Cherepanov A.V. Eectromagnetic influence of traction networks on pipelines in short circuit modes [Electronic resource] / A.V. Cherepanov, A.E. Kryukov // Young science of Siberia: electron. scientific journal - 2020. - No. 2(8). - Access mode: http://mnv.irgups.ru/toma/28-20, free. - Zagl. from the screen. - Yaz. Russian, English (date of the application: 23.09.2019)
Steel pipelines can be laid along the routes of AC main railways electrified through 25 and 2x25 kV systems. As a result of the electromagnetic influence of traction networks on pipes having insulating coatings, voltages that are dangerous to personnel who operate the pipeline can be induced. Important induced voltages can occur briefly in short-circuit modes of the contact wire to the rail. To determine the induced voltage levels, a traction power supply system of 25 kV was simulated, in parallel with the traction network of which a pipeline was laid at a distance of 100 m with a pipe diameter of 250 mm, grounded on both sides. The simulation results showed that in the short circuit modes of the traction network of 25 kV at individual points of the pipes, the magnitude of the induced voltage can exceed 500 V.
In traction networks of 2x25 kV, the following types of short circuit can take place: short circuit of a contact wire to a rail; short circuit of the supply wire to the rail; short circuit between the contact suspension and the supply wire. Modeling showed that the maximum induced voltages, reaching 503 ... 512, have a place with short-circuit con-tact suspension or supply wire to the rail. With a short circuit between the contact suspension and the supply wire, the maximum induced voltage does not exceed 22 V.
Thus, in the short circuit modes of traction networks of 25 and 2x25 kV, the induced voltages on the pipeline with an approach width of 100 m do not exceed the permissible value of 1000 V established by the regulatory document TRL-71.
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