Western Governors Association

1
Western Governors Association Electricity
Transmission Roundtable Western
States Electricity Transmission Highway
System Overview Rich Bayless Director
Transmission Systems Planning rich.bayless_at_pacific
orp.com May 9, 2001
2
Interstate Highway Infrastructure
3
Western Transmission Main Grid System
4
Congestion
5
WSCC Simplified Transmission Grid
6
Existing Western Interconnection System 2001 -
Capacity
British Columbia
Alberta
Mid C
HVDC
Snake
HVDC
COI
HVDC
HVDC
HVDC
HVDC
NP15
HVDC
4 Corners
SP15
Market
Palo Verde
HVDC
Existing Trans. Capacity
Market Hub
RSB 4/01
7
Existing Western Interconnection System 2001 -
Capacity
British Columbia
Alberta
Mid C
HVDC
Snake
HVDC
COI
HVDC
HVDC
HVDC
HVDC
NP15
HVDC
4 Corners
SP15
Market
Palo Verde
HVDC
Existing Trans. Capacity
Market Hub
RSB 4/01
8
Existing Western Interconnection System 2001 -
Capacity
British Columbia
Alberta
Mid C
HVDC
Snake
HVDC
COI
HVDC
HVDC
HVDC
HVDC
NP15
HVDC
4 Corners
SP15
Market
Palo Verde
HVDC
Existing Trans. Capacity
Market Hub
RSB 4/01
9
Western States Electricity Sales Historic Growth
10
Population Growth 1990 1999 U.S. Census Bureau
- 2001
18
20
13
Western Washington
Eastern Washington
10
25
Portland
17
24
Southern Oregon
22
Treasure Valley
6
35
Northern California
10
Reno
Salt Lake
26
30
11
24
10
Northeastern Utah
23
11
Southwestern Utah
Las Vegas
16
62
Southern California
13
State-wide Population Growth
30
15
lt15 15 - 20 21- 30 gt50
11
1999 Summer Peak from June 2000 WSCC Load
Resource Summary 129,059 MW
HVDC
Four Corners
Nav Glen
NavGlen
Arizona
12
2005 Summer Peak
British Columbia
Alberta
WA
Mid- Columbia
MT
Oregon
ID
SE ID
WY
WDL
N. NV
Northern California
Utah
Colorado
S. NV
Four Corners
Nav Glen
NavGlen
Southern California
Arizona
NM
Arizona
13
Summer Peak Estimated Growth to 2005
British Columbia
Alberta
WA
Mid- Columbia
Colstrip
MT
Snake
Oregon
ID
SE ID
WY
WDL
JB
Northern California
N. NV
CHB
Utah
Colorado
S. NV
Four Corners
NavGlen
Southern California
Palo Verde
Market
NM
2000
2005
Arizona
14
SE Idaho
ID
ID
WY
15
(No Transcript)
16
SE Idaho
ID
Southern California
17
Generation
With Additions by 2005 Under Construction,
Reported and Rumored
Total Additions 44,153 MW
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2005 Generation
With Additions Under Construction and Probable
Announced Additions included
Total Additions 18,000 MW
19
2005 Generation
With Wind and East Side Coal Additions Made
Possible with Infrastructure Additions
Total Additions 22,300 MW
20
WSCC Ten Year Plan New Planned Transmission
Miles in 10 Year Plan WSCC Significant
Additions Report
21
Infrastructure Expansion Example A Proposal for
Western Electricity Interstate Highway East Side
Backbone Infrastructure Expansion
Alberta
Mid C
HVDC
COI
HVDC
HVDC
HVDC
4 Corners
Proposed Expansion
Market
Palo Verde
HVDC
Existing Trans. Capacity
Proposed Trans. Capacity
Load Generation
Market Hub
RSB 4/01
22
Western Interconnection Transmission
Expansion Possible Generation Integration Connecti
ng to East Side Backbone Expansion
Mid C
800
Montana
140
Idaho
2000
600
COI
SE Id
200
Wyoming
500
600
100
Bridger
1000
No. Nevada
400
500
No. California
300
500
Utah
Denver
1200
200
1200
Integration Connections
Four Corners
Market
So. California
Backbone Expansion
Palo Verde
Phoenix
RSB 4/01
23
Summary

• The existing integrated main grid transmission
  system was developed to optimize Western load
  resource patterns and diversity
• Capacity delivery transmission developed between
  Phoenix and along the West Coast
• Energy delivery system developed in East Side of
  the Western Interconnection
• While load growth has occurred in many Western
  States, major new transmission and generation has
  not been added in the last several years
• New proposed existing generation additions are
  primarily gas-fired
• Transmission infrastructure additions are needed
  to allow integration of new East Side wind and
  thermal resources into the Western Interconnection