TY JOUR TI DEVELOPMENT TRENDS OF INTELLIGENT ELECTRICAL SUBSTATION ARCHITECTURE KW efficiency KW power transmission KW ultra-high voltage KW direct current technology KW connections be-tween power systems JO Bulletin of the Angarsk State Technical University AU Konovalov, Y.V. AU Terekhova, A.A. AU Shitenkov, G.A. AU Golovatiukov, L.K. AU Malinin, N.K. AU Gusev, I.G. PY 2023 IS 1 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»