How to build a share constraint?

[fabio.lanati]

Yes, of course the UC_COMPRD (with the % parameter) is defined on the LHS for each single region and not on their sum. But all the terms on the LHS and RHS are summed over regions. So for a minimum renewable share constraint we get (simplified, for each period t):

  SUM((r,p,c), VAR_FLO(r,t,p,c))  ≥  SUM((r,c), Share(t) × VAR_COMPRD(r,t,c))

Here, c is member of the electricity commodities. This translates into: Production of renewable electricity over all regions must be at least Share(t) × Production of all electricity produced over all regions.

So, as far as I can see it is exactly as you would want?

To put this in another way:  Here you just need to define the same Share-% value for the UC_COMPRD coefficient in all regions, and not define different values for each region.  Easy enough?

Thanks. 
if I understand correctly, by defining the constraint in this way, I impose the same LO share in all regions while there is no way to impose this % only on the sum, leaving the distribution of the constraint among the regions to the optimization. If I want a national share of renewable (e.g LO - 40%), each region of my model will have at least a 40% share. Right?