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How does the ACCC work?

asked 2020-12-07 05:43:17 -0500

sanpen gravatar image


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?


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answered 2020-12-07 08:03:58 -0500

jconto gravatar image

download this pdf doc:

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Thanks, I was thinking about that document when I wrote the question. I have gone through it thoroughly in the last months trying to understand the linear approximations. However PSSe asks for a newton-raphson like algorithm for the ACCC. Hence the question.

sanpen gravatar imagesanpen ( 2020-12-07 09:01:58 -0500 )edit

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Asked: 2020-12-07 05:43:17 -0500

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Last updated: Dec 07 '20