Detailed levelized cost

[Louis]

I cannot see how the the switch ANNCOST LEV could affect the objective function, other than by the constant term related to NCAP_PASTI capacity investments.  If you have defined NCAP_PASTI investments with investment costs, then there can indeed be a cosmetic difference, but otherwise there should not be any difference.  In other words, because the constant term does not affect the solution, there should be no genuine difference.

The constant term may be changed, because levelized annual costs imply that all investment costs should be allocated to the model periods, and for the past investments some of the costs would usually fall outside the horizon, and those parts of the costs are therefore excluded when using levelized annual costs. The objective function can be fully reproduced from the annual costs when using levelized annual costs, and using it does not genuinely affect the objective function (or model solution), but only the cost reporting.

Ok, i understand, there are ineed past investments. Also, is there any document describing how to compute the cost_inv values? I am trying to do this, but i can't find the correct formula

[Antti-L]

If you look at the  "Check LUMPINV" row in my Excel sheet, you should be able to see how to calculate it.  As you can see there, the value calculated from the LUMPINV values equals the reported Cost_Inv (INV & INV+). That's for the levelized Cost_Inv. The calculation of the standard Cost_Inv is fully according to the annualized payments formulas in the documentation.

[Louis]

If you look at the  "Check LUMPINV" row in my Excel sheet, you should be able to see how to calculate it.  As you can see there, the value calculated from the LUMPINV values equals the reported Cost_Inv (INV & INV+).  That's for the levelized Cost_Inv.  The calculation of the standard Cost_Inv is fully according to the annualized payments formulas in the documentation.

Ok, thanks a lot Antti-L!