When the OPF does not converge, the result is often meaningless. Finding the reason for unfeasibility can be a non-trivial task. Start by checking that total fixed load lies between the sum of PMIN and the sum of PMAX for the on-line generators. Try removing all of the line flow limits. Try a simple power flow with what you think are reasonable voltage and real power set points for the generators.
Once you find a feasible OPF solution you may be able to modify parameters gradually toward the infeasible case to determine which constraints bind and then conflict. Hope this helps, -- Ray Zimmerman Senior Research Associate 419A Warren Hall, Cornell University, Ithaca, NY 14853 phone: (607) 255-9645 On Apr 22, 2013, at 2:19 PM, angelina sirri <[email protected]> wrote: > Dear Dr Zimmerman, > I am doing reliability study in case24_ieee_rts and I have put extra > expensive generators in load buses, in order to calculate the load > curtailment.I did acopf but for some hours opf did not converged and I saw > that the Qmin and max limits were violated.I couldn't find why, So I tried to > do dcopf and now, it does not converges again and I see that the extra > generators that I have put, some hours generate negative power of small value > (like -0,0025).Have you got any idea why is this happening or what should I > check?? > > Regards, > Angelina
