High-Resistance Fault Localization Method for Underground Cables Based on Three-Dimensional Wideband Impedance Spectra
ID：177
Submission ID：187 View Protection：ATTENDEE
Updated Time：2023-11-20 13:53:26 Hits：157
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Abstract
Locating cable faults is of significant importance
for the stable operation of the power system. Currently,
mainstream methods like partial discharge testing and time-
domain reflectometry impact by issues like filtering distortions
and rapid attenuation of high-frequency signals, making it
difficult to accurately locate high-resistance cable faults. This
paper introduces a three-dimensional wideband impedance
localization method based on temperature gradients. The paper
provides a theoretical analysis of impedance at cable joints and
conducts experiments on a 57-meter cross-linked polyethylene
medium-voltage cable, the experimental results demonstrates the
effectiveness of the proposed three-dimensional wideband
impedance method.
Locating cable faults is of significant importance
for the stable operation of the power system. Currently,
mainstream methods like partial discharge testing and time-
domain reflectometry impact by issues like filtering distortions
and rapid attenuation of high-frequency signals, making it
difficult to accurately locate high-resistance cable faults. This
paper introduces a three-dimensional wideband impedance
localization method based on temperature gradients. The paper
provides a theoretical analysis of impedance at cable joints and
conducts experiments on a 57-meter cross-linked polyethylene
medium-voltage cable, the experimental results demonstrates the
effectiveness of the proposed three-dimensional wideband
impedance method.
Keywords
underground cables; high resistance fault; broadband impedance spectrum; location detection
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