Sir, Thank you very much for your support. Now I want to minimize generation cost as well as transmission cost. Obj = sum(fuel cost) + sum( transmission cost )
where transmission cost = (power flow / line limit) * constant The fuel cost minimization is already available. Now I want to add Transmission cost which is depending on Pflow. Is it possible to add transmission cost in MATPOWER. On Thu, Mar 26, 2009 at 10:01 PM, Ray Zimmerman <[email protected]> wrote: > You will need to add some user defined constraints and costs as described > in Section 3.4.1 of the User's Manual. > > If you call the base dispatch (where the line overload exists) P0, then > you'll need to define two new variables for each generator, one Pplus to > represent the upward deviation from P0 and another Pminus to represent the > downward deviations. You can put whatever costs on them you like using the > generalized cost function. You'll also need some extra constraints to define > their values ... > > Pg - Pplus <= P0 > P0 <= Pg + Pminus > > 0 <= Pplus > 0 <= Pminus > > You will have to use one of the OPF solvers that uses the generalized OPF > formulation (MINOPF, TSPOPF or fmincon) to solve this however. You can find > an example of a case with extra linear user constraints & costs in > t/t_opf_minopf.m or t/t_opf_fmincon.m. > > Hope this helps, > > -- > Ray Zimmerman > Senior Research Associate > 428-B Phillips Hall, Cornell University, Ithaca, NY 14853 > phone: (607) 255-9645 > > > > On Mar 26, 2009, at 9:44 AM, RAVIKUMAR V wrote: > > I am using the lpopf.m file to solve the OPF. >> >> 1. case I >> >> for minimizing the cost as objective using lpopf.m . (This is given >> directly so I did it.) >> 2. case II >> >> This is congestion removal by generation resheduling. After adding >> bilateral transaction some of the lines get overloaded, In order to remove >> this overload, I want to reshedule the generation but the change is as >> minimum as possible and given by >> f = C( Del (Pg+ )) - C( Del (Pg-)) >> >> where C is the cost function for increase/ decrease in generation. >> >> Here I have to solve the OPF by same lp method, but objective is to reduce >> the cost for change in generation. >> Can I get detailed help for this implementation? >> >> >> ------------------------------------------------------------- >> WITH REGARDS, >> >> V.RAVIKUMAR PANDI, >> Research Scholar, >> ------------------------------------------------------------- >> HAVE A NICE DAY >> ------------------------------------------------------------- >> >> > > -------------------------------------------------------------- WITH REGARDS, V.RAVIKUMAR PANDI, Research Scholar, ------------------------------------------------------------- HAVE A NICE DAY -------------------------------------------------------------
