TY JOUR TI Model for Joint Operation of Traction and External Power Supply System KW Traction power supply KW two-way power supply KW equalizing current KW power flow KW power flow calculation KW PU-generator JO Bulletin of scientific research results AU Agunov, A.V. AU Burkov, A.T. AU Ivanov, M.A. PY 2022 IS 2022 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"