Have you tried simply using a different solver? It could also be a problem with
the starting point, so you might try setting the opf.init_from_mpc option to 1
and possibly even solve the power flow problem first and use it’s solution as
the starting point. E.g.
mpopt = mpoption('opf.init_from_mpc', 1);
pf = runpf(mpc);
r = runopf(mpc, mpopt);
— Ray
> On Nov 21, 2017, at 4:47 AM, Gamze Dogan wrote:
>
>
> Dear all,
>
> I wanted to compare the results of the OPF with the two types of model for
> the generator costs (polynomial and piecewise linear cost).
>
> So first, I launched an OPF with polynomial cost which converged, then I
> launched one with linear cost and it does not converge.
>
> I know that my formulation of the linear cost is correct as it has already
> converged for several cases, but for some it does not.
>
> As the first OPF has converged, it means that there is an electrical solution
> to my problem, but with linear cost it seem that the OPF cannot verify the
> constraints on the cost function (minimal f(x)).
>
> I suppose that there is a way to make it converge, do you have any idea how?
>
> Thank you for your time,
>
> Gamze
>
>
>
