Effect of Over Zone Feeding on Rail Potential and Stray Current in DC Mass Transit System

Du, Guifu; Wang, Chonglin; Liu, Jianhua; Li, Guoxin; Zhang, Dongliang

doi:10.1155/2016/6304726

Cited by 20 publications

(14 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Can irrelevant information be hidden efficiently, e.g., by category, tagging, etc.? (6) Is the required exchange of information during shift changes minimized by the system?…”

Section: Selected and Adapted Iso 11064-5 Requirementsmentioning

confidence: 99%

“…Corrosion induced by stray current (SC) is a significant problem of electrified transportation systems (ETSs) and has attracted a lot of attention, especially for systems operated at dc, such as light railways, metros and rapid transit in general: general system analysis [ 1 , 2 , 3 , 4 , 5 , 6 , 7 ] including design optimization and defects [ 8 , 9 ], impact on buried conductive pipes [ 10 , 11 ], with both deterministic and stochastic approaches [ 12 , 13 ]. A marginal impact may be expected also for ac railways [ 14 , 15 ], but the lower intensity of the traction current and the lesser impact of ac on the chemical mechanism of corrosion make it a less relevant problem.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Stray Current Protection and Monitoring Systems: Characteristic Quantities, Assessment of Performance and Verification

Mariscotti

2020

Sensors

View full text Add to dashboard Cite

Electrified transportation systems (ETSs) are affected by stray current problems impacting within and outside the right of way on reinforcement, buried metal structures and foundations. Stray current protection systems have recently been integrated in the track structure. Track electrical quantities are, thus, usually measured to assess track insulation and protection efficiency but should be backed up by additional measurements at the affected structures and installations, in order to assess their exposure and risk of corrosion. Ideally, a stray current monitoring system proceeds from the measurement of these quantities, to data collection and archival, to data presentation, analysis and prediction. Feasible sensors and probes, the impact of environmental conditions and uncertainty are considered for the measurement at the physical level. Data analysis is critically reviewed considering the variability of operating conditions and the effectiveness of each quantity as indicator of track insulation and protection efficiency. Given the normal spread of values, for data presentation and interpretation, suitable techniques are considered based on averaging, curve similarity and feature extraction, and also for the task of assessing compliance to limits or reference values and establishing a trend that may drive informed maintenance decision.

show abstract

“…Can irrelevant information be hidden efficiently, e.g., by category, tagging, etc.? (6) Is the required exchange of information during shift changes minimized by the system?…”

Section: Selected and Adapted Iso 11064-5 Requirementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Stray Current Protection and Monitoring Systems: Characteristic Quantities, Assessment of Performance and Verification

Mariscotti

2020

Sensors

View full text Add to dashboard Cite

show abstract

“…A unified chain model of a DC traction power system was also proposed to simulate the distribution of rail potential and stray current (Du et al, 2016). Field tests and simulations were carried out to study whether over-zone feeding has an impact on rail potential and stray current.…”

Section: Monitoring and Evaluation Of Stray Current-induced Corrosionmentioning

confidence: 99%

A review on stray current-induced steel corrosion in infrastructure

2017

View full text Add to dashboard Cite

Metallic corrosion can cause substantial damage at various levels and in almost all types of infrastructure. For metallic corrosion to occur, a certain external environment and the presence of corrodents are the prerequisites. Stray current-induced corrosion, however, is a rather underestimated issue in the field of corrosion and civil engineering. Stray current arising from power sources and then circulating in metal structures may initiate corrosion or even accelerate existing corrosion processes. The most frequent sources of stray current are light rail transits and subways, which are also main traffic tools with continuously accelerating urbanization all over the world. Stray currents from these systems may easily flow into nearby metallic structures, making stray current-induced corrosion the most severe form of damage of buried structures, such as tunnels, pipelines, and various underground reinforced concrete structures. The objective of this paper is to critically review stray current-induced steel corrosion in infrastructure with regard to sources of stray current and the characteristics and mechanism of stray current corrosion in view of electrochemical aspects. The methods and techniques for the evaluation, monitoring, and control of stray current-induced corrosion for steel and reinforced concrete structures are also presented and discussed.

show abstract

“…These studies are based on simulation models with single or double power sections, and the effect of power distribution on rail potential when multiple trains run in multiple sections is ignored. Cross-track regeneration supply and over zone feeding have an impact on rail potential and stray current [10,14]. Du proposed a power distribution model to analyze the abnormal rise of rail potential based on the power distribution of the system [11].…”

Section: Ac 35kvmentioning

confidence: 99%

“…Rail potential is highly affected by the power distribution of DC traction power systems [10,11]. For the electrical connectivity of the catenaries and running rails in the whole line, an abnormal rise of rail potential caused by the regenerative power transferring over power sections is obvious [11].…”

Section: Introductionmentioning

confidence: 99%

Maximum Safety Regenerative Power Tracking for DC Traction Power Systems

Zhang

et al. 2017

Energies

Self Cite

View full text Add to dashboard Cite

Direct current (DC) traction power systems are widely used in metro transport systems, with running rails usually being used as return conductors. When traction current flows through the running rails, a potential voltage known as "rail potential" is generated between the rails and ground. Currently, abnormal rises of rail potential exist in many railway lines during the operation of railway systems. Excessively high rail potentials pose a threat to human life and to devices connected to the rails. In this paper, the effect of regenerative power distribution on rail potential is analyzed. Maximum safety regenerative power tracking is proposed for the control of maximum absolute rail potential and energy consumption during the operation of DC traction power systems. The dwell time of multiple trains at each station and the trigger voltage of the regenerative energy absorbing device (READ) are optimized based on an improved particle swarm optimization (PSO) algorithm to manage the distribution of regenerative power. In this way, the maximum absolute rail potential and energy consumption of DC traction power systems can be reduced. The operation data of Guangzhou Metro Line 2 are used in the simulations, and the results show that the scheme can reduce the maximum absolute rail potential and energy consumption effectively and guarantee the safety in energy saving of DC traction power systems.

show abstract

Effect of Over Zone Feeding on Rail Potential and Stray Current in DC Mass Transit System

Cited by 20 publications

References 17 publications

Stray Current Protection and Monitoring Systems: Characteristic Quantities, Assessment of Performance and Verification

Stray Current Protection and Monitoring Systems: Characteristic Quantities, Assessment of Performance and Verification

A review on stray current-induced steel corrosion in infrastructure

Maximum Safety Regenerative Power Tracking for DC Traction Power Systems

Contact Info

Product

Resources

About