Adding another ng rows to the gencost matrix will apply a cost to the reactive power, but not to the absolute value of the reactive power. And the User-defined Costs as described in Sections 6.3.1 of the MATPOWER 6 User’s Manual <http://www.pserc.cornell.edu/matpower/docs/MATPOWER-manual-6.0.pdf> doesn’t help you here, though you could apply a quadratic cost, if that would work for you.
However, if it needs to be a linear cost on the absolute value, I think you’re going to have to use the general non-linear cost capabilities in the current development version of MATPOWER on GitHub. They are described in Sections 6.3.3 and 7.2.2 in the new manual <https://www.dropbox.com/home/work/latest-MATPOWER-manual?preview=MATPOWER-manual.pdf>. if you have more questions along the way, don’t hesitate to ask. Ray > On May 7, 2018, at 11:01 AM, Stefanie Aebi <[email protected] > <mailto:[email protected]>> wrote: > > I am trying to set up an OPF problem where the objective function consists of > - active power generation (Pg*cp, where Pg is generation and cp is cost) > - reactive power generation (|Qg|*cq, where Qg is reactive generation and cq > is cost) > > How do I get the absolute values for Qg into the objective function? Is there > a way to hard-code the objective or is there a workaround that will end up > charging the absolute values? > > Thanks for any hints. > Best regards, Steffi > >
