Why generators do not generate electricity
1. Fault phenomenon
When the generator set speed reaches the rated speed, the AC exciter stator excitation circuit switch is closed and the voltage regulator is adjusted to the maximum value when the generator speed reaches the rated speed.
2. failure cause
The generator core remanence disappears or is too weak, the newly installed unit is disturbed by long-distance transportation or the generator is placed for too long, the generator core remanence disappears or the remanence inductance is weak, which results in the generator remanence voltage vanishing or less than the normal remanence voltage value. That is, the remanence voltage is less than 10 V, and the remanent phase voltage is less than 6 V. Because of the stator, rotor and AC exciter stator of synchronous generator, the core of rotor is usually made of 1mm-thick silicon steel sheet, which is subjected to vibration after excitation, and the remanence magnetic field is easy to disappear or weaken.
