TAS Follow-up Webinar
Historical Year Energy Shape
Compromise for 2026 Common Case
December 14, 2015
Jim Filippi- TAS Chair
Tom Miller- TAS Vice Chair
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Agenda
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Welcome- Introduction (Jim)
WECC Anti-trust statement (WECC Staff)
Background from last TAS Meeting (Tom)
Proposed Compromise for 2026 Common Case (Kevin)
Discuss stakeholder need/timing for complete 2008
data in addition to Proposed Compromise data” (Jim)
– Process for preparing a proposal for 2008 data, if desired
• TAS Vote (Jim)
• Wrap-up (Jim)
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Background
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PURPOSE: is to discuss, consider, and vote on a proposed compromise in the
choice of energy shapes for use in the TEPPC 2026 Common Case.
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FOLLOW-UP: to the TEPPC/TAS discussions on the 2008 vs. 2009 energy shapes
where TEPPC reaffirmed TAS's majority vote to use year 2009 while encouraging
TAS to find a compromise on the choice of year to use for load, hydro, solar, and
wind energy shapes to use in the construction of the TEPPC 2026 Common Case.
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PROCESS
– Kevin Harris consulted with Northwest planners and developed proposed
compromise
– Reached out to Key Stakeholders and Experts to gain support
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OBJECTIVE: of the compromise proposal is to adjust NW hydro generation levels to
be more typical and in better alignment with Northwest Region planning needs,
while maintaining overall data integrity of the 2026 Common Case
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GOAL: Development of 2026 Common Case useful to all planning regions
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Compromise Proposal
Overview
Kevin Harris (Columbia-Grid)
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Concern
• BPA and the Council use 2008 for normal PNW
Hydro
• 2009 does not capture summer Hydro
generation in the PNW
• The primary area of concern between 2009
and 2008 is the summer (Jun-Aug)
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Compromise
• All Hourly shapes based on 2009 data
(Including PNW Hydro)
• Monthly generation for dispatchable Hydro
generation (PLF/HTC):
– Based on 2009 for all areas except the PNW
– For the PNW its based on 2009 except for Jun-Aug
where 2008 data will be used
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Impact to PNW Hydro
• Using 2009 for fixed hourly shapes results in no change to
approximately 30% of PNW Hydro generation
• The increase in PNW dispatchable generation ~2,033 aMW JunAug
Diff in NW Hydro~
aMW
Jun
2,202
Jul
2,628
Aug
1,275
Avg
2,033
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Discussion
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Need for Complete 2008 Data
• Discuss stakeholder need/timing for complete
2008 data in addition to Proposed
Compromise data”
– Process for preparing a proposal for 2008 data, if
desired
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TAS Vote
• Compromise PROPOSAL: For months of June-August ,
for Northwest hydro only, adjust monthly energies so
that Northwest hydro energies from 2009 to come in
line with 2008 historical levels.
 For all remaining load and energy shapes use 2009 data as
determined at TAS and TEPPC.
• The issue to be voted on will be either
– 1) to accept the compromise as presented at the webinar
or
– 2) to reject the compromise and use year 2009 energy
shapes as was previously approved by majority vote of TAS
and reaffirmed by TEPPC.
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Wrap-up
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TAS Vote Result
Need/timing for Complete 2008 Data
Next Steps
Other?
Close Meeting