Dear All, I want to model load curtailment based on AC-OPF by using dispatchable load. And the objective is to minimize the total amount of active load(deltaPd) curtailed.
Do I need to modify the objective using the add_costs methods? Or only set the cost coefficients of original generators to be zero? Another question is: can the negative generator (dispatchable load) use polynomial cost? Thanks! ---------------- Jingran Wang PhD candidate Key laboratory of Smart Grid, Ministry of Education Tianjin University Tianjin,300072 China Work: +86-022-27404221 E-mail: [email protected], [email protected] >From: Ray Zimmerman <[email protected]> >Reply-To: "MATPOWER discussion forum" <[email protected]> >To: MATPOWER discussion forum <[email protected]> >Subject: Re: load shedding >Date:Mon, 1 Nov 2010 13:52:56 -0400 > >Yes. Either method works for AC OPF. > >-- >Ray Zimmerman >Senior Research Associate >211 Warren Hall, Cornell University, Ithaca, NY 14853 >phone: (607) 255-9645 > > > >On Oct 31, 2010, at 2:40 AM, jrwang wrote: > >> >> Are the same techniques suited for load shedding in AC-OPF considering >> voltage constraints? >> >> Thanks! >> >>> From: Ray Zimmerman >>> Reply-To: "MATPOWER discussion forum" >>> To: MATPOWER discussion forum >>> Subject: Re: load shedding >>> Date:Fri, 29 Oct 2010 12:01:46 -0400 >>> >>> Both techniques work. You can do as you suggest and simply add a high cost >>> generator next to the load . Or you can do as Carlos suggests and replace >>> the load with a dispatchable load at a high price. See section 5.4.2 in the >>> manual for more details. >>> >>> One advantage to the latter is that as the load sheds it maintains a >>> constant power factor. >>> >>> -- >>> Ray Zimmerman >>> Senior Research Associate >>> 211 Warren Hall, Cornell University, Ithaca, NY 14853 >>> phone: (607) 255-9645 >>> >>> >>> >>> On Oct 29, 2010, at 12:21 AM, Mehdi wrote: >>> >>>> Hi there, >>>> >>>> Can anybody help me with how can I consider load shedding in MATPOWER's >>>> dc-opf ? >>>> >>>> Can I model load shedding as active power only generator (Pg=0, Pgmax=Load >>>> at that bus, Qg,Qgmax=0) at load buses? Then by running the dc-opf the >>>> output of these generator can be considered as load shedding!!! >>>> >>>> Regards, >>>> Daniel >>> >>> >> >> > > >
