Effect of Temperature and Voltage Application Time on Space Charge Decay of LDPE and HDPE

• Mitsumoto Shinichi

  Ube National College of Technology

• Nagao Masayuki

  Toyohashi University of Technology

• Fu Mingli

  Areva T&D Ltd

• Dissado Len. A.

  University of Leicester

• Fothergill John. C.

  University of Leicester

抄録

Polyethylene is widely used as insulation for power cables. In this paper, the effect of temperature and voltage application time on the decay of space charge in LDPE and HDPE is described. When the applied voltage of 18kV was removed negative space charge was mainly found in the bulk region of the LDPE samples, whereas positive space charge was predominantly observed in HDPE samples. The space charge decay time in LDPE was shorter than that in HDPE suggesting that trapped positive charge was not de-trapped easily in HDPE. The space charge decay time also decreased with increasing magnitude of the anode (LDPE) and cathode (HDPE) field measured just before voltage was removed. The value of the apparent activation energy of space charge decay was estimated from the Arrhenius plot of the relaxation time of the residual space charge was found to be larger in HDPE than in LDPE. It is suggested that the trap level of positive charge in HDPE was deeper than that of negative charge in LDPE.

収録刊行物

• 電気学会論文誌．　Ａ

  電気学会論文誌．　Ａ 130 (6), 607-608, 2010

  一般社団法人 電気学会

キーワード

• LDPE
• HDPE
• space charge decay
• activation energy

詳細情報

• CRID: 1390001204599332608
• NII論文ID: 10026382411
• NII書誌ID: AN10136312
• DOI: 10.1541/ieejfms.130.607
• ISSN: 13475533
• ISSN: 03854205
• Web Site: http://www.jstage.jst.go.jp/article/ieejfms/130/6/130_6_607/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可