How can we prevent the generator from oscillating and out of step? In the process of using the generator, sudden changes in load, sudden tripping of the generator motor, sudden short circuit of the system, etc., can easily cause the generator to oscillate and lose synchronization, seriously affecting the normal operation of the generator, and severely affecting the generator. The service life of this product has a very serious impact. Therefore, this article briefly introduces the main measures to prevent generator oscillation and out-of-step.
The main reasons for generator oscillation and out-of-step are that the out-of-step generator's meter pulsation amplitude is more intense than that of other generators, and the active load table's turbulence amplitude may be full scale, while other generators oscillate around the normal load value. . And the out-of-step generator active load table pointer's swing direction is opposite to other normal units. The oscillatory motion of all generators is synchronized at the time of system oscillation.
1. Strengthen the training of operating personnel to make them well-trained, skilled in operation, capable of judging accidents and dealing with accidents; strengthening the inspection and maintenance of operating equipment, making the equipment flexible in operation, stable in operation, and in good health Strengthen the maintenance of relay protection devices and make their movements accurate and reliable.
2. When the excitation regulator automatic mode is in operation, the on-duty personnel must not interfere with the operation within more than one minute. The operation should exceed the time limit. The active load of the generator should be properly reduced. Operation in manual mode should immediately increase the excitation current as much as possible to create conditions for recovery. Machine active load.
Third, if the oscillation is caused by a single unit power factor is too high, it should reduce the active power while increasing the excitation current. Increased power limit and increased stability.
Fourth, when the oscillation is caused by a system failure, in addition to the immediate increase of the excitation of the generator, it shall be treated according to the position of the factory in the system. At the delivery end, the active load of the unit should be reduced. At the receiver, the active load should be increased. If necessary, take emergency pull measures to increase the frequency and series resonance. WWW.HB1000KV.COM.
5. If the oscillation caused by the step-out of the unit of our plant fails to enter the synchronization state after taking the above measures for a certain period of time, the two units of the same period can be solved by arranging the unit and the system to be separated or according to the schedule requirements.
The oscillating or out-of-step fault of the generator is a common failure of the generator, which not only seriously affects the working efficiency of the generator, but also has a great impact on its life. Therefore, the electric power worker should be responsible for the seriousness of the work. Attitude, try to resolve the fault and ensure the normal operation of the generator.
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