The power flow in branch 3 is not an optimization variable, so you need to
express your cost as a function of the optimization variables. For an AC power
flow model, this is non-linear, so that’s problematic. For a DC power flow
model, however, the flow is a linear function of the angles so you can apply a
user-defined cost to it. I suggest you take a look at toggle_softlims.m for an
example of code that puts a cost on the flow that exceeds a threshold. What you
want to do is nearly identical (for the DC case), except that your threshold
would be zero and you are only doing it for a specific line.
Ray
> On Mar 20, 2015, at 8:59 AM, 李岩松 <[email protected]> wrote:
>
> Dear All:
>
> I have studied the ‘6.3 Extended OPF Formulation’ and '7 Extending the
> OPF’ in ‘manual.pdf’ to include additional cost in the function but failed to
> figure it out.
>
> The default objective function is the total cost of all the generators per
> hour.
>
>
> Now I want to add ‘Pbranch3*ξ’, in which Pbranch3 is the active power
> transferred on branch 3 and ξ is the electricity price which is a constant.
>
> <截图1.png>
>
>
> With greatest pleasure to get any response.
> Yours sincerely
> Yansong Li
> 2015/03/20
>
>
