Twodollar -
Once you get a generator paralleled, you damn near can't get it out of sync - the only way is to slip poles. For most all of the installations I have worked, the only way to do that is drive into a highly leading pf load - excitation is reduced to where the magnetic coupling between the rotor and stator is not enough to couple the power transfer. If the relaying is not clear screwed up, the Loss of Excitation relay takes the generator off-line before it slips.
carl
My understanding pretty much follows Don's post. Unless you are using an induction alternator, the generator is exactly on frequency - and if producing power to the grid, the rotor is leading the grid.don_resqcapt19 said:
Once you get a generator paralleled, you damn near can't get it out of sync - the only way is to slip poles. For most all of the installations I have worked, the only way to do that is drive into a highly leading pf load - excitation is reduced to where the magnetic coupling between the rotor and stator is not enough to couple the power transfer. If the relaying is not clear screwed up, the Loss of Excitation relay takes the generator off-line before it slips.
carl