TY JOUR TI The Impact of the Contact Rail on the Traction Current Harmonic Distribution in Metro Running Rails KW the Metro KW asymmetry coefficient KW electromagnetic compatibility KW traction current KW contact rail KW rail line KW magnetic impact/influence KW simulation modelling JO Transport automation research AU Kabetskiy, A.G. PY 2026 IS 12 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"