Hello, I'm currently trying to get familiar with matpower. I have following
problem with the 'transformer off nominal ratio'. I need to model a
transformer. The values given are following one: U1:
20 kV
U2: 0.4 kV
rated power: 400 kVA
no load losses: 0.61no load current (%): 0.1525u_k:
3.85
Cu losses: 4.6 kWswitching group: Dy5 I have
following questions: 1) how do I calculate the TAP? When I look into the
casefiles, I can see that the value fpr the tap is most time between 0.8 and
1.5
I would have calculated by dividing 20kV/0.4KV=25 which does not seem to
be the correct value for the tap. 2) How do I identify the BR_X and BR_B ?
When I look into the equivalent circuit diagram I know that there are more
components that need to be calculated. So what
do these parameters mean for the transformer? I would be grateful for any
help. Kind regards, Cansu Yildirim
