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Open AccessArticle

Non-Intrusive Cable Fault Diagnosis Based on Inductive Directional Coupling

1
Department of Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2
Department of Electrical Engineering, University of South Carolina, Columbia, SC 29208, USA
*
Author to whom correspondence should be addressed.
Sensors 2018, 18(11), 3724; https://doi.org/10.3390/s18113724
Received: 12 September 2018 / Revised: 15 October 2018 / Accepted: 16 October 2018 / Published: 1 November 2018
(This article belongs to the Special Issue Sensors for Prognostics and Health Management)
This paper presents and applies an inductive directional coupling technology based on spread spectrum time domain reflectometry (SSTDR) for non-intrusive power cable fault diagnosis. Different from existing capacitive coupling approaches with large signal attenuation, an inductive coupling approach with a capacitive trapper is proposed to restrict the detection signal from transmitting to power source and to eliminate the effect of the power source impedance mismatch. The development, analysis, and implementation of the proposed approach are discussed in detail. A series of simulations and experiments on cables with different fault modes are conducted, along with comparison of existing capacitive coupling, to verify and demonstrate the effectiveness of the proposed method. View Full-Text
Keywords: inductive directional coupling; impedance mismatch; non-intrusive; online diagnosis; signal attenuation; SSTDR inductive directional coupling; impedance mismatch; non-intrusive; online diagnosis; signal attenuation; SSTDR
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MDPI and ACS Style

Hu, S.; Wang, L.; Gao, C.; Zhang, B.; Liu, Z.; Yang, S. Non-Intrusive Cable Fault Diagnosis Based on Inductive Directional Coupling. Sensors 2018, 18, 3724.

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