The following phenomena will occur when the generator oscillation is out of step:
(1) When the stator current exceeds the normal value, the ammeter pointer will be violently bumped.
(2) The pointer of the stator voltmeter will swing quickly.
(3) The active power meter pointer swings on the entire dial of the dial.
(4) The rotor ammeter pointer oscillates rapidly around the normal value.
(5) The generator emits a chirping sound, and the change of the calling sound corresponds to the swinging frequency of the meter hand.
(6) The instruments of other generators running in parallel also have corresponding swings.
When the generator oscillation is out of synchronization, the duty officer should pay attention to 1 to increase the excitation current to generate the conditions for restoring synchronization; 2 to properly adjust the load of the machine to help restore synchronization; 3 when the entire power plant is out of sync with the system, All generators in the power plant will oscillate. In addition to trying to increase the excitation current of each generator, in order to prevent the generator from being damaged by continuous current if the synchronization cannot be restored, it should be specified according to the regulations. After 2 minutes. Disconnect the power plant from the system.
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