Review of investment limits

[HauHe]

The model contains for several technologies limits on the annual investment. NU, SO, WI.
It would be good to create an overview of these limits.
For wind and solar the limits are currently set in relation to the countries electricity demand, i.e. countries with more electricity demand can add more per year.
However, there are some cases where the addition of nuclear seems to be very fast, and for solar it might be somewhat too slow.

• Create file with overview of limits
• Reduce nulear investment limits
• Relax solar investment limits
• Limit NU investment in PL after 2041
• Review WI investment limit in LT

[HauHe]

In the documentation (DOI: 10.2790/97596) p. 91 of JRC-TIMES I encountered that they have implemented increasing capital cost for the case that the model adds more new capacity than a defined threshold in a year. Haven't read the literature that they are citing, but if this approach considers potential scaling effects that might occur for some technologies this could be a good way to avoid large annual capacity additions.
For now these approach might be to sophisticated. But perhaps with the new user defined constrain option this could be implemented.