The Transactions of the Korean Institute of Electrical Engineers C (대한전기학회논문지:전기물성ㆍ응용부문C)

The Korean Institute of Electrical Engineers (대한전기학회)
권호 표지

Characteristics of Ceramic Coupler for On-line Partial Discharge Measurement in High Voltage Rotating Machines

고압 회전기 On-line 부분방전 측정용 Ceramic Coupler 특성

  • 강동식 (한국전기연구소 신전력기기그룹) ;
  • 윤대희 (한국전기연구소 신전력기기그룹 연구원) ;
  • 김용주 (한국전기연구소 신전력기기그룹 전문위원) ;
  • 이홍식 (한국전기연구소 전기물리연구그룹 그룹장) ;
  • 윤영호 (Power Plus(주)) ;
  • 박정후 (부산대학교 공과 전자전기통신공학부)
  • Published : 2002.05.01
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Abstract

In order to improve the reliability of high voltage rotating machines, it is necessary to understand the breakdown mechanism of stator windings. Especially partial discharge(PD) inception and growth are important in stator winding insulation. Recently, many research on the diagnosis of stator winding insulation for large rotating machines have been developed since the 1970s. Capacitive couplers have been the most widely used sensor for on-line partial discharge detection in rotating machines. This paper deals with the electrical on-line monitor characteristics of ceramic coupler(CC) which has been developed to continuously measure the PD activity in operating high voltage motor stator windings on site. We investigated the electrical characteristics(PD quantity, breakdown voltage and frequency response) to develop CC. This paper presents frequency characteristics and laboratory test result to compare conventional 80([F] epoxy-mica coupler(EMC) and 105[pF] CC for PD measurement with 6.6㎸ model stator windings.

Keywords

References

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