Environmental 50Hz magnetic field produced by a railway line equipped with autotransformers

Lucca, Giovanni; Moro, M.

doi:10.1109/emceurope.2008.4786794

Cited by 6 publications

(3 citation statements)

References 2 publications

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“…Literatürde baralı kanal birimi sistemlerinin etrafında oluşan manyetik alanların incelendiği [3][4][5] endüstriyel ortamların ve transformatör merkezlerinin etrafında oluşan manyetik alanların incelendiği [6][7], yüksek güçlü transformatörlerin etrafında oluşan manyetik alanların incelendiği [8][9], cer tren transformatörlerinin etrafında oluşan manyetik alanların incelendiği [10], çalışmalar bulunmaktadır. Bunun yanında katener sistemlerin etrafında oluşan manyetik alanların değerlendirildiği [11][12][13][14], lokomotiflerde kullanılan pantograf sistemlerinin elektriksel ve mekanik özelliklerinin incelendiği çalışmalar bulunmaktadır [15][16][17][18]. Buna karşın lokomotiflerin etrafında ve içerisinde cer transformatörü ve baralardan kaynaklı oluşan manyetik alanların hesaplandığı çalışmaların literatürde çok sınırlı olduğu görülmektedir.…”

Section: Introductionunclassified

Calculation of Magnetic Fields Generated by Traction Transformers and Busbars in Electric Locomotive Systems by Finite Element Method

KALE¹,

Demirol²,

Sönmez³

et al. 2023

Demiryolu Mühendisliği

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The effects of the magnetic field intensity created around the power system equipment on human health are examined by various organizations. Permissible limit values have been determined by the International Commission on Non-Ionizing Radiation Protection (ICNIRP) when people are exposed to the magnetic field intensity generated by the power system equipment at a low frequency. Accordingly, the maximum allowable magnetic field intensity values for public areas and working environments are specified as 0.2mT and 1mT, respectively. In this context, it is seen that the magnetic field intensity generated by components such as traction transformer, busbar, driver, and motor used to provide traction power in locomotives are essential parameters. Therefore, it is recommended that the magnetic field intensities around these components remain below the limits for the health of passengers and personnel. For this reason, it is necessary to determine the magnetic field intensities around the components during the design phase of the locomotive systems. This study aimed to calculate the magnetic field densities generated by a traction transformer and a sample busbar structure used in locomotives. For this purpose, the geometric model of the traction transformer, a simple locomotive casing, and busbar structure was created in a three-dimensional coordinate system and transferred to the Ansys Electronics Suite finite element analysis software, and analysis studies were carried out. Finally, it is seen that the magnetic field intensities in the measurement planes determined according to the analysis results are below the limit values. Since the magnetic field intensity values change depending on the geometric structure of the model, material parameters, and operational status, the necessity of evaluating these analyses at the design stage has been emphasized within the scope of the study.

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Section: Introductionunclassified

Calculation of Magnetic Fields Generated by Traction Transformers and Busbars in Electric Locomotive Systems by Finite Element Method

KALE¹,

Demirol²,

Sönmez³

et al. 2023

Demiryolu Mühendisliği

View full text Add to dashboard Cite

show abstract

“…As these electromagnetic fields were measured inside the train, it was difficult to gauge their effects outside the train, and therefore, they were measured at several frequencies above the operating frequency of the inverter. Further, researchers measured the magnetic fields of train systems at a frequency of 50 Hz [9][10][11]. However, these studies measured the fields at a point approximately 10 m from the track, which made it difficult to acquire data from near the contact line.…”

Section: Introductionmentioning

confidence: 99%

Effects of Magnetic Fields Around Contact Lines on Magnetometers

et al. 2020

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When a current of ~300 A flows through a contact line that supplies power to a high-speed train traveling at maximum speed, it forms a strong magnetic field. Magnetometers-sensors that measure magnetic fields-are affected by this magnetic field around the contact line. In this study, the magnetic field formed around a contact line was measured and its effect on magnetometers was indicated. In order to confirm the degree of influence of such fields on a magnetometer, a magnetic field around a contact line was measured and simulated. For a high-speed train traveling at 300 km/h, the magnetic field was measured at 14.1 µT, 3 m away from the contact line. In addition, a magnetic field was formed when a current of 300 A flowing through the contact line was simulated in a laboratory environment. The outcome of the simulation was then compared with the measured values. This study experimentally verified the measurement error of the magnetometer caused by the contact line and confirmed that a filter can be used to reduce the error.

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“…This is usually a frequency which varies from 1kHz to 40kHz depending on the different conversion stages and the possible noise is from the fast switching such as switching devices, hard-switching, acing in the catenary and also the high power cables. That equipment especially the low frequency need to be magnetic isolated from the environment since low frequency electromagnetic field must be investigated, which may harm the other equipment or human health [4][5]. For high frequency EM sources, it should work well and cannot be affected by the environmental electromagnetic radiation.…”

Section: Introductionmentioning

confidence: 99%

A polymer bonded gridded box EMI shielding method based on FEM for high speed railway

Cheng

Zou

et al. 2016

2016 International Symposium on Electrical Engineering (ISEE)

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When there is current passing through the air, the electromagnetic field occurs, which could interfere with the other apparatus nearby or even damage it. In this way, the electromagnetic sources could also be a victim. Therefore, the equipment need to be designed to both blocking and tolerated the electromagnetic radiation. The electromagnetic interference could be mitigated or minimized by many techniques like filtering, earthing, or enclosure. Especially in high speed railway, enclosing dc and ac system, high power and lower power system into a limited area requires the equipment generates less EMI and could perform against the interference by the other apparatus. Metal box shielding is a method when the circuit design alone cannot satisfy the requirement that the equipment could stand against the environmental EMI or emanating from the equipment. This paper presents a polymer bonded gridded box shielding method which is light, flexible, material saved and suitable for high and low frequency shielding by employing polymer material.

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Environmental 50Hz magnetic field produced by a railway line equipped with autotransformers

Cited by 6 publications

References 2 publications

Calculation of Magnetic Fields Generated by Traction Transformers and Busbars in Electric Locomotive Systems by Finite Element Method

Calculation of Magnetic Fields Generated by Traction Transformers and Busbars in Electric Locomotive Systems by Finite Element Method

Effects of Magnetic Fields Around Contact Lines on Magnetometers

A polymer bonded gridded box EMI shielding method based on FEM for high speed railway

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