In the documentation for the case file format it does say that ratio =
Vf / Vt, which is misleading. This is only true if the series
impedance of the branch is zero and it was intended only to clarify
the orientation of the taps. I..e. if you want to increase Vt relative
to Vf, you have to *decrease* the ratio rather than increase it.
Sorry for the confusion,
Ray
On Oct 15, 2008, at 7:31 AM, jigna pandya wrote:
hello sir,
In case.m file
ratio is considered as ratio of vf(from bus voltage) to vt(to bus
voltage)if a transformer is connnected between the two buses.
in case57.m file , between bus 39 ( vf=0.983KV) and bus 57
(vt=0.965KV) a transformer is connected.
the obtained ratio is vf/vt=1.0186.
but in the file it is written as 0.981 which does not match with the
obtained ratio.
so which ratio is correct?
thanks in advance
regards
