Andrey V. Kryukov, Dmitry A. Seredkin, Ekaterina V. Voronina

Irkutsk state transport university

The rapid expansion of modern cities and the development of energy infrastructure are bringing residential and public buildings closer to ultra-high-voltage overhead power lines. These lines emit high-intensity industrial-frequency electromagnetic fields (EMF), which pose a health hazard to the public, can cause malfunctions in sensitive electronic equipment, and have a negative impact on the environment. Therefore, ensuring electromagnetic safety is particularly important. To reduce EMF intensity and ensure adequate levels of electromagnetic safety, the following measures are used: converting power lines to lower voltage, replacing overhead lines with cables, installing cable screens, etc. In today's environment, the selection of technically sound solutions should be based on the results of detailed computer modeling, taking into account the actual operating modes of electric power systems. This article presents the results of research aimed at developing models of electric power systems that included power lines equipped with cable screens. A distinctive feature of the proposed approach is its comprehensive consideration of factors ignored in simplified calculations, such as current and voltage asymmetry, the presence of higher harmonics introduced by nonlinear loads (in particular, rectifier electric locomotives), and the dynamics of load changes. The simulation was performed for a 500 kV transmission line, one section of which was equipped with shields using three options: the use of passive cable shields, the installation of active cable shields, and the combined use of active and passive shielding. To evaluate the effectiveness of cable shields, a model of an electrical network with a typical transmission line without shields was implemented. The simulation results showed that the combined installation of active and passive shields resulted in the greatest reduction in electric (up to 60%) and magnetic field (up to 36%) strengths. The obtained results can be used in practice to select measures to improve electromagnetic safety conditions near high-voltage transmission lines.

power lines, electromagnetic fields, shielding

2026-03-05