[time-nuts] A Research Proposal

[Hal Murray]

bill.iaxs at pobox.com said:
> Since the direction of power flow depends on the phase angle between the
> synchronous source and load, it seems to me that the difference between the
> average phase angle in one region and that in another (at the ends of a DC
> transmission line) will tell you which way power is flowing.

Nope.  The phase angle difference tells you a lot on an AC line, but nothing 
on a DC line.  For DC, the frequencies can even be different.  That means the 
phase angle is changing, and it can wrap around while the phase angle on an AC 
system is always small.

A classic 3 phase synchronous motor is also a generator if you are pushing it 
rather than it is pushing you.  The sign of the phase angle flips between 
motor and generator.  In this context, the phase angle is the angle the 
magnetic lines make between the rotor and stator.


-- 
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