00687naa#a2200181#i#450# EN\\bibl\126440 20260630064057.2 2223-9987 20260629b2026####ek#y0engy0150####ca RU Electrothermal Model of an AC Catenary and Mechanisms of Ice Melting under an Autotransformer Traction Power Supply System Journal article Saint-Petersburg FSBEI HE "Emperor Alexander I St. Petersburg State Transport University" 2026 12 с. Journal article local Распределение энергии. Сети. 621.332 LI Iyuan' Vikulov Il'ya Pavlovich atjournal.ru