On Nov 23, 2012, at 4:48 AM, Evangelos Galinas <[email protected]> wrote:
> Assuming that I use a standard cost for curtailment, let's say c=0.18 ct/kwh, > at which elements of the H matrix should I have this c denoted. The same as > the power part of the N? and how I can denote that these cost must come from > a subtract from max P of the Pg? > > Pmax is a constant, so adding a function of Pmax to the objective will not > change the solution. The cost of curtailment simply shows up as a negative > cost on Pg. > > > the way I have developed my scripts, the Pmax of the wind turbines is not the > rated power of the machine but the max infeed for every snapshot. So indeed > every hour of the year would be different. I'm calculating the curtailment > cost out out of the opf and adding it to the obj. function manually but I > believe the results would be different if that cost was in the matpower's > objective function. Don't you think? Yes, I think so. By curtailment cost, I assume you mean the cost of "spilling" wind, that is of dispatching it below Pmax (which I understand varies based on conditions). If that is the case, it should simply be a negative cost of generation (or a negative offset to the nominal cost). I'm not sure if that addresses your question … -- Ray Zimmerman Senior Research Associate 419A Warren Hall, Cornell University, Ithaca, NY 14853 phone: (607) 255-9645
