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What is the state of the generator after loss of magnetism
The loss of magnetism will be divided into two aspects:
(1) adverse effects on the generator itself:
A. generator out of step, in the rotor damping system, the rotor core surface, the rotor windings in the differential frequency current, causing additional temperature rise, which may endanger the safety of the rotor.
B. generator out of step, the stator winding will appear in the pulse current, or beat the current, which will produce alternating mechanical torque, which may affect the safety of the generator.
(2) adverse effects on power systems:
When the A. generator does not lose magnetism, it is necessary to output reactive power to the system. After the loss of excitation, the system will absorb reactive power. This reactive difference will cause the voltage drop of the power system near the generator.
B. due to the existence of the reactive power balance, if you want to compensate, will cause other generators over current. Compared with the capacity of the system, the larger the capacity of the motor, the more serious the over current.
C. due to the above current, it is possible to cause other generators or other components in the system were removed, resulting in the collapse of the system, resulting in a large area blackout.