MVA Technique for Single Phase Fault

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nmurdock

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I'm looking to get some clarification on applying the MVA technique for single phase faults. I've seen in a number of threads that the MVA technique is exclusively used for three phase faults; however, I've found an article that explains that single phase faults can be found as well with a few adjustments to your approach, see the snippet below.
1715784923963.png

To find a single phase fault, per this article, you need to complete a few additional steps; one, you must find the MVA contributions of the negative and zero sequences in the circuit, and add them in the same manner that you would other MVA sources, IE in series with each other.

1715785414825.png

Then, we simply multiply by our 3 phases to get the total MVA contributions, and the rest of the equation follows, divide by voltage to get I-sc. Does that track to reality or did I just find a shoddy article?
 

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