I have forgot that I have a warning with BPMPD_MEX, when the line cost is
cero, i.e., for a system with three nodes, the cost matrix is:
Line 1: (-20 0 -40 0 -60 0 0 0 20 0 40 0 60 0)
Line 1: (-20 60 -40 120 -60 200 0 0 20 50 40 100 60 150)
Line 1: (-20 0 -40 0 -60 0 0 0 20 0 40 0 60 0)
WARNING: This version of BPMPD_MEX has a bug which caused it to return
an incorrect (infeasible) solution for this particular problem.
equality constraint violated by 1
But the responses are correct. Could I have other problems?
Thank you very much for your attention
---------------------------- Mensaje original ----------------------------
Asunto: RE: Question
De: [email protected]
Fecha: Mie, 1 de Junio de 2011, 4:35 pm
Para: [email protected]
--------------------------------------------------------------------------
Thank Professor Zimmerman for your idea.
I have resolved this problem with another idea. I created a two variables:
Flow in the line (F) and a auxiliary for piecewise linear cost (z). The F
variable has limits negatives, i.e., -Fmin<=F<=+Fmax and besides F can
have any direction. On the other hand the z variable can have only cost
positive for any flow direction, i.e. line costs are ordered as follows:
(-20 60 -40 120 -60 200 0 0 20 50 40 100 60 150)
Bloqs From 1 To 2 (Capacity=45MW)
20 MW 50 $
40 MW 100 $
60 MW 150 $
Bloqs From 1 To 2 (Capacity=45MW)
-20 MW 60 $
-40 MW 120 $
-60 MW 200 $
What is your opinion about my idea?. So far the idea works very well, but
I am not sure about the convergence the problem, when there are a lot of
cost.
Best Regards,
Santiago Chamba
