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Study results northwest firmed resource option
Study ResultsNorthwest Firmed Resource Option

This slide deck contains results from the 2012 TEPPC Study Program related to the Northwest Firmed Resource Option Studies. The generation results for the associated transmission expansion projects follow immediately along with flow information for the added transmission.


Hydro Firming

Modeling Goal

  • Compare different hydro dispatches in different wind conditions given various modeling techniques

  • Compare path flows and production costs

  • Implementation Steps

  • Start with 2022 PC23 NW Resource Option (+12,000 GWh)

  • Increase WECC annual energy demand 8%

  • Add 12,000 GWh of renewables to NW

  • Under the purview of high wind in a particular region, investigate how a nearby region’s hydro responds based on different types of modeling

  • Investigate how the changes listed above impact path flows


Increase WECC-wide load 8%

1

Hydro

Add: 12,000 GWh to meet WECC RPS

Gas

2

3

Add: firming resource

4

Pumped storage

Add transmission

For these regions


Increase WECC-wide load 8%

1

8%

8% increase to peak and energy

10%

10% decrease to energy

Higher Load = Additional RPS Energy


Add 12,000 GWh to meet WECC RPS

2

Extrapolation Method


10 year study results ec27a nw firming study a ec27b nw firming study b
10-Year Study ResultsEC27a – NW Firming Study AEC27b – NW Firming Study B

Hydro


PC1-5

High Load

PC23

NW Resource Option

PC27a

NW Firmed Resource

PC27b

NW Firmed Resource

Shrum

Shrum

Shrum

Shrum

Mica

Mica

Mica

Mica

Revelstoke

Revelstoke

Revelstoke

Revelstoke

+12,000 GWh

(mostly wind)

+12,000 GWh

(mostly wind)

+12,000 GWh

(mostly wind)

+12,000 GWh resources

No added resources

+12,000 GWh resources

+12,000 GWh resources

Standard HTC modeling

Standard HTC modeling

Fixed shape hydro from PC1-5 (no resources)

HTC modeling with price signals from a windy Northwest

Compare

Results

Generation

Hydro impact

Path Flows

Compare

Compare


AZ, OR, CA, WA

Production cost decreased $27 M (.15%)

Dump energy increased 397 GWh (93%)

Emergency Energy decreased 6%

CO2 Emissions decreased 0%


AL, BC

Production cost decreased $6 M (.032%)

Dump energy increased 80 GWh (19%)

Emergency Energy decreased 0%

CO2 Emissions decreased 0%


PC23 vs. PC27b

Normal hydro

NW $ Hydro


Production cost decreased $22 M (.125%)

Dump energy increased 478 GWh (1649%)

Emergency Energy decreased 6%

CO2 Emissions decreased 0%


PC27a vs. PC27b

Fixed hydro

NW $ hydro



S-N

Less S-N flow

Congestion


k

k


k

k


2-weeks in April

2-weeks in October



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