This model implements a transformer with a tap changer which takes a phase-to-phase voltage magnitude target and a dead band, and tries to maintain the magnitude of phase-to-phase voltage at portB in the acceptable dead-band next to the target value.
It extends the class TransformerWithTapChangerInterval, which implements a transformer with tap-changer and Interval logic, redefining said interval in terms of target value and dead-band.
.PowerGrids.Electrical.Branches.TransformerWithTapChangerTarget