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I must take small exception to what Michael says in the portion below and I
will insert comments accordingly.
On Thursday 2003 August 21 08:45, Michael, you wrote:
....
> Contrary to what another respondent stated, the newly added generator
> will not slow down. When connected in this manner it neither supplies
> energy to the grid nor takes energy from the grid.
This is an inherently unstable (or at best, metastable)
condition. The risks
of motorizing a turbine generator are so great that, at least on the electric
plants I operated, the oncoming generator is brought on line while spinning
very slightly faster than the system's phase rotation.
This is to ensure
positive loading of the generator. Usually, I observed only a few percent of
the load being picked up immediately upon closure of the generator's breaker,
but that was sufficient.
> .... After the connection has
> been made we can slowly raise the excitation current to raise the
> voltage of the new on-line generator. This is when the new generator
> begins to supply power to the grid. This is done slowly so that the
> governor-throttle can maintain the frequency and phase lock.
[James]
I cannot imagine this working well. Again, on submarines, we
controlled
relative loading of generators by moving their no-load speed settings up or
down,
regards,
Jim
James R. Frysinger