1. In the event of an accident, the generator and exciter are allowed to operate overload for a short period of time. Current and time regulations allowed for accidental overload are used when the generator is operating overloaded due to an accident. , the wind input and output of the generator should be closely monitored, and the wind input and output of the generator should be closely monitored. The rotor coil temperature, stator coil and rotor outlet water temperature and brush operating conditions should not exceed the maximum. value. When the generator stator current exceeds the allowable value, the electrical service personnel should first check the power factor and voltage of the generator, and pay attention to the calculation of the multiple and duration of the current exceeding the rated value, reduce the rotor current and reduce the rotor currenttator to the maximum allowed value. However, the power factor should not be too high and the voltage should not be too low. If reducing the rotor current fails to reduce the stator current to the allowable value, contact the dispatcher to reduce the active load of the generator.
2. When the rotor of a running generator is grounded at one point, the excitation system should be cleaned and inspected. If it is a stable metal ground, the machine must be stopped immediately. If the cause is not found, monitoring must be reinforced and the machine must be stopped for treatment. When the generator excitation system is grounded at one point, be careful to avoid artificially caused two-point earth faults
3 when condensation drips (i.e. condensation) appear on the generator stator coil or air cooler. , Afterwards,the generator inlet air temperature must be increased to eliminate condensation.
4. When the air cooler leaks, a group of leaking coolers should be disabled and the ground water should be removed. the generator The temperature difference between the two ends of the inlet air does not exceed 3 degrees
5. When strong ring sparks occur on the surface of the generator slip ring or exciter collector, the slip ring will change color and the collector surface will be burned. When it is black, the cause must be immediately eliminated and the cause must be identified to quickly eliminate sparking and overheating, if ineffective, immediately reduce the excitation current or even. reduce active load to reduce spark overheating to allowable regulations. If it is still ineffective, stop the machine
6. When the generator sends a signal to disconnect the differential protection, the generator differential protection. should be turned off immediately, the stator current should be reduced as much as possible, and the cause of the secondary circuit of the generator differential converter should be checked. If the cause cannot be found, stop the machine for inspection
7. When the automatic cabinet breaks down, it should be repaired in time and put into use. The generator is not allowed to operate for a long time under the manual cabinet setting. When adjusting the active power of the generator, you must first adjust the reactive power appropriately to prevent the generator from losing its static stability
8. When a short circuit occurs directly at the generator output, the stator coil must be. carefully inspected. If the stator coil is found to be deformed, the connecting wires aretight, the pads fall off, water leaks and other abnormal phenomena should be stopped for inspection
9. The generator smokes or catches fire, remove it. Except for generator fire management rules, the cooling water system must continue to operate and the water supply must not be stopped until the generator The fire is completely extinguished.
10. A long-term short circuit occurs outside the switch of the generator-transformer unit and the pointer of the stator ammeter When it points to the maximum and the voltage drops sharply, if the device protection refuses to operate, the generator-transformer assembly must be immediately dismantled manually.List.