You want to set the RATE_A column of the branch matrix to zero for all lines. If that gives you the same result, then your original problem must not have had any binding flow limits.
Ray
> On Sep 11, 2018, at 2:59 AM, Emir Ćosić <[email protected]> wrote:
>
> Dear all,
> is it possible to caclculate unconstrained opf in matpower?
> I set all line flows on value zero, but results are same as in original file.
>
> Best regards,
>
> Emir
>
