Motoring effect 1

[golftennis]

Hi,
when two alternators running in parallel due to governer fault the frequency goes down of one of the alternator and the alternator goes into reverse power assuming the reverse power relay does not trip what actually happens to the direction of the motored alternator and other parameters.
Thanks

 

[GTstartup]

Direction? If you mean rotation, then nothing, it continues to rotate as before but just as a motor. What else happens depends on other factors such as prime mover type, whether excitation is maintained etc.

 

[waross]

If you look at the ends of both motor shafts with a strobe light, you would see one shaft drop back a few angular degrees when it lost prime mover power. That is all that happens to the mechanical rotation. The current reverses and supplies enough power to drive the prime mover at synchronous speed.
The operating generator picks up the load that was supplied by the other generator plus enough load to motor the other prime mover. Motoring can be so subtle that if the reverse power relay fails and the operators are not watching the watt-meter, they may not be aware that the machine is motoring.


Bill
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"Why not the best?"
Jimmy Carter