Measurement of magnetic field produced by the 25kV-50Hz Italian high speed railway line

Lucca, Giovanni; Moro, M.; Pagani, Alfonso; Zucchelli, L.

doi:10.1109/speedam.2006.1649932

Cited by 5 publications

(7 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar estimates [22] of the level of the B-field were also performed by Italian researchers at points 10 m away from a high-speed railway line electrified by 25 kV, 50 Hz. The values of magnetic induction are provided during train movement at a speed of 250 km/h at a current of 390 A.…”

Section: Analysis Of Selected Research Studies Dedicated To Power Los...supporting

confidence: 73%

“…In this regard, the authors of this article propose a new so-called "field" approach to assess power losses in electric traction systems; that is, an approach based on the theory of the electromagnetic field, according to which the transmission of electricity by quantity and direction is characterised by the Poynting vector → S [9,10]: Works [18,19] have significant theoretical and practical investigations dedicated to waves propagation in the overhead wires and accurate calculations of magnetic field intensity in general applications. At the same time, a significant number of publications, for example [20][21][22][23][24][25][26][27], present the results of determining, by calculation or experiment, the strengths of electric → E or magnetic → H fields at various points in the spaces of electric traction systems. However, the energy properties and functions of these fields are not considered.…”

Section: Analysis Of Selected Research Studies Dedicated To Power Los...mentioning

confidence: 99%

“…Power losses in the equivalent contact wire were determined by Equation ( 21), and in the equivalent rail, steel roof sheets of the electric locomotive and carriages, as well as in the steel sheets of the carriage bottoms according to Equation (22). At the same time, the necessary values of the magnetic field strength H S on the surfaces of these devices and elements were estimated by various methods depending on their shapes and physical dimensions.…”

Section: Conditions For Numerical Calculations Of Power Lossesmentioning

confidence: 99%

“…Thus, the sheets of roofs and bottoms of carriages can be considered infinite electrically conductive half-spaces. In this regard, magnetic field strengths on the surface of roofs and bottoms, necessary for estimating power losses in them according to Equation (22), were determined by the mirror image method well established in theoretical electrical engineering [32,38]. In this case, the equivalent contact wire and, accordingly, the equivalent rail could be represented as in Figure 2.…”

Section: Power Losses In Steel Sheets Of Carriage Roofs and Bottomsmentioning

confidence: 99%

See 3 more Smart Citations

Electrodynamics of Power Losses in the Devices of Inter-Substation Zones of AC Electric Traction Systems

et al. 2022

View full text Add to dashboard Cite

This article presents a new method for the estimation of active power losses based on a “field” approach, i.e., on the theory of the electromagnetic field and the theory of propagation of electromagnetic waves in a dielectric medium. Electromagnetic waves are assumed to transmit energy from the traction substation to electric rolling stock through the airspace of the inter-substation zone (i.e., not through the wires of the traction network) and meet electrically conductive surfaces on their way. The waves are partially reflected from the surfaces and partially penetrate them, thus creating thermal losses, the determination of which is the main task of this article. The analytical expressions for specific losses of active power are obtained by solving the system of Maxwell’s equations. Calculations of specific power losses in the catenary, rails, roofs, and bottoms of carriages and electric locomotives are performed. Power losses in carriages and electric locomotives are found to be at least 7%. A comparative assessment of the magnitude of total power losses of different types obtained by the “field” and “circuit” approaches is provided, which has established that “conditional” losses correspond to losses in rails, train carriages, and electric locomotives.

show abstract

Section: Analysis Of Selected Research Studies Dedicated To Power Los...supporting

confidence: 73%

Section: Analysis Of Selected Research Studies Dedicated To Power Los...mentioning

confidence: 99%

Section: Conditions For Numerical Calculations Of Power Lossesmentioning

confidence: 99%

Section: Power Losses In Steel Sheets Of Carriage Roofs and Bottomsmentioning

confidence: 99%

See 2 more Smart Citations

Electrodynamics of Power Losses in the Devices of Inter-Substation Zones of AC Electric Traction Systems

et al. 2022

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

View full text Add to dashboard Cite

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.

show abstract

Research on the influence of power frequency magnetic field of pantograph on pacemaker wearers’ health in high-speed EMU

Tian,

Li,

et al. 2024

Radiation Protection Dosimetry

View full text Add to dashboard Cite

When the popular means of transportation—high-speed trains meet the increasing rate of pacemaker implantation year by year, the research on the magnetic field environment on the health of pacemaker wearers in the carriage becomes an urgent problem. In this work, models of an electric multiple unit carriage with a pantograph as well as passengers with pacemakers were built by using COMSOL Multiphysics software. The B, Ein and Jin of human heart and other tissues, and the induced voltage (Vin) at the pacemaker electrode were calculated under the pantograph operating condition, so as to assess the effect of its magnetic field on the health of pacemaker wearers. The results showed that Bmax in the carriage without passengers is 121.246 μT, occurs near the window. In the carriage, the Bmax, Ein max and Jin max of heart and body, Vin at the pacemaker electrode of the passenger next to the window are greater than that in the middle of the carriage. The Bmax, Ein max and Jin max of passengers’ heart are 11.301μT, 1.613 mV/m and 139.030 μA/m2, respectively. The Bmax, Ein max and Jin max of passengers’ body are 12.597μT, 0.788 mV/m and 75.299 μA/m2, respectively. The maximum value of Vin at the tip of the pacemaker electrode of the passengers’ is 0.048 mV. The Bmax, Ein max in all tissues of passengers are much smaller than the basic limits of electromagnetic exposure to the public set by the International Commission on Non-Ionizing Radiation. Vin at the electrode tip of passengers’ pacemakers are less than the perception sensitivity set by the International Organization for Standardization. This work illustrated that the magnetic field generated by the pantograph is within the recognized accepted limits for passengers with pacemakers, but we still recommended that passengers wearing pacemakers should stay as far away from windows as possible.

show abstract

Measurement of magnetic field produced by the 25kV-50Hz Italian high speed railway line

Cited by 5 publications

References 1 publication

Electrodynamics of Power Losses in the Devices of Inter-Substation Zones of AC Electric Traction Systems

Electrodynamics of Power Losses in the Devices of Inter-Substation Zones of AC Electric Traction Systems

Effects of Magnetic Fields Around Contact Lines on Magnetometers

Research on the influence of power frequency magnetic field of pantograph on pacemaker wearers’ health in high-speed EMU

Contact Info

Product

Resources

About