>
> Denny Esterline wrote:
> > Much good has been said, but all seem to have missed an important
> > aspect of the control equation - the generators have field coils.
>
> No, it wasn't missed since it wasn't relevant to the discussion.  The
> output
> voltage is a function of the excitation field strength, but has no bearin=
g
> on the speed of a unloaded generator.
>
> Respectfully disagree.
There's two parts (at least) to this conversation - How they _initially_
synchronize an individual generator to the grid, and how they _maintain_ a
generator matched to the grid.

Initially, yes, an unloaded generators' frequency can only be controlled by
the prime mover, but once it's connected to the grid and there's
load available it becomes a bit more complex.

-Denny
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