Section Locating of Water‐Tree Degraded Cable by Measuring Residual Charges Induced by Induced Voltage Pulses

ABSTRACT To establish a novel section locating technique for a water‐tree degraded 22 kV cross‐linked polyethylene (XLPE) cable, that is, included in another undegraded cables, we measured a reflected injection pulse at the impedance mismatch, which is dependent on water trees. The injection pulse w...

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Bibliographic Details
Published inElectrical engineering in Japan Vol. 218; no. 2
Main Authors Watanabe, Koki, Sakoda, Tatsuya, Takahashi, Akira, Negishi, Naoyuki, Miyazaki, Kazunori
Format Journal Article
LanguageEnglish
Published Hoboken Wiley Subscription Services, Inc 01.06.2025
Subjects
Cables
Cross-linked polyethylene
Induced voltage
inductive voltage pulse
Pulse propagation
residual‐charge measurement
section locating
Voltage pulses
water tree
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Summary:ABSTRACT To establish a novel section locating technique for a water‐tree degraded 22 kV cross‐linked polyethylene (XLPE) cable, that is, included in another undegraded cables, we measured a reflected injection pulse at the impedance mismatch, which is dependent on water trees. The injection pulse was propagated into cables to be measured, and the measured arrival times of reflected pulses containing residual charges due to water trees were varied depending on the locations of water‐tree degraded cables. The section locating was achieved by using the arrival time of the reflected pulse.
Bibliography:Translated from Volume 145 Number 1, pages 23–29, DOI
IEEJ Transactions on Fundamentals and Materials
(Denki Gakkai Ronbunshi A).
10.1541/ieejfms.145.23
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ISSN:0424-7760
1520-6416
DOI:10.1002/eej.23506