High-resistance grounding fault detection and location in DC railway system

Dong, Chenyang; He, Jinghan; Wang, X.K.; Xu, Jie; Lu, Yu; Bo, Zhiqian

doi:10.1049/cp.2012.0014

Cited by 7 publications

(3 citation statements)

References 6 publications

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“…An amplitude-based low-current defect detection approach that uses publicly accessible data on energy consumption trends and internal load records from various train systems. The proposed method analyzes fluctuations in the overall load amplitudes to identify potential faults occurring on distribution lines with low currents [13]. However, successfully implementing this technique in practice and determining the optimal threshold values for identifying faults proved challenging.…”

Section: Research Gapmentioning

confidence: 99%

Adaptive DDL Algorithm to Elucidate the Protection Misoperation in Malaysian Rapid Rail DC Traction System

Kumar,

Othman,

Wahab

et al. 2024

IEEE Access

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In modern railway traffic systems, direct current (DC) electrification is a prevalent choice, with numerous traction networks adopting a variety of voltage levels to accommodate varying load current dynamics. These dynamics are influenced by passenger density, aggregate demand for electrical power, headways, and frequency of locomotive operations. Load currents are prone to surges during periods of dense traffic and transient phases such as acceleration, deceleration, and the start-stop sequences of trains. Such surges hold the potential to precipitate fault currents within the traction system, which are similar to those engendered by external anomalies. Conventional protection systems, such as the Détection Défaut Ligne'-French for 'Line Fault Detection), may not always effectively identify remote faults or prolonged overcurrent situations. These scenarios necessitate an advancement beyond the traditional fault detection methodologies, which are primarily reliant on fixed thresholds and may not account for the dynamic nature of the railway system's electrical load. This paper addresses the limitations inherent in the existing DDL protection mechanisms by focusing on the feeder attributes specific to the DC Traction System. In pursuit of this objective, we introduce an innovative adaptive current DDL algorithm to refine the rigid threshold paradigm inherent in the conventional approach. To facilitate a pragmatic assessment, the Rapid Rail network of Malaysia serves as a reference for emulating the railway's electrical system. This comprehensive analysis yields insights that are potentially useful for safety protocols in DC electrified railroad traffic systems

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Section: Research Gapmentioning

confidence: 99%

Adaptive DDL Algorithm to Elucidate the Protection Misoperation in Malaysian Rapid Rail DC Traction System

Kumar,

Othman,

Wahab

et al. 2024

IEEE Access

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“…The reasons of these faults are as follows. (1) Natural factor: after operating for a long time, insulation aging, mutual extrusion, jacket layer corrosion may cause high-resistance grounding fault 1 .…”

Section: Grounding Fault In DC Systemmentioning

confidence: 99%

“…Over 90% of electrical system faults start as grounding faults 1,2,3 . In general, there are two kinds of grounding fault in DC traction power supply system, high-resistance grounding fault and low-resistance grounding fault.…”

Section: Introductionmentioning

confidence: 99%

Grounding fault location in dc railway system

Wang

Dong

et al. 2013

22nd International Conference and Exhibition on Electricity Distribution (CIRED 2013)

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Due to the increased strain of the urban ground traffic, the DC railway transit system has been developed rapidly to solve the traffic problems. Therefore, it is important to ensure the security and reliability of the DC traction power supply system. Low-resistance grounding fault has an extremely deadly effect against the safe operation of urban rail transit system. Furthermore, it is difficult to locate the fault position because of little available statistical information. In order to locate the fault position rapidly, a method is proposed by transforming the DC traction power supply system circuit into the Bergeron equivalent circuit and calculating the voltage distribution of the catenary. This paper the details of this algorithm.. Simulations are used to verify the accuracy of this approach.

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