Assessing Aging Status and Type of XLPE Cable Insulation With a Graphic Approach Based on PDC Measurement

The polarization and depolarization current (PDC) measurement has been widely used to assess the aging degree of cross-linked polyethylene (XLPE) cables. However, the aging type identification of XLPE cables has not been fully considered. In this study we conduct PDC measurement on thermal-aged and...

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Bibliographic Details
Published inIEEE transactions on power delivery Vol. 37; no. 6; pp. 5114 - 5123
Main Authors Zhou, Kai, Yuan, Hao, Li, Yuan, Li, Mingzhi, Li, Zerui, Lin, Siyan
Format Journal Article
LanguageEnglish
Published New York IEEE 01.12.2022
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Aging
Analytic hierarchy process
Cables
combined weighting
Cross-linked polyethylene
Current measurement
Depolarization
Dielectrics
Evaluation
Insulation
Mathematical analysis
Parameter sensitivity
polarization and depolarization current
Polygons
Power cables
radar chart
Semiconductor device measurement
Trees - insulation
Voltage measurement
Weighting methods
XLPE cable
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Summary:The polarization and depolarization current (PDC) measurement has been widely used to assess the aging degree of cross-linked polyethylene (XLPE) cables. However, the aging type identification of XLPE cables has not been fully considered. In this study we conduct PDC measurement on thermal-aged and water tree-aged XLPE cable samples respectively, upon which a graphical approach to assess the insulation condition and distinguish the aging type of XLPE cables is proposed. First, to designate the evaluation indexes of the insulation condition, multiple PDC measurement based dielectric parameters are considered. Then, to reflect the sensitivity of each evaluation index to the condition of XLPE cable, a combined weighting method based on the group fuzzy analytic hierarchy process (GFAHP) and entropy method (EM) is introduced. Furthermore, the improved radar chart method (RCM) based graphical approach is proposed to comprehensively and intuitively characterize the evaluation indexes. Finally, the aging degree of the XLPE cable samples is quantitatively assessed by calculating the area of the polygon in the chart. Simultaneously, utilizing the position of the areal coordinate and the shape characteristic parameter of the polygon, the thermal-aged and water tree-aged samples are effectively distinguished.
ISSN:0885-8977
1937-4208
DOI:10.1109/TPWRD.2022.3170947