Impact of rail impedance intrinsic variability on railway system operation, EMC and safety
TLDR
This work presents the physical and mathematical groundings of rail electrical parameters (dc and ac resistance, ac internal and external inductance) and experimental results available in the literature, discussing variability and reliability for each interface.Abstract:
Running rails in electrified transportation systems are the interface element for several phenomena related to system performance, electromagnetic compatibility and safety: useful voltage at rolling stock, short circuit current, induced voltage, stray current, and track circuit operation. This work presents the physical and mathematical groundings of rail electrical parameters (dc and ac resistance, ac internal and external inductance) and experimental results available in the literature, discussing variability and reliability for each interface. The results consist thus of the identification of the relevant rails longitudinal electrical parameters, the presentation of a set of reliable experimental values, and the discussion of the best approach to manage their variability and uncertainty.read more
Citations
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Journal ArticleDOI
Stray Current Protection and Monitoring Systems: Characteristic Quantities, Assessment of Performance and Verification.
TL;DR: 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, in order to assess their exposure and risk of corrosion.
Proceedings ArticleDOI
A Uniform Model for Stray Current of Long-Line DC Metro Systems
TL;DR: Wang et al. as mentioned in this paper proposed a uniform model to evaluate the stray current in the long line with variable metro structures, and the model is verified by comparing the test data and simulation data of Shenzhen metro.
Journal ArticleDOI
Electrical Safety and Stray Current Protection With Platform Screen Doors in DC Rapid Transit
TL;DR: A novel PSD bonding arrangement is proposed that reconciles insulation for utmost electrical safety level and bonding for traction fault protection, including stray current limitation as constraint.
Journal ArticleDOI
Application of a Non-carrier-Based Modulation for Current Harmonics Spectrum Control during Regenerative Braking of the Electric Vehicle
TL;DR: The selective harmonic elimination modulation technique (SHE-PWM) was introduced to the traction drive with a three-level inverter to reduce specific catenary current harmonics generated during regenerative braking.
Proceedings ArticleDOI
Rail Potential and Stray Current Mitigation for Urban Rail Transit With Multiple Trains Under Multiple Conditions
TL;DR: In this article , a zero-resistance converter system (ZRCS) is introduced for mitigating rail potential and stray current in urban rail transit, and the locations of switch units are optimized to improve the mitigation performance of ZRCS.
References
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Stray current control in DC mass transit systems
TL;DR: The use of floating return rails is shown to provide a reduction in stray current level in comparison to a grounded system, significantly reducing the corrosion level of the traction system running rails.
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Estimation of Stray Current From a DC-Electrified Railway and Impressed Potential on a Buried Pipe
TL;DR: In this paper, the case of a viaduct and a victim-buried pipeline is considered in detail, and the estimated impressed voltage on the pipe is compared successfully with experimental results.
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Evaluation and Control of Stray Current in DC-Electrified Railway Systems
TL;DR: To calculate the amount of stray current in the presence of the stray current control method considering different soil types through finite–element (FE) method (FEM), a UIC54 rail with insulated fastening equipment is modeled in FEMM 4.2 and analyzed with 2-D FEM.
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Evaluation of Stray Current From a DC-Electrified Railway With Integrated Electric–Electromechanical Modeling and Traffic Simulation
TL;DR: In this article, the authors describe the implementation of an integrated model for the assessment of stray current for a dc-electrified railway, in which these factors are considered, and highlight factors that determine the efficiency of the stray current collection system.