Update electricity-grid.yaml

[sandrinecharousset]

add unit EUR_2020/MW to allow using this variable for extension not only of the line length but also of the line capacity

We could also create a new variable whcih I would have named Network|Electricity[Capital Cost for consistance with the investment costs in other technologies which are named Capcital Cost

[erikfilias]

add unit EUR_2020/MW to allow using this variable for extension not only of the line length but also of the line capacity

We could also create a new variable whcih I would have named Network|Electricity[Capital Cost for consistance with the investment costs in other technologies which are named Capcital Cost

Hello, the capital cost variables are in the technology.yaml file. I suggest moving these variables to the electricity-expansion.yaml file and adding this new variable as Capital Cost|Electricity|Network. Finally, I would rename the electricity-expasion.yaml file to invesment.yaml in order to keep the coherence that this file also comprises investment variables related to heat and hydrogen. @sandrinecharousset , @phackstock , How do you see it?

[sandrinecharousset]

@erikfilias sounds good to me
The variable name you propose is more consistent with other variable names
I am not fully satisfied with having only one capital cost for network expansion in capacity and in length , would be better to separate but could not find a good way of doing it
Regarding moving variables from technologies not sure it is a good idea as lots of other models do use these variables and not those in electricity focused yaml files so I would put the new variable maybe in technologies
Regarding electricity-expansion from what I remember this is describing variables that are results of electricity capacity expansion models no? No pb to rename it though but I wouldn’t put the capital cost there
@danielhuppmann ypu may have an opinion there also?
Best

[phackstock]

Thanks @sandrinecharousset and @erikfilias for the discussion and the inputs.
@sandrinecharousset I very much agree with you that we should split the variable in two to differentiate between line length and capacity.
For naming things I always like to err on the side of verbose but immediately obvious rather than trying to be clever but potentially misleading. Therefore I'd propose something like:

• Capital Cost|Electricity|Network Capacity
• Capital Cost|Electricity|Network Length

or something along those lines.

[danielhuppmann]

Thank you for the discussion. One point of caution (re the suggestion by @phackstock): the cost are not "per length", but in "capacity per length", so the suggested variable names can also be misleading.

So for simplicity, I suggest to go with the simple suggestion by @sandrinecharousset (but with a minor formatting fix to make sure that the nomenclature package parses the units correctly).

[sandrinecharousset]

@phackstock could you merge this so that we can upload datasets for the ws with the good unit?