Harun Hökelek wrote:
Dear all,
I’m trying to obtain bus impedance matrix of IEEE 33-Bus test system by
inversing admittance matrix.
However inv(makeYbus(case-data)) gives badly scaled or singular warning.
Is there any way to get the bus impedance matrix of this system?
Sincerely,
Harun
Dear Harun, it is very likely that your network does not have any return
path to ground. This can happen if all your branches are just serial
elements, and there are no shunt elements. In that case, we can say
from first principles that the impedance matrix does not exist; think
about it for a moment: what happens when you connect a current source to
the terminals of a network that does not offer a return path?
Carlos.
