Dear Dr V. Ravikumar Pandi,
First of all thank you for the help.
The branch from node 1 to 2 is a transformer. I've entered the ratio 10kV / 0,4
kV = 24 and the phase angle of 150 degrees into the first branch.
At this point I can find no error.
What struck me when comparing with the case file
André:
The ratio that is to be entered is a tap ratio for transformers that
have variable tap ratio capability, not a turns ratio; Tap ratios are
usually close to unity, say within [0.95, 1.05] . Turn ratios are done
away with in per unit modeling. And phase shifting transformers (a
