Robust Solver Convergence Behavior
Hello everyone,
While testing the robust solver for contingency analysis, I observed two behaviors which I cannot explain.
1. Non-Convergence with max Mismatch < 5 MVA
In some instances, the robust solver prints that it is unsuccessful even though the final mismatch is below 5 MVA. My tolerance is set to 1 MVA, but one of the measures that the robust solver usually takes is to increase the tolerance to 5 MVA and hence these models should converge.
2. Convergence with max Mismatch > 5 MVA
Oppositely, in some instances, the robust solver prints that it is successful even though the final mismatch is above 5.
Edit: Case 2 is explained by the creation of small islands and can be solved by turning them off.
Does someone have an explanation for this?
Thank you in advance!
