Improving the theory for calculating the rational modes of traction electrical equipmentA.E. Auhadeev, R.G. Idiyatullin, P.P. Pavlov, V.M. Butakov, L.N. Kisneeva and D.I. TukhbatullinaE3S Web Conf., 124 (2019) 05077DOI: https://doi.org/10.1051/e3sconf/201912405077