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    Thread: xpress version and options
Post: RE: xpress version and options

It seems there a not so many Xpress users around; I think most ETSAP partners are using the GAMS/Cplex solver. I have no experience with Xpress either, but wonder whether the Xpress solver you are ...
Antti-L Questions 1 255 20-05-2022, 04:53 PM
    Thread: about storage processes
Post: RE: about storage processes

Hmm... but now I started wondering about your annual loss calculation. STG_LOSS is the annual loss. So, can you explain how you derived the value for the annual loss from the daily loss of 0.2%? D...
Antti-L TIMES 8 14,173 15-03-2022, 02:48 PM
    Thread: about storage processes
Post: RE: about storage processes

You should use the equilibrium loss method when the losses are large.  So, just define STG_LOSS = −17.52.  And I suggest also that please use TIMES v4.5.9 or above (the latest is v4.6.0).
Antti-L TIMES 8 14,173 15-03-2022, 02:44 PM
    Thread: The constraints of 2015 still work in 2020
Post: RE: The constraints of 2015 still work in 2020

If you are fixing input shares by FLO_SHAR(FX), please use interpolation option 1.  And similarly if you use NCAP_AFA(FX) (or NCAP_AF(FX)).  They have worked well for me. But you should also recall th...
Antti-L TIMES 2 837 22-02-2022, 12:11 AM
    Thread: TFM_UPD table
Post: RE: TFM_UPD table

AkramS> I thought the model would extrapolate the values for NCAP_COST in 2012 onwards, meaning that the model knows that NCAP_COST in 2050 and 2012 are equal. Well yes, the "model" (actually TIME...
Antti-L TIMES 18 5,138 28-12-2021, 03:20 PM
    Thread: TFM_UPD table
Post: RE: TFM_UPD table

AkramS>  Now I want in the MIG table of the later scenario file to change the invcost from 2050. Could this be a problem (that in the earlier scenario file there is not an "invcost" for the technology...
Antti-L TIMES 18 5,138 27-12-2021, 09:08 PM
    Thread: TFM_UPD table
Post: RE: TFM_UPD table

But still not working?  How can that be possible?   :shy: It sure does work here...
Antti-L TIMES 18 5,138 27-12-2021, 07:57 PM
    Thread: TFM_UPD table
Post: RE: TFM_UPD table

Ok, I tested myself with a technology, which has its efficiencies defined in a scenario file. I am seeing the TFM_MIG table working well, provided that the TFM_MIG scenario, which defines the modif...
Antti-L TIMES 18 5,138 27-12-2021, 07:32 PM
    Thread: TFM_UPD table
Post: RE: TFM_UPD table

Sure, yes, in my test it was. I think it may be important to specify the source scenario, to be sure the value is taken from the Subres as intended, because some other scenarios may also define some o...
Antti-L TIMES 18 5,138 27-12-2021, 02:24 PM
    Thread: TFM_UPD table
Post: RE: TFM_UPD table

As Amit has not responded, perhaps I can give some small suggestions, even though I am no VEDA expert. The "-0" in Year2 activates the Time-series filtering option, which I think can indeed be quit...
Antti-L TIMES 18 5,138 23-12-2021, 06:15 PM
    Thread: Non-negative restriction of summing constraint (UC_RHS)
Post: RE: Non-negative restriction of summing constraint...

1) You should remove the huge negative values for UC_RHST~LO. They serve no purpose, but may only cause some trouble (numerical problems for the solver). 2) I don't know how you have modeled your e...
Antti-L TIMES 5 4,360 11-11-2021, 03:41 PM
    Thread: Storage related attributes
Post: RE: Storage related attributes

> Basically, the column previously named NCAP_BND I renamed to NCAP_BND~2025 and added another column named NCAP_BND~2050 with the same values. Will this change make sure that the model can't invest i...
Antti-L TIMES 16 4,696 21-10-2021, 02:37 PM
    Thread: Storage related attributes
Post: RE: Storage related attributes

> Are there any TIMES attributes that can regulate input/output flows for a storage, which has no size estimation yet? Well, you could use e.g. FLO_SHAR(r,y,p,com,'ACT','ANNUAL','UP') = 1, to have th...
Antti-L TIMES 16 4,696 18-10-2021, 08:10 PM
    Thread: Storage related attributes
Post: RE: Storage related attributes

> Do you think the network storage is represented correctly in the attached file given the points above and the parameters I assumed for the storage in the file, table E29:F37? Well yes, it looks c...
Antti-L TIMES 16 4,696 15-10-2021, 04:18 PM
    Thread: Hydrogen
Post: RE: Hydrogen

Some overviews of interfaces:   ● GAMS Data Exchange with Other Applications (https://www.gams.com/35/docs/UG_DataExchange.html)   ● VEDA Results interfaces (https://veda-documentation.readthedocs....
Antti-L TIMES 2 1,235 18-09-2021, 05:33 AM