Quantitative analysis on coupling of traction current into cab signaling in electrified railways

Liu, Chang; Yang, Shiwu; Cui, Yong; Lv, Jiaqi

doi:10.1007/s40534-020-00220-z

Cited by 6 publications

(4 citation statements)

References 28 publications

(27 reference statements)

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“…The signaling system within it relies on microelectronic logic circuits and control software to generate, transmit and respond to signals, making it highly sensitive to sources of strong electromagnetic interference (EMI) (e.g., traction power systems, GSM-R mobile base stations, electric locomotives, etc.) (Yang, Chen, Chen, Cui, & Tang, 2019; Liu et al. , 2020a, b; Liu et al.…”

Section: The Impact Of Emi On the Signaling Safety Of High-speed Rail...mentioning

confidence: 99%

Reflection on methodology of the correlation between electromagnetic interference and safety in high-speed railways

Liu,

Yang,

Yang

et al. 2024

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PurposeIn the continuous development of high-speed railways, ensuring the safety of the operation control system is crucial. Electromagnetic interference (EMI) faults in signaling equipment may cause transportation interruptions, delays and even threaten the safety of train operations. Exploring the impact of disturbances on signaling equipment and establishing evaluation methods for the correlation between EMI and safety is urgently needed.Design/methodology/approachThis paper elaborates on the necessity and significance of studying the impact of EMI as an unavoidable and widespread risk factor in the external environment of high-speed railway operations and continuous development. The current status of research methods and achievements from the perspectives of standard systems, reliability analysis and safety assessment are examined layer by layer. Additionally, it provides prospects for innovative ideas for exploring the quantitative correlation between EMI and signaling safety.FindingsDespite certain innovative achievements in both domestic and international standard systems and related research for ensuring and evaluating railway signaling safety, there’s a lack of quantitative and strategic research on the degradation of safety performance in signaling equipment due to EMI. A quantitative correlation between EMI and safety has yet to be established. On this basis, this paper proposes considerations for research methods pertaining to the correlation between EMI and safety.Originality/valueThis paper overviews a series of methods and outcomes derived from domestic and international studies regarding railway signaling safety, encompassing standard systems, reliability analysis and safety assessment. Recognizing the necessity for quantitatively describing and predicting the impact of EMI on high-speed railway signaling safety, an innovative approach using risk assessment techniques as a bridge to establish the correlation between EMI and signaling safety is proposed.

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Section: The Impact Of Emi On the Signaling Safety Of High-speed Rail...mentioning

confidence: 99%

Reflection on methodology of the correlation between electromagnetic interference and safety in high-speed railways

Liu,

Yang,

Yang

et al. 2024

Self Cite

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“…The core of the EW is made of stranded copper conductor model shown in Figure 9, in the parallel approach section with a length of 100 m. (The soil environment is simulated by the filling material parameters of the region.) According to the structure and parameters of the cable and the spatial position relationship, LEF simulation is completed by drawing the system model, setting the finite element solution domain, configuring the material library, setting the solution boundary conditions of the model, setting the interference current excitation source, and dividing the grid [37][38][39].…”

Section: Finite Element Simulation Verificationmentioning

confidence: 99%

An improved quantitative assessment method on hazardous interference of power lines to the signal cable in high‐speed railway

Liu

Yang

Cui

et al. 2021

IET Electrical Syst in Trans

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High-speed railway (HSR) presents the characteristics of a heavy load, large traction current, and ballastless track-bed. As the 'neural network' of the signalling system, the line-side signal cable may threaten both human safety and control information transmission for an HSR operation when interfered with by a strong traction current. This study comprehensively investigates the electromagnetic interference (EMI) factors of the traction power supply system (TPSS) and the integrated earthing system (IES) to a signal cable and completes the electromagnetic coupling mechanism analysis of longitudinal electromotive force (LEF). Then, an improved theoretical calculation method is proposed for the multi-conductor power line network of the HSR instead of the traditional look-up table method. Regarding the essential influence of different earthing methods and cable laying conditions, the quantitative calculation of the LEF on the cable is evaluated. The validity of the theoretical method is verified through finite element simulation. Finally, the solutions to suppress the EMI are put forward for cable laying. This work provides an accurate quantitative basis for the implementation of the on-site LEF test, is significant for the design of cable laying schemes in railway engineering, and is also beneficial to ensure the safe operation of HSR.

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“…The authors used the wavelet transform with modulus maximum to detect the transient interference in traction current and verified the compatibility between the rolling stock and the track circuit [9]. We also completed the quantitative calculation of the interference coupling of the cab signalling based on the electromagnetic field theory and proposed an indirect test method for the anti‐interference of the cab signals [10]. Then, we studied the interference mechanism of the return traction current to the track circuit apparatus and TCR in the switch section within the station and proposed a method to reduce the unbalanced traction current interference by optimising the jumper position [11].…”

Section: Introductionmentioning

confidence: 99%

Research on radiated interference from diesel locomotive traction motor to cab signalling

Liu

Yang

Zhao³

et al. 2022

IET Electrical Syst in Trans

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With the railway advancement of speed and load capacity, new high-power diesel locomotives occupy a prominent position. Due to the susceptibility of onboard signal equipment comprised of microelectronic devices, the diesel locomotive's traction motor (TM) may produce serious disturbance to cab signalling, possibly distorting the signal pattern via receiving coils, even resulting in mutation and decoding error of cab signals. However, the existing research studies pay little attention to this electromagnetic interference problem. This paper studies the radiated alternating magnetic field of the TM and interference coupling path to onboard equipment. It first analyses the cab signalling working principle and clarifies the interference mechanism, focussing on the quantitative analysis of the radiated magnetic field and interference electromotive force. Then, based on the ANSYS platform, the finite element method is used to complete modelling, simulation, and verification. Finally, combined with the railway field data, a typical interference case is analysed, verifying that the distorted signal pulses under the radiated magnetic field are the primary cause of decoding failures. This research establishes the quantitative relationship between the traction radiation intensity and the interference amplitude on signals, helping explore the countermeasures, improve the cab signal decoding accuracy, and ensure transportation efficiency.

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Quantitative analysis on coupling of traction current into cab signaling in electrified railways

Cited by 6 publications

References 28 publications

Reflection on methodology of the correlation between electromagnetic interference and safety in high-speed railways

Reflection on methodology of the correlation between electromagnetic interference and safety in high-speed railways

An improved quantitative assessment method on hazardous interference of power lines to the signal cable in high‐speed railway

Research on radiated interference from diesel locomotive traction motor to cab signalling

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