Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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The Study of the Harmonic Currents Effects on the Transformer Vibration

고조파 전류가 변압기 진동에 미치는 영향에 관한 연구

  • Kim, Su-Yeol (Korea Electric Power Corporation Research Institute) ;
  • Kim, Yeon-Whan (Korea Electric Power Corporation Research Institute) ;
  • Kim, Jang-Mok (Korea Electric Power Corporation Research Institute) ;
  • Lim, Ik-Hun (Korea Electric Power Corporation Research Institute) ;
  • Lee, Hyun (Korea Electric Power Corporation Research Institute)
  • 김수열 (한국전력공사 전력연구원) ;
  • 김연환 (한국전력공사 전력연구원) ;
  • 김장목 (한국전력공사 전력연구원) ;
  • 임익헌 (한국전력공사 전력연구원) ;
  • 이현 (한국전력공사 전력연구원)
  • Published : 2000.03.01
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Abstract

EP(Electrostatic Precipitator) has been used to keep the natural environment from fly-ash in the industrial fields and operated in intermittent PEC(Pulse Energized Control) mode to improve dust-collecting efficiency. Intermittent PEC mode induces low-frequency harmonic currents into power system, therefore EP transformer vibrates. This continuous transformer vibration developes transformer abnormal audio-noise and if it is too much or operates in the region of natural frequency, transformer will be damaged in the end. EP interruption caused by transformer damage results in power generation stopped, power quality down and economic loss. Therefore, this paper explains harmonic currents and transformer vibration-core vibration, winding vibration, and proposes the measures of suppressing the vibration with EP operated in intermittent PEC mode. And this results is proposed to be used for future EP transformer design or EP control method to operate EP-concerned equipment safely keeping from system faults caused by transformer vibration.

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