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Polarization-depolarization Current Method for XLPE Cable Insulation Diagnosis
ID：68 View Protection：ATTENDEE Updated Time：2020-10-15 15:40:39 Hits：833 Oral Presentation

Start Time：2020-11-03 11:30（Asia/Shanghai）

Duration：15min

Session：D High Voltage and Insulation Technology » D2Session 14 and Session 19

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Abstract
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.
 
Keywords
Polarization-depolarization current, XLPE, insulation diagnosis, voltage resistance test, aging factor
Speaker
Haiyong Liu
Shandong Binzhou Power Supply Company

Submission Author
Haiyong Liu Shandong Binzhou Power Supply Company
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Important Date

  • Conference Date

    Nov 02

    2020

    to

    Nov 04

    2020

  • Oct 27 2020

    Draft paper submission deadline

  • Nov 03 2020

    Contribution Submission Deadline

  • Nov 04 2020

    Registration deadline

  • Nov 17 2020

    Final Paper Deadline

Sponsored By
IEEE IAS Student Chapter of Huazhong University of Science and Technology (HUST)
Organized By
Huazhong University of Science and Technology
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