Ramping costs

[GustafY]

Hi,

I have a problem with implementing ramping costs in my model. I have defined ACT_CSTRMP for several processes, but it do not seem to have any effect. Even though I can see ACT_CSTRMP being defined for the processes in VEDA_FE (in the Browse/Edit-tab) and ramping exists in the results (i.e. differences in load level between successive time slices occur), the calculated  total costs remain unchanged (thus there is no difference between a run using ACT_CSTRMP and a run not using).  I have tried to include ramping constrains (ACT_UPS) and that works fine.

Is there something I have misunderstood or does something else have to be defined when implementing ramping costs?

Best regards,
Gustaf, LTU

[Antti-L]

Please report your version of TIMES.
You can see the version at the top of QA_Check.log (most recent versions), or at the top part of the listing file: the second line that reads like TIMES -- VERSION 4.1.2 (right above the Include File Summary).

[GustafY]

My version of TIMES is 4.1.1.

/Gustaf

[Antti-L]

Ok, fine, thanks.
Then your version does support ramping costs. The ramping costs work whenever you have defined either ACT_MINLD (minimum stable load) or a partial load efficiency for *any* process (not necessarily for the one with ramping costs). I hope that info helps.

[GustafY]

When I define ACT_MINLD everything works well. Thank you!

/Gustaf