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

The Korean Institute of Electrical Engineers (대한전기학회)
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Effects of Pre-formed Space Charges by Negative DC Voltages on PD Characteristics in XLPE

부극성 직류전압에 의해 사전 형성된 공간전하가 XLPE의 부분방전특성에 미치는 영향

  • 황보승 (호남대 공대 광전자공학과) ;
  • 이준호 (호서대 전기정보통신공학부)
  • Published : 2003.07.01
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Abstract

The purpose of this paper is to evaluate the effects of pre-formed space charges by DC stress on partial discharge(PD) characteristics in XLPE. We have suggested a modified pulsed electro-acoustic(PEA) method and successfully measured both space charge distribution and current simultaneously. It has been demonstrated that the PD patterns are strongly influenced by the pre-formed space charge distributions, which are hardly disappeared up to AC 8㎸ in electrode configuration including air gap between XLPE layer and electrode. From the results, it could be said that the pre-formed space charges by DC stress can play harmful and dangerous roles in insulating system under AC operating voltages because of the field distortion and localization due to the pre-formed space charge.

Keywords

References

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