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Supply and Demand Curve do not matches. - Printable Version

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Supply and Demand Curve do not matches. - dikshant dhoj gc - 31-03-2023

Dear Sir, I am working on TIMES with 4 seasons (SI, S, W & WI) with 24 hours' time slices (D01 to D24) along with Run of River (ROR), Peaking Run of River (PROR), Storage (STR), Solar (SOL) and Import (IMP). I have added AF for Solar and Storage in BY_Trans. because for some time slice the values for the solar and storage need to be zero. Further the ROR, PROR and Import should be in such a way that they should supply for all the time slice, but I am getting values where for some time slices it is completely supplying with ROR and similar with other.  Also, while checking the fuel supply and demand curve they do not matches with each other. Would you please look into it and guide me with the same.


RE: Supply and Demand Curve do not matches. - Antti-L - 01-04-2023

The model files you attached were VEDA templates, and so I had to import them into VEDA and then generate the TIMES model from it.  > I have added AF for Solar and Storage in BY_Trans. because for some time slice the values for the solar and storage need to be zero. Yes, I can see that. It is a reasonable way of imposing a "max. load profile" for solar/wind/hydro plants. > Further the ROR, PROR and Import should be in such a way that they should supply for all the time slice, but I am getting values where for some time slices it is completely supplying with ROR and similar with other. I can see that you have not imposed any restrictions for the operation of the ROR/PROR plants, other than capacity. Therefore, the results are fully consistent with your model. Concerning ROR and Imports, in the results I can indeed see a few timeslices where the ROR plants or Imports are supplying 100% of the demand. However, I cannot see any timeslices where the PROR plants would be supplying 100% of the demand (the maximum appears 94% for PROR).  If you would like that  "they should supply for all the time slice", then why don't you impose such?  For example, if you mean that you would like to have ROR, PROR and Import all producing evenly throughout the year, you could simply define the processes supplying their inputs at the ANNUAL level. Anyway, I think you would need to impose at least seasonal profiles for them, either in terms of max/min loads, or by using fixed profiles, or maybe also by using ramp rates or the like. I tested imposing even load profiles, by defining the processes FTE-ELCROR, FTE-ELCPROR and IMPELC1 at the ANNUAL level, and while it works as such, the full demand can then be satisfied only in some timeslices, and so that would not be consistent either.  I then tested by defining only FTE-ELCROR and IMPELC1 on the ANNUAL level, and that worked already pretty well: the demand was fully satisfied in all timeslices, but there was overproduction in a few timeslices. But probably the "Peaking Run of River Power Plants" would also need to follow some inflow profile. > Also, while checking the fuel supply and demand curve they do not matches with each other. I checked the supply and demand curves, and they were 100% consistent, i.e. perfect match with each other.  So, I cannot confirm your statement.  (Maybe you forgot to take into account the efficiencies.) Concerning your costs, I would like to point out that they do not seem to make sense: you have ACT_COST (variable O&M costs) of 833.333 M$2021/TJ for all the hydro technologies.  This is 833,333 USD(2021)/GJ (close to million dollars per GJ), which does not make sense (it is $3000/kWh).  On the other hand, the price of your electricity imports is zero.


RE: Supply and Demand Curve do not matches. - dikshant dhoj gc - 02-04-2023

Thank you, Antti-L for the detailed suggestion.