Dear,
I have a (rather large) case that converges when a power flow is carried
out. However, an optimal power flow does not converge.
I checked the solution of the power flow for all limits, and gave this
as a starting point to the optimal power flow.
I was expecting that the optimal power flow would give at least a
feasible solution (as the PF-equations can be solved, and limits are
respected by the starting point).
Even if the algorithm is not allowed to iterate, and thus stays on its
starting point, it does not converge.
I tried several solvers. PDIPM gives as error message "IPM: numerically
fails: unable to solve Ax=b"
Can somebody hints into what direction I have to look for solving this
issue?
What is most likely? Is the problem related to my case or do I miss some
OPF-constraints?
Thanks for helping,
David
