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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!