way to add costs as demand approaches capacity

[cyang]

I'm trying to think through ideas of how to include additional costs as the demand for electricity approaches the generation capacity in a given timeslice.  The idea is to simulate the increases in electricity market prices (above and beyond the normal increase in variable costs associated with peaking power plants) that would result from peak load pricing and also transmission constraints when we get close to generation capacity constraints.  For example, I was thinking of adding an additional cost when generation exceeds 90% of total dispatchable power plant capacity and an even higher cost when generation exceed 95% of total capacity, but I'm not sure how one would set this up.  The reason for doing this is to influence the timeslice profile of electricity usage within the model (for electric vehicles and other potential flexible demands). Any thoughts or suggestions would be would be greatly appreciated. thanks Chris

[AKanudia]

you can try setting up the following UC:

for each R, T, TS-

<generation from plants>  <=  .9 x <capacity of plants> x <PRC_CAPACT> + <activity of DumProc_PLPSurcharge>

ACT_COST of DumProc_PLPSurcharge will have the surcharge you want to impose. Use UC_FLO, UC_CAP and UC_ACT, respectively, for the three terms above.

and if this works, setup another one for the next slice.

HOWEVER, I strongly suspect that I have overlooked something. Otherwise Antti would have  responded to this immediately