I am not a transformer modeling expert, but I'll do my best to answer your first two questions ...
1) The resistances are modeled in p.u. based on the system baseMVA and the baseKV at the "to" side of the transformer. 2) They are modeled on the "to" side of the transformer, which could be attached to the high or low voltage side. 3) This one I don't know the answer to. -- Ray Zimmerman Senior Research Associate 419A Warren Hall, Cornell University, Ithaca, NY 14853 phone: (607) 255-9645 On Feb 9, 2012, at 10:30 AM, Oliver Lösch wrote: > Hi alltogether, > > I’ve got the following three questions regarding transformator modeling in > Matpower: > > 1) The series equivalence resistances are modeled in the casefiles just > as the lines are but by also adjusting the calculation of the p.u. units of > the resistances corresponding to the transformators ratio – is this correct? > 2) All the resistances etc. are modeled on the low voltage side of the > transformator – correct? > 3) And how can the equivalence resistances coming from the iron losses > and the main inductivity be modeled in the casefiles? > > I do very much appreciate all kinds of helpful answers! > > > Best regards > > Oliver Loesch >
