## 3 Results
### Numerical Simulations of Electric and Magnetic Field Intensities around Energy Infrastructure
The minimum distance of the building wall from the extreme high-voltage line wire is 7.4 m. Line parameters: OS24 P-type pole with a suspension height of the lowest wire of 15 m and OS24 ON150-type pole with a suspension height of the lowest wire of 12 m, a span length is 215 m. The minimum suspension height of the lowest phase wire was estimated at 8.05 m. In order to tighten the simulation results, the highest effective value of the phase voltage of 68.4 kV was assumed in the L1-phase wires (based on energy quality measurements, the average value of the phase-to-phase voltage was 118.4 kV). In the remaining L2- and L3-phase wires, the values then occur at (\(-\)34.2) kV. The maximum phase current values for the first and the second circuit are 437.1 A and 310.1 A, respectively;
* Parking under a 110 kV overhead line: Parking for cars and trucks located under a 110 kV high-voltage line with the following parameters: a maximum long-term load capacity of 709 A. The minimum suspension height was determined on the basis of geodetic measurements carried out at a temperature of 2 \({}^{\circ}\)C. For phase L1 (\(-\)3.37 m from the line axis) and L3 (3.13 m from the line axis), the suspension height was 12.28 m, and for phase L2 (2.32 m from the line axis), the suspension height was determined at 15.76 m. The obtained heights were reduced by a distance of 1.3 m, which results from a higher temperature of the conductor or catastrophic conditions;
* Terraced buildings near 110 kV double-track overhead lines: A residential building located 9 m from the extreme conductor (phase L1) of a double-circuit overhead line with a voltage of 110 kV. The analyzed line section is characterized by the following parameters: an AEG ON-type pole with a suspension height of the lowest conductor of 12.65 m and an AEG O-type pole for which the suspension height of the lowest conductor is 14.75 m (the suspension heights are given in relation to the base of the poles, taking into account the dimensions of the insulators), a span length of 131.14 m. The minimum suspension height was estimated as 9.5 m. A maximum current of 475 A was assumed in each of the line circuits;
* A multi-family building with balconies near a 15 kV overhead line: A residential building constructed 3.8 m from the end pole of the 15 kV MV overhead line. A medium-voltage line terminated with a Kgo-13.5/25 MV cable connection. The long-term load capacity of the investigated line was equal to 280 A;
* A multi-family building under a 110 kV overhead line: A residential building for which the smallest distance to the extreme conductors of the 110 kV HV line is 6.12 m. The analyzed line section is characterized by the following parameters: an SW24 ON120+5-type pole with a suspension height of 70.36 m and an SW24 KN60+10-type pole with a suspension height of 43.58 m (the suspension heights are given in relation to the zero reference level defined by sea level). The minimum suspension height over the analyzed building was estimated as 53.3 m. A maximum current of 675 A was assumed in each of the line circuits. For the purposes of numerical simulations for the above cases, the following assumptions were made. In the case of 110 kV lines, AFL 6-240-type working conductors with a design diameter of 21.7 mm were used, while for the 15 kV line, the AFL 70 type (diameter equal to 11.3 mm) was employed. Distances between conductors were estimated according to the data for the used poles. The suspension heights of conductors were determined on the basis of the line parameters except in cases where they were measured directly.