Hi Roman, In the current version of MATPOWER there is no easy way to do this for AC OPF problems, since the flows are non-linear functions of the optimization variables. It is possible to add user-defined costs on the DC model flows using the mechanism described in sections 5.3.1 and 6.1 of the User's Manual, since they are linear functions of optimization variables.
-- Ray Zimmerman Senior Research Associate 419A Warren Hall, Cornell University, Ithaca, NY 14853 phone: (607) 255-9645 On Apr 9, 2013, at 11:26 AM, Roman Korab <[email protected]> wrote: > Hello Matpower users! > > I wonder if is possible to treat the thermal branch limits as a "soft" > constraints in Matpower OPF procedures? For example, when I make some OPF > calculations in order to determine effectivness of cross-border real power > flow control by using phase shifting transformers, for some settings of PST, > OPF don't converge. The main reason is that some branches have not enough > capacity to transmit more power. Is there any simple way to overcome > mentioned problem, for example, by automatic treatment the thermal limits of > such branches not as a strict constraints, but as constraints that can be > exceeded? > > Best regards > Roman
