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

The Korean Institute of Electrical Engineers (대한전기학회)
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A Study on the Partial Discharge Phase Properties with Branch Type Eleotrical Tree Growth in XLPE Cable Insulation

XLPE 케이블 절연체에서의 가지형 전기트리 성장에 따른 부분방전 위상 특성 연구

  • 강동식 (한국전기연구원 신전력기기그룹) ;
  • 선종호 (한국전기연구원 신전력기기그룹) ;
  • 김위영 (한국전기연구원 고전압시험실 선임기술원) ;
  • 이홍식 (한국전기연구소 전기물리그룹 그룹장) ;
  • 박정후 (부산대학교 공대 전자전기통신공학부)
  • Published : 2002.05.01
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Abstract

In order to improve the reliability of XLPE cables, it is necessary to find the useful diagnostic parameter according to long term aging. This paper described the change of partial discharge(PD) phase Properties of XLPE cable insulation with branch type electrical tree degradation. for long term aging. To understand the PD Properties with $\phi$ -q-n distributed shape of XLPE insulation, specimens were prepared by 22.9㎸ distribution cable and made in a type of block(16${\times}$16${\times}$3[mm]). Ogura needles having tip radius of l0${\mu}{\textrm}{m}$ were inserted into each block pieces. The measuring system was consisted of PD detector, digitizer for digital conversion, VXI system for signal processing. The PD properties of the specimens were measured from initiation of tree to breakdown and their characteristics were analyzed. We analyzed the relationship between electrical properties(PD Quantity, PD initiation angle, PD extinction angle, PD occurrence angle : (PD extinction angle - PD initiation angle)) and the normalized aging rate. We found PD parameter, PD initiation angle and occurrence angle, which are a useful diagnostic parameter in estimating the branch type electrical tree for XLPE insulation condition.

Keywords

References

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