[BC] Understanding power generation

[PeterH5322]

>The genset's excitation controls the net interchange of reactive power 
>(AKA, imaginary power as it is on the +/- j axis), not the net 
>interchange of real power.
>
>Is this not called power factor?

It certainly is related to P.F.

A P.F. of 1.0 reprensent a purely resistive load or source.

A P.F. less than 1.0 represents a partially reactive source.

The P.F. can be leading (capacitive) or lagging (inductive).

By changing the genset's excitation, the genset can appear to be leading 
(producing VARs), lagging (absorbing VARs) or neither.