Basic faults of the generator

Therefore, a basic motor generator '>

The common fault occurs during normal operation of the motor generator is' > are the following:

(1) interphase short-circuit of stator winding.

'> generator stator winding motor short if not promptly removed, will burn down the motor' > generator, cause extremely serious consequences, therefore, must have two sets of fault or fast protection reaction to such more than two sets.

(2) stator winding turn to turn short circuit.

'> generator stator winding interturn short circuit of the motor, will have a big current in the short circuit ring, both at home and abroad have such as inter turn short-circuit burns, and even burning motor generators' > report. Thus, stator winding occurs

Interturn short circuit should fast motor generator with '>.

With the motor '> generator design technology matures, more and more with the same phase winding groove less possibility of interturn short circuit can be greatly reduced.

(3) stator single-phase grounding.

Stator single-phase grounding is not a short-circuit fault, but due to the following reasons, the single-phase ground fault requires sensitive and reliable response:

A lot of neutral 600MW units at all by the high resistance grounding.

The capacitor current will burn core fault point.

The most short-circuit is first due to single-phase grounding no timely treatment, and develop into the.

The grounding phase voltage non grounding, insulation effect.

(4) loss of excitation.

Due to the excitation of equipment failure, excitation and other reasons, caused by the loss of magnetic (total loss or partial loss of excitation magnetic), the motor generator in '> asynchronous operation, has great influence on safe operation of the system and the motor generator' >,

Large unit requires timely and accurate monitoring of magnetic loss fault.

(5) rotor one point and two point ground fault.

Rotor one point grounding of turbo generator motor '> the impact is not great. Generally allowed to continue running for some time. (Note: turbine generator unit vibration motor '>, after the grounding will cause the unit so,

Require the removal of motor '> generating units, to ensure the safe operation of the unit.