Your description with my ending of "earthing the neutral point via a single-phase distribution transformer with the LV side loaded by a burden resistor sized" to allow a voltage relay to operate down to 5% of the winding is how the generator neutral is grounded and how the generator manufacturer...
We have a (installed 35 years ago) 13.8 kV 25 MVA generator (peaker) resistively grounded through a grounding transformer and resistor with a voltage relay to detect ground faults down to 5% of the generator winding which is typical of utility grid connected generator units. The generator feeds...