Could you send me an example off-list with the details I need to reproduce this behavior so I can investigate it? It is theoretically possible that there are multiple local solutions and (for some solvers) the flow constraint value may influence the path the iterates take toward the solution, leading to different local optima.
-- Ray Zimmerman Senior Research Associate 419A Warren Hall, Cornell University, Ithaca, NY 14853 phone: (607) 255-9645 On Jul 24, 2012, at 6:15 AM, Guillem Viñals Canal wrote: > Dear all > > I was working on a problem with generators of 12kW, loads of 5kW and voltages > of 400V and I noticed that the brach constraint Rate_A affected the result of > the optimal power flow. Even when it was far larger than the power flow and > didn't act as a constraint, different values of Rate_A lead to different > results. Why is that?
