[LDES-coremodel] [LDES] updates on RPS and carbon cap tasks

[Sarah Kurtz]

I tried to see if I could find the cost that RESOLVE uses for this, but the RSP doesn’t allow build out of the transmission lines, and I didn’t manage to find the cost they would assume in any of the other scenario files. I was thinking I saw it somewhere, but I think that was in your previous SWITCH inputs, which was $1208/MW-km.

On Feb 7, 2021, at 11:57 PM, Julia Szinai <jszinai at berkeley.edu<mailto:jszinai at berkeley.edu>> wrote:

Thank you Kenji for sending this data!
I will start by adding the updated solar and wind costs to the db.

The transmission costs look great, and I'm glad we are not too far off in the average value we have currently in the db. Does it make sense to use the cost for the 500 kV line? I think currently SWITCH takes in one cost and doesn't distinguish between 345 vs. 500 vs. 765 kV.

On Sun, Feb 7, 2021 at 6:27 PM Kenji Shiraishi <kenjis at berkeley.edu<mailto:kenjis at berkeley.edu>> wrote:
Hi Julia,

I have reflected the ITC and PTC extensions for solar and wind in the attached cost file. Please let me know if you have any questions.

Also, after my review of transmission literature, I found that the transmission costs that we can easily use for the input for SWITCH model are the bulk transmission costs from the ReEDs document.
345 kV: $1,449/MW-km
500 kV: $837/MW-km
765 kV: $870/MW-km
(all the numbers are in $2010)
1) within California, multiply 2.25 with the number above.
2) between California and other WECC states, multiply 1.125 with those numbers.
3) within other WECC regions, use the transmission costs as they are.
(page 54 of https://www.osti.gov/biblio/1606151)

Recent transmission expansions in California are the Tehachapi Renewable Transmission Project. This project costs fit with the number above very well.
Tehachapi: $2.0 billion/173miles/4,500MW = $1,596/MW-km (500kV)

The costs I reported in the previous meeting from EIA and NREL were the costs of spur lines, not bulk transmissions. So they are rather connection costs, not bulk transmission costs. I am sorry for causing confusion.

Best regards,
Kenji


On Sat, Feb 6, 2021 at 10:29 PM Sarah Kurtz <skurtz at ucmerced.edu<mailto:skurtz at ucmerced.edu>> wrote:
Thank you for the update and for doing the work, Julia!  This sounds like great progress!
I look forward to hearing the results of the detective work next week - I hope the clues turn out to be easy to spot!

Sarah

On Feb 6, 2021, at 10:24 PM, Julia Szinai <jszinai at berkeley.edu<mailto:jszinai at berkeley.edu>> wrote:

Hi team,
I went through the current RPS policies state-by-state and updated the percentages for the SWITCH baseline input files. I made some simplifications because some states have different criteria for applying the RPS (by number of customers, utility type, load size, etc.) which don't correspond neatly with our load zone boundaries, but since it's really the carbon cap that is the binding constraint, these simplifications shouldn't matter.

I wrote up the policies and SWITCH implementation here<https://docs.google.com/document/d/1YZwKxv8_WFYBBP5WauEnpXcCGrrn31Jy-kdYEY1xo5o/edit>, and have attached the CSV of the data I added to the db. I also added the new carbon cap scenario to the db (WECC cap: 80% of 1990 levels by 2050, subtracting the carbon cap of CA each year, and CA cap: 0% carbon by 2045).

One of the next things on my to-do list was to update the renewable costs to include the PTC extension. Kenji, could you please send the update cost time series when you get a chance?

I'm also meeting with Paty early next week to work on figuring out the solar candidate capacity discrepancy.

Best,
Julia
--
Julia Szinai
PhD Candidate | Energy & Resources Group | University of California, Berkeley
Graduate Student Researcher | Lawrence Berkeley National Lab
NSF InFEWS Fellow
Energy & Resources Group, MS '17
Goldman School of Public Policy, MPP '17
University of California, Berkeley
jszinai at berkeley.edu<mailto:jszinai at berkeley.edu>
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--
Julia Szinai
PhD Candidate | Energy & Resources Group | University of California, Berkeley
Graduate Student Researcher | Lawrence Berkeley National Lab
NSF InFEWS Fellow
Energy & Resources Group, MS '17
Goldman School of Public Policy, MPP '17
University of California, Berkeley
jszinai at berkeley.edu<mailto:jszinai at berkeley.edu>

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