Generator Pole Slipping?
Generator Pole Slipping?
(OP)
Hi
Could someone please explain the phenomenon of pole slipping in synchronous generators? What exactly is it and what causes it?
Thank you in advance.
Could someone please explain the phenomenon of pole slipping in synchronous generators? What exactly is it and what causes it?
Thank you in advance.





RE: Generator Pole Slipping?
This small slip is controlled and so noted as power factor.
If the excitation goes to the extreme and the pole and system slip out of phase, you had a serious problem.
RE: Generator Pole Slipping?
The 'slip' occurs when the rotor experiences a sudden physical and electrical shift in position relative to the stator, after which the field recovers enough strength to lock the rotor back in synch with the stator. When his occurs, the violent acceleration and deceleration associated with pole slip causes enormous stress on the generator and prime mover, and may result in anything from winding movement to shaft fracture or worse. It is a very serious fault.
A correctly set AVR will act to prevent operation at or outside of the stability limit, but certain abrupt changes in the system caused by faults or badly-planned switching operations may exceed the ability of the AVR to respond if the machine is already near the stability limit.
----------------------------------
If we learn from our mistakes,
I'm getting a great education!