The branch model used by MATPOWER is the one shown in Fig 3-1 in the manual. Tap changes on the primary or secondary side are both reflected in the single tap ratio specified in the TAP column of the branch matrix. This tap ratio is taken into account when forming the admittance matrix. As you can see in Fig 3-1, the voltage at the secondary side of the ideal transformer in the model is v_f / N. It is also straightforward to run a few cases with different settings for the tap ratio to see the effect on voltages.
-- Ray Zimmerman Senior Research Associate B30 Warren Hall, Cornell University, Ithaca, NY 14853 USA phone: (607) 255-9645 On Sep 8, 2014, at 12:52 PM, <[email protected]> <[email protected]> wrote: > Thanks Ray, > modifying TAP settings in mpc.branch is changing taps on primary side, right? > I want to modify taps on secondary side which makes a difference on > admittance matrix. Also I can't see how voltage magnitude is controlled by > tap setting. > Cheers, Sabrina > > >
