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

• Published in: Electrical engineering in Japan Vol. 218; no. 2
• Main Authors: Watanabe, Koki, Sakoda, Tatsuya, Takahashi, Akira, Negishi, Naoyuki, Miyazaki, Kazunori
• Format: Journal Article
• Language: English
• 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

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...