Patterns of the Ultrasonic Signal caused by Partial Discharge in Transformer

변압기 부분방전에 의한 초음파 신호의 발생형태

  • 권동진 (한전 전력연구원 전력계통연구실) ;
  • 최인혁 (한전 전력연구원 전력계통연구실) ;
  • 정길조 (한전 전력연구원 전력계통연구실) ;
  • 박찬영 ((주)담텍) ;
  • 나현석 ((주)담텍) ;
  • 박재준 (중부대학교 정보공학과)
  • Published : 2000.07.01


Generally, it is known that many partial discharges are occurred in one voltage cycle. In this case, it is not easy to distinguish between ultrasonic signals caused by the partial discharge. We describes a pattern of the ultrasonic signal by the partial discharge in transformer. The test setup for ultrasonic signal measurement was to simulate a internal partial discharge by using a needle to plane electrodes. We compared the number of partial discharge and ultrasonic signal in one voltage cycle. The results showed that it was possible to distinguish between ultrasonic signals by analysing partial discharge detection method and ultrasonic signal on time domain.