Yagup E. Suppression of uncanonical harmonics in input currents of traction substation

3. Electromagnetic processes which define uncanonical harmonics of traction substation rectifiers generation into supply line. Search of ways of uncanonical harmonics of input currents of rectifiers with booster converter suppress by means of automatic regulation. Calssical electric circuit theory, automatic regulation theory, z-transformation, A-stable methods of numerical solutions of systems of differential equations, Nelder-Mead simplex-method. Recommended for practical application for new rectifiers modernization and exploration to enhance electrical energy quality in supply net. The structures of closed-loop systems of suppression uncanonical harmonics of input currents of rectifiers with booster converter had been proposed. Electrification and Energy Saving Department of Ukrzaliznyitsa, Kiev, SRI "KHEMZ", Kharkov, IC "Energosberezhenie", Kharkov, UkrSART, Kharkov. Traction substations.