Fault Diagnosis Based on Multiscale Texture Features of Cable Terminal on EMU of High-Speed Railway

Guo, Lan-Ping; Cao, Weidong; Bai, Longlei; Zhang, Jingkang; Xing, Limeng; Xiang, Enxin; Zhou, Lijun

doi:10.1109/tim.2020.3025375

Cited by 23 publications

(9 citation statements)

References 21 publications

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“…The inspection methods for cable systems can be split into two categories: online monitoring and defect identification. [22, 23] Partial discharge detection, reflection measurement, ultraviolet detection, and infrared (IR) detection belong to the online monitoring approaches. X‐ray inspection, Acoustic emission (AE) detection, and terahertz non‐destructive testing are typical defect detection technologies.…”

Section: Online Monitoring and Defect Detection Methodsmentioning

confidence: 99%

“…To further identify the type of discharge inside the cable terminals and determine the discharge location, L. Zhou et al. [23, 28] established a partial discharge testing system to study the discharge onset/extinction voltage, the discharge development process, and associated spectrum characteristics under different low‐temperature conditions. Moreover, characteristics of both positive and negative half‐perimeter asymmetry of the discharge spectrum were revealed, which provided explanations for the frequent explosions of the vehicle cable terminals operating in alpine regions.…”

Section: Methodsmentioning

confidence: 99%

“…[27] where an overall classification accuracy of 96% was achieved. To further identify the type of discharge inside the cable terminals and determine the discharge location, L. Zhou et al [23,28] established a partial discharge testing system to study the discharge onset/extinction voltage, the discharge development process, and associated spectrum characteristics under different low-temperature conditions.…”

Section: Partial Discharge Detectionmentioning

confidence: 99%

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Review of condition monitoring and defect inspection methods for composited cable terminals

Cao

et al. 2023

High Voltage

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Composited cable terminals are critical for reliable power delivery of traditional and traction power supply systems. During its operation, the cable terminal continually undergoes complex circumstances where humidity, temperature, field strength, mechanical stress and other factors continuously change at different levels. In extreme cases, defects or even failures may occur in the cable terminals, leading to catastrophic accidents. This makes the condition monitoring and defect detection of composited cable terminals become an imperative need for the power industry. The “state‐of‐the‐art” technology of cable terminal condition assessment is focussed and a systematic review of the current research progress of cable terminal condition assessment from the operation circumstances to failure mechanisms is provided. It covers both online/offline condition monitoring methods and defects detection approaches. In addition, challenges and future research directions for cable terminal condition assessment are also addressed. It is concluded that the non‐destructive and non‐intrusive methods like terahertz imaging and ultrasonic testing, and multi‐source information fusion methods as well as the digital twin technology have been gaining popularity for cable terminal defect inspection. It is expected the presented work can provide a global field of vision for further advancement of both scholars and industrial engineers in this field.

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Section: Online Monitoring and Defect Detection Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Partial Discharge Detectionmentioning

confidence: 99%

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Review of condition monitoring and defect inspection methods for composited cable terminals

Cao

et al. 2023

High Voltage

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“…Ethylene propylene rubber (EPR) has become one of the fastest developing synthetic rubbers in the past 20 years and has been widely used as the train-mounted cable insulation material for electric locomotive due to its excellent mechanical properties, ozone resistance, thermal resistance, electrical insulation and chemical corrosion resistance [1][2][3]. The service status of EPR cables onboard electric locomotive is directly related to the safe and reliable operation of trains, and the reliability of EPR cable largely depends on the ageing degree of insulation [4][5][6]. According to the statistics of HXD1D electric locomotive EPR cable insulation breakdown accidents, no matter the cable body or cable terminal breakdown explosion, the frequency at the bending position is high, which indicates that the bending state aggravates the ageing degree of trainmounted EPR cable insulation.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on ageing characteristics of electric locomotive ethylene propylene rubber cable under mechanical–thermal combined action

et al. 2022

Self Cite

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The train-mounted ethylene propylene rubber (EPR) cables of electric locomotive are partly restricted by the body structure and spatial layout and are in a combined environment of strong mechanical bending and thermal ageing. The degradation characteristics of the insulation layer have not yet received sufficient attention. In order to study the ageing characteristics of EPR cables of electric locomotive under the combined action of machine and thermal, this paper designs a bending-thermal combined ageing test platform for cables with a temperature of 135°C, bending diameter of 393.52 mm, 590.28 mm and unbending cables, and tests after ageing. The product has been tested by infrared spectroscopy, scanning electron microscopy, elongation at break and broadband dielectric spectroscopy. The research results show that the bending outer part of the train-mounted EPR cable is a pain point. Under the combined action of bending and thermal, whether it is microstructure or macro performance, the degradation rate and degree of the bending of outer insulation layer are greater than the value under a single thermal ageing condition. Mechanical bending has an accelerating effect on the ageing of the EPR insulation layer. The research results can provide a reference for the ageing characteristics of the train-mounted EPR cable under the bending-thermal synergy and the evaluation of operating state of the train-mounted EPR cable under bending-thermal operating conditions.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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“…As for the detection method, partial discharge is one of the most popular tools for detecting the insulation internal state in cable terminals [6][7][8]. A test circuit was previously built [9,10], and it successfully detected the partial discharge signal from air defects inside the cable through the shock wave voltage method. Previous studies [11][12][13][14] also successfully detected the partial discharge signal inside the cable by UHF detection and the HF/UHF joint analysis method.…”

Section: Introductionmentioning

confidence: 99%

A testing method with steep impact voltage inspecting the internal defects in EMU roof cable termination

Sun

Ding

et al. 2021

IET Science Measure & Tech

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A high-voltage cable terminal on the roof of a high-speed electric multiple unit operates in an intermittent impact load environment. The internal defects of the cable terminal are accelerated and are likely to cause insulation failure. Therefore, in this study, a steep impact voltage method is proposed to identify defective cable termination and establish a thermal and electric field model of the cable termination to analyse the defect development process. The results demonstrated that the interface performance of the cable terminal decreased after operation, and the internal insulation broke down under a steep-wave impulse voltage. Under the operating voltage, there was an electric field concentration at the interface between the stress layer and the insulation layer of the cable terminal that can cause partial discharge within the defect located in this part. The thermal field distortion at the cable terminal joint was obvious, and the resulting air gap reduced the interface performance. Field distortion aggravates the insulation damage under frequent thermal shock and causes insulation accidents. This study provides an experimental reference and theoretical basis for the design and operation of cable terminations.

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Fault Diagnosis Based on Multiscale Texture Features of Cable Terminal on EMU of High-Speed Railway

Cited by 23 publications

References 21 publications

Review of condition monitoring and defect inspection methods for composited cable terminals

Review of condition monitoring and defect inspection methods for composited cable terminals

Experimental study on ageing characteristics of electric locomotive ethylene propylene rubber cable under mechanical–thermal combined action

A testing method with steep impact voltage inspecting the internal defects in EMU roof cable termination

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