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1745 / 2020-10-01 07:24:29
Polarization-depolarization Current Method for XLPE Cable Insulation Diagnosis
Polarization-depolarization current, XLPE, insulation diagnosis, voltage resistance test, aging factor
High Voltage and Insulation Technology > High voltage testing and measurement
终稿
Haiyong Liu / Shandong Binzhou Power Supply Company
XLPE cable is now widely used in distribution network, and its insulation diagnosis is related to power grid reliability. Polarization and depolarization current (PDC) method is applied to evaluate degradation status of various aging overhead insulated lines. The experimental samples are originated from actual operation cables and laboratory accelerated aging cables, characterized by different operation time. In this paper, voltage resistance tests of actual cables indicate influences of aging on insulation degeneration. And XLPE samples are accelerated of 80℃ thermal aging, and then measured by PDC test at constant temperature condition. The obtained results indicate that with increasing of aging time, the impurities show that impurities polarization dominates the depolarization current, and characteristic parameter of aging factor is growing from “good” to “critical”. Peak-differenating analysis confirms the evolution of aging trend, and functions as a temporal variation law. The verification results prove that PDC method is an effective and rapid access of degradation status assessment.

 
重要日期

  • 会议日期

    11月02日

    2020

    至

    11月04日

    2020

  • 10月27日 2020

    初稿截稿日期

  • 11月03日 2020

    报告提交截止日期

  • 11月04日 2020

    注册截止日期

  • 11月17日 2020

    终稿截稿日期

主办单位
IEEE IAS Student Chapter of Huazhong University of Science and Technology (HUST)
承办单位
Huazhong University of Science and Technology
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