What is the relation of Y bus matrix and 3 winding transformer number?

3452 ●1 ●9 ●20

The star bus in the 3W transformer model has a unique bus number (> 1 million) and it appears at three lines in the output file, one for each winding bus of the transformer.

It is thereby possible to identify the transformer, unless there are several parallel transformers to the same three buses.

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Thanks for the help! I figured out that the star-buses will have the name 1100001 and are numbered the same as the order of the psspy.atr3int function with the parameters ENTRY=2, FLAG=2. For example 1100001 is the first three-winding transformer, the 1100002 is the second (sorted by name).

jbarberia (Dec 4 '3)

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What is the relation of Y bus matrix and 3 winding transformer number?

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