Journal of KSNVE (소음진동)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Modal Parameter Identification of a Generator Stator Frame for Fossil Power Plants

화력 발전용 발전기 고정자 프레임의 모드매개변수 규명

  • 김철홍 (한국중공업(주) 기술연구원) ;
  • 류석주 (한국중공업(주) 기술연구원) ;
  • 박종포 (한국중공업(주) 기술연구원)
  • Published : 1999.06.01
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Abstract

This paper presents numerical and experimental results of modal parameter identification in a generator stator frame for 500 MW fossil power plants. A commercial finite element analysis S/W was employed for modal analysis. The generator is excited by alternating electromagnetic forces, mainly of 120 Hz in 60 Hz machines, due to magnetic field and electric current in windings. It is necessary to verify that the stator frame has adequate frequency margin from the excitation frequency to avoid possible resonance when operating. Thus, frequency margin required for the stator frame is established using the numerical and experimental results. The results show that the stator frame meets the frequency-margin requirements. Also, results of modal analysis for design modification in order to reduce weights of the stator frame without deteriorating vibration characteristics are presented.

Keywords

References

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