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Hi,

I am trying to understand what does the ACCC calculation do, compared to the "brute force" approach.

When I think of the contingency analysis functionality in general terms, I think of a program that does this:

• For each branch selected for contingency:

  • Fail the branch

  • Run power flow and record the results

  • Recover the branch

  • Continue

That explains the use of the .mon, .sub and .con files. However the dfax file is something related to the linear analysis (PTDF + LODF). If the ACCC needs the linear distribution factors, it is not doing the "brute force" approach, but rather a simplified or hybrid version.

So, how does it work? is there any publication or documentation that explains this in detail?

Thanks.