Re: power-grid physics

[Bernard Cleyet <anngeorg@PACBELL.NET>]

People!

I've just been bombarded w/ ~ 15 "spams" w/ attachments.   No problem,
except it may have caused me to miss at least one post on the above
thread.  Richard T's post, to which Brian replied, hasn't arrived.

Anyone with similar experience or comments?



bc


p.s. some of the mail, which I hadn't sent, was from servers claiming my
mail to them either had unremovable viruses or the addressees doesn't
exist,    and what is a .pif file?

Brian Whatcott wrote:

> At 02:37 PM 8/20/2003 -0500, you wrote:
>
>
> > Maybe we need a tutorial for those of us somewhat AC-impaired.  Let me
> > propose this simplified scenario and see if anyone on the list knows how
> > this works in reality.
> >
> > Power is off.  Two generating plants, each with a max output of 1000
> > Watts--generators at 100 Volts.  One transmission line at 1000 volts.  A
> > load (still switched on) of 1600 Watts--say two factories each wanting 800
> > Watts at 100 volts.
> >
> > OK--how do you turn the power back on?  How does the phase get synchronized?
> > What, if any, role do the transformers play in this scenario?
> >
> > ??Rick
> >
> > *********************************************************
> > Richard W. Tarara
> > Professor of Physics
> > Saint Mary's College
> > Notre Dame, Indiana
> > rtarara@saintmarys.edu
>
>
> Treating this as a hypothetical puzzle - which I suppose it really is
> if I mention there is no relation to reality:
> I spin up generator 1 to 60 Hz,  at 70 volts, at which point the
> load is drawing 70^2 / 100/16 watts.  That's  784 watts.
> Then as soon as possible, I spin up the second, and when it
> self-synchronizes, it then lifts network volts slowly so as not
>  to exceed 1000 watts at either source.
>
>
>
> Brian Whatcott    Altus OK    Eureka!