2013 Alternative Transmission Development
Robert H. Easton
March 17, 2004
RMATS Stakeholder Meeting
Iterative Process to Finalize Alternatives
First priority will be Alternatives 1 and 2, then Alternatives 3 & 4
RAWG
TAWG
Fine-tune alternatives
Identify transmission solutions for
each alternative
Identify resource additions
for each alternative
- Iterate with modelers for economics
Determine capital costs for
new resources
- First-pass technical review
2. Congestion
and LMPs w/
new resources
Determine capital costs for
transmission
3. Iterate to define needs
5. Test tx solutions
1. Resource alternatives
Modeling Team
4. Provide transmission
solutions
Determine congestion/LMPs with new resources added
- If no new transmission is added and if existing constraints
are removed
Iterate to define transmission needs (variable cost basis)
Test transmission solutions provided by TAWG
Critical path to be able to start this modeling ( RAWG) - Decide adjustments, if any, to load forecasts (outside RM); resolve any locational issues for new generation
resources; create coal price “buckets” by type of mine; decide transmission solutions for 2008 that should be
included in 2013 studies.
TAWG Solutions – Alts. 1 & 2
Path
Alternative 1
Alternative 1
Line
Incremental
Improvement
(MW)
C Wyoming
1-345 kV Reno to DJ
Cheyenne
1-345 kV Reno to LRS
700 MW
TOT 3
1-345 kV Cheyenne to Ault to
Green Valley
1-345 kV Reno to LRS to Ault
to Green Valley
1000 MW
WY - LRS
1-345 kV DJ-LRS
700 MW
TOT 4A
1-345 kV Bridger to Miners to
Cheyenne
500 MW
Bridger West
1-345 kV Bridger to Midpoint
800 MW
Bridger West
1-345 kV Bridger to Naughton
to Ben Lomond
1-230 kV Midpoint to Boise
700 MW
West of
Naughton
345/230 kV at Naughton
500 MW
West of
Broadview
1-345 kV Colstrip to Reno
1-345/230 kV at Reno
2-345/230 kV at Colstrip
1-345 kV Treasureton to Ben
Lomond
1000 MW
Alternative 2
162 miles
Colstrip
Reno
Existing 345 kV
New 345 kV
70 miles
Boise
146 miles
DJ
106 miles
345 miles
76 miles
Midpoint
LRS
Treasureton
65 miles
Cheyenne Tap
110 miles
120 miles
60 miles
Naughton
Ben Lomond
Bridger
Miners
Ault
115 miles
70 miles
190 miles
Green Valley
Alternative 1 & 2 Estimated Costs
• Total Line Miles = 1658
• At $500,000/mile for 345-kV construction
• Total Est. Cost = $829 million
Alternative 3 – Option 1
Transmission
Configuration
Definition
Incremental
Increase
(MW)
Solutions from Alt 1&2
Amps Line – Add a Phase Shifter
230 kV Midpoint to Boise
IPP DC
Upgrade IPP DC
500
West of Colstrip
Colstrip Transformer 500/230 kV
Colstrip to Broadview – Increase Series Compensation
500
Montana to Northwest
500 kV Broadview to Garrison tap
500 kV Broadview to Ringling – Increase Series Compensation
500
500 kV Broadview to Hot Springs to Ashe
1000
500 kV Chief Jo to Monroe
1500
500 kV Bridger to Borah
Bridger to Midpoint - Convert from 345 kV to 500 kV
1000
500 kV Bridger to Ben Lomond (add as needed)
500 kV Ben Lomond to Midpoint (add as needed)
1000
Idaho to California
500 kV Midpoint to Table Mountain to Tesla
1000
TOT 3
345 kV Reno to DJ to LRS to Cheyenne Tap to Ault to Green Valley
345 kV Reno to LRS
500
TOT 4A
345 kV Bridger to Miners to Cheyenne
500
Rocky Mountain to
California
SWIP to STEP
1200
Bridger West
Ash
Hot Springs
Great Falls
Colstrip
Garrison
Taft
Missoula
Ringling
Broadview
Reno
DJ
*IPP DC
Midpoint
Bridger
Borah
Table Mt.
&
Tesla
Ben Lomond
LRS
Cheyenne
Tap
- Series Compensation
Ault
- Existing
- “New” 500 kV
- “New” 345 kV
Alternative 3 – Option 1
Green
Valley
Alternative 3 – Option 2
Incremental
Increase
(MW)
Transmission Configuration
Definition
Solutions from Alt 1&2
Amps Line – Add a Phase Shifter
230 kV Midpoint to Boise
IPP DC
Upgrade IPP DC
500
Montana to Wyoming
Colstrip Transformer 500/230 kV
Colstrip to Broadview – Increase Series Compensation
500
West of Colstrip
500 kV Broadview to Garrison tap
500 kV Broadview to Ringling – Increase Series Compensation
500
500 kV Ringling to Borah
1000
Bridger West
500 kV Bridger to Borah
500 kV Bridger to Naughton to Ben Lomond
500 kV Ben Lomond to Borah
Convert Borah to Midpoint 345 kV to 500kV
500 kV Borah to Midpoint
1000
Idaho to Northwest
500 kV Midpoint to Grizzly
1000
Utah to Market Place
500 kV Ben Lomond to Mona to Red Butte to Market Place
1000
Idaho to California
500 kV Midpoint to Table Mountain to Tesla
1000
TOT 3
345 kV Reno to DJ to LRS to Cheyenne Tap to Ault to Green Valley
345 kV Reno to LRS
500
TOT 4A
345 kV Bridger to Miners to Cheyenne
500
Rocky Mountain to California
SWIP to STEP
1200
Garrison
Taft
Colstrip
Ringling
Broadview
Missoula
Reno
DJ
To Grizzly
Midpoint
LRS
Borah
Bridger
*IPP DC
Cheyenne
Tap
Naughton
SWIP
To
STEP
Ben
Lomond
Red Butte
Market Place
Mona
- Series Compensation
Ault
- Existing
- “New” 500 kV
- “New” 345 kV
Alternative 3 – Option 2
Green
Valley
Alternative 3 Estimated Costs
• Total 345-kV Line Miles = 652
• At $500,000/mile = $326 million
• Total 500-kV Line Miles Option 1 = 1780
• At $1 million/mile = $1.8 billion
• Total 500-kV Line Miles Option 2 = 2277
• At $1 million/mile = $2.3 billion