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

The Korean Institute of Electrical Engineers (대한전기학회)
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Development and Site Evaluation of the On-line Partial Discharge Measuring System on the 13 kV Class Stator Windings for Hydro Generator

13 kV급 수력발전기 고정자 권선용 On-line 부분방전 측정 시스템 개발 및 현장적용 평가

  • 선종호 (한국전기연구원 전력설비진단연구그룹) ;
  • 황돈하 (한국전기연구원 전력설비진단연구그룹) ;
  • 윤영호 (동우전기공업(주)) ;
  • 신병철 ((주)인텍C&I) ;
  • 오봉근 (한국수자원공사 수자원연구원) ;
  • 강동식 (한국전기연구원 전력설비진단연구그룹)
  • Published : 2006.04.01
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Abstract

In order to improve the reliability of stator windings for hydro generators, it is necessary to detect the defective point and life assessment of the high voltage windings. Especially the on-line partial discharge (PD) test provides the ability to monitor effects, such as slot discharge, internal discharge, and end-winding discharge without interrupting generators, this method has been proven the major testing technology in high voltage rotating machines nowadays. The purpose of this paper is to describe the method of the on-line PD measurement on stator windings for hydro-generator with 13 [kV] class ceramic coupler (CC), on-line PD measuring system, terminal box, and index parameters. Also, the developed PD measuring system and 13 [kV] class CC were installed Daechung-dam generator #2. It was found that this installed sensor and system had good electrical characteristics to detect PD activity during the operating condition with its detection frequency band is between several and several tens MHz.

Keywords

References

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