Abstract
Results of computer-aided studies of electromagnetic environment at railroad junctions of alternating current electrified railroads having voltage of 25 kV are presented. A large number of lines and overhead catenaries significantly complicate the picture of electromagnetic field distribution. The nature of the field distribution in space is significantly affected by the rolling stock on station tracks. Besides, the task of electromagnetic environment modeling is complicated by the presence of underground pipelines and enclosures, and reinforced concrete passenger platforms. During the transfer of power of 10 + j10 MV·A through the junction of overhead system, the magnetic field strength at a level of 1,8 m is considerably less than the magnetic strength at a railway haul due to current distribution on overhead system of several tracks. Magnetic field strength levels in calculation examples do not exceed amplitude of 30 A/m. The train performance leads to changes in the strengths of the electrical and magnetic fields. The dynamics of changes is presented as a result of simulation modeling of train movement modes.
Highlights
A combination of electromagnetic processes in a given area of space is characterized by the term of electromagnetic environment (EME)
The nature of electromagnetic fields (EMF) spatial distribution is significantly affected by metal cars and cisterns that can stay at station tracks for a long time
A large number of tracks and overhead catenaries complicate the picture of electromagnetic field distribution pattern significantly
Summary
A combination of electromagnetic processes in a given area of space is characterized by the term of electromagnetic environment (EME). In a number of cases, especially, when the railroad track goes through a residential area, the levels of electromagnetic fields (EMF) strengths created by electrical traction network can exceed the permissible norms [1]. The tasks of EME modeling are especially important at the railroad junctions. These facilities are subject to stricter electromagnetic safety regulations due to a possibility of a large number of people occurring there. The junctions have a large number of tracks and overhead catenaries, which significantly complicates the picture of EMF distribution [1, 13 -17]. One more factor complicating the task of EMF modeling at railroad junctions is the presence of metal pipelines which . The article contains the results of computer-aided studies of the above factors
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