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Help with Nodal Admittance/Impedance Matrix using mathcad

thread552-490575

Help with Nodal Admittance/Impedance Matrix using mathcad

Help with Nodal Admittance/Impedance Matrix using mathcad

(OP)
Hello Everyone!

I have a sample SC calculation I'm looking at but can't seem to match the 3x3 impedance matrix found in the sample.

I have formed the Y matrix following the guidelines from Annex B in IEC 60909.

Attached are the system impedance details (pgs 1 to 2 of attachment), the sample Z matrix results (highlighted in yellow on pg 3 of the attachment), and my Y matrix diagram set up (pg 4 of attachment using mathcad).

If someone can help me find my error it would be much appreciated, thanks!

Im sure im making a simple mistake in one of the Y matrix components

https://files.engineering.com/getfile.aspx?folder=...
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