASPINA

DUNSM UIR

SAHT LAM

GOLD R IVER

ARNOT T

CLAYBURN

RO SEDALE

WHALEACH

BRIDG ERIVER

NICOLA

KELLYLAKE

100 M ILEHOUSE

SO DACREEK

BARLOW

WILLIST ON

GLENANNAN

T ELKW A

SKE ENA

PRINCE RUPERT

KITM AT

KEM ANO

SAVONA

MICA

REVELS TOKE

ASHTONCREE K

SELKIRK CRANBRO OK

INVERM ERE

NAT AL

PEIGAN N. L ETHBR IDGE

LANGDON

JANETSARC EE

REDDEER

BENALT O

BRAZEAU

BICKERDIKE KEEPHILLSELLERSLI E

W. BROOKS

WAREJTN. JENNER

EM PRESS

SHEERNESS

EAST EDM ONTO NCLO VERBAR

LAMO UREUX

DEERLAND

WHITEFISHLAKE

M ARG UERITELAKE

RUTH LAKE

MITSUE

N. CALDER

N. BARRHEAD

LITT LESM OKY

LOUISECRE EK

SAGITAWAH

WABAM UNSUNDANCE

MCKINLEY

P.E.G .S.

AMBROS IA WESTMESA

B-A

NORTON

OJ O

TAO S

BLACKWATER

ARTESI AAMR AD

CALIENTENEWM AN

ARRO YO

DIABLO

LUNA

HIDAL GO

LE UPP

EL CENTRO

KENNEDY

PEAC E CANY ON

PEACE R IVER

BATTL E RIVER

M ETISKO W

LEUPP

ELCENTRO

KDY 5CX3

PCN500

GMS500

BAT RV79

METI S644

LEUPP

ELCENTRO

KDY 5CX3

PCN500

GMS500

BAT RV79

METI S644

No congested

paths!

June 2008 Monthly Average LMP$4 Gas

NELWAY

BRIDGER

COLSTRIP

GOSHE N

BORAH

KINPORT

M IDPOINT

SUM MERLAKE

M ALIN

CAPTJACK

M ERIDIAN

ALVEY

ALL STON

KEELER

PEARL

ROUNDM T

OLINDA

JOHN DAY

M ARION

LANE

GRIZ ZLY

BUCKLEY

THEDALLES

OSTRANDER SLAT T

M cNARY(1169 M W)

BOARDM AN

PAUL /CENT RALIA

RAVER

M ONROE

CUSTER

ECHOLAKE

CHIEFJOE GRAND COULEE

SCHULT Z

HANFORD

ASHE

VANTAG E

LOWM ON

LITGOOSE

LOWGRANITE

TAFT

GARRISON

DWORSHAK

TOWNSENDBROADVIEW

BELL

DIXONVILLE

BENLOM OND

NAUG HTON

ANACONDA

ATLANTICCITY

ROCKSPRINGS

M ONUM ENT

M USTANG

SPENCE

BILLING S

YELL OWTAIL

CUSTE R

GREATFALLS

OVANDO

HO TSPRING S

CABGO RGE

NOXON

LOLO

HELLSCANYON

ROUNDUP

OXBOW

BROWNLEE

BO ISE

ENTERPRISE

WALLAWALLA

LAG RANDE

HATWAI

M OSC OW

BENEWAH

RIVERT ON

BUFFALO

OREGO NBASIN

THERM O POLIS

WYODAK

CASPER

SHERIDAN

PLATTE

DAVE JOHNSTON

M ILES C ITYDC TIE

GRANTSPASS

CO PCO

LONEPINE

ROSS

ONTARIO

CALDWELLBURNS

WANETA

BOUNDARY

VACA-DIXON

T RACY

TESLA

TABLEM T

LOSBANOS

MOSSLANDING

TERM INAL

M ONA

FOUR CORNERS

90SOUTH

CAM PWILLIAM S

BO NANZ A

HUNTINGTON

SIGURD

IPP

GONDER

HARRYALLEN

M ACHACE KFTCHURCHILL

AUSTIN

PAVANT

HUNTER

SYLM AR

ADELANT O

GLENCANYON

VALM Y(562 M W)

HUM BOL DT

TRACY

VALLE YROAD

CROSS-OVER

AM PS

JEFFERSON

DIL LONPET ERSONFLATS

DRUM

WEEDJCT

CASCADE

REST ON

OLYM PIA

ING LEDOW

ROCKYREACH

M IDWAY

LIBBY

HUNGRY HORSE

CRAIG

SAN JUAN

HAYDEN

LARAMIERIVER

ARCHER

AULT

RIFLE

M ONTROSE

PINTO

CURECANTI PONCHA

SIDNEY

STORY

L E G E N D:

500K V

+-500KVD C

345K V230K V115-161K V

LANGE

WESTHILL

STEG AL

COM ANCHEM IDWAY

DANIELS PARKMALTA

SM OKY HILL

PAW NEE(530 M W)

VALMONT

DILLON

BE AVER

WARNERHILL TOP

BORDERTOW N

REDBUTTE

FLAM INGGORGE

T REASURETON

K-FALLSCO GEN

BOYLE

NLE W ISTON

DIABLO

GATES

M IDWAY

RINALDI

VINCENT

VICTORVILLE

LUGO

M IRALOM ASERRANO

VALLEY

DEVERS

M IG UEL IMPE RIALVALLEY

M OJ AVE

EL DORADO

M CCULLO UGH

M EAD

MARKETPLACE

NAVAJO

M OENKOPI

YAVAPAI

TABLE M ESA

PALO VERDE

WESTWING

FLAGSTAFF

PINNACLE PEAK

CHOLLA

NORTH GILA LIBERTY

KYRENE SILVERKING

CORONADO

SOUTH

BICKNELL VAIL

GREENLEE

SPRINGERVILLE

SAGUARO

TORT OLIT A

PARKER

PRESCOT T

ROUNDVALLEY

SEL IGM ANDAVIS

CAM INO

EAGL EM T.

BLYTHE

KNOB

GILATIJUANA

M ETROPOLIJUAREZ

LOMAS

CIPRES

LAROSIT A

SAN LUIS

M EXICALI

INTERGENSEM PRA

M ERIDIAN

CHEEKYE

M ALASPINA

DUNSM UIR

SAHTLAM

GOLD RIVER

ARNOT T

CLAYBURN

ROSEDALE

WHALEACH

BRIDG ERIVER

NICOLA

KELLYLAKE

100 M ILEHOUSE

SODACREEK

BARLOW

WILLISTON

GL ENANNAN

TELKWA

SKEENA

PRINCE RUPERT

KITM AT

KEM ANO

SAVONA

M ICA

REV ELSTOKE

ASHTONCREEK

SELKIRK CRANBROOK

INVERM ERE

NAT AL

PEIGAN N. L ETHBRIDG E

LANGDON

JANETSARCEE

REDDEER

BENALT O

BRAZEAU

BICKERDIKE KEEPHILLSELLERS LIE

W. BROOKS

WAREJTN. JENNER

EM PRESS

SHEERNESS

EAST EDM ONTONCLOVE RBAR

LAMOUREUX

DEERLAND

WHITEFISHLAKE

MARGUERITELAKE

RUTH LAKE

M ITS UE

N. CALDER

N. BARRHEAD

LITTLESM OKY

LOUISECREEK

SAGITAWAH

WABAM UN

SUNDANCE

M CKINLEY

P.E.G .S .

AM BROSIA WES TMESA

B-A

NORTON

OJO

T AOS

BLACKWATER

AR TESIAAM RAD

CALIENTENEWM AN

ARROYO

DIABLO

LUNA

HIDALG O

LEUPP

EL CENTRO

KENNEDY

PEACE CANYO N

PEACE R IVER

BATT LE RIVER

M ETISKOW

LEUPP

ELCENTRO

KDY 5CX3

PCN500

GMS500

BAT RV79

M ETI S644

LEUPP

ELCENTRO

KDY 5CX3

PCN500

GMS500

BAT RV79

M ETI S644

Northwest to Canada

Congested Paths:

COI

Idaho to MontanaBridger West

Significant N-S Congestion

QUESTIONS?