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Defect Diagnosis Criterion for the Cross-Bonding Metallic Sheath Grounding System of 110 kV Power Cables
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DOI：10.1109/TPWRD.2026.3655728.png)
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Abstract
En 中文
Cable sheath grounding systems account for a high proportion of high-voltage power cable system defects. Currently, defect diagnosis criteria for power cable metallic sheaths are imprecise, which makes it difficult to identify defects in time and avoid losses. This paper proposes a diagnostic criterion to identify power cable metallic sheath defects through the sheath current in a cross-bonding sheath grounding system. A calculation method that integrates the theories of multiconductor transmission lines, finite element electromagnetic field calculations and two-port circuit networks is established. This method is accurate, flexible and quick; consequently, the probability distributions of the sheath currents with every defect and three random factors are obtained. Using the probability density function of the characteristic variables for normal and defect sheath grounding systems, the diagnosis criterion of the defect type is formulated on the basis of the minimum error rate criterion.
Keywords:
Cables
Grounding
Transmission line matrix methods
Power cables
Integrated circuit modeling
Standards
Power systems
Multiconductor transmission lines
High-voltage techniques
Finite element analysis
cable shielding
sheath current
probability density
fault diagnosis
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IF:
3.7
Papers:
9.1K
Citations:
2.2W
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