The following vector (phasor) diagram for one of the phases shows the
way the generator is currently operating. Its field current is creating an
emf (EGEN) of 130 V at a power angle δ = 6.9◦. The current IL delivered
to the grid has a phase angle of 30◦ lagging with respect to the grid.
The inductive reactance of the generator armature (stator) windings is
XL = 0.5 , which means the voltage drop across that inductance is
VL = IL XL = 0.5 IL. And, of course, current through the inductance
lags the voltage across the inductance by 90◦ (ELI the ICE man).