What about using the contab table as you mentioned, but assigning a probability 
of 1 to the base case and 0 to the contingency cases? The constraints will 
still need to be satisfied for the contingency cases, but the objective 
function will only be based on the base case. You will need to make sure that 
you only include contingencies that are feasible however, so beware of isolated 
buses and islanding.

   Ray


> On Dec 5, 2016, at 6:38 AM, Gal D <[email protected]> wrote:
> 
> Hi,
> 
> I wish to run an N-1 unit commitment, considering all branch outages. How do 
> I do that?
> 
> - Notice I saw a question regarding N-1 contingency analysis by Harron Malik 
> from July, however I’m asking a different question - I do not want to iterate 
> on contingencies and solve per each one on its own, rather to add all N-1 
> constraints into a single optimization program.
> 
> - I thought of doing that using the ‘contab’ table by assigning uniform 
> probabilities on all branch failures , but I’m afraid this results in a 
> different optimization program.
> 
> 
> Thanks,
> Gal

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