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燃气发电机组:发电机失磁缘由及处理方法!

来源:http://zuiai9.com   发布于:2019-10-31

  发电机失磁是发电机剩磁的消失。剩磁是指铁磁材料在磁化过程中,外部磁场消失后,铁磁材料所保留的磁场。发电机剩磁是指固定转子铁芯在停机后的剩磁。

  Generator loss of excitation is the disappearance of generator remanence. Remanence refers to the magnetic field retained by ferromagnetic materials when the external magnetic field disappears in the process of magnetization. Generator remanence refers to the remanence of fixed rotor core after shutdown.

  为什么发电机必须有剩磁?

  Why do generators have to have remanence?

  对于自激发电机,所产生的电力是由剩余的磁性产生,然后提供给转子绕组,以加强转子磁场。通过正反馈逐步提高发电机的输出电压,达到额定电压。如果没有剩磁,发电机就不能发电。

燃气发电机组

  For self excited motors, the power generated is generated by the residual magnetism, which is then supplied to the rotor winding to strengthen the rotor magnetic field. Through positive feedback, the output voltage of the generator is gradually increased to the rated voltage. If there is no remanence, the generator cannot generate electricity.

  发电机损耗的原因是什么?

  What is the cause of generator loss?

  1)发电机长期不使用,导致出厂前铁芯剩磁损耗,励磁绕组无法建立适当的磁场。此时发电机将正常运行,但不会产生电力。2)当发电机停止时,先停止原动机(柴油机、汽油机等),然后切断负载(电器等),消耗堆芯剩磁,使发电机失磁。

  1) the generator is not used for a long time, resulting in the loss of residual magnetism of the core before leaving the factory, and the excitation winding is unable to establish the appropriate magnetic field。 At this time, the generator will operate normally, but will not generate electricity。 2) when the generator stops, first stop the prime mover (diesel engine, gasoline engine, etc。), then cut off the load (electrical appliances, etc。), consume the residual magnetism of the core, and make the generator lose excitation。

  如何处理发电机损耗?

  How to deal with generator loss?

  1)断开自动调压器(AVR)与励磁机定子绕组的连接;2)将24V电压的直流电源(如电池)连接到励磁机定子绕组上(注意两者的正极和负极要相互对应);3)启动发电机组,以额定转速运行一段时间。

  1) disconnect the automatic voltage regulator (AVR) from the exciter stator winding; 2) connect the 24V DC power supply (such as battery) to the exciter stator winding (note that the positive and negative poles of the two should correspond to each other); 3) start the generator set and run it at the rated speed for a period of time.

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