Dear Dr Zimmerman, After the OPF is solved, how can I see the Ybus matrix for the system ?
Secondly, I have 20 lines. All lines have similar resistance. Instead of manually adding the resistance in the matrix, is there another way of doing it ? Ie do I enter this code in the runopf () as parameter? Thank you On Wednesday, November 27, 2013 5:58 PM, Shri <[email protected]> wrote: You can unsubscribe from the list at any time by sending an e-mail to [email protected] with the following line in the body of the message. leave On Nov 27, 2013, at 11:42 AM, Hamed Pourgharibshahi wrote: Dear Dr.Ziverman >Please don't send me these emails. >Best regerds >Hamed Shahi > > > > >On Wed, Nov 27, 2013 at 8:36 PM, Ray Zimmerman <[email protected]> wrote: > >I suppose it depends … do you want to minimize costs in the other areas as >well, subject to fixed exchange schedules? If so, yes, I think working with >toggle_iflims.m is best. If, on the other hand, you are only interested in >minimizing cost in one area, with the dispatches fixed in other areas, then I >think fixing those dispatches (PG=PMIN=PMAX) is sufficient to fix all of the >interface flows as well and you don’t even need additional interface flow >constraints. >> >> >>-- >>Ray Zimmerman >>Senior Research Associate >>B30 Warren Hall, Cornell University, Ithaca, NY 14853 >>phone: (607) 255-9645 >> >> >> >> >>On Nov 26, 2013, at 8:10 PM, Henry Lin <[email protected]> wrote: >> >>Dear Dr. Zimmerman, >>> >>> >>>Thanks a lot for your help. >>> >>> >>>I want to minimize the cost of generation of one area subject to a fixed >>>value for the exchange between all the other areas. Shall I still work with >>>toggle_iflims.m as you suggested or you have some other suggestions? >>> >>> >>> >>> >>>Thanks a lot. >>> >>> >>>Best, >>> >>> >>>Henry >>> >>> >>> >>> >>> >>> >>> >>>2013/11/26 Ray Zimmerman <[email protected]> >>> >>>Sorry, somehow my previous reply never got sent … >>>> >>>> >>>>So, what exactly do you want to optimize, if you are specifying the import >>>>and export? Are you saying you want to minimize cost of generation in both >>>>areas subject to a fixed value for the total exchange between the two >>>>areas? If so, the best you can do is constrain the net flow (DC >>>>approximation) to equal your specified value. The easiest thing is probably >>>>to start with the code in toggle_iflims.m and modify it to use an equality >>>>constraint instead of an inequality constraint on the interface flow. >>>> >>>>-- >>>>Ray Zimmerman >>>>Senior Research Associate >>>>B30 Warren Hall, Cornell University, Ithaca, NY 14853 >>>>phone: (607) 255-9645 >>>> >>>> >>>> >>>> >>>> >>>>On Nov 26, 2013, at 10:43 AM, 车 <[email protected]> wrote: >>>> >>>>Hi Matpower users, >>>>> >>>>>Anybody have any ideas about how to calculate opf with the total import >>>>>power and export power specified? >>>>> >>>>> >>>>>Thanks a lot >>>>> >>>>>Lin >>>>> >>>>>On Nov 25, 2013, at 8:59, Henry Lin <[email protected]> wrote: >>>>> >>>>> >>>>>Dear all, >>>>>> >>>>>>I am trying to use OPF with area interchange being specified. I know how >>>>>>much power is going to be import and export. >>>>>> >>>>>>How can I do it using Matpower? >>>>>> >>>>>> >>>>>>Thanks, >>>>>>Henry >>>>>> >>>>> >>>>> >>>>> >>>>> >>>> >>> >> >
