Modelling of a Storage Process Antti-L Super Moderator Posts: 402 Threads: 18 Joined: May 2010 07-01-2020, 06:55 PM vsaini Wrote:I want to limit the storage capacity to 4 hours, so can I use NCAP_AFC('ACT') with value of 0.1666 at DAYNIGHT Time slice level (storage of 4 hours in a day i.e. 4/24 )? Further, what is ACT in the expression NCAP_AFC('ACT')? Is it the Activity? Because, in the drop down menu of AnswerTIMES it only shows ‘ACTGRP’. Is ‘ACTGRP’ the right one to select and model NCAP_AFC(ACT)?AL> Yes, 4 hours' capacity can be modelled by NCAP_AFC('ACT','DAYNITE') = 0.1666  (if it is a DAYNITE level storage process). Under ANSWER, ACT should be replaced by ACTGRP.  ACT / ACTGRP are GAMS labels.  But yes, they are used when defining NCAP_AFC for the activity (and activity represents the storage level). vsaini Wrote:I also want to model the depth of discharge in my storage process. For instance, if I want to model a depth of Discharge of 80%, which means at any given time my storage process charge will not go below 20% of the capacity then in-order to achieve that can I use the NCAP_AF (LO) (at annual level) with of 0.20?  AL>  If you want to define a lower bound for the storage level in proportion to the capacity, you can indeed define it with NCAP_AF('ANNUAL','LO')=value.  If the full storage capacity (100%) corresponds to NCAP_AFC(ACT)=0.1666, 20% of the capacity would correspond to value=0.2×0.1666. Thus, I suspect that by setting NCAP_AF(ANNUAL,LO)=0.2 you would get an infeasible model, because your lower bound would be higher than the upper bound. « Next Oldest | Next Newest »

 Messages In This Thread Modelling of a Storage Process - by vsaini - 02-01-2020, 05:24 PM RE: Modelling of a Storage Process - by Antti-L - 02-01-2020, 08:56 PM RE: Modelling of a Storage Process - by vsaini - 03-01-2020, 04:06 PM RE: Modelling of a Storage Process - by Antti-L - 03-01-2020, 04:30 PM RE: Modelling of a Storage Process - by vsaini - 06-01-2020, 03:29 PM RE: Modelling of a Storage Process - by Antti-L - 07-01-2020, 12:40 AM RE: Modelling of a Storage Process - by vsaini - 07-01-2020, 06:11 PM RE: Modelling of a Storage Process - by Antti-L - 07-01-2020, 06:55 PM RE: Modelling of a Storage Process - by vsaini - 08-01-2020, 03:29 PM RE: Modelling of a Storage Process - by Antti-L - 08-01-2020, 03:58 PM RE: Modelling of a Storage Process - by vsaini - 13-01-2020, 12:21 PM

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