Original poster: Jim Lux <jimlux@xxxxxxxxxxxxx> At 05:56 PM 1/9/2007, Tesla list wrote:
Original poster: <davep@xxxxxxxx>
> Actually, with a suitable zigzag transformer, apparently
> synchronization is no worse than just paralleling them.
>
> Frequency/phase takes care of itself (the generator that wants to run a
> bit fast takes more load, slowing it down).
Which means it takes more of the load, so there is less than 3X
power available.
Also the underspeed.voltage units will tend to _absorb_
power, robbing the external load.
Well, that's why it's less optimum than a real 3 phase generator. But, finding a brand new 3 phase generator for $750 might be a bit of a challenge.
> There IS an issue when throwing the switch to connect them.
> Amplitude is a matter of regulators and throttles.
An current sruging baack and forth as the throttles
run the units up and down. And the fact the voltage
regulation is less important than frequency regulation
when paralleling AC sources. And the fact that 'identical'
regulators AND governors on three 'identical' units
won't be. cf any text book on power system stability.
I didn't say it would be easy <grin>...
best
dwp