# Presentation: 534103

## DOEWorkshop on Designation of National InterestElectric Transmission Bottlenecks

**Transmission Planning in the West****Steve Waddington****July 14, 2004**

## Existing System

**SP15**

**Existing System**

**Total Capacity in MW as of 1/1/00**

**Total **

**MWs**** **

**= 158,889**

**On Existing Transmission System**

- JB

- MT

- Snake

- ID

- Utah

- WY

- Colorado

- CHB

- AZ

- NM

- Alberta

- WA

- Colstrip

- Mexico

- Oregon

## Transmission Constrained Generation

**Transmission Constrained Generation**

- Alberta

- Central
- California

- N.
- Nevada

- Utah

- Wyoming

- SE
- Idaho

- Colorado

- S.
- Nevada

- Arizona

- Jim
- Bridger

- East
- Colorado

- Four
- Corners

- Snake

- Northern
- California

- Idaho

- Oregon

- WA

- MT

- Oregon

- Southern
- California

**Histogram flow data derived from unconstrained average water- medium gas 2008 scenario **
***Note: data represent theoretical upper bound on where power “wants” to flow if flows are unconstrained***

- Vertical blue bars - indicate forward capacity limits &  red bars indicate reverse capacity limits of  path.  Black bars indicate zero axis

- East
- WA

- British
- Columbia

## Background map courtesy of Western Electricity Coordinating Council

**Background map courtesy of Western Electricity Coordinating Council**

## Regional and Sub-Regional Transmission Planning in the West

***Regional and Sub-Regional Transmission Planning in the West***

**Notes:**
Sun-Regional Planning Groups to help get implementation going
Local Stakeholder Involvement and Review - Division of Labor 
Can examine incremental additions and individual projects to fit participant specific interest level
Granularity and detail of data and projects
More involvement at local level, Representative involvement at Regional Level, more parties to help and more projects examined
Closer Identification of Costs & Benefits to Local Participants
Participant Costs/Benefits identified more clearly to parties and their approving regulatory jurisdictions
Less likely to have jurisdictional uncertainty if sub-region is not in multiple states or jurisdictions
Participants match Interests, form Consortiums for Joint Efforts
Sub-Regional interests more aligned
Joint participation for both Regional and Sub-Regional projects
Clustering 
Overcoming 888 Queuing Problems
Local solutions to Sub-Regional Issues
Similar Environmental Issues, demographics, fuels, etc.

## RMATS - Transmission Solutions

***R******ocky ******M******ountain ******A******rea ******T******ransmission ******S******tudy***

## RMATS - Recommendation 1 Transmission Projects

- Antelope Mine

- Dave Johnston

- LRS

- Cheyenne Tap

- Ault

- Green Valley

- Miners

- Jim Bridger

- Naughton

- Ben Lomond

- Midpoint

**RMATS - ****Recommendation 1 Transmission Projects**

- Broadview

- Colstrip

- Added Series Compensation Only

- Taft

- Montana Upgrades

- Bridger Expansion

- New WY- CO lines

- Treasureton

- Garrison

- Townsend

- Borah West

- Path C

- West of Naughton

- West of Bridger

- Black Hills to C. Wyoming

- C Wyoming to LRS

- TOT 3

- TOT 7

- TOT 4A

- West of Colstrip

- West of Broadview

- Montana to NW

- 500 Wind

- 210 Gas

- 500 Coal

- 500 Wind

- 1150 Wind

- 700 Coal

- 359 Coal

- 50 Wind

- 250 Coal

- 280 Wind

- 125 Wind

- 575 Coal

- 100 Wind

- 575 Coal

- 140 Gas

- 250 Wind

- Added 345 kV Line

- Modified Interface

- Added Resource

## RMATS - Recommendation 2 Transmission Projects  Longer-term export options

- Tesla

- Table Mtn.

- Grizzly

- Ashe

- Bell

- Taft

- Missoula

- Great Falls

- Broadview

- Ringling

- Colstrip

- Ant Mine

- Dave Johnson

- LRS

- Cheyenne Tap

- Ault

- Green Valley

- Miners

- Jim Bridger

- Naughton

- Grand Junction

- Emery

- Mona

- IPP

- Red Butte

- Ben Lomond

- Borah

- Kinport

- Midpoint

- Boise

- Crystal

- Market Place

- 500 kV

- Additional DC

- 345 kV

- Adelanto

- Option 1

- Option 2

- Option 4

- Option 3

**RMATS - ****Recommendation 2 Transmission Projects **** *****Longer-term export options***

- Recommendation  1 facilities

- Noxon

- Hot Springs

- Option   1 only

- Option 2, 3, & 4 only

**This export alternative requires two- 500 kV lines**

- Added Phase Shifters

## Data for System Simulation

## Data required for identification of bottlenecks in the Western Grid

_**Historic data**_
- reflects current drivers such as generation & load patterns, transmission operating practices, reliability standards, business & pricing practices, market structure
- required to indicate where expansion is *possibly* needed & to benchmark models.
_**Input data & assumptions**_
- For modeling & simulation studies
- Needed to predict how the transmission grid will be loaded in future or assumptions change - load growth, new generation, fuel prices, usage patterns, business & market structures, & operating practices
_**Model output results**_
- Predict future transmission loadings, congestion, reliability issues, locational prices & cost/benefit impacts
- By aggregate and individual parties & sub-areas for cost/benefit allocation
- Needed for expansion or operating decisions
- Needed for policy & market design decisions

## Historic Data

- SSG-WI Historic Path Actual Loadings
- Actual flows reflect result of schedules, netting, existing contractual rights, reservation limitations & business practices
- Data is available for Critical Paths that have been identified as having past curtailment problems
- Schedules
- Contract Path requirements & usually doesn’t reflect loopflow
- May be limiting on paths before actual loadings under present WECC operating practices
- OASIS Reservation Requests
- Includes transmission needed to held open for reserves & backup

**Notes:**
See SSG-WI Study Report Framework for Expansion of the Western Interconnection Transmission System, October 2003,  page 14 

Path Actual flow loadings do not necessarily indicate the total loading limitations on a path.  Schedule and reservation limitations can restrict transmission use even when actual flows at the time appear low enough to allow additional loading.

Path Actual flow summary available from SSG-WI report

## Model Data for SSG-WI Study

- Scenarios & assumptions for future cases developed by the Technical Support Group - consensus
- Area load growth predictions
- From participants, WECC, IRPs, & States
- Local area diversities included
- Generation expansion levels & location scenarios from industry advocates of various resource types (including DSM)
- System transmission powerflow data
- WECC Data (NERC Reliability Council)
- Impedance & flow distributions, location of loads & generation, path ratings
- Public domain data using “typical data” from industry for market sensitive data
- Unit heat rates, fuel prices, hydro output curves, transmission cost effects
- Resource Planning Margin of 25% for all scenarios
- RTO “Like” Market Structure without seams assumed

**Notes:**
Other data includes operating data, planned outages, etc.

Expansion assumptions on location & capital cost include “do-ability” of acquisition of ROW for transmission, generation  & air permits for generation, etc
	Related cost differentials are included in expansion costs

## Model Output Data

- Expansion Costs
- Aggregate & individual
- Generation & Transmission Capital
- Predicted individual hourly path loadings
- Level & duration
- Generation performance & costs
- Aggregate & individual
- Variable Operating & Maintenance costs
- Fuel
- Regional, local, individual for scenarios & benchmark
- Locational costs for energy delivered at load busses

**Notes:**
For participants and coalitions to consider

For RMATS Stage II Financing Methods study to explore beneficiaries pay and other methods